Add files using upload-large-folder tool

python/Lib/site-packages/setuptools/_distutils/archive_util.py

@@ -0,0 +1,284 @@
+"""distutils.archive_util
+
+Utility functions for creating archive files (tarballs, zip files,
+that sort of thing)."""
+
+from __future__ import annotations
+
+import os
+from typing import Literal, overload
+
+try:
+    import zipfile
+except ImportError:
+    zipfile = None
+
+
+from ._log import log
+from .dir_util import mkpath
+from .errors import DistutilsExecError
+from .spawn import spawn
+
+try:
+    from pwd import getpwnam
+except ImportError:
+    getpwnam = None
+
+try:
+    from grp import getgrnam
+except ImportError:
+    getgrnam = None
+
+
+def _get_gid(name):
+    """Returns a gid, given a group name."""
+    if getgrnam is None or name is None:
+        return None
+    try:
+        result = getgrnam(name)
+    except KeyError:
+        result = None
+    if result is not None:
+        return result[2]
+    return None
+
+
+def _get_uid(name):
+    """Returns an uid, given a user name."""
+    if getpwnam is None or name is None:
+        return None
+    try:
+        result = getpwnam(name)
+    except KeyError:
+        result = None
+    if result is not None:
+        return result[2]
+    return None
+
+
+def make_tarball(
+    base_name: str,
+    base_dir: str | os.PathLike[str],
+    compress: Literal["gzip", "bzip2", "xz"] | None = "gzip",
+    verbose: bool = False,
+    owner: str | None = None,
+    group: str | None = None,
+) -> str:
+    """Create a (possibly compressed) tar file from all the files under
+    'base_dir'.
+
+    'compress' must be "gzip" (the default), "bzip2", "xz", or None.
+
+    'owner' and 'group' can be used to define an owner and a group for the
+    archive that is being built. If not provided, the current owner and group
+    will be used.
+
+    The output tar file will be named 'base_dir' +  ".tar", possibly plus
+    the appropriate compression extension (".gz", ".bz2", ".xz" or ".Z").
+
+    Returns the output filename.
+    """
+    tar_compression = {
+        'gzip': 'gz',
+        'bzip2': 'bz2',
+        'xz': 'xz',
+        None: '',
+    }
+    compress_ext = {'gzip': '.gz', 'bzip2': '.bz2', 'xz': '.xz'}
+
+    # flags for compression program, each element of list will be an argument
+    if compress is not None and compress not in compress_ext.keys():
+        raise ValueError(
+            "bad value for 'compress': must be None, 'gzip', 'bzip2', 'xz'"
+        )
+
+    archive_name = base_name + '.tar'
+    archive_name += compress_ext.get(compress, '')
+
+    mkpath(os.path.dirname(archive_name))
+
+    # creating the tarball
+    import tarfile  # late import so Python build itself doesn't break
+
+    log.info('Creating tar archive')
+
+    uid = _get_uid(owner)
+    gid = _get_gid(group)
+
+    def _set_uid_gid(tarinfo):
+        if gid is not None:
+            tarinfo.gid = gid
+            tarinfo.gname = group
+        if uid is not None:
+            tarinfo.uid = uid
+            tarinfo.uname = owner
+        return tarinfo
+
+    tar = tarfile.open(archive_name, f'w|{tar_compression[compress]}')
+    try:
+        tar.add(base_dir, filter=_set_uid_gid)
+    finally:
+        tar.close()
+
+    return archive_name
+
+
+def make_zipfile(
+    base_name: str,
+    base_dir: str | os.PathLike[str],
+    verbose: bool = False,
+) -> str:
+    """Create a zip file from all the files under 'base_dir'.
+
+    The output zip file will be named 'base_name' + ".zip".  Uses either the
+    "zipfile" Python module (if available) or the InfoZIP "zip" utility
+    (if installed and found on the default search path).  If neither tool is
+    available, raises DistutilsExecError.  Returns the name of the output zip
+    file.
+    """
+    zip_filename = base_name + ".zip"
+    mkpath(os.path.dirname(zip_filename))
+
+    # If zipfile module is not available, try spawning an external
+    # 'zip' command.
+    if zipfile is None:
+        if verbose:
+            zipoptions = "-r"
+        else:
+            zipoptions = "-rq"
+
+        try:
+            spawn(["zip", zipoptions, zip_filename, base_dir])
+        except DistutilsExecError:
+            # XXX really should distinguish between "couldn't find
+            # external 'zip' command" and "zip failed".
+            raise DistutilsExecError(
+                f"unable to create zip file '{zip_filename}': "
+                "could neither import the 'zipfile' module nor "
+                "find a standalone zip utility"
+            )
+
+    else:
+        log.info("creating '%s' and adding '%s' to it", zip_filename, base_dir)
+
+        try:
+            zip = zipfile.ZipFile(zip_filename, "w", compression=zipfile.ZIP_DEFLATED)
+        except RuntimeError:
+            zip = zipfile.ZipFile(zip_filename, "w", compression=zipfile.ZIP_STORED)
+
+        with zip:
+            if base_dir != os.curdir:
+                path = os.path.normpath(os.path.join(base_dir, ''))
+                zip.write(path, path)
+                log.info("adding '%s'", path)
+            for dirpath, dirnames, filenames in os.walk(base_dir):
+                for name in dirnames:
+                    path = os.path.normpath(os.path.join(dirpath, name, ''))
+                    zip.write(path, path)
+                    log.info("adding '%s'", path)
+                for name in filenames:
+                    path = os.path.normpath(os.path.join(dirpath, name))
+                    if os.path.isfile(path):
+                        zip.write(path, path)
+                        log.info("adding '%s'", path)
+
+    return zip_filename
+
+
+ARCHIVE_FORMATS = {
+    'gztar': (make_tarball, [('compress', 'gzip')], "gzip'ed tar-file"),
+    'bztar': (make_tarball, [('compress', 'bzip2')], "bzip2'ed tar-file"),
+    'xztar': (make_tarball, [('compress', 'xz')], "xz'ed tar-file"),
+    'ztar': (make_tarball, [('compress', 'compress')], "compressed tar file"),
+    'tar': (make_tarball, [('compress', None)], "uncompressed tar file"),
+    'zip': (make_zipfile, [], "ZIP file"),
+}
+
+
+def check_archive_formats(formats):
+    """Returns the first format from the 'format' list that is unknown.
+
+    If all formats are known, returns None
+    """
+    for format in formats:
+        if format not in ARCHIVE_FORMATS:
+            return format
+    return None
+
+
+@overload
+def make_archive(
+    base_name: str,
+    format: str,
+    root_dir: str | os.PathLike[str] | bytes | os.PathLike[bytes] | None = None,
+    base_dir: str | None = None,
+    verbose: bool = False,
+    owner: str | None = None,
+    group: str | None = None,
+) -> str: ...
+@overload
+def make_archive(
+    base_name: str | os.PathLike[str],
+    format: str,
+    root_dir: str | os.PathLike[str] | bytes | os.PathLike[bytes],
+    base_dir: str | None = None,
+    verbose: bool = False,
+    owner: str | None = None,
+    group: str | None = None,
+) -> str: ...
+def make_archive(
+    base_name: str | os.PathLike[str],
+    format: str,
+    root_dir: str | os.PathLike[str] | bytes | os.PathLike[bytes] | None = None,
+    base_dir: str | None = None,
+    verbose: bool = False,
+    owner: str | None = None,
+    group: str | None = None,
+) -> str:
+    """Create an archive file (eg. zip or tar).
+
+    'base_name' is the name of the file to create, minus any format-specific
+    extension; 'format' is the archive format: one of "zip", "tar", "gztar",
+    "bztar", "xztar", or "ztar".
+
+    'root_dir' is a directory that will be the root directory of the
+    archive; ie. we typically chdir into 'root_dir' before creating the
+    archive.  'base_dir' is the directory where we start archiving from;
+    ie. 'base_dir' will be the common prefix of all files and
+    directories in the archive.  'root_dir' and 'base_dir' both default
+    to the current directory.  Returns the name of the archive file.
+
+    'owner' and 'group' are used when creating a tar archive. By default,
+    uses the current owner and group.
+    """
+    save_cwd = os.getcwd()
+    if root_dir is not None:
+        log.debug("changing into '%s'", root_dir)
+        base_name = os.path.abspath(base_name)
+        os.chdir(root_dir)
+
+    if base_dir is None:
+        base_dir = os.curdir
+
+    kwargs: dict[str, bool | None] = {}
+
+    try:
+        format_info = ARCHIVE_FORMATS[format]
+    except KeyError:
+        raise ValueError(f"unknown archive format '{format}'")
+
+    func = format_info[0]
+    kwargs.update(format_info[1])
+
+    if format != 'zip':
+        kwargs['owner'] = owner
+        kwargs['group'] = group
+
+    try:
+        filename = func(base_name, base_dir, **kwargs)
+    finally:
+        if root_dir is not None:
+            log.debug("changing back to '%s'", save_cwd)
+            os.chdir(save_cwd)
+
+    return filename

python/Lib/site-packages/setuptools/_distutils/ccompiler.py

@@ -0,0 +1,26 @@
+from .compat.numpy import (  # noqa: F401
+    _default_compilers,
+    compiler_class,
+)
+from .compilers.C import base
+from .compilers.C.base import (
+    gen_lib_options,
+    gen_preprocess_options,
+    get_default_compiler,
+    new_compiler,
+    show_compilers,
+)
+from .compilers.C.errors import CompileError, LinkError
+
+__all__ = [
+    'CompileError',
+    'LinkError',
+    'gen_lib_options',
+    'gen_preprocess_options',
+    'get_default_compiler',
+    'new_compiler',
+    'show_compilers',
+]
+
+
+CCompiler = base.Compiler

python/Lib/site-packages/setuptools/_distutils/cmd.py

@@ -0,0 +1,535 @@
+"""distutils.cmd
+
+Provides the Command class, the base class for the command classes
+in the distutils.command package.
+"""
+
+from __future__ import annotations
+
+import logging
+import os
+import re
+import sys
+from abc import abstractmethod
+from collections.abc import Callable, MutableSequence
+from typing import TYPE_CHECKING, Any, ClassVar, TypeVar, overload
+
+from . import _modified, archive_util, dir_util, file_util, util
+from ._log import log
+from .errors import DistutilsOptionError
+
+if TYPE_CHECKING:
+    # type-only import because of mutual dependence between these classes
+    from distutils.dist import Distribution
+
+    from typing_extensions import TypeVarTuple, Unpack
+
+    _Ts = TypeVarTuple("_Ts")
+
+_StrPathT = TypeVar("_StrPathT", bound="str | os.PathLike[str]")
+_BytesPathT = TypeVar("_BytesPathT", bound="bytes | os.PathLike[bytes]")
+_CommandT = TypeVar("_CommandT", bound="Command")
+
+
+class Command:
+    """Abstract base class for defining command classes, the "worker bees"
+    of the Distutils.  A useful analogy for command classes is to think of
+    them as subroutines with local variables called "options".  The options
+    are "declared" in 'initialize_options()' and "defined" (given their
+    final values, aka "finalized") in 'finalize_options()', both of which
+    must be defined by every command class.  The distinction between the
+    two is necessary because option values might come from the outside
+    world (command line, config file, ...), and any options dependent on
+    other options must be computed *after* these outside influences have
+    been processed -- hence 'finalize_options()'.  The "body" of the
+    subroutine, where it does all its work based on the values of its
+    options, is the 'run()' method, which must also be implemented by every
+    command class.
+    """
+
+    # 'sub_commands' formalizes the notion of a "family" of commands,
+    # eg. "install" as the parent with sub-commands "install_lib",
+    # "install_headers", etc.  The parent of a family of commands
+    # defines 'sub_commands' as a class attribute; it's a list of
+    #    (command_name : string, predicate : unbound_method | string | None)
+    # tuples, where 'predicate' is a method of the parent command that
+    # determines whether the corresponding command is applicable in the
+    # current situation.  (Eg. we "install_headers" is only applicable if
+    # we have any C header files to install.)  If 'predicate' is None,
+    # that command is always applicable.
+    #
+    # 'sub_commands' is usually defined at the *end* of a class, because
+    # predicates can be unbound methods, so they must already have been
+    # defined.  The canonical example is the "install" command.
+    sub_commands: ClassVar[  # Any to work around variance issues
+        list[tuple[str, Callable[[Any], bool] | None]]
+    ] = []
+
+    user_options: ClassVar[
+        # Specifying both because list is invariant. Avoids mypy override assignment issues
+        list[tuple[str, str, str]] | list[tuple[str, str | None, str]]
+    ] = []
+
+    # -- Creation/initialization methods -------------------------------
+
+    def __init__(self, dist: Distribution) -> None:
+        """Create and initialize a new Command object.  Most importantly,
+        invokes the 'initialize_options()' method, which is the real
+        initializer and depends on the actual command being
+        instantiated.
+        """
+        # late import because of mutual dependence between these classes
+        from distutils.dist import Distribution
+
+        if not isinstance(dist, Distribution):
+            raise TypeError("dist must be a Distribution instance")
+        if self.__class__ is Command:
+            raise RuntimeError("Command is an abstract class")
+
+        self.distribution = dist
+        self.initialize_options()
+
+        # Per-command versions of the global flags, so that the user can
+        # customize Distutils' behaviour command-by-command and let some
+        # commands fall back on the Distribution's behaviour. None means
+        # "not defined, check self.distribution's copy".
+
+        # verbose is largely ignored, but needs to be set for
+        # backwards compatibility (I think)?
+        self.verbose = dist.verbose
+
+        # Some commands define a 'self.force' option to ignore file
+        # timestamps, but methods defined *here* assume that
+        # 'self.force' exists for all commands.  So define it here
+        # just to be safe.
+        self.force = None
+
+        # The 'help' flag is just used for command-line parsing, so
+        # none of that complicated bureaucracy is needed.
+        self.help = False
+
+        # 'finalized' records whether or not 'finalize_options()' has been
+        # called.  'finalize_options()' itself should not pay attention to
+        # this flag: it is the business of 'ensure_finalized()', which
+        # always calls 'finalize_options()', to respect/update it.
+        self.finalized = False
+
+    def ensure_finalized(self) -> None:
+        if not self.finalized:
+            self.finalize_options()
+        self.finalized = True
+
+    # Subclasses must define:
+    #   initialize_options()
+    #     provide default values for all options; may be customized by
+    #     setup script, by options from config file(s), or by command-line
+    #     options
+    #   finalize_options()
+    #     decide on the final values for all options; this is called
+    #     after all possible intervention from the outside world
+    #     (command-line, option file, etc.) has been processed
+    #   run()
+    #     run the command: do whatever it is we're here to do,
+    #     controlled by the command's various option values
+
+    @abstractmethod
+    def initialize_options(self) -> None:
+        """Set default values for all the options that this command
+        supports.  Note that these defaults may be overridden by other
+        commands, by the setup script, by config files, or by the
+        command-line.  Thus, this is not the place to code dependencies
+        between options; generally, 'initialize_options()' implementations
+        are just a bunch of "self.foo = None" assignments.
+
+        This method must be implemented by all command classes.
+        """
+        raise RuntimeError(
+            f"abstract method -- subclass {self.__class__} must override"
+        )
+
+    @abstractmethod
+    def finalize_options(self) -> None:
+        """Set final values for all the options that this command supports.
+        This is always called as late as possible, ie.  after any option
+        assignments from the command-line or from other commands have been
+        done.  Thus, this is the place to code option dependencies: if
+        'foo' depends on 'bar', then it is safe to set 'foo' from 'bar' as
+        long as 'foo' still has the same value it was assigned in
+        'initialize_options()'.
+
+        This method must be implemented by all command classes.
+        """
+        raise RuntimeError(
+            f"abstract method -- subclass {self.__class__} must override"
+        )
+
+    def dump_options(self, header=None, indent=""):
+        from distutils.fancy_getopt import longopt_xlate
+
+        if header is None:
+            header = f"command options for '{self.get_command_name()}':"
+        self.announce(indent + header, level=logging.INFO)
+        indent = indent + "  "
+        for option, _, _ in self.user_options:
+            option = option.translate(longopt_xlate)
+            if option[-1] == "=":
+                option = option[:-1]
+            value = getattr(self, option)
+            self.announce(indent + f"{option} = {value}", level=logging.INFO)
+
+    @abstractmethod
+    def run(self) -> None:
+        """A command's raison d'etre: carry out the action it exists to
+        perform, controlled by the options initialized in
+        'initialize_options()', customized by other commands, the setup
+        script, the command-line, and config files, and finalized in
+        'finalize_options()'.  All terminal output and filesystem
+        interaction should be done by 'run()'.
+
+        This method must be implemented by all command classes.
+        """
+        raise RuntimeError(
+            f"abstract method -- subclass {self.__class__} must override"
+        )
+
+    def announce(self, msg: object, level: int = logging.DEBUG) -> None:
+        log.log(level, msg)
+
+    def debug_print(self, msg: object) -> None:
+        """Print 'msg' to stdout if the global DEBUG (taken from the
+        DISTUTILS_DEBUG environment variable) flag is true.
+        """
+        from distutils.debug import DEBUG
+
+        if DEBUG:
+            print(msg)
+            sys.stdout.flush()
+
+    # -- Option validation methods -------------------------------------
+    # (these are very handy in writing the 'finalize_options()' method)
+    #
+    # NB. the general philosophy here is to ensure that a particular option
+    # value meets certain type and value constraints.  If not, we try to
+    # force it into conformance (eg. if we expect a list but have a string,
+    # split the string on comma and/or whitespace).  If we can't force the
+    # option into conformance, raise DistutilsOptionError.  Thus, command
+    # classes need do nothing more than (eg.)
+    #   self.ensure_string_list('foo')
+    # and they can be guaranteed that thereafter, self.foo will be
+    # a list of strings.
+
+    def _ensure_stringlike(self, option, what, default=None):
+        val = getattr(self, option)
+        if val is None:
+            setattr(self, option, default)
+            return default
+        elif not isinstance(val, str):
+            raise DistutilsOptionError(f"'{option}' must be a {what} (got `{val}`)")
+        return val
+
+    def ensure_string(self, option: str, default: str | None = None) -> None:
+        """Ensure that 'option' is a string; if not defined, set it to
+        'default'.
+        """
+        self._ensure_stringlike(option, "string", default)
+
+    def ensure_string_list(self, option: str) -> None:
+        r"""Ensure that 'option' is a list of strings.  If 'option' is
+        currently a string, we split it either on /,\s*/ or /\s+/, so
+        "foo bar baz", "foo,bar,baz", and "foo,   bar baz" all become
+        ["foo", "bar", "baz"].
+        """
+        val = getattr(self, option)
+        if val is None:
+            return
+        elif isinstance(val, str):
+            setattr(self, option, re.split(r',\s*|\s+', val))
+        else:
+            if isinstance(val, list):
+                ok = all(isinstance(v, str) for v in val)
+            else:
+                ok = False
+            if not ok:
+                raise DistutilsOptionError(
+                    f"'{option}' must be a list of strings (got {val!r})"
+                )
+
+    def _ensure_tested_string(self, option, tester, what, error_fmt, default=None):
+        val = self._ensure_stringlike(option, what, default)
+        if val is not None and not tester(val):
+            raise DistutilsOptionError(
+                ("error in '%s' option: " + error_fmt) % (option, val)
+            )
+
+    def ensure_filename(self, option: str) -> None:
+        """Ensure that 'option' is the name of an existing file."""
+        self._ensure_tested_string(
+            option, os.path.isfile, "filename", "'%s' does not exist or is not a file"
+        )
+
+    def ensure_dirname(self, option: str) -> None:
+        self._ensure_tested_string(
+            option,
+            os.path.isdir,
+            "directory name",
+            "'%s' does not exist or is not a directory",
+        )
+
+    # -- Convenience methods for commands ------------------------------
+
+    def get_command_name(self) -> str:
+        if hasattr(self, 'command_name'):
+            return self.command_name
+        else:
+            return self.__class__.__name__
+
+    def set_undefined_options(
+        self, src_cmd: str, *option_pairs: tuple[str, str]
+    ) -> None:
+        """Set the values of any "undefined" options from corresponding
+        option values in some other command object.  "Undefined" here means
+        "is None", which is the convention used to indicate that an option
+        has not been changed between 'initialize_options()' and
+        'finalize_options()'.  Usually called from 'finalize_options()' for
+        options that depend on some other command rather than another
+        option of the same command.  'src_cmd' is the other command from
+        which option values will be taken (a command object will be created
+        for it if necessary); the remaining arguments are
+        '(src_option,dst_option)' tuples which mean "take the value of
+        'src_option' in the 'src_cmd' command object, and copy it to
+        'dst_option' in the current command object".
+        """
+        # Option_pairs: list of (src_option, dst_option) tuples
+        src_cmd_obj = self.distribution.get_command_obj(src_cmd)
+        src_cmd_obj.ensure_finalized()
+        for src_option, dst_option in option_pairs:
+            if getattr(self, dst_option) is None:
+                setattr(self, dst_option, getattr(src_cmd_obj, src_option))
+
+    # NOTE: Because distutils is private to Setuptools and not all commands are exposed here,
+    # not every possible command is enumerated in the signature.
+    def get_finalized_command(self, command: str, create: bool = True) -> Command:
+        """Wrapper around Distribution's 'get_command_obj()' method: find
+        (create if necessary and 'create' is true) the command object for
+        'command', call its 'ensure_finalized()' method, and return the
+        finalized command object.
+        """
+        cmd_obj = self.distribution.get_command_obj(command, create)
+        cmd_obj.ensure_finalized()
+        return cmd_obj
+
+    # XXX rename to 'get_reinitialized_command()'? (should do the
+    # same in dist.py, if so)
+    @overload
+    def reinitialize_command(
+        self, command: str, reinit_subcommands: bool = False
+    ) -> Command: ...
+    @overload
+    def reinitialize_command(
+        self, command: _CommandT, reinit_subcommands: bool = False
+    ) -> _CommandT: ...
+    def reinitialize_command(
+        self, command: str | Command, reinit_subcommands=False
+    ) -> Command:
+        return self.distribution.reinitialize_command(command, reinit_subcommands)
+
+    def run_command(self, command: str) -> None:
+        """Run some other command: uses the 'run_command()' method of
+        Distribution, which creates and finalizes the command object if
+        necessary and then invokes its 'run()' method.
+        """
+        self.distribution.run_command(command)
+
+    def get_sub_commands(self) -> list[str]:
+        """Determine the sub-commands that are relevant in the current
+        distribution (ie., that need to be run).  This is based on the
+        'sub_commands' class attribute: each tuple in that list may include
+        a method that we call to determine if the subcommand needs to be
+        run for the current distribution.  Return a list of command names.
+        """
+        commands = []
+        for cmd_name, method in self.sub_commands:
+            if method is None or method(self):
+                commands.append(cmd_name)
+        return commands
+
+    # -- External world manipulation -----------------------------------
+
+    def warn(self, msg: object) -> None:
+        log.warning("warning: %s: %s\n", self.get_command_name(), msg)
+
+    def execute(
+        self,
+        func: Callable[[Unpack[_Ts]], object],
+        args: tuple[Unpack[_Ts]],
+        msg: object = None,
+        level: int = 1,
+    ) -> None:
+        util.execute(func, args, msg)
+
+    def mkpath(self, name: str, mode: int = 0o777) -> None:
+        dir_util.mkpath(name, mode)
+
+    @overload
+    def copy_file(
+        self,
+        infile: str | os.PathLike[str],
+        outfile: _StrPathT,
+        preserve_mode: bool = True,
+        preserve_times: bool = True,
+        link: str | None = None,
+        level: int = 1,
+    ) -> tuple[_StrPathT | str, bool]: ...
+    @overload
+    def copy_file(
+        self,
+        infile: bytes | os.PathLike[bytes],
+        outfile: _BytesPathT,
+        preserve_mode: bool = True,
+        preserve_times: bool = True,
+        link: str | None = None,
+        level: int = 1,
+    ) -> tuple[_BytesPathT | bytes, bool]: ...
+    def copy_file(
+        self,
+        infile: str | os.PathLike[str] | bytes | os.PathLike[bytes],
+        outfile: str | os.PathLike[str] | bytes | os.PathLike[bytes],
+        preserve_mode: bool = True,
+        preserve_times: bool = True,
+        link: str | None = None,
+        level: int = 1,
+    ) -> tuple[str | os.PathLike[str] | bytes | os.PathLike[bytes], bool]:
+        """Copy a file respecting verbose, dry-run and force flags.  (The
+        former two default to whatever is in the Distribution object, and
+        the latter defaults to false for commands that don't define it.)"""
+        return file_util.copy_file(
+            infile,
+            outfile,
+            preserve_mode,
+            preserve_times,
+            not self.force,
+            link,
+        )
+
+    def copy_tree(
+        self,
+        infile: str | os.PathLike[str],
+        outfile: str,
+        preserve_mode: bool = True,
+        preserve_times: bool = True,
+        preserve_symlinks: bool = False,
+        level: int = 1,
+    ) -> list[str]:
+        """Copy an entire directory tree respecting verbose, dry-run,
+        and force flags.
+        """
+        return dir_util.copy_tree(
+            infile,
+            outfile,
+            preserve_mode,
+            preserve_times,
+            preserve_symlinks,
+            not self.force,
+        )
+
+    @overload
+    def move_file(
+        self, src: str | os.PathLike[str], dst: _StrPathT, level: int = 1
+    ) -> _StrPathT | str: ...
+    @overload
+    def move_file(
+        self, src: bytes | os.PathLike[bytes], dst: _BytesPathT, level: int = 1
+    ) -> _BytesPathT | bytes: ...
+    def move_file(
+        self,
+        src: str | os.PathLike[str] | bytes | os.PathLike[bytes],
+        dst: str | os.PathLike[str] | bytes | os.PathLike[bytes],
+        level: int = 1,
+    ) -> str | os.PathLike[str] | bytes | os.PathLike[bytes]:
+        """Move a file respecting dry-run flag."""
+        return file_util.move_file(src, dst)
+
+    def spawn(
+        self, cmd: MutableSequence[str], search_path: bool = True, level: int = 1
+    ) -> None:
+        """Spawn an external command respecting dry-run flag."""
+        from distutils.spawn import spawn
+
+        spawn(cmd, search_path)
+
+    @overload
+    def make_archive(
+        self,
+        base_name: str,
+        format: str,
+        root_dir: str | os.PathLike[str] | bytes | os.PathLike[bytes] | None = None,
+        base_dir: str | None = None,
+        owner: str | None = None,
+        group: str | None = None,
+    ) -> str: ...
+    @overload
+    def make_archive(
+        self,
+        base_name: str | os.PathLike[str],
+        format: str,
+        root_dir: str | os.PathLike[str] | bytes | os.PathLike[bytes],
+        base_dir: str | None = None,
+        owner: str | None = None,
+        group: str | None = None,
+    ) -> str: ...
+    def make_archive(
+        self,
+        base_name: str | os.PathLike[str],
+        format: str,
+        root_dir: str | os.PathLike[str] | bytes | os.PathLike[bytes] | None = None,
+        base_dir: str | None = None,
+        owner: str | None = None,
+        group: str | None = None,
+    ) -> str:
+        return archive_util.make_archive(
+            base_name,
+            format,
+            root_dir,
+            base_dir,
+            owner=owner,
+            group=group,
+        )
+
+    def make_file(
+        self,
+        infiles: str | list[str] | tuple[str, ...],
+        outfile: str | os.PathLike[str] | bytes | os.PathLike[bytes],
+        func: Callable[[Unpack[_Ts]], object],
+        args: tuple[Unpack[_Ts]],
+        exec_msg: object = None,
+        skip_msg: object = None,
+        level: int = 1,
+    ) -> None:
+        """Special case of 'execute()' for operations that process one or
+        more input files and generate one output file.  Works just like
+        'execute()', except the operation is skipped and a different
+        message printed if 'outfile' already exists and is newer than all
+        files listed in 'infiles'.  If the command defined 'self.force',
+        and it is true, then the command is unconditionally run -- does no
+        timestamp checks.
+        """
+        if skip_msg is None:
+            skip_msg = f"skipping {outfile} (inputs unchanged)"
+
+        # Allow 'infiles' to be a single string
+        if isinstance(infiles, str):
+            infiles = (infiles,)
+        elif not isinstance(infiles, (list, tuple)):
+            raise TypeError("'infiles' must be a string, or a list or tuple of strings")
+
+        if exec_msg is None:
+            exec_msg = "generating {} from {}".format(outfile, ', '.join(infiles))
+
+        # If 'outfile' must be regenerated (either because it doesn't
+        # exist, is out-of-date, or the 'force' flag is true) then
+        # perform the action that presumably regenerates it
+        if self.force or _modified.newer_group(infiles, outfile):
+            self.execute(func, args, exec_msg, level)
+        # Otherwise, print the "skip" message
+        else:
+            log.debug(skip_msg)

python/Lib/site-packages/setuptools/_distutils/core.py

@@ -0,0 +1,289 @@
+"""distutils.core
+
+The only module that needs to be imported to use the Distutils; provides
+the 'setup' function (which is to be called from the setup script).  Also
+indirectly provides the Distribution and Command classes, although they are
+really defined in distutils.dist and distutils.cmd.
+"""
+
+from __future__ import annotations
+
+import os
+import sys
+import tokenize
+from collections.abc import Iterable
+
+from .cmd import Command
+from .debug import DEBUG
+
+# Mainly import these so setup scripts can "from distutils.core import" them.
+from .dist import Distribution
+from .errors import (
+    CCompilerError,
+    DistutilsArgError,
+    DistutilsError,
+    DistutilsSetupError,
+)
+from .extension import Extension
+
+__all__ = ['Distribution', 'Command', 'Extension', 'setup']
+
+# This is a barebones help message generated displayed when the user
+# runs the setup script with no arguments at all.  More useful help
+# is generated with various --help options: global help, list commands,
+# and per-command help.
+USAGE = """\
+usage: %(script)s [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
+   or: %(script)s --help [cmd1 cmd2 ...]
+   or: %(script)s --help-commands
+   or: %(script)s cmd --help
+"""
+
+
+def gen_usage(script_name):
+    script = os.path.basename(script_name)
+    return USAGE % locals()
+
+
+# Some mild magic to control the behaviour of 'setup()' from 'run_setup()'.
+_setup_stop_after = None
+_setup_distribution = None
+
+# Legal keyword arguments for the setup() function
+setup_keywords = (
+    'distclass',
+    'script_name',
+    'script_args',
+    'options',
+    'name',
+    'version',
+    'author',
+    'author_email',
+    'maintainer',
+    'maintainer_email',
+    'url',
+    'license',
+    'description',
+    'long_description',
+    'keywords',
+    'platforms',
+    'classifiers',
+    'download_url',
+    'requires',
+    'provides',
+    'obsoletes',
+)
+
+# Legal keyword arguments for the Extension constructor
+extension_keywords = (
+    'name',
+    'sources',
+    'include_dirs',
+    'define_macros',
+    'undef_macros',
+    'library_dirs',
+    'libraries',
+    'runtime_library_dirs',
+    'extra_objects',
+    'extra_compile_args',
+    'extra_link_args',
+    'swig_opts',
+    'export_symbols',
+    'depends',
+    'language',
+)
+
+
+def setup(**attrs):  # noqa: C901
+    """The gateway to the Distutils: do everything your setup script needs
+    to do, in a highly flexible and user-driven way.  Briefly: create a
+    Distribution instance; find and parse config files; parse the command
+    line; run each Distutils command found there, customized by the options
+    supplied to 'setup()' (as keyword arguments), in config files, and on
+    the command line.
+
+    The Distribution instance might be an instance of a class supplied via
+    the 'distclass' keyword argument to 'setup'; if no such class is
+    supplied, then the Distribution class (in dist.py) is instantiated.
+    All other arguments to 'setup' (except for 'cmdclass') are used to set
+    attributes of the Distribution instance.
+
+    The 'cmdclass' argument, if supplied, is a dictionary mapping command
+    names to command classes.  Each command encountered on the command line
+    will be turned into a command class, which is in turn instantiated; any
+    class found in 'cmdclass' is used in place of the default, which is
+    (for command 'foo_bar') class 'foo_bar' in module
+    'distutils.command.foo_bar'.  The command class must provide a
+    'user_options' attribute which is a list of option specifiers for
+    'distutils.fancy_getopt'.  Any command-line options between the current
+    and the next command are used to set attributes of the current command
+    object.
+
+    When the entire command-line has been successfully parsed, calls the
+    'run()' method on each command object in turn.  This method will be
+    driven entirely by the Distribution object (which each command object
+    has a reference to, thanks to its constructor), and the
+    command-specific options that became attributes of each command
+    object.
+    """
+
+    global _setup_stop_after, _setup_distribution
+
+    # Determine the distribution class -- either caller-supplied or
+    # our Distribution (see below).
+    klass = attrs.get('distclass')
+    if klass:
+        attrs.pop('distclass')
+    else:
+        klass = Distribution
+
+    if 'script_name' not in attrs:
+        attrs['script_name'] = os.path.basename(sys.argv[0])
+    if 'script_args' not in attrs:
+        attrs['script_args'] = sys.argv[1:]
+
+    # Create the Distribution instance, using the remaining arguments
+    # (ie. everything except distclass) to initialize it
+    try:
+        _setup_distribution = dist = klass(attrs)
+    except DistutilsSetupError as msg:
+        if 'name' not in attrs:
+            raise SystemExit(f"error in setup command: {msg}")
+        else:
+            raise SystemExit("error in {} setup command: {}".format(attrs['name'], msg))
+
+    if _setup_stop_after == "init":
+        return dist
+
+    # Find and parse the config file(s): they will override options from
+    # the setup script, but be overridden by the command line.
+    dist.parse_config_files()
+
+    if DEBUG:
+        print("options (after parsing config files):")
+        dist.dump_option_dicts()
+
+    if _setup_stop_after == "config":
+        return dist
+
+    # Parse the command line and override config files; any
+    # command-line errors are the end user's fault, so turn them into
+    # SystemExit to suppress tracebacks.
+    try:
+        ok = dist.parse_command_line()
+    except DistutilsArgError as msg:
+        raise SystemExit(gen_usage(dist.script_name) + f"\nerror: {msg}")
+
+    if DEBUG:
+        print("options (after parsing command line):")
+        dist.dump_option_dicts()
+
+    if _setup_stop_after == "commandline":
+        return dist
+
+    # And finally, run all the commands found on the command line.
+    if ok:
+        return run_commands(dist)
+
+    return dist
+
+
+# setup ()
+
+
+def run_commands(dist):
+    """Given a Distribution object run all the commands,
+    raising ``SystemExit`` errors in the case of failure.
+
+    This function assumes that either ``sys.argv`` or ``dist.script_args``
+    is already set accordingly.
+    """
+    try:
+        dist.run_commands()
+    except KeyboardInterrupt:
+        raise SystemExit("interrupted")
+    except OSError as exc:
+        if DEBUG:
+            sys.stderr.write(f"error: {exc}\n")
+            raise
+        else:
+            raise SystemExit(f"error: {exc}")
+
+    except (DistutilsError, CCompilerError) as msg:
+        if DEBUG:
+            raise
+        else:
+            raise SystemExit("error: " + str(msg))
+
+    return dist
+
+
+def run_setup(script_name, script_args: Iterable[str] | None = None, stop_after="run"):
+    """Run a setup script in a somewhat controlled environment, and
+    return the Distribution instance that drives things.  This is useful
+    if you need to find out the distribution meta-data (passed as
+    keyword args from 'script' to 'setup()', or the contents of the
+    config files or command-line.
+
+    'script_name' is a file that will be read and run with 'exec()';
+    'sys.argv[0]' will be replaced with 'script' for the duration of the
+    call.  'script_args' is a list of strings; if supplied,
+    'sys.argv[1:]' will be replaced by 'script_args' for the duration of
+    the call.
+
+    'stop_after' tells 'setup()' when to stop processing; possible
+    values:
+      init
+        stop after the Distribution instance has been created and
+        populated with the keyword arguments to 'setup()'
+      config
+        stop after config files have been parsed (and their data
+        stored in the Distribution instance)
+      commandline
+        stop after the command-line ('sys.argv[1:]' or 'script_args')
+        have been parsed (and the data stored in the Distribution)
+      run [default]
+        stop after all commands have been run (the same as if 'setup()'
+        had been called in the usual way
+
+    Returns the Distribution instance, which provides all information
+    used to drive the Distutils.
+    """
+    if stop_after not in ('init', 'config', 'commandline', 'run'):
+        raise ValueError(f"invalid value for 'stop_after': {stop_after!r}")
+
+    global _setup_stop_after, _setup_distribution
+    _setup_stop_after = stop_after
+
+    save_argv = sys.argv.copy()
+    g = {'__file__': script_name, '__name__': '__main__'}
+    try:
+        try:
+            sys.argv[0] = script_name
+            if script_args is not None:
+                sys.argv[1:] = script_args
+            # tokenize.open supports automatic encoding detection
+            with tokenize.open(script_name) as f:
+                code = f.read().replace(r'\r\n', r'\n')
+                exec(code, g)
+        finally:
+            sys.argv = save_argv
+            _setup_stop_after = None
+    except SystemExit:
+        # Hmm, should we do something if exiting with a non-zero code
+        # (ie. error)?
+        pass
+
+    if _setup_distribution is None:
+        raise RuntimeError(
+            "'distutils.core.setup()' was never called -- "
+            f"perhaps '{script_name}' is not a Distutils setup script?"
+        )
+
+    # I wonder if the setup script's namespace -- g and l -- would be of
+    # any interest to callers?
+    # print "_setup_distribution:", _setup_distribution
+    return _setup_distribution
+
+
+# run_setup ()

python/Lib/site-packages/setuptools/_distutils/cygwinccompiler.py

@@ -0,0 +1,31 @@
+from .compilers.C import cygwin
+from .compilers.C.cygwin import (
+    CONFIG_H_NOTOK,
+    CONFIG_H_OK,
+    CONFIG_H_UNCERTAIN,
+    check_config_h,
+    get_msvcr,
+    is_cygwincc,
+)
+
+__all__ = [
+    'CONFIG_H_NOTOK',
+    'CONFIG_H_OK',
+    'CONFIG_H_UNCERTAIN',
+    'CygwinCCompiler',
+    'Mingw32CCompiler',
+    'check_config_h',
+    'get_msvcr',
+    'is_cygwincc',
+]
+
+
+CygwinCCompiler = cygwin.Compiler
+Mingw32CCompiler = cygwin.MinGW32Compiler
+
+
+get_versions = None
+"""
+A stand-in for the previous get_versions() function to prevent failures
+when monkeypatched. See pypa/setuptools#2969.
+"""

python/Lib/site-packages/setuptools/_distutils/debug.py

@@ -0,0 +1,5 @@
+import os
+
+# If DISTUTILS_DEBUG is anything other than the empty string, we run in
+# debug mode.
+DEBUG = os.environ.get('DISTUTILS_DEBUG')

python/Lib/site-packages/setuptools/_distutils/dep_util.py

@@ -0,0 +1,14 @@
+import warnings
+
+from . import _modified
+
+
+def __getattr__(name):
+    if name not in ['newer', 'newer_group', 'newer_pairwise']:
+        raise AttributeError(name)
+    warnings.warn(
+        "dep_util is Deprecated. Use functions from setuptools instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return getattr(_modified, name)

python/Lib/site-packages/setuptools/_distutils/dir_util.py

@@ -0,0 +1,232 @@
+"""distutils.dir_util
+
+Utility functions for manipulating directories and directory trees."""
+
+import functools
+import itertools
+import os
+import pathlib
+
+from . import file_util
+from ._log import log
+from .errors import DistutilsFileError, DistutilsInternalError
+
+
+class SkipRepeatAbsolutePaths(set):
+    """
+    Cache for mkpath.
+
+    In addition to cheapening redundant calls, eliminates redundant
+    "creating /foo/bar/baz" messages in dry-run mode.
+    """
+
+    def __init__(self):
+        SkipRepeatAbsolutePaths.instance = self
+
+    @classmethod
+    def clear(cls):
+        super(cls, cls.instance).clear()
+
+    def wrap(self, func):
+        @functools.wraps(func)
+        def wrapper(path, *args, **kwargs):
+            if path.absolute() in self:
+                return
+            result = func(path, *args, **kwargs)
+            self.add(path.absolute())
+            return result
+
+        return wrapper
+
+
+# Python 3.8 compatibility
+wrapper = SkipRepeatAbsolutePaths().wrap
+
+
+@functools.singledispatch
+@wrapper
+def mkpath(name: pathlib.Path, mode=0o777, verbose=True) -> None:
+    """Create a directory and any missing ancestor directories.
+
+    If the directory already exists (or if 'name' is the empty string, which
+    means the current directory, which of course exists), then do nothing.
+    Raise DistutilsFileError if unable to create some directory along the way
+    (eg. some sub-path exists, but is a file rather than a directory).
+    If 'verbose' is true, log the directory created.
+    """
+    if verbose and not name.is_dir():
+        log.info("creating %s", name)
+
+    try:
+        name.mkdir(mode=mode, parents=True, exist_ok=True)
+    except OSError as exc:
+        raise DistutilsFileError(f"could not create '{name}': {exc.args[-1]}")
+
+
+@mkpath.register
+def _(name: str, *args, **kwargs):
+    return mkpath(pathlib.Path(name), *args, **kwargs)
+
+
+@mkpath.register
+def _(name: None, *args, **kwargs):
+    """
+    Detect a common bug -- name is None.
+    """
+    raise DistutilsInternalError(f"mkpath: 'name' must be a string (got {name!r})")
+
+
+def create_tree(base_dir, files, mode=0o777, verbose=True):
+    """Create all the empty directories under 'base_dir' needed to put 'files'
+    there.
+
+    'base_dir' is just the name of a directory which doesn't necessarily
+    exist yet; 'files' is a list of filenames to be interpreted relative to
+    'base_dir'.  'base_dir' + the directory portion of every file in 'files'
+    will be created if it doesn't already exist.  'mode' and 'verbose'
+    flags are as for 'mkpath()'.
+    """
+    # First get the list of directories to create
+    need_dir = set(os.path.join(base_dir, os.path.dirname(file)) for file in files)
+
+    # Now create them
+    for dir in sorted(need_dir):
+        mkpath(dir, mode, verbose=verbose)
+
+
+def copy_tree(
+    src,
+    dst,
+    preserve_mode=True,
+    preserve_times=True,
+    preserve_symlinks=False,
+    update=False,
+    verbose=True,
+):
+    """Copy an entire directory tree 'src' to a new location 'dst'.
+
+    Both 'src' and 'dst' must be directory names.  If 'src' is not a
+    directory, raise DistutilsFileError.  If 'dst' does not exist, it is
+    created with 'mkpath()'.  The end result of the copy is that every
+    file in 'src' is copied to 'dst', and directories under 'src' are
+    recursively copied to 'dst'.  Return the list of files that were
+    copied or might have been copied, using their output name.  The
+    return value is unaffected by 'update': it is simply
+    the list of all files under 'src', with the names changed to be
+    under 'dst'.
+
+    'preserve_mode' and 'preserve_times' are the same as for
+    'copy_file'; note that they only apply to regular files, not to
+    directories.  If 'preserve_symlinks' is true, symlinks will be
+    copied as symlinks (on platforms that support them!); otherwise
+    (the default), the destination of the symlink will be copied.
+    'update' and 'verbose' are the same as for 'copy_file'.
+    """
+    if not os.path.isdir(src):
+        raise DistutilsFileError(f"cannot copy tree '{src}': not a directory")
+    try:
+        names = os.listdir(src)
+    except OSError as e:
+        raise DistutilsFileError(f"error listing files in '{src}': {e.strerror}")
+
+    mkpath(dst, verbose=verbose)
+
+    copy_one = functools.partial(
+        _copy_one,
+        src=src,
+        dst=dst,
+        preserve_symlinks=preserve_symlinks,
+        verbose=verbose,
+        preserve_mode=preserve_mode,
+        preserve_times=preserve_times,
+        update=update,
+    )
+    return list(itertools.chain.from_iterable(map(copy_one, names)))
+
+
+def _copy_one(
+    name,
+    *,
+    src,
+    dst,
+    preserve_symlinks,
+    verbose,
+    preserve_mode,
+    preserve_times,
+    update,
+):
+    src_name = os.path.join(src, name)
+    dst_name = os.path.join(dst, name)
+
+    if name.startswith('.nfs'):
+        # skip NFS rename files
+        return
+
+    if preserve_symlinks and os.path.islink(src_name):
+        link_dest = os.readlink(src_name)
+        if verbose >= 1:
+            log.info("linking %s -> %s", dst_name, link_dest)
+        os.symlink(link_dest, dst_name)
+        yield dst_name
+
+    elif os.path.isdir(src_name):
+        yield from copy_tree(
+            src_name,
+            dst_name,
+            preserve_mode,
+            preserve_times,
+            preserve_symlinks,
+            update,
+            verbose=verbose,
+        )
+    else:
+        file_util.copy_file(
+            src_name,
+            dst_name,
+            preserve_mode,
+            preserve_times,
+            update,
+            verbose=verbose,
+        )
+        yield dst_name
+
+
+def _build_cmdtuple(path, cmdtuples):
+    """Helper for remove_tree()."""
+    for f in os.listdir(path):
+        real_f = os.path.join(path, f)
+        if os.path.isdir(real_f) and not os.path.islink(real_f):
+            _build_cmdtuple(real_f, cmdtuples)
+        else:
+            cmdtuples.append((os.remove, real_f))
+    cmdtuples.append((os.rmdir, path))
+
+
+def remove_tree(directory, verbose=True):
+    """Recursively remove an entire directory tree.
+
+    Any errors are ignored (apart from being reported to stdout if 'verbose'
+    is true).
+    """
+    if verbose >= 1:
+        log.info("removing '%s' (and everything under it)", directory)
+    cmdtuples = []
+    _build_cmdtuple(directory, cmdtuples)
+    for cmd in cmdtuples:
+        try:
+            cmd[0](cmd[1])
+            # Clear the cache
+            SkipRepeatAbsolutePaths.clear()
+        except OSError as exc:
+            log.warning("error removing %s: %s", directory, exc)
+
+
+def ensure_relative(path):
+    """Take the full path 'path', and make it a relative path.
+
+    This is useful to make 'path' the second argument to os.path.join().
+    """
+    drive, path = os.path.splitdrive(path)
+    if path[0:1] == os.sep:
+        path = drive + path[1:]
+    return path

python/Lib/site-packages/setuptools/_distutils/dist.py

@@ -0,0 +1,1384 @@
+"""distutils.dist
+
+Provides the Distribution class, which represents the module distribution
+being built/installed/distributed.
+"""
+
+from __future__ import annotations
+
+import contextlib
+import logging
+import os
+import pathlib
+import re
+import sys
+import warnings
+from collections.abc import Iterable, MutableMapping
+from email import message_from_file
+from typing import (
+    IO,
+    TYPE_CHECKING,
+    Any,
+    ClassVar,
+    Literal,
+    TypeVar,
+    Union,
+    overload,
+)
+
+from packaging.utils import canonicalize_name, canonicalize_version
+
+from ._log import log
+from .debug import DEBUG
+from .errors import (
+    DistutilsArgError,
+    DistutilsClassError,
+    DistutilsModuleError,
+    DistutilsOptionError,
+)
+from .fancy_getopt import FancyGetopt, translate_longopt
+from .util import check_environ, rfc822_escape, strtobool
+
+if TYPE_CHECKING:
+    from _typeshed import SupportsWrite
+    from typing_extensions import TypeAlias
+
+    # type-only import because of mutual dependence between these modules
+    from .cmd import Command
+
+_CommandT = TypeVar("_CommandT", bound="Command")
+_OptionsList: TypeAlias = list[
+    Union[tuple[str, Union[str, None], str, int], tuple[str, Union[str, None], str]]
+]
+
+
+# Regex to define acceptable Distutils command names.  This is not *quite*
+# the same as a Python NAME -- I don't allow leading underscores.  The fact
+# that they're very similar is no coincidence; the default naming scheme is
+# to look for a Python module named after the command.
+command_re = re.compile(r'^[a-zA-Z]([a-zA-Z0-9_]*)$')
+
+
+def _ensure_list(value: str | Iterable[str], fieldname) -> str | list[str]:
+    if isinstance(value, str):
+        # a string containing comma separated values is okay.  It will
+        # be converted to a list by Distribution.finalize_options().
+        pass
+    elif not isinstance(value, list):
+        # passing a tuple or an iterator perhaps, warn and convert
+        typename = type(value).__name__
+        msg = "Warning: '{fieldname}' should be a list, got type '{typename}'"
+        msg = msg.format(**locals())
+        log.warning(msg)
+        value = list(value)
+    return value
+
+
+class Distribution:
+    """The core of the Distutils.  Most of the work hiding behind 'setup'
+    is really done within a Distribution instance, which farms the work out
+    to the Distutils commands specified on the command line.
+
+    Setup scripts will almost never instantiate Distribution directly,
+    unless the 'setup()' function is totally inadequate to their needs.
+    However, it is conceivable that a setup script might wish to subclass
+    Distribution for some specialized purpose, and then pass the subclass
+    to 'setup()' as the 'distclass' keyword argument.  If so, it is
+    necessary to respect the expectations that 'setup' has of Distribution.
+    See the code for 'setup()', in core.py, for details.
+    """
+
+    # 'global_options' describes the command-line options that may be
+    # supplied to the setup script prior to any actual commands.
+    # Eg. "./setup.py -n" or "./setup.py --quiet" both take advantage of
+    # these global options.  This list should be kept to a bare minimum,
+    # since every global option is also valid as a command option -- and we
+    # don't want to pollute the commands with too many options that they
+    # have minimal control over.
+    # The fourth entry for verbose means that it can be repeated.
+    global_options: ClassVar[_OptionsList] = [
+        ('verbose', 'v', "run verbosely (default)", 1),
+        ('quiet', 'q', "run quietly (turns verbosity off)"),
+        ('help', 'h', "show detailed help message"),
+        ('no-user-cfg', None, 'ignore pydistutils.cfg in your home directory'),
+    ]
+
+    # 'common_usage' is a short (2-3 line) string describing the common
+    # usage of the setup script.
+    common_usage: ClassVar[str] = """\
+Common commands: (see '--help-commands' for more)
+
+  setup.py build      will build the package underneath 'build/'
+  setup.py install    will install the package
+"""
+
+    # options that are not propagated to the commands
+    display_options: ClassVar[_OptionsList] = [
+        ('help-commands', None, "list all available commands"),
+        ('name', None, "print package name"),
+        ('version', 'V', "print package version"),
+        ('fullname', None, "print <package name>-<version>"),
+        ('author', None, "print the author's name"),
+        ('author-email', None, "print the author's email address"),
+        ('maintainer', None, "print the maintainer's name"),
+        ('maintainer-email', None, "print the maintainer's email address"),
+        ('contact', None, "print the maintainer's name if known, else the author's"),
+        (
+            'contact-email',
+            None,
+            "print the maintainer's email address if known, else the author's",
+        ),
+        ('url', None, "print the URL for this package"),
+        ('license', None, "print the license of the package"),
+        ('licence', None, "alias for --license"),
+        ('description', None, "print the package description"),
+        ('long-description', None, "print the long package description"),
+        ('platforms', None, "print the list of platforms"),
+        ('classifiers', None, "print the list of classifiers"),
+        ('keywords', None, "print the list of keywords"),
+        ('provides', None, "print the list of packages/modules provided"),
+        ('requires', None, "print the list of packages/modules required"),
+        ('obsoletes', None, "print the list of packages/modules made obsolete"),
+    ]
+    display_option_names: ClassVar[list[str]] = [
+        translate_longopt(x[0]) for x in display_options
+    ]
+
+    # negative options are options that exclude other options
+    negative_opt: ClassVar[dict[str, str]] = {'quiet': 'verbose'}
+
+    # -- Creation/initialization methods -------------------------------
+
+    # Can't Unpack a TypedDict with optional properties, so using Any instead
+    def __init__(self, attrs: MutableMapping[str, Any] | None = None) -> None:  # noqa: C901
+        """Construct a new Distribution instance: initialize all the
+        attributes of a Distribution, and then use 'attrs' (a dictionary
+        mapping attribute names to values) to assign some of those
+        attributes their "real" values.  (Any attributes not mentioned in
+        'attrs' will be assigned to some null value: 0, None, an empty list
+        or dictionary, etc.)  Most importantly, initialize the
+        'command_obj' attribute to the empty dictionary; this will be
+        filled in with real command objects by 'parse_command_line()'.
+        """
+
+        # Default values for our command-line options
+        self.verbose = True
+        self.help = False
+        for attr in self.display_option_names:
+            setattr(self, attr, False)
+
+        # Store the distribution meta-data (name, version, author, and so
+        # forth) in a separate object -- we're getting to have enough
+        # information here (and enough command-line options) that it's
+        # worth it.  Also delegate 'get_XXX()' methods to the 'metadata'
+        # object in a sneaky and underhanded (but efficient!) way.
+        self.metadata = DistributionMetadata()
+        for basename in self.metadata._METHOD_BASENAMES:
+            method_name = "get_" + basename
+            setattr(self, method_name, getattr(self.metadata, method_name))
+
+        # 'cmdclass' maps command names to class objects, so we
+        # can 1) quickly figure out which class to instantiate when
+        # we need to create a new command object, and 2) have a way
+        # for the setup script to override command classes
+        self.cmdclass: dict[str, type[Command]] = {}
+
+        # 'command_packages' is a list of packages in which commands
+        # are searched for.  The factory for command 'foo' is expected
+        # to be named 'foo' in the module 'foo' in one of the packages
+        # named here.  This list is searched from the left; an error
+        # is raised if no named package provides the command being
+        # searched for.  (Always access using get_command_packages().)
+        self.command_packages: str | list[str] | None = None
+
+        # 'script_name' and 'script_args' are usually set to sys.argv[0]
+        # and sys.argv[1:], but they can be overridden when the caller is
+        # not necessarily a setup script run from the command-line.
+        self.script_name: str | os.PathLike[str] | None = None
+        self.script_args: list[str] | None = None
+
+        # 'command_options' is where we store command options between
+        # parsing them (from config files, the command-line, etc.) and when
+        # they are actually needed -- ie. when the command in question is
+        # instantiated.  It is a dictionary of dictionaries of 2-tuples:
+        #   command_options = { command_name : { option : (source, value) } }
+        self.command_options: dict[str, dict[str, tuple[str, str]]] = {}
+
+        # 'dist_files' is the list of (command, pyversion, file) that
+        # have been created by any dist commands run so far. This is
+        # filled regardless of whether the run is dry or not. pyversion
+        # gives sysconfig.get_python_version() if the dist file is
+        # specific to a Python version, 'any' if it is good for all
+        # Python versions on the target platform, and '' for a source
+        # file. pyversion should not be used to specify minimum or
+        # maximum required Python versions; use the metainfo for that
+        # instead.
+        self.dist_files: list[tuple[str, str, str]] = []
+
+        # These options are really the business of various commands, rather
+        # than of the Distribution itself.  We provide aliases for them in
+        # Distribution as a convenience to the developer.
+        self.packages = None
+        self.package_data: dict[str, list[str]] = {}
+        self.package_dir = None
+        self.py_modules = None
+        self.libraries = None
+        self.headers = None
+        self.ext_modules = None
+        self.ext_package = None
+        self.include_dirs = None
+        self.extra_path = None
+        self.scripts = None
+        self.data_files = None
+        self.password = ''
+
+        # And now initialize bookkeeping stuff that can't be supplied by
+        # the caller at all.  'command_obj' maps command names to
+        # Command instances -- that's how we enforce that every command
+        # class is a singleton.
+        self.command_obj: dict[str, Command] = {}
+
+        # 'have_run' maps command names to boolean values; it keeps track
+        # of whether we have actually run a particular command, to make it
+        # cheap to "run" a command whenever we think we might need to -- if
+        # it's already been done, no need for expensive filesystem
+        # operations, we just check the 'have_run' dictionary and carry on.
+        # It's only safe to query 'have_run' for a command class that has
+        # been instantiated -- a false value will be inserted when the
+        # command object is created, and replaced with a true value when
+        # the command is successfully run.  Thus it's probably best to use
+        # '.get()' rather than a straight lookup.
+        self.have_run: dict[str, bool] = {}
+
+        # Now we'll use the attrs dictionary (ultimately, keyword args from
+        # the setup script) to possibly override any or all of these
+        # distribution options.
+
+        if attrs:
+            # Pull out the set of command options and work on them
+            # specifically.  Note that this order guarantees that aliased
+            # command options will override any supplied redundantly
+            # through the general options dictionary.
+            options = attrs.get('options')
+            if options is not None:
+                del attrs['options']
+                for command, cmd_options in options.items():
+                    opt_dict = self.get_option_dict(command)
+                    for opt, val in cmd_options.items():
+                        opt_dict[opt] = ("setup script", val)
+
+            if 'licence' in attrs:
+                attrs['license'] = attrs['licence']
+                del attrs['licence']
+                msg = "'licence' distribution option is deprecated; use 'license'"
+                warnings.warn(msg)
+
+            # Now work on the rest of the attributes.  Any attribute that's
+            # not already defined is invalid!
+            for key, val in attrs.items():
+                if hasattr(self.metadata, "set_" + key):
+                    getattr(self.metadata, "set_" + key)(val)
+                elif hasattr(self.metadata, key):
+                    setattr(self.metadata, key, val)
+                elif hasattr(self, key):
+                    setattr(self, key, val)
+                else:
+                    msg = f"Unknown distribution option: {key!r}"
+                    warnings.warn(msg)
+
+        # no-user-cfg is handled before other command line args
+        # because other args override the config files, and this
+        # one is needed before we can load the config files.
+        # If attrs['script_args'] wasn't passed, assume false.
+        #
+        # This also make sure we just look at the global options
+        self.want_user_cfg = True
+
+        if self.script_args is not None:
+            # Coerce any possible iterable from attrs into a list
+            self.script_args = list(self.script_args)
+            for arg in self.script_args:
+                if not arg.startswith('-'):
+                    break
+                if arg == '--no-user-cfg':
+                    self.want_user_cfg = False
+                    break
+
+        self.finalize_options()
+
+    def get_option_dict(self, command):
+        """Get the option dictionary for a given command.  If that
+        command's option dictionary hasn't been created yet, then create it
+        and return the new dictionary; otherwise, return the existing
+        option dictionary.
+        """
+        dict = self.command_options.get(command)
+        if dict is None:
+            dict = self.command_options[command] = {}
+        return dict
+
+    def dump_option_dicts(self, header=None, commands=None, indent: str = "") -> None:
+        from pprint import pformat
+
+        if commands is None:  # dump all command option dicts
+            commands = sorted(self.command_options.keys())
+
+        if header is not None:
+            self.announce(indent + header)
+            indent = indent + "  "
+
+        if not commands:
+            self.announce(indent + "no commands known yet")
+            return
+
+        for cmd_name in commands:
+            opt_dict = self.command_options.get(cmd_name)
+            if opt_dict is None:
+                self.announce(indent + f"no option dict for '{cmd_name}' command")
+            else:
+                self.announce(indent + f"option dict for '{cmd_name}' command:")
+                out = pformat(opt_dict)
+                for line in out.split('\n'):
+                    self.announce(indent + "  " + line)
+
+    # -- Config file finding/parsing methods ---------------------------
+
+    def find_config_files(self):
+        """Find as many configuration files as should be processed for this
+        platform, and return a list of filenames in the order in which they
+        should be parsed.  The filenames returned are guaranteed to exist
+        (modulo nasty race conditions).
+
+        There are multiple possible config files:
+        - distutils.cfg in the Distutils installation directory (i.e.
+          where the top-level Distutils __inst__.py file lives)
+        - a file in the user's home directory named .pydistutils.cfg
+          on Unix and pydistutils.cfg on Windows/Mac; may be disabled
+          with the ``--no-user-cfg`` option
+        - setup.cfg in the current directory
+        - a file named by an environment variable
+        """
+        check_environ()
+        files = [str(path) for path in self._gen_paths() if os.path.isfile(path)]
+
+        if DEBUG:
+            self.announce("using config files: {}".format(', '.join(files)))
+
+        return files
+
+    def _gen_paths(self):
+        # The system-wide Distutils config file
+        sys_dir = pathlib.Path(sys.modules['distutils'].__file__).parent
+        yield sys_dir / "distutils.cfg"
+
+        # The per-user config file
+        prefix = '.' * (os.name == 'posix')
+        filename = prefix + 'pydistutils.cfg'
+        if self.want_user_cfg:
+            with contextlib.suppress(RuntimeError):
+                yield pathlib.Path('~').expanduser() / filename
+
+        # All platforms support local setup.cfg
+        yield pathlib.Path('setup.cfg')
+
+        # Additional config indicated in the environment
+        with contextlib.suppress(TypeError):
+            yield pathlib.Path(os.getenv("DIST_EXTRA_CONFIG"))
+
+    def parse_config_files(self, filenames=None):  # noqa: C901
+        from configparser import ConfigParser
+
+        # Ignore install directory options if we have a venv
+        if sys.prefix != sys.base_prefix:
+            ignore_options = [
+                'install-base',
+                'install-platbase',
+                'install-lib',
+                'install-platlib',
+                'install-purelib',
+                'install-headers',
+                'install-scripts',
+                'install-data',
+                'prefix',
+                'exec-prefix',
+                'home',
+                'user',
+                'root',
+            ]
+        else:
+            ignore_options = []
+
+        ignore_options = frozenset(ignore_options)
+
+        if filenames is None:
+            filenames = self.find_config_files()
+
+        if DEBUG:
+            self.announce("Distribution.parse_config_files():")
+
+        parser = ConfigParser()
+        for filename in filenames:
+            if DEBUG:
+                self.announce(f"  reading {filename}")
+            parser.read(filename, encoding='utf-8')
+            for section in parser.sections():
+                options = parser.options(section)
+                opt_dict = self.get_option_dict(section)
+
+                for opt in options:
+                    if opt != '__name__' and opt not in ignore_options:
+                        val = parser.get(section, opt)
+                        opt = opt.replace('-', '_')
+                        opt_dict[opt] = (filename, val)
+
+            # Make the ConfigParser forget everything (so we retain
+            # the original filenames that options come from)
+            parser.__init__()
+
+        # If there was a "global" section in the config file, use it
+        # to set Distribution options.
+
+        if 'global' in self.command_options:
+            for opt, (_src, val) in self.command_options['global'].items():
+                alias = self.negative_opt.get(opt)
+                try:
+                    if alias:
+                        setattr(self, alias, not strtobool(val))
+                    elif opt in ('verbose',):  # ugh!
+                        setattr(self, opt, strtobool(val))
+                    else:
+                        setattr(self, opt, val)
+                except ValueError as msg:
+                    raise DistutilsOptionError(msg)
+
+    # -- Command-line parsing methods ----------------------------------
+
+    def parse_command_line(self):
+        """Parse the setup script's command line, taken from the
+        'script_args' instance attribute (which defaults to 'sys.argv[1:]'
+        -- see 'setup()' in core.py).  This list is first processed for
+        "global options" -- options that set attributes of the Distribution
+        instance.  Then, it is alternately scanned for Distutils commands
+        and options for that command.  Each new command terminates the
+        options for the previous command.  The allowed options for a
+        command are determined by the 'user_options' attribute of the
+        command class -- thus, we have to be able to load command classes
+        in order to parse the command line.  Any error in that 'options'
+        attribute raises DistutilsGetoptError; any error on the
+        command-line raises DistutilsArgError.  If no Distutils commands
+        were found on the command line, raises DistutilsArgError.  Return
+        true if command-line was successfully parsed and we should carry
+        on with executing commands; false if no errors but we shouldn't
+        execute commands (currently, this only happens if user asks for
+        help).
+        """
+        #
+        # We now have enough information to show the Macintosh dialog
+        # that allows the user to interactively specify the "command line".
+        #
+        toplevel_options = self._get_toplevel_options()
+
+        # We have to parse the command line a bit at a time -- global
+        # options, then the first command, then its options, and so on --
+        # because each command will be handled by a different class, and
+        # the options that are valid for a particular class aren't known
+        # until we have loaded the command class, which doesn't happen
+        # until we know what the command is.
+
+        self.commands = []
+        parser = FancyGetopt(toplevel_options + self.display_options)
+        parser.set_negative_aliases(self.negative_opt)
+        parser.set_aliases({'licence': 'license'})
+        args = parser.getopt(args=self.script_args, object=self)
+        option_order = parser.get_option_order()
+        logging.getLogger().setLevel(logging.WARN - 10 * self.verbose)
+
+        # for display options we return immediately
+        if self.handle_display_options(option_order):
+            return
+        while args:
+            args = self._parse_command_opts(parser, args)
+            if args is None:  # user asked for help (and got it)
+                return
+
+        # Handle the cases of --help as a "global" option, ie.
+        # "setup.py --help" and "setup.py --help command ...".  For the
+        # former, we show global options (--verbose, --dry-run, etc.)
+        # and display-only options (--name, --version, etc.); for the
+        # latter, we omit the display-only options and show help for
+        # each command listed on the command line.
+        if self.help:
+            self._show_help(
+                parser, display_options=len(self.commands) == 0, commands=self.commands
+            )
+            return
+
+        # Oops, no commands found -- an end-user error
+        if not self.commands:
+            raise DistutilsArgError("no commands supplied")
+
+        # All is well: return true
+        return True
+
+    def _get_toplevel_options(self):
+        """Return the non-display options recognized at the top level.
+
+        This includes options that are recognized *only* at the top
+        level as well as options recognized for commands.
+        """
+        return self.global_options + [
+            (
+                "command-packages=",
+                None,
+                "list of packages that provide distutils commands",
+            ),
+        ]
+
+    def _parse_command_opts(self, parser, args):  # noqa: C901
+        """Parse the command-line options for a single command.
+        'parser' must be a FancyGetopt instance; 'args' must be the list
+        of arguments, starting with the current command (whose options
+        we are about to parse).  Returns a new version of 'args' with
+        the next command at the front of the list; will be the empty
+        list if there are no more commands on the command line.  Returns
+        None if the user asked for help on this command.
+        """
+        # late import because of mutual dependence between these modules
+        from distutils.cmd import Command
+
+        # Pull the current command from the head of the command line
+        command = args[0]
+        if not command_re.match(command):
+            raise SystemExit(f"invalid command name '{command}'")
+        self.commands.append(command)
+
+        # Dig up the command class that implements this command, so we
+        # 1) know that it's a valid command, and 2) know which options
+        # it takes.
+        try:
+            cmd_class = self.get_command_class(command)
+        except DistutilsModuleError as msg:
+            raise DistutilsArgError(msg)
+
+        # Require that the command class be derived from Command -- want
+        # to be sure that the basic "command" interface is implemented.
+        if not issubclass(cmd_class, Command):
+            raise DistutilsClassError(
+                f"command class {cmd_class} must subclass Command"
+            )
+
+        # Also make sure that the command object provides a list of its
+        # known options.
+        if not (
+            hasattr(cmd_class, 'user_options')
+            and isinstance(cmd_class.user_options, list)
+        ):
+            msg = (
+                "command class %s must provide "
+                "'user_options' attribute (a list of tuples)"
+            )
+            raise DistutilsClassError(msg % cmd_class)
+
+        # If the command class has a list of negative alias options,
+        # merge it in with the global negative aliases.
+        negative_opt = self.negative_opt
+        if hasattr(cmd_class, 'negative_opt'):
+            negative_opt = negative_opt.copy()
+            negative_opt.update(cmd_class.negative_opt)
+
+        # Check for help_options in command class.  They have a different
+        # format (tuple of four) so we need to preprocess them here.
+        if hasattr(cmd_class, 'help_options') and isinstance(
+            cmd_class.help_options, list
+        ):
+            help_options = fix_help_options(cmd_class.help_options)
+        else:
+            help_options = []
+
+        # All commands support the global options too, just by adding
+        # in 'global_options'.
+        parser.set_option_table(
+            self.global_options + cmd_class.user_options + help_options
+        )
+        parser.set_negative_aliases(negative_opt)
+        (args, opts) = parser.getopt(args[1:])
+        if hasattr(opts, 'help') and opts.help:
+            self._show_help(parser, display_options=False, commands=[cmd_class])
+            return
+
+        if hasattr(cmd_class, 'help_options') and isinstance(
+            cmd_class.help_options, list
+        ):
+            help_option_found = 0
+            for help_option, _short, _desc, func in cmd_class.help_options:
+                if hasattr(opts, parser.get_attr_name(help_option)):
+                    help_option_found = 1
+                    if callable(func):
+                        func()
+                    else:
+                        raise DistutilsClassError(
+                            f"invalid help function {func!r} for help option '{help_option}': "
+                            "must be a callable object (function, etc.)"
+                        )
+
+            if help_option_found:
+                return
+
+        # Put the options from the command-line into their official
+        # holding pen, the 'command_options' dictionary.
+        opt_dict = self.get_option_dict(command)
+        for name, value in vars(opts).items():
+            opt_dict[name] = ("command line", value)
+
+        return args
+
+    def finalize_options(self) -> None:
+        """Set final values for all the options on the Distribution
+        instance, analogous to the .finalize_options() method of Command
+        objects.
+        """
+        for attr in ('keywords', 'platforms'):
+            value = getattr(self.metadata, attr)
+            if value is None:
+                continue
+            if isinstance(value, str):
+                value = [elm.strip() for elm in value.split(',')]
+                setattr(self.metadata, attr, value)
+
+    def _show_help(
+        self, parser, global_options=True, display_options=True, commands: Iterable = ()
+    ):
+        """Show help for the setup script command-line in the form of
+        several lists of command-line options.  'parser' should be a
+        FancyGetopt instance; do not expect it to be returned in the
+        same state, as its option table will be reset to make it
+        generate the correct help text.
+
+        If 'global_options' is true, lists the global options:
+        --verbose, --dry-run, etc.  If 'display_options' is true, lists
+        the "display-only" options: --name, --version, etc.  Finally,
+        lists per-command help for every command name or command class
+        in 'commands'.
+        """
+        # late import because of mutual dependence between these modules
+        from distutils.cmd import Command
+        from distutils.core import gen_usage
+
+        if global_options:
+            if display_options:
+                options = self._get_toplevel_options()
+            else:
+                options = self.global_options
+            parser.set_option_table(options)
+            parser.print_help(self.common_usage + "\nGlobal options:")
+            print()
+
+        if display_options:
+            parser.set_option_table(self.display_options)
+            parser.print_help(
+                "Information display options (just display information, ignore any commands)"
+            )
+            print()
+
+        for command in commands:
+            if isinstance(command, type) and issubclass(command, Command):
+                klass = command
+            else:
+                klass = self.get_command_class(command)
+            if hasattr(klass, 'help_options') and isinstance(klass.help_options, list):
+                parser.set_option_table(
+                    klass.user_options + fix_help_options(klass.help_options)
+                )
+            else:
+                parser.set_option_table(klass.user_options)
+            parser.print_help(f"Options for '{klass.__name__}' command:")
+            print()
+
+        print(gen_usage(self.script_name))
+
+    def handle_display_options(self, option_order):
+        """If there were any non-global "display-only" options
+        (--help-commands or the metadata display options) on the command
+        line, display the requested info and return true; else return
+        false.
+        """
+        from distutils.core import gen_usage
+
+        # User just wants a list of commands -- we'll print it out and stop
+        # processing now (ie. if they ran "setup --help-commands foo bar",
+        # we ignore "foo bar").
+        if self.help_commands:
+            self.print_commands()
+            print()
+            print(gen_usage(self.script_name))
+            return 1
+
+        # If user supplied any of the "display metadata" options, then
+        # display that metadata in the order in which the user supplied the
+        # metadata options.
+        any_display_options = 0
+        is_display_option = set()
+        for option in self.display_options:
+            is_display_option.add(option[0])
+
+        for opt, val in option_order:
+            if val and opt in is_display_option:
+                opt = translate_longopt(opt)
+                value = getattr(self.metadata, "get_" + opt)()
+                if opt in ('keywords', 'platforms'):
+                    print(','.join(value))
+                elif opt in ('classifiers', 'provides', 'requires', 'obsoletes'):
+                    print('\n'.join(value))
+                else:
+                    print(value)
+                any_display_options = 1
+
+        return any_display_options
+
+    def print_command_list(self, commands, header, max_length) -> None:
+        """Print a subset of the list of all commands -- used by
+        'print_commands()'.
+        """
+        print(header + ":")
+
+        for cmd in commands:
+            klass = self.cmdclass.get(cmd)
+            if not klass:
+                klass = self.get_command_class(cmd)
+            try:
+                description = klass.description
+            except AttributeError:
+                description = "(no description available)"
+
+            print(f"  {cmd:<{max_length}}  {description}")
+
+    def print_commands(self) -> None:
+        """Print out a help message listing all available commands with a
+        description of each.  The list is divided into "standard commands"
+        (listed in distutils.command.__all__) and "extra commands"
+        (mentioned in self.cmdclass, but not a standard command).  The
+        descriptions come from the command class attribute
+        'description'.
+        """
+        import distutils.command
+
+        std_commands = distutils.command.__all__
+        is_std = set(std_commands)
+
+        extra_commands = [cmd for cmd in self.cmdclass.keys() if cmd not in is_std]
+
+        max_length = 0
+        for cmd in std_commands + extra_commands:
+            if len(cmd) > max_length:
+                max_length = len(cmd)
+
+        self.print_command_list(std_commands, "Standard commands", max_length)
+        if extra_commands:
+            print()
+            self.print_command_list(extra_commands, "Extra commands", max_length)
+
+    def get_command_list(self):
+        """Get a list of (command, description) tuples.
+        The list is divided into "standard commands" (listed in
+        distutils.command.__all__) and "extra commands" (mentioned in
+        self.cmdclass, but not a standard command).  The descriptions come
+        from the command class attribute 'description'.
+        """
+        # Currently this is only used on Mac OS, for the Mac-only GUI
+        # Distutils interface (by Jack Jansen)
+        import distutils.command
+
+        std_commands = distutils.command.__all__
+        is_std = set(std_commands)
+
+        extra_commands = [cmd for cmd in self.cmdclass.keys() if cmd not in is_std]
+
+        rv = []
+        for cmd in std_commands + extra_commands:
+            klass = self.cmdclass.get(cmd)
+            if not klass:
+                klass = self.get_command_class(cmd)
+            try:
+                description = klass.description
+            except AttributeError:
+                description = "(no description available)"
+            rv.append((cmd, description))
+        return rv
+
+    # -- Command class/object methods ----------------------------------
+
+    def get_command_packages(self):
+        """Return a list of packages from which commands are loaded."""
+        pkgs = self.command_packages
+        if not isinstance(pkgs, list):
+            if pkgs is None:
+                pkgs = ''
+            pkgs = [pkg.strip() for pkg in pkgs.split(',') if pkg != '']
+            if "distutils.command" not in pkgs:
+                pkgs.insert(0, "distutils.command")
+            self.command_packages = pkgs
+        return pkgs
+
+    def get_command_class(self, command: str) -> type[Command]:
+        """Return the class that implements the Distutils command named by
+        'command'.  First we check the 'cmdclass' dictionary; if the
+        command is mentioned there, we fetch the class object from the
+        dictionary and return it.  Otherwise we load the command module
+        ("distutils.command." + command) and fetch the command class from
+        the module.  The loaded class is also stored in 'cmdclass'
+        to speed future calls to 'get_command_class()'.
+
+        Raises DistutilsModuleError if the expected module could not be
+        found, or if that module does not define the expected class.
+        """
+        klass = self.cmdclass.get(command)
+        if klass:
+            return klass
+
+        for pkgname in self.get_command_packages():
+            module_name = f"{pkgname}.{command}"
+            klass_name = command
+
+            try:
+                __import__(module_name)
+                module = sys.modules[module_name]
+            except ImportError:
+                continue
+
+            try:
+                klass = getattr(module, klass_name)
+            except AttributeError:
+                raise DistutilsModuleError(
+                    f"invalid command '{command}' (no class '{klass_name}' in module '{module_name}')"
+                )
+
+            self.cmdclass[command] = klass
+            return klass
+
+        raise DistutilsModuleError(f"invalid command '{command}'")
+
+    @overload
+    def get_command_obj(
+        self, command: str, create: Literal[True] = True
+    ) -> Command: ...
+    @overload
+    def get_command_obj(
+        self, command: str, create: Literal[False]
+    ) -> Command | None: ...
+    def get_command_obj(self, command: str, create: bool = True) -> Command | None:
+        """Return the command object for 'command'.  Normally this object
+        is cached on a previous call to 'get_command_obj()'; if no command
+        object for 'command' is in the cache, then we either create and
+        return it (if 'create' is true) or return None.
+        """
+        cmd_obj = self.command_obj.get(command)
+        if not cmd_obj and create:
+            if DEBUG:
+                self.announce(
+                    "Distribution.get_command_obj(): "
+                    f"creating '{command}' command object"
+                )
+
+            klass = self.get_command_class(command)
+            cmd_obj = self.command_obj[command] = klass(self)
+            self.have_run[command] = False
+
+            # Set any options that were supplied in config files
+            # or on the command line.  (NB. support for error
+            # reporting is lame here: any errors aren't reported
+            # until 'finalize_options()' is called, which means
+            # we won't report the source of the error.)
+            options = self.command_options.get(command)
+            if options:
+                self._set_command_options(cmd_obj, options)
+
+        return cmd_obj
+
+    def _set_command_options(self, command_obj, option_dict=None):  # noqa: C901
+        """Set the options for 'command_obj' from 'option_dict'.  Basically
+        this means copying elements of a dictionary ('option_dict') to
+        attributes of an instance ('command').
+
+        'command_obj' must be a Command instance.  If 'option_dict' is not
+        supplied, uses the standard option dictionary for this command
+        (from 'self.command_options').
+        """
+        command_name = command_obj.get_command_name()
+        if option_dict is None:
+            option_dict = self.get_option_dict(command_name)
+
+        if DEBUG:
+            self.announce(f"  setting options for '{command_name}' command:")
+        for option, (source, value) in option_dict.items():
+            if DEBUG:
+                self.announce(f"    {option} = {value} (from {source})")
+            try:
+                bool_opts = [translate_longopt(o) for o in command_obj.boolean_options]
+            except AttributeError:
+                bool_opts = []
+            try:
+                neg_opt = command_obj.negative_opt
+            except AttributeError:
+                neg_opt = {}
+
+            try:
+                is_string = isinstance(value, str)
+                if option in neg_opt and is_string:
+                    setattr(command_obj, neg_opt[option], not strtobool(value))
+                elif option in bool_opts and is_string:
+                    setattr(command_obj, option, strtobool(value))
+                elif hasattr(command_obj, option):
+                    setattr(command_obj, option, value)
+                else:
+                    raise DistutilsOptionError(
+                        f"error in {source}: command '{command_name}' has no such option '{option}'"
+                    )
+            except ValueError as msg:
+                raise DistutilsOptionError(msg)
+
+    @overload
+    def reinitialize_command(
+        self, command: str, reinit_subcommands: bool = False
+    ) -> Command: ...
+    @overload
+    def reinitialize_command(
+        self, command: _CommandT, reinit_subcommands: bool = False
+    ) -> _CommandT: ...
+    def reinitialize_command(
+        self, command: str | Command, reinit_subcommands=False
+    ) -> Command:
+        """Reinitializes a command to the state it was in when first
+        returned by 'get_command_obj()': ie., initialized but not yet
+        finalized.  This provides the opportunity to sneak option
+        values in programmatically, overriding or supplementing
+        user-supplied values from the config files and command line.
+        You'll have to re-finalize the command object (by calling
+        'finalize_options()' or 'ensure_finalized()') before using it for
+        real.
+
+        'command' should be a command name (string) or command object.  If
+        'reinit_subcommands' is true, also reinitializes the command's
+        sub-commands, as declared by the 'sub_commands' class attribute (if
+        it has one).  See the "install" command for an example.  Only
+        reinitializes the sub-commands that actually matter, ie. those
+        whose test predicates return true.
+
+        Returns the reinitialized command object.
+        """
+        from distutils.cmd import Command
+
+        if not isinstance(command, Command):
+            command_name = command
+            command = self.get_command_obj(command_name)
+        else:
+            command_name = command.get_command_name()
+
+        if not command.finalized:
+            return command
+        command.initialize_options()
+        command.finalized = False
+        self.have_run[command_name] = False
+        self._set_command_options(command)
+
+        if reinit_subcommands:
+            for sub in command.get_sub_commands():
+                self.reinitialize_command(sub, reinit_subcommands)
+
+        return command
+
+    # -- Methods that operate on the Distribution ----------------------
+
+    def announce(self, msg, level: int = logging.INFO) -> None:
+        log.log(level, msg)
+
+    def run_commands(self) -> None:
+        """Run each command that was seen on the setup script command line.
+        Uses the list of commands found and cache of command objects
+        created by 'get_command_obj()'.
+        """
+        for cmd in self.commands:
+            self.run_command(cmd)
+
+    # -- Methods that operate on its Commands --------------------------
+
+    def run_command(self, command: str) -> None:
+        """Do whatever it takes to run a command (including nothing at all,
+        if the command has already been run).  Specifically: if we have
+        already created and run the command named by 'command', return
+        silently without doing anything.  If the command named by 'command'
+        doesn't even have a command object yet, create one.  Then invoke
+        'run()' on that command object (or an existing one).
+        """
+        # Already been here, done that? then return silently.
+        if self.have_run.get(command):
+            return
+
+        log.info("running %s", command)
+        cmd_obj = self.get_command_obj(command)
+        cmd_obj.ensure_finalized()
+        cmd_obj.run()
+        self.have_run[command] = True
+
+    # -- Distribution query methods ------------------------------------
+
+    def has_pure_modules(self) -> bool:
+        return len(self.packages or self.py_modules or []) > 0
+
+    def has_ext_modules(self) -> bool:
+        return self.ext_modules and len(self.ext_modules) > 0
+
+    def has_c_libraries(self) -> bool:
+        return self.libraries and len(self.libraries) > 0
+
+    def has_modules(self) -> bool:
+        return self.has_pure_modules() or self.has_ext_modules()
+
+    def has_headers(self) -> bool:
+        return self.headers and len(self.headers) > 0
+
+    def has_scripts(self) -> bool:
+        return self.scripts and len(self.scripts) > 0
+
+    def has_data_files(self) -> bool:
+        return self.data_files and len(self.data_files) > 0
+
+    def is_pure(self) -> bool:
+        return (
+            self.has_pure_modules()
+            and not self.has_ext_modules()
+            and not self.has_c_libraries()
+        )
+
+    # -- Metadata query methods ----------------------------------------
+
+    # If you're looking for 'get_name()', 'get_version()', and so forth,
+    # they are defined in a sneaky way: the constructor binds self.get_XXX
+    # to self.metadata.get_XXX.  The actual code is in the
+    # DistributionMetadata class, below.
+    if TYPE_CHECKING:
+        # Unfortunately this means we need to specify them manually or not expose statically
+        def _(self) -> None:
+            self.get_name = self.metadata.get_name
+            self.get_version = self.metadata.get_version
+            self.get_fullname = self.metadata.get_fullname
+            self.get_author = self.metadata.get_author
+            self.get_author_email = self.metadata.get_author_email
+            self.get_maintainer = self.metadata.get_maintainer
+            self.get_maintainer_email = self.metadata.get_maintainer_email
+            self.get_contact = self.metadata.get_contact
+            self.get_contact_email = self.metadata.get_contact_email
+            self.get_url = self.metadata.get_url
+            self.get_license = self.metadata.get_license
+            self.get_licence = self.metadata.get_licence
+            self.get_description = self.metadata.get_description
+            self.get_long_description = self.metadata.get_long_description
+            self.get_keywords = self.metadata.get_keywords
+            self.get_platforms = self.metadata.get_platforms
+            self.get_classifiers = self.metadata.get_classifiers
+            self.get_download_url = self.metadata.get_download_url
+            self.get_requires = self.metadata.get_requires
+            self.get_provides = self.metadata.get_provides
+            self.get_obsoletes = self.metadata.get_obsoletes
+
+        # Default attributes generated in __init__ from self.display_option_names
+        help_commands: bool
+        name: str | Literal[False]
+        version: str | Literal[False]
+        fullname: str | Literal[False]
+        author: str | Literal[False]
+        author_email: str | Literal[False]
+        maintainer: str | Literal[False]
+        maintainer_email: str | Literal[False]
+        contact: str | Literal[False]
+        contact_email: str | Literal[False]
+        url: str | Literal[False]
+        license: str | Literal[False]
+        licence: str | Literal[False]
+        description: str | Literal[False]
+        long_description: str | Literal[False]
+        platforms: str | list[str] | Literal[False]
+        classifiers: str | list[str] | Literal[False]
+        keywords: str | list[str] | Literal[False]
+        provides: list[str] | Literal[False]
+        requires: list[str] | Literal[False]
+        obsoletes: list[str] | Literal[False]
+
+
+class DistributionMetadata:
+    """Dummy class to hold the distribution meta-data: name, version,
+    author, and so forth.
+    """
+
+    _METHOD_BASENAMES = (
+        "name",
+        "version",
+        "author",
+        "author_email",
+        "maintainer",
+        "maintainer_email",
+        "url",
+        "license",
+        "description",
+        "long_description",
+        "keywords",
+        "platforms",
+        "fullname",
+        "contact",
+        "contact_email",
+        "classifiers",
+        "download_url",
+        # PEP 314
+        "provides",
+        "requires",
+        "obsoletes",
+    )
+
+    def __init__(
+        self, path: str | bytes | os.PathLike[str] | os.PathLike[bytes] | None = None
+    ) -> None:
+        if path is not None:
+            self.read_pkg_file(open(path))
+        else:
+            self.name: str | None = None
+            self.version: str | None = None
+            self.author: str | None = None
+            self.author_email: str | None = None
+            self.maintainer: str | None = None
+            self.maintainer_email: str | None = None
+            self.url: str | None = None
+            self.license: str | None = None
+            self.description: str | None = None
+            self.long_description: str | None = None
+            self.keywords: str | list[str] | None = None
+            self.platforms: str | list[str] | None = None
+            self.classifiers: str | list[str] | None = None
+            self.download_url: str | None = None
+            # PEP 314
+            self.provides: str | list[str] | None = None
+            self.requires: str | list[str] | None = None
+            self.obsoletes: str | list[str] | None = None
+
+    def read_pkg_file(self, file: IO[str]) -> None:
+        """Reads the metadata values from a file object."""
+        msg = message_from_file(file)
+
+        def _read_field(name: str) -> str | None:
+            value = msg[name]
+            if value and value != "UNKNOWN":
+                return value
+            return None
+
+        def _read_list(name):
+            values = msg.get_all(name, None)
+            if values == []:
+                return None
+            return values
+
+        metadata_version = msg['metadata-version']
+        self.name = _read_field('name')
+        self.version = _read_field('version')
+        self.description = _read_field('summary')
+        # we are filling author only.
+        self.author = _read_field('author')
+        self.maintainer = None
+        self.author_email = _read_field('author-email')
+        self.maintainer_email = None
+        self.url = _read_field('home-page')
+        self.license = _read_field('license')
+
+        if 'download-url' in msg:
+            self.download_url = _read_field('download-url')
+        else:
+            self.download_url = None
+
+        self.long_description = _read_field('description')
+        self.description = _read_field('summary')
+
+        if 'keywords' in msg:
+            self.keywords = _read_field('keywords').split(',')
+
+        self.platforms = _read_list('platform')
+        self.classifiers = _read_list('classifier')
+
+        # PEP 314 - these fields only exist in 1.1
+        if metadata_version == '1.1':
+            self.requires = _read_list('requires')
+            self.provides = _read_list('provides')
+            self.obsoletes = _read_list('obsoletes')
+        else:
+            self.requires = None
+            self.provides = None
+            self.obsoletes = None
+
+    def write_pkg_info(self, base_dir: str | os.PathLike[str]) -> None:
+        """Write the PKG-INFO file into the release tree."""
+        with open(
+            os.path.join(base_dir, 'PKG-INFO'), 'w', encoding='UTF-8'
+        ) as pkg_info:
+            self.write_pkg_file(pkg_info)
+
+    def write_pkg_file(self, file: SupportsWrite[str]) -> None:
+        """Write the PKG-INFO format data to a file object."""
+        version = '1.0'
+        if (
+            self.provides
+            or self.requires
+            or self.obsoletes
+            or self.classifiers
+            or self.download_url
+        ):
+            version = '1.1'
+
+        # required fields
+        file.write(f'Metadata-Version: {version}\n')
+        file.write(f'Name: {self.get_name()}\n')
+        file.write(f'Version: {self.get_version()}\n')
+
+        def maybe_write(header, val):
+            if val:
+                file.write(f"{header}: {val}\n")
+
+        # optional fields
+        maybe_write("Summary", self.get_description())
+        maybe_write("Home-page", self.get_url())
+        maybe_write("Author", self.get_contact())
+        maybe_write("Author-email", self.get_contact_email())
+        maybe_write("License", self.get_license())
+        maybe_write("Download-URL", self.download_url)
+        maybe_write("Description", rfc822_escape(self.get_long_description() or ""))
+        maybe_write("Keywords", ",".join(self.get_keywords()))
+
+        self._write_list(file, 'Platform', self.get_platforms())
+        self._write_list(file, 'Classifier', self.get_classifiers())
+
+        # PEP 314
+        self._write_list(file, 'Requires', self.get_requires())
+        self._write_list(file, 'Provides', self.get_provides())
+        self._write_list(file, 'Obsoletes', self.get_obsoletes())
+
+    def _write_list(self, file, name, values):
+        values = values or []
+        for value in values:
+            file.write(f'{name}: {value}\n')
+
+    # -- Metadata query methods ----------------------------------------
+
+    def get_name(self) -> str:
+        return self.name or "UNKNOWN"
+
+    def get_version(self) -> str:
+        return self.version or "0.0.0"
+
+    def get_fullname(self) -> str:
+        return self._fullname(self.get_name(), self.get_version())
+
+    @staticmethod
+    def _fullname(name: str, version: str) -> str:
+        """
+        >>> DistributionMetadata._fullname('setup.tools', '1.0-2')
+        'setup_tools-1.0.post2'
+        >>> DistributionMetadata._fullname('setup-tools', '1.2post2')
+        'setup_tools-1.2.post2'
+        >>> DistributionMetadata._fullname('setup-tools', '1.0-r2')
+        'setup_tools-1.0.post2'
+        >>> DistributionMetadata._fullname('setup.tools', '1.0.post')
+        'setup_tools-1.0.post0'
+        >>> DistributionMetadata._fullname('setup.tools', '1.0+ubuntu-1')
+        'setup_tools-1.0+ubuntu.1'
+        """
+        return "{}-{}".format(
+            canonicalize_name(name).replace('-', '_'),
+            canonicalize_version(version, strip_trailing_zero=False),
+        )
+
+    def get_author(self) -> str | None:
+        return self.author
+
+    def get_author_email(self) -> str | None:
+        return self.author_email
+
+    def get_maintainer(self) -> str | None:
+        return self.maintainer
+
+    def get_maintainer_email(self) -> str | None:
+        return self.maintainer_email
+
+    def get_contact(self) -> str | None:
+        return self.maintainer or self.author
+
+    def get_contact_email(self) -> str | None:
+        return self.maintainer_email or self.author_email
+
+    def get_url(self) -> str | None:
+        return self.url
+
+    def get_license(self) -> str | None:
+        return self.license
+
+    get_licence = get_license
+
+    def get_description(self) -> str | None:
+        return self.description
+
+    def get_long_description(self) -> str | None:
+        return self.long_description
+
+    def get_keywords(self) -> str | list[str]:
+        return self.keywords or []
+
+    def set_keywords(self, value: str | Iterable[str]) -> None:
+        self.keywords = _ensure_list(value, 'keywords')
+
+    def get_platforms(self) -> str | list[str] | None:
+        return self.platforms
+
+    def set_platforms(self, value: str | Iterable[str]) -> None:
+        self.platforms = _ensure_list(value, 'platforms')
+
+    def get_classifiers(self) -> str | list[str]:
+        return self.classifiers or []
+
+    def set_classifiers(self, value: str | Iterable[str]) -> None:
+        self.classifiers = _ensure_list(value, 'classifiers')
+
+    def get_download_url(self) -> str | None:
+        return self.download_url
+
+    # PEP 314
+    def get_requires(self) -> str | list[str]:
+        return self.requires or []
+
+    def set_requires(self, value: Iterable[str]) -> None:
+        import distutils.versionpredicate
+
+        for v in value:
+            distutils.versionpredicate.VersionPredicate(v)
+        self.requires = list(value)
+
+    def get_provides(self) -> str | list[str]:
+        return self.provides or []
+
+    def set_provides(self, value: Iterable[str]) -> None:
+        value = [v.strip() for v in value]
+        for v in value:
+            import distutils.versionpredicate
+
+            distutils.versionpredicate.split_provision(v)
+        self.provides = value
+
+    def get_obsoletes(self) -> str | list[str]:
+        return self.obsoletes or []
+
+    def set_obsoletes(self, value: Iterable[str]) -> None:
+        import distutils.versionpredicate
+
+        for v in value:
+            distutils.versionpredicate.VersionPredicate(v)
+        self.obsoletes = list(value)
+
+
+def fix_help_options(options):
+    """Convert a 4-tuple 'help_options' list as found in various command
+    classes to the 3-tuple form required by FancyGetopt.
+    """
+    return [opt[0:3] for opt in options]

python/Lib/site-packages/setuptools/_distutils/errors.py

@@ -0,0 +1,108 @@
+"""
+Exceptions used by the Distutils modules.
+
+Distutils modules may raise these or standard exceptions,
+including :exc:`SystemExit`.
+"""
+
+# compiler exceptions aliased for compatibility
+from .compilers.C.errors import CompileError as CompileError
+from .compilers.C.errors import Error as _Error
+from .compilers.C.errors import LibError as LibError
+from .compilers.C.errors import LinkError as LinkError
+from .compilers.C.errors import PreprocessError as PreprocessError
+from .compilers.C.errors import UnknownFileType as _UnknownFileType
+
+CCompilerError = _Error
+UnknownFileError = _UnknownFileType
+
+
+class DistutilsError(Exception):
+    """The root of all Distutils evil."""
+
+    pass
+
+
+class DistutilsModuleError(DistutilsError):
+    """Unable to load an expected module, or to find an expected class
+    within some module (in particular, command modules and classes)."""
+
+    pass
+
+
+class DistutilsClassError(DistutilsError):
+    """Some command class (or possibly distribution class, if anyone
+    feels a need to subclass Distribution) is found not to be holding
+    up its end of the bargain, ie. implementing some part of the
+    "command "interface."""
+
+    pass
+
+
+class DistutilsGetoptError(DistutilsError):
+    """The option table provided to 'fancy_getopt()' is bogus."""
+
+    pass
+
+
+class DistutilsArgError(DistutilsError):
+    """Raised by fancy_getopt in response to getopt.error -- ie. an
+    error in the command line usage."""
+
+    pass
+
+
+class DistutilsFileError(DistutilsError):
+    """Any problems in the filesystem: expected file not found, etc.
+    Typically this is for problems that we detect before OSError
+    could be raised."""
+
+    pass
+
+
+class DistutilsOptionError(DistutilsError):
+    """Syntactic/semantic errors in command options, such as use of
+    mutually conflicting options, or inconsistent options,
+    badly-spelled values, etc.  No distinction is made between option
+    values originating in the setup script, the command line, config
+    files, or what-have-you -- but if we *know* something originated in
+    the setup script, we'll raise DistutilsSetupError instead."""
+
+    pass
+
+
+class DistutilsSetupError(DistutilsError):
+    """For errors that can be definitely blamed on the setup script,
+    such as invalid keyword arguments to 'setup()'."""
+
+    pass
+
+
+class DistutilsPlatformError(DistutilsError):
+    """We don't know how to do something on the current platform (but
+    we do know how to do it on some platform) -- eg. trying to compile
+    C files on a platform not supported by a CCompiler subclass."""
+
+    pass
+
+
+class DistutilsExecError(DistutilsError):
+    """Any problems executing an external program (such as the C
+    compiler, when compiling C files)."""
+
+    pass
+
+
+class DistutilsInternalError(DistutilsError):
+    """Internal inconsistencies or impossibilities (obviously, this
+    should never be seen if the code is working!)."""
+
+    pass
+
+
+class DistutilsTemplateError(DistutilsError):
+    """Syntax error in a file list template."""
+
+
+class DistutilsByteCompileError(DistutilsError):
+    """Byte compile error."""

python/Lib/site-packages/setuptools/_distutils/extension.py

@@ -0,0 +1,258 @@
+"""distutils.extension
+
+Provides the Extension class, used to describe C/C++ extension
+modules in setup scripts."""
+
+from __future__ import annotations
+
+import os
+import warnings
+from collections.abc import Iterable
+
+# This class is really only used by the "build_ext" command, so it might
+# make sense to put it in distutils.command.build_ext.  However, that
+# module is already big enough, and I want to make this class a bit more
+# complex to simplify some common cases ("foo" module in "foo.c") and do
+# better error-checking ("foo.c" actually exists).
+#
+# Also, putting this in build_ext.py means every setup script would have to
+# import that large-ish module (indirectly, through distutils.core) in
+# order to do anything.
+
+
+class Extension:
+    """Just a collection of attributes that describes an extension
+    module and everything needed to build it (hopefully in a portable
+    way, but there are hooks that let you be as unportable as you need).
+
+    Instance attributes:
+      name : string
+        the full name of the extension, including any packages -- ie.
+        *not* a filename or pathname, but Python dotted name
+      sources : Iterable[string | os.PathLike]
+        iterable of source filenames (except strings, which could be misinterpreted
+        as a single filename), relative to the distribution root (where the setup
+        script lives), in Unix form (slash-separated) for portability. Can be any
+        non-string iterable (list, tuple, set, etc.) containing strings or
+        PathLike objects. Source files may be C, C++, SWIG (.i), platform-specific
+        resource files, or whatever else is recognized by the "build_ext" command
+        as source for a Python extension.
+      include_dirs : [string]
+        list of directories to search for C/C++ header files (in Unix
+        form for portability)
+      define_macros : [(name : string, value : string|None)]
+        list of macros to define; each macro is defined using a 2-tuple,
+        where 'value' is either the string to define it to or None to
+        define it without a particular value (equivalent of "#define
+        FOO" in source or -DFOO on Unix C compiler command line)
+      undef_macros : [string]
+        list of macros to undefine explicitly
+      library_dirs : [string]
+        list of directories to search for C/C++ libraries at link time
+      libraries : [string]
+        list of library names (not filenames or paths) to link against
+      runtime_library_dirs : [string]
+        list of directories to search for C/C++ libraries at run time
+        (for shared extensions, this is when the extension is loaded)
+      extra_objects : [string]
+        list of extra files to link with (eg. object files not implied
+        by 'sources', static library that must be explicitly specified,
+        binary resource files, etc.)
+      extra_compile_args : [string]
+        any extra platform- and compiler-specific information to use
+        when compiling the source files in 'sources'.  For platforms and
+        compilers where "command line" makes sense, this is typically a
+        list of command-line arguments, but for other platforms it could
+        be anything.
+      extra_link_args : [string]
+        any extra platform- and compiler-specific information to use
+        when linking object files together to create the extension (or
+        to create a new static Python interpreter).  Similar
+        interpretation as for 'extra_compile_args'.
+      export_symbols : [string]
+        list of symbols to be exported from a shared extension.  Not
+        used on all platforms, and not generally necessary for Python
+        extensions, which typically export exactly one symbol: "init" +
+        extension_name.
+      swig_opts : [string]
+        any extra options to pass to SWIG if a source file has the .i
+        extension.
+      depends : [string]
+        list of files that the extension depends on
+      language : string
+        extension language (i.e. "c", "c++", "objc"). Will be detected
+        from the source extensions if not provided.
+      optional : boolean
+        specifies that a build failure in the extension should not abort the
+        build process, but simply not install the failing extension.
+    """
+
+    # When adding arguments to this constructor, be sure to update
+    # setup_keywords in core.py.
+    def __init__(
+        self,
+        name: str,
+        sources: Iterable[str | os.PathLike[str]],
+        include_dirs: list[str] | None = None,
+        define_macros: list[tuple[str, str | None]] | None = None,
+        undef_macros: list[str] | None = None,
+        library_dirs: list[str] | None = None,
+        libraries: list[str] | None = None,
+        runtime_library_dirs: list[str] | None = None,
+        extra_objects: list[str] | None = None,
+        extra_compile_args: list[str] | None = None,
+        extra_link_args: list[str] | None = None,
+        export_symbols: list[str] | None = None,
+        swig_opts: list[str] | None = None,
+        depends: list[str] | None = None,
+        language: str | None = None,
+        optional: bool | None = None,
+        **kw,  # To catch unknown keywords
+    ):
+        if not isinstance(name, str):
+            raise TypeError("'name' must be a string")
+
+        # handle the string case first; since strings are iterable, disallow them
+        if isinstance(sources, str):
+            raise TypeError(
+                "'sources' must be an iterable of strings or PathLike objects, not a string"
+            )
+
+        # now we check if it's iterable and contains valid types
+        try:
+            self.sources = list(map(os.fspath, sources))
+        except TypeError:
+            raise TypeError(
+                "'sources' must be an iterable of strings or PathLike objects"
+            )
+
+        self.name = name
+        self.include_dirs = include_dirs or []
+        self.define_macros = define_macros or []
+        self.undef_macros = undef_macros or []
+        self.library_dirs = library_dirs or []
+        self.libraries = libraries or []
+        self.runtime_library_dirs = runtime_library_dirs or []
+        self.extra_objects = extra_objects or []
+        self.extra_compile_args = extra_compile_args or []
+        self.extra_link_args = extra_link_args or []
+        self.export_symbols = export_symbols or []
+        self.swig_opts = swig_opts or []
+        self.depends = depends or []
+        self.language = language
+        self.optional = optional
+
+        # If there are unknown keyword options, warn about them
+        if len(kw) > 0:
+            options = [repr(option) for option in kw]
+            options = ', '.join(sorted(options))
+            msg = f"Unknown Extension options: {options}"
+            warnings.warn(msg)
+
+    def __repr__(self):
+        return f'<{self.__class__.__module__}.{self.__class__.__qualname__}({self.name!r}) at {id(self):#x}>'
+
+
+def read_setup_file(filename):  # noqa: C901
+    """Reads a Setup file and returns Extension instances."""
+    from distutils.sysconfig import _variable_rx, expand_makefile_vars, parse_makefile
+    from distutils.text_file import TextFile
+    from distutils.util import split_quoted
+
+    # First pass over the file to gather "VAR = VALUE" assignments.
+    vars = parse_makefile(filename)
+
+    # Second pass to gobble up the real content: lines of the form
+    #   <module> ... [<sourcefile> ...] [<cpparg> ...] [<library> ...]
+    file = TextFile(
+        filename,
+        strip_comments=True,
+        skip_blanks=True,
+        join_lines=True,
+        lstrip_ws=True,
+        rstrip_ws=True,
+    )
+    try:
+        extensions = []
+
+        while True:
+            line = file.readline()
+            if line is None:  # eof
+                break
+            if _variable_rx.match(line):  # VAR=VALUE, handled in first pass
+                continue
+
+            if line[0] == line[-1] == "*":
+                file.warn(f"'{line}' lines not handled yet")
+                continue
+
+            line = expand_makefile_vars(line, vars)
+            words = split_quoted(line)
+
+            # NB. this parses a slightly different syntax than the old
+            # makesetup script: here, there must be exactly one extension per
+            # line, and it must be the first word of the line.  I have no idea
+            # why the old syntax supported multiple extensions per line, as
+            # they all wind up being the same.
+
+            module = words[0]
+            ext = Extension(module, [])
+            append_next_word = None
+
+            for word in words[1:]:
+                if append_next_word is not None:
+                    append_next_word.append(word)
+                    append_next_word = None
+                    continue
+
+                suffix = os.path.splitext(word)[1]
+                switch = word[0:2]
+                value = word[2:]
+
+                if suffix in (".c", ".cc", ".cpp", ".cxx", ".c++", ".m", ".mm"):
+                    # hmm, should we do something about C vs. C++ sources?
+                    # or leave it up to the CCompiler implementation to
+                    # worry about?
+                    ext.sources.append(word)
+                elif switch == "-I":
+                    ext.include_dirs.append(value)
+                elif switch == "-D":
+                    equals = value.find("=")
+                    if equals == -1:  # bare "-DFOO" -- no value
+                        ext.define_macros.append((value, None))
+                    else:  # "-DFOO=blah"
+                        ext.define_macros.append((value[0:equals], value[equals + 2 :]))
+                elif switch == "-U":
+                    ext.undef_macros.append(value)
+                elif switch == "-C":  # only here 'cause makesetup has it!
+                    ext.extra_compile_args.append(word)
+                elif switch == "-l":
+                    ext.libraries.append(value)
+                elif switch == "-L":
+                    ext.library_dirs.append(value)
+                elif switch == "-R":
+                    ext.runtime_library_dirs.append(value)
+                elif word == "-rpath":
+                    append_next_word = ext.runtime_library_dirs
+                elif word == "-Xlinker":
+                    append_next_word = ext.extra_link_args
+                elif word == "-Xcompiler":
+                    append_next_word = ext.extra_compile_args
+                elif switch == "-u":
+                    ext.extra_link_args.append(word)
+                    if not value:
+                        append_next_word = ext.extra_link_args
+                elif suffix in (".a", ".so", ".sl", ".o", ".dylib"):
+                    # NB. a really faithful emulation of makesetup would
+                    # append a .o file to extra_objects only if it
+                    # had a slash in it; otherwise, it would s/.o/.c/
+                    # and append it to sources.  Hmmmm.
+                    ext.extra_objects.append(word)
+                else:
+                    file.warn(f"unrecognized argument '{word}'")
+
+            extensions.append(ext)
+    finally:
+        file.close()
+
+    return extensions

python/Lib/site-packages/setuptools/_distutils/fancy_getopt.py

@@ -0,0 +1,471 @@
+"""distutils.fancy_getopt
+
+Wrapper around the standard getopt module that provides the following
+additional features:
+  * short and long options are tied together
+  * options have help strings, so fancy_getopt could potentially
+    create a complete usage summary
+  * options set attributes of a passed-in object
+"""
+
+from __future__ import annotations
+
+import getopt
+import re
+import string
+import sys
+from collections.abc import Sequence
+from typing import Any
+
+from .errors import DistutilsArgError, DistutilsGetoptError
+
+# Much like command_re in distutils.core, this is close to but not quite
+# the same as a Python NAME -- except, in the spirit of most GNU
+# utilities, we use '-' in place of '_'.  (The spirit of LISP lives on!)
+# The similarities to NAME are again not a coincidence...
+longopt_pat = r'[a-zA-Z](?:[a-zA-Z0-9-]*)'
+longopt_re = re.compile(rf'^{longopt_pat}$')
+
+# For recognizing "negative alias" options, eg. "quiet=!verbose"
+neg_alias_re = re.compile(f"^({longopt_pat})=!({longopt_pat})$")
+
+# This is used to translate long options to legitimate Python identifiers
+# (for use as attributes of some object).
+longopt_xlate = str.maketrans('-', '_')
+
+
+class FancyGetopt:
+    """Wrapper around the standard 'getopt()' module that provides some
+    handy extra functionality:
+      * short and long options are tied together
+      * options have help strings, and help text can be assembled
+        from them
+      * options set attributes of a passed-in object
+      * boolean options can have "negative aliases" -- eg. if
+        --quiet is the "negative alias" of --verbose, then "--quiet"
+        on the command line sets 'verbose' to false
+    """
+
+    def __init__(self, option_table=None):
+        # The option table is (currently) a list of tuples.  The
+        # tuples may have 3 or four values:
+        #   (long_option, short_option, help_string [, repeatable])
+        # if an option takes an argument, its long_option should have '='
+        # appended; short_option should just be a single character, no ':'
+        # in any case.  If a long_option doesn't have a corresponding
+        # short_option, short_option should be None.  All option tuples
+        # must have long options.
+        self.option_table = option_table
+
+        # 'option_index' maps long option names to entries in the option
+        # table (ie. those 3-tuples).
+        self.option_index = {}
+        if self.option_table:
+            self._build_index()
+
+        # 'alias' records (duh) alias options; {'foo': 'bar'} means
+        # --foo is an alias for --bar
+        self.alias = {}
+
+        # 'negative_alias' keeps track of options that are the boolean
+        # opposite of some other option
+        self.negative_alias = {}
+
+        # These keep track of the information in the option table.  We
+        # don't actually populate these structures until we're ready to
+        # parse the command-line, since the 'option_table' passed in here
+        # isn't necessarily the final word.
+        self.short_opts = []
+        self.long_opts = []
+        self.short2long = {}
+        self.attr_name = {}
+        self.takes_arg = {}
+
+        # And 'option_order' is filled up in 'getopt()'; it records the
+        # original order of options (and their values) on the command-line,
+        # but expands short options, converts aliases, etc.
+        self.option_order = []
+
+    def _build_index(self):
+        self.option_index.clear()
+        for option in self.option_table:
+            self.option_index[option[0]] = option
+
+    def set_option_table(self, option_table):
+        self.option_table = option_table
+        self._build_index()
+
+    def add_option(self, long_option, short_option=None, help_string=None):
+        if long_option in self.option_index:
+            raise DistutilsGetoptError(
+                f"option conflict: already an option '{long_option}'"
+            )
+        else:
+            option = (long_option, short_option, help_string)
+            self.option_table.append(option)
+            self.option_index[long_option] = option
+
+    def has_option(self, long_option):
+        """Return true if the option table for this parser has an
+        option with long name 'long_option'."""
+        return long_option in self.option_index
+
+    def get_attr_name(self, long_option):
+        """Translate long option name 'long_option' to the form it
+        has as an attribute of some object: ie., translate hyphens
+        to underscores."""
+        return long_option.translate(longopt_xlate)
+
+    def _check_alias_dict(self, aliases, what):
+        assert isinstance(aliases, dict)
+        for alias, opt in aliases.items():
+            if alias not in self.option_index:
+                raise DistutilsGetoptError(
+                    f"invalid {what} '{alias}': option '{alias}' not defined"
+                )
+            if opt not in self.option_index:
+                raise DistutilsGetoptError(
+                    f"invalid {what} '{alias}': aliased option '{opt}' not defined"
+                )
+
+    def set_aliases(self, alias):
+        """Set the aliases for this option parser."""
+        self._check_alias_dict(alias, "alias")
+        self.alias = alias
+
+    def set_negative_aliases(self, negative_alias):
+        """Set the negative aliases for this option parser.
+        'negative_alias' should be a dictionary mapping option names to
+        option names, both the key and value must already be defined
+        in the option table."""
+        self._check_alias_dict(negative_alias, "negative alias")
+        self.negative_alias = negative_alias
+
+    def _grok_option_table(self):  # noqa: C901
+        """Populate the various data structures that keep tabs on the
+        option table.  Called by 'getopt()' before it can do anything
+        worthwhile.
+        """
+        self.long_opts = []
+        self.short_opts = []
+        self.short2long.clear()
+        self.repeat = {}
+
+        for option in self.option_table:
+            if len(option) == 3:
+                long, short, help = option
+                repeat = 0
+            elif len(option) == 4:
+                long, short, help, repeat = option
+            else:
+                # the option table is part of the code, so simply
+                # assert that it is correct
+                raise ValueError(f"invalid option tuple: {option!r}")
+
+            # Type- and value-check the option names
+            if not isinstance(long, str) or len(long) < 2:
+                raise DistutilsGetoptError(
+                    f"invalid long option '{long}': must be a string of length >= 2"
+                )
+
+            if not ((short is None) or (isinstance(short, str) and len(short) == 1)):
+                raise DistutilsGetoptError(
+                    f"invalid short option '{short}': must a single character or None"
+                )
+
+            self.repeat[long] = repeat
+            self.long_opts.append(long)
+
+            if long[-1] == '=':  # option takes an argument?
+                if short:
+                    short = short + ':'
+                long = long[0:-1]
+                self.takes_arg[long] = True
+            else:
+                # Is option is a "negative alias" for some other option (eg.
+                # "quiet" == "!verbose")?
+                alias_to = self.negative_alias.get(long)
+                if alias_to is not None:
+                    if self.takes_arg[alias_to]:
+                        raise DistutilsGetoptError(
+                            f"invalid negative alias '{long}': "
+                            f"aliased option '{alias_to}' takes a value"
+                        )
+
+                    self.long_opts[-1] = long  # XXX redundant?!
+                self.takes_arg[long] = False
+
+            # If this is an alias option, make sure its "takes arg" flag is
+            # the same as the option it's aliased to.
+            alias_to = self.alias.get(long)
+            if alias_to is not None:
+                if self.takes_arg[long] != self.takes_arg[alias_to]:
+                    raise DistutilsGetoptError(
+                        f"invalid alias '{long}': inconsistent with "
+                        f"aliased option '{alias_to}' (one of them takes a value, "
+                        "the other doesn't"
+                    )
+
+            # Now enforce some bondage on the long option name, so we can
+            # later translate it to an attribute name on some object.  Have
+            # to do this a bit late to make sure we've removed any trailing
+            # '='.
+            if not longopt_re.match(long):
+                raise DistutilsGetoptError(
+                    f"invalid long option name '{long}' "
+                    "(must be letters, numbers, hyphens only"
+                )
+
+            self.attr_name[long] = self.get_attr_name(long)
+            if short:
+                self.short_opts.append(short)
+                self.short2long[short[0]] = long
+
+    def getopt(self, args: Sequence[str] | None = None, object=None):  # noqa: C901
+        """Parse command-line options in args. Store as attributes on object.
+
+        If 'args' is None or not supplied, uses 'sys.argv[1:]'.  If
+        'object' is None or not supplied, creates a new OptionDummy
+        object, stores option values there, and returns a tuple (args,
+        object).  If 'object' is supplied, it is modified in place and
+        'getopt()' just returns 'args'; in both cases, the returned
+        'args' is a modified copy of the passed-in 'args' list, which
+        is left untouched.
+        """
+        if args is None:
+            args = sys.argv[1:]
+        if object is None:
+            object = OptionDummy()
+            created_object = True
+        else:
+            created_object = False
+
+        self._grok_option_table()
+
+        short_opts = ' '.join(self.short_opts)
+        try:
+            opts, args = getopt.getopt(args, short_opts, self.long_opts)
+        except getopt.error as msg:
+            raise DistutilsArgError(msg)
+
+        for opt, val in opts:
+            if len(opt) == 2 and opt[0] == '-':  # it's a short option
+                opt = self.short2long[opt[1]]
+            else:
+                assert len(opt) > 2 and opt[:2] == '--'
+                opt = opt[2:]
+
+            alias = self.alias.get(opt)
+            if alias:
+                opt = alias
+
+            if not self.takes_arg[opt]:  # boolean option?
+                assert val == '', "boolean option can't have value"
+                alias = self.negative_alias.get(opt)
+                if alias:
+                    opt = alias
+                    val = 0
+                else:
+                    val = 1
+
+            attr = self.attr_name[opt]
+            # The only repeating option at the moment is 'verbose'.
+            # It has a negative option -q quiet, which should set verbose = False.
+            if val and self.repeat.get(attr) is not None:
+                val = getattr(object, attr, 0) + 1
+            setattr(object, attr, val)
+            self.option_order.append((opt, val))
+
+        # for opts
+        if created_object:
+            return args, object
+        else:
+            return args
+
+    def get_option_order(self):
+        """Returns the list of (option, value) tuples processed by the
+        previous run of 'getopt()'.  Raises RuntimeError if
+        'getopt()' hasn't been called yet.
+        """
+        if self.option_order is None:
+            raise RuntimeError("'getopt()' hasn't been called yet")
+        else:
+            return self.option_order
+
+    def generate_help(self, header=None):  # noqa: C901
+        """Generate help text (a list of strings, one per suggested line of
+        output) from the option table for this FancyGetopt object.
+        """
+        # Blithely assume the option table is good: probably wouldn't call
+        # 'generate_help()' unless you've already called 'getopt()'.
+
+        # First pass: determine maximum length of long option names
+        max_opt = 0
+        for option in self.option_table:
+            long = option[0]
+            short = option[1]
+            ell = len(long)
+            if long[-1] == '=':
+                ell = ell - 1
+            if short is not None:
+                ell = ell + 5  # " (-x)" where short == 'x'
+            if ell > max_opt:
+                max_opt = ell
+
+        opt_width = max_opt + 2 + 2 + 2  # room for indent + dashes + gutter
+
+        # Typical help block looks like this:
+        #   --foo       controls foonabulation
+        # Help block for longest option looks like this:
+        #   --flimflam  set the flim-flam level
+        # and with wrapped text:
+        #   --flimflam  set the flim-flam level (must be between
+        #               0 and 100, except on Tuesdays)
+        # Options with short names will have the short name shown (but
+        # it doesn't contribute to max_opt):
+        #   --foo (-f)  controls foonabulation
+        # If adding the short option would make the left column too wide,
+        # we push the explanation off to the next line
+        #   --flimflam (-l)
+        #               set the flim-flam level
+        # Important parameters:
+        #   - 2 spaces before option block start lines
+        #   - 2 dashes for each long option name
+        #   - min. 2 spaces between option and explanation (gutter)
+        #   - 5 characters (incl. space) for short option name
+
+        # Now generate lines of help text.  (If 80 columns were good enough
+        # for Jesus, then 78 columns are good enough for me!)
+        line_width = 78
+        text_width = line_width - opt_width
+        big_indent = ' ' * opt_width
+        if header:
+            lines = [header]
+        else:
+            lines = ['Option summary:']
+
+        for option in self.option_table:
+            long, short, help = option[:3]
+            text = wrap_text(help, text_width)
+            if long[-1] == '=':
+                long = long[0:-1]
+
+            # Case 1: no short option at all (makes life easy)
+            if short is None:
+                if text:
+                    lines.append(f"  --{long:<{max_opt}}  {text[0]}")
+                else:
+                    lines.append(f"  --{long:<{max_opt}}")
+
+            # Case 2: we have a short option, so we have to include it
+            # just after the long option
+            else:
+                opt_names = f"{long} (-{short})"
+                if text:
+                    lines.append(f"  --{opt_names:<{max_opt}}  {text[0]}")
+                else:
+                    lines.append(f"  --{opt_names:<{max_opt}}")
+
+            for ell in text[1:]:
+                lines.append(big_indent + ell)
+        return lines
+
+    def print_help(self, header=None, file=None):
+        if file is None:
+            file = sys.stdout
+        for line in self.generate_help(header):
+            file.write(line + "\n")
+
+
+def fancy_getopt(options, negative_opt, object, args: Sequence[str] | None):
+    parser = FancyGetopt(options)
+    parser.set_negative_aliases(negative_opt)
+    return parser.getopt(args, object)
+
+
+WS_TRANS = {ord(_wschar): ' ' for _wschar in string.whitespace}
+
+
+def wrap_text(text, width):
+    """wrap_text(text : string, width : int) -> [string]
+
+    Split 'text' into multiple lines of no more than 'width' characters
+    each, and return the list of strings that results.
+    """
+    if text is None:
+        return []
+    if len(text) <= width:
+        return [text]
+
+    text = text.expandtabs()
+    text = text.translate(WS_TRANS)
+    chunks = re.split(r'( +|-+)', text)
+    chunks = [ch for ch in chunks if ch]  # ' - ' results in empty strings
+    lines = []
+
+    while chunks:
+        cur_line = []  # list of chunks (to-be-joined)
+        cur_len = 0  # length of current line
+
+        while chunks:
+            ell = len(chunks[0])
+            if cur_len + ell <= width:  # can squeeze (at least) this chunk in
+                cur_line.append(chunks[0])
+                del chunks[0]
+                cur_len = cur_len + ell
+            else:  # this line is full
+                # drop last chunk if all space
+                if cur_line and cur_line[-1][0] == ' ':
+                    del cur_line[-1]
+                break
+
+        if chunks:  # any chunks left to process?
+            # if the current line is still empty, then we had a single
+            # chunk that's too big too fit on a line -- so we break
+            # down and break it up at the line width
+            if cur_len == 0:
+                cur_line.append(chunks[0][0:width])
+                chunks[0] = chunks[0][width:]
+
+            # all-whitespace chunks at the end of a line can be discarded
+            # (and we know from the re.split above that if a chunk has
+            # *any* whitespace, it is *all* whitespace)
+            if chunks[0][0] == ' ':
+                del chunks[0]
+
+        # and store this line in the list-of-all-lines -- as a single
+        # string, of course!
+        lines.append(''.join(cur_line))
+
+    return lines
+
+
+def translate_longopt(opt):
+    """Convert a long option name to a valid Python identifier by
+    changing "-" to "_".
+    """
+    return opt.translate(longopt_xlate)
+
+
+class OptionDummy:
+    """Dummy class just used as a place to hold command-line option
+    values as instance attributes."""
+
+    def __init__(self, options: Sequence[Any] = []):
+        """Create a new OptionDummy instance.  The attributes listed in
+        'options' will be initialized to None."""
+        for opt in options:
+            setattr(self, opt, None)
+
+
+if __name__ == "__main__":
+    text = """\
+Tra-la-la, supercalifragilisticexpialidocious.
+How *do* you spell that odd word, anyways?
+(Someone ask Mary -- she'll know [or she'll
+say, "How should I know?"].)"""
+
+    for w in (10, 20, 30, 40):
+        print(f"width: {w}")
+        print("\n".join(wrap_text(text, w)))
+        print()

python/Lib/site-packages/setuptools/_distutils/file_util.py

@@ -0,0 +1,228 @@
+"""distutils.file_util
+
+Utility functions for operating on single files.
+"""
+
+import os
+
+from ._log import log
+from .errors import DistutilsFileError
+
+# for generating verbose output in 'copy_file()'
+_copy_action = {None: 'copying', 'hard': 'hard linking', 'sym': 'symbolically linking'}
+
+
+def _copy_file_contents(src, dst, buffer_size=16 * 1024):  # noqa: C901
+    """Copy the file 'src' to 'dst'; both must be filenames.  Any error
+    opening either file, reading from 'src', or writing to 'dst', raises
+    DistutilsFileError.  Data is read/written in chunks of 'buffer_size'
+    bytes (default 16k).  No attempt is made to handle anything apart from
+    regular files.
+    """
+    # Stolen from shutil module in the standard library, but with
+    # custom error-handling added.
+    fsrc = None
+    fdst = None
+    try:
+        try:
+            fsrc = open(src, 'rb')
+        except OSError as e:
+            raise DistutilsFileError(f"could not open '{src}': {e.strerror}")
+
+        if os.path.exists(dst):
+            try:
+                os.unlink(dst)
+            except OSError as e:
+                raise DistutilsFileError(f"could not delete '{dst}': {e.strerror}")
+
+        try:
+            fdst = open(dst, 'wb')
+        except OSError as e:
+            raise DistutilsFileError(f"could not create '{dst}': {e.strerror}")
+
+        while True:
+            try:
+                buf = fsrc.read(buffer_size)
+            except OSError as e:
+                raise DistutilsFileError(f"could not read from '{src}': {e.strerror}")
+
+            if not buf:
+                break
+
+            try:
+                fdst.write(buf)
+            except OSError as e:
+                raise DistutilsFileError(f"could not write to '{dst}': {e.strerror}")
+    finally:
+        if fdst:
+            fdst.close()
+        if fsrc:
+            fsrc.close()
+
+
+def copy_file(  # noqa: C901
+    src,
+    dst,
+    preserve_mode=True,
+    preserve_times=True,
+    update=False,
+    link=None,
+    verbose=True,
+):
+    """Copy a file 'src' to 'dst'.  If 'dst' is a directory, then 'src' is
+    copied there with the same name; otherwise, it must be a filename.  (If
+    the file exists, it will be ruthlessly clobbered.)  If 'preserve_mode'
+    is true (the default), the file's mode (type and permission bits, or
+    whatever is analogous on the current platform) is copied.  If
+    'preserve_times' is true (the default), the last-modified and
+    last-access times are copied as well.  If 'update' is true, 'src' will
+    only be copied if 'dst' does not exist, or if 'dst' does exist but is
+    older than 'src'.
+
+    'link' allows you to make hard links (os.link) or symbolic links
+    (os.symlink) instead of copying: set it to "hard" or "sym"; if it is
+    None (the default), files are copied.  Don't set 'link' on systems that
+    don't support it: 'copy_file()' doesn't check if hard or symbolic
+    linking is available. If hardlink fails, falls back to
+    _copy_file_contents().
+
+    Under Mac OS, uses the native file copy function in macostools; on
+    other systems, uses '_copy_file_contents()' to copy file contents.
+
+    Return a tuple (dest_name, copied): 'dest_name' is the actual name of
+    the output file, and 'copied' is true if the file was copied.
+    """
+    # XXX if the destination file already exists, we clobber it if
+    # copying, but blow up if linking.  Hmmm.  And I don't know what
+    # macostools.copyfile() does.  Should definitely be consistent, and
+    # should probably blow up if destination exists and we would be
+    # changing it (ie. it's not already a hard/soft link to src OR
+    # (not update) and (src newer than dst).
+
+    from distutils._modified import newer
+    from stat import S_IMODE, ST_ATIME, ST_MODE, ST_MTIME
+
+    if not os.path.isfile(src):
+        raise DistutilsFileError(
+            f"can't copy '{src}': doesn't exist or not a regular file"
+        )
+
+    if os.path.isdir(dst):
+        dir = dst
+        dst = os.path.join(dst, os.path.basename(src))
+    else:
+        dir = os.path.dirname(dst)
+
+    if update and not newer(src, dst):
+        if verbose >= 1:
+            log.debug("not copying %s (output up-to-date)", src)
+        return (dst, False)
+
+    try:
+        action = _copy_action[link]
+    except KeyError:
+        raise ValueError(f"invalid value '{link}' for 'link' argument")
+
+    if verbose >= 1:
+        if os.path.basename(dst) == os.path.basename(src):
+            log.info("%s %s -> %s", action, src, dir)
+        else:
+            log.info("%s %s -> %s", action, src, dst)
+
+    # If linking (hard or symbolic), use the appropriate system call
+    # (Unix only, of course, but that's the caller's responsibility)
+    if link == 'hard':
+        if not (os.path.exists(dst) and os.path.samefile(src, dst)):
+            try:
+                os.link(src, dst)
+            except OSError:
+                # If hard linking fails, fall back on copying file
+                # (some special filesystems don't support hard linking
+                #  even under Unix, see issue #8876).
+                pass
+            else:
+                return (dst, True)
+    elif link == 'sym':
+        if not (os.path.exists(dst) and os.path.samefile(src, dst)):
+            os.symlink(src, dst)
+            return (dst, True)
+
+    # Otherwise (non-Mac, not linking), copy the file contents and
+    # (optionally) copy the times and mode.
+    _copy_file_contents(src, dst)
+    if preserve_mode or preserve_times:
+        st = os.stat(src)
+
+        # According to David Ascher <da@ski.org>, utime() should be done
+        # before chmod() (at least under NT).
+        if preserve_times:
+            os.utime(dst, (st[ST_ATIME], st[ST_MTIME]))
+        if preserve_mode:
+            os.chmod(dst, S_IMODE(st[ST_MODE]))
+
+    return (dst, True)
+
+
+# XXX I suspect this is Unix-specific -- need porting help!
+def move_file(src, dst, verbose=True):  # noqa: C901
+    """Move a file 'src' to 'dst'.  If 'dst' is a directory, the file will
+    be moved into it with the same name; otherwise, 'src' is just renamed
+    to 'dst'.  Return the new full name of the file.
+
+    Handles cross-device moves on Unix using 'copy_file()'.  What about
+    other systems???
+    """
+    import errno
+    from os.path import basename, dirname, exists, isdir, isfile
+
+    if verbose >= 1:
+        log.info("moving %s -> %s", src, dst)
+
+    if not isfile(src):
+        raise DistutilsFileError(f"can't move '{src}': not a regular file")
+
+    if isdir(dst):
+        dst = os.path.join(dst, basename(src))
+    elif exists(dst):
+        raise DistutilsFileError(
+            f"can't move '{src}': destination '{dst}' already exists"
+        )
+
+    if not isdir(dirname(dst)):
+        raise DistutilsFileError(
+            f"can't move '{src}': destination '{dst}' not a valid path"
+        )
+
+    copy_it = False
+    try:
+        os.rename(src, dst)
+    except OSError as e:
+        (num, msg) = e.args
+        if num == errno.EXDEV:
+            copy_it = True
+        else:
+            raise DistutilsFileError(f"couldn't move '{src}' to '{dst}': {msg}")
+
+    if copy_it:
+        copy_file(src, dst, verbose=verbose)
+        try:
+            os.unlink(src)
+        except OSError as e:
+            (num, msg) = e.args
+            try:
+                os.unlink(dst)
+            except OSError:
+                pass
+            raise DistutilsFileError(
+                f"couldn't move '{src}' to '{dst}' by copy/delete: "
+                f"delete '{src}' failed: {msg}"
+            )
+    return dst
+
+
+def write_file(filename, contents):
+    """Create a file with the specified name and write 'contents' (a
+    sequence of strings without line terminators) to it.
+    """
+    with open(filename, 'w', encoding='utf-8') as f:
+        f.writelines(line + '\n' for line in contents)

python/Lib/site-packages/setuptools/_distutils/filelist.py

@@ -0,0 +1,431 @@
+"""distutils.filelist
+
+Provides the FileList class, used for poking about the filesystem
+and building lists of files.
+"""
+
+from __future__ import annotations
+
+import fnmatch
+import functools
+import os
+import re
+from collections.abc import Iterable
+from typing import Literal, overload
+
+from ._log import log
+from .errors import DistutilsInternalError, DistutilsTemplateError
+from .util import convert_path
+
+
+class FileList:
+    """A list of files built by on exploring the filesystem and filtered by
+    applying various patterns to what we find there.
+
+    Instance attributes:
+      dir
+        directory from which files will be taken -- only used if
+        'allfiles' not supplied to constructor
+      files
+        list of filenames currently being built/filtered/manipulated
+      allfiles
+        complete list of files under consideration (ie. without any
+        filtering applied)
+    """
+
+    def __init__(self, warn: object = None, debug_print: object = None) -> None:
+        # ignore argument to FileList, but keep them for backwards
+        # compatibility
+        self.allfiles: Iterable[str] | None = None
+        self.files: list[str] = []
+
+    def set_allfiles(self, allfiles: Iterable[str]) -> None:
+        self.allfiles = allfiles
+
+    def findall(self, dir: str | os.PathLike[str] = os.curdir) -> None:
+        self.allfiles = findall(dir)
+
+    def debug_print(self, msg: object) -> None:
+        """Print 'msg' to stdout if the global DEBUG (taken from the
+        DISTUTILS_DEBUG environment variable) flag is true.
+        """
+        from distutils.debug import DEBUG
+
+        if DEBUG:
+            print(msg)
+
+    # Collection methods
+
+    def append(self, item: str) -> None:
+        self.files.append(item)
+
+    def extend(self, items: Iterable[str]) -> None:
+        self.files.extend(items)
+
+    def sort(self) -> None:
+        # Not a strict lexical sort!
+        sortable_files = sorted(map(os.path.split, self.files))
+        self.files = []
+        for sort_tuple in sortable_files:
+            self.files.append(os.path.join(*sort_tuple))
+
+    # Other miscellaneous utility methods
+
+    def remove_duplicates(self) -> None:
+        # Assumes list has been sorted!
+        for i in range(len(self.files) - 1, 0, -1):
+            if self.files[i] == self.files[i - 1]:
+                del self.files[i]
+
+    # "File template" methods
+
+    def _parse_template_line(self, line):
+        words = line.split()
+        action = words[0]
+
+        patterns = dir = dir_pattern = None
+
+        if action in ('include', 'exclude', 'global-include', 'global-exclude'):
+            if len(words) < 2:
+                raise DistutilsTemplateError(
+                    f"'{action}' expects <pattern1> <pattern2> ..."
+                )
+            patterns = [convert_path(w) for w in words[1:]]
+        elif action in ('recursive-include', 'recursive-exclude'):
+            if len(words) < 3:
+                raise DistutilsTemplateError(
+                    f"'{action}' expects <dir> <pattern1> <pattern2> ..."
+                )
+            dir = convert_path(words[1])
+            patterns = [convert_path(w) for w in words[2:]]
+        elif action in ('graft', 'prune'):
+            if len(words) != 2:
+                raise DistutilsTemplateError(
+                    f"'{action}' expects a single <dir_pattern>"
+                )
+            dir_pattern = convert_path(words[1])
+        else:
+            raise DistutilsTemplateError(f"unknown action '{action}'")
+
+        return (action, patterns, dir, dir_pattern)
+
+    def process_template_line(self, line: str) -> None:  # noqa: C901
+        # Parse the line: split it up, make sure the right number of words
+        # is there, and return the relevant words.  'action' is always
+        # defined: it's the first word of the line.  Which of the other
+        # three are defined depends on the action; it'll be either
+        # patterns, (dir and patterns), or (dir_pattern).
+        (action, patterns, dir, dir_pattern) = self._parse_template_line(line)
+
+        # OK, now we know that the action is valid and we have the
+        # right number of words on the line for that action -- so we
+        # can proceed with minimal error-checking.
+        if action == 'include':
+            self.debug_print("include " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.include_pattern(pattern, anchor=True):
+                    log.warning("warning: no files found matching '%s'", pattern)
+
+        elif action == 'exclude':
+            self.debug_print("exclude " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.exclude_pattern(pattern, anchor=True):
+                    log.warning(
+                        "warning: no previously-included files found matching '%s'",
+                        pattern,
+                    )
+
+        elif action == 'global-include':
+            self.debug_print("global-include " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.include_pattern(pattern, anchor=False):
+                    log.warning(
+                        (
+                            "warning: no files found matching '%s' "
+                            "anywhere in distribution"
+                        ),
+                        pattern,
+                    )
+
+        elif action == 'global-exclude':
+            self.debug_print("global-exclude " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.exclude_pattern(pattern, anchor=False):
+                    log.warning(
+                        (
+                            "warning: no previously-included files matching "
+                            "'%s' found anywhere in distribution"
+                        ),
+                        pattern,
+                    )
+
+        elif action == 'recursive-include':
+            self.debug_print("recursive-include {} {}".format(dir, ' '.join(patterns)))
+            for pattern in patterns:
+                if not self.include_pattern(pattern, prefix=dir):
+                    msg = "warning: no files found matching '%s' under directory '%s'"
+                    log.warning(msg, pattern, dir)
+
+        elif action == 'recursive-exclude':
+            self.debug_print("recursive-exclude {} {}".format(dir, ' '.join(patterns)))
+            for pattern in patterns:
+                if not self.exclude_pattern(pattern, prefix=dir):
+                    log.warning(
+                        (
+                            "warning: no previously-included files matching "
+                            "'%s' found under directory '%s'"
+                        ),
+                        pattern,
+                        dir,
+                    )
+
+        elif action == 'graft':
+            self.debug_print("graft " + dir_pattern)
+            if not self.include_pattern(None, prefix=dir_pattern):
+                log.warning("warning: no directories found matching '%s'", dir_pattern)
+
+        elif action == 'prune':
+            self.debug_print("prune " + dir_pattern)
+            if not self.exclude_pattern(None, prefix=dir_pattern):
+                log.warning(
+                    ("no previously-included directories found matching '%s'"),
+                    dir_pattern,
+                )
+        else:
+            raise DistutilsInternalError(
+                f"this cannot happen: invalid action '{action}'"
+            )
+
+    # Filtering/selection methods
+    @overload
+    def include_pattern(
+        self,
+        pattern: str,
+        anchor: bool = True,
+        prefix: str | None = None,
+        is_regex: Literal[False] = False,
+    ) -> bool: ...
+    @overload
+    def include_pattern(
+        self,
+        pattern: str | re.Pattern[str],
+        anchor: bool = True,
+        prefix: str | None = None,
+        *,
+        is_regex: Literal[True],
+    ) -> bool: ...
+    @overload
+    def include_pattern(
+        self,
+        pattern: str | re.Pattern[str],
+        anchor: bool,
+        prefix: str | None,
+        is_regex: Literal[True],
+    ) -> bool: ...
+    def include_pattern(
+        self,
+        pattern: str | re.Pattern,
+        anchor: bool = True,
+        prefix: str | None = None,
+        is_regex: bool = False,
+    ) -> bool:
+        """Select strings (presumably filenames) from 'self.files' that
+        match 'pattern', a Unix-style wildcard (glob) pattern.  Patterns
+        are not quite the same as implemented by the 'fnmatch' module: '*'
+        and '?'  match non-special characters, where "special" is platform-
+        dependent: slash on Unix; colon, slash, and backslash on
+        DOS/Windows; and colon on Mac OS.
+
+        If 'anchor' is true (the default), then the pattern match is more
+        stringent: "*.py" will match "foo.py" but not "foo/bar.py".  If
+        'anchor' is false, both of these will match.
+
+        If 'prefix' is supplied, then only filenames starting with 'prefix'
+        (itself a pattern) and ending with 'pattern', with anything in between
+        them, will match.  'anchor' is ignored in this case.
+
+        If 'is_regex' is true, 'anchor' and 'prefix' are ignored, and
+        'pattern' is assumed to be either a string containing a regex or a
+        regex object -- no translation is done, the regex is just compiled
+        and used as-is.
+
+        Selected strings will be added to self.files.
+
+        Return True if files are found, False otherwise.
+        """
+        # XXX docstring lying about what the special chars are?
+        files_found = False
+        pattern_re = translate_pattern(pattern, anchor, prefix, is_regex)
+        self.debug_print(f"include_pattern: applying regex r'{pattern_re.pattern}'")
+
+        # delayed loading of allfiles list
+        if self.allfiles is None:
+            self.findall()
+
+        for name in self.allfiles:
+            if pattern_re.search(name):
+                self.debug_print(" adding " + name)
+                self.files.append(name)
+                files_found = True
+        return files_found
+
+    @overload
+    def exclude_pattern(
+        self,
+        pattern: str,
+        anchor: bool = True,
+        prefix: str | None = None,
+        is_regex: Literal[False] = False,
+    ) -> bool: ...
+    @overload
+    def exclude_pattern(
+        self,
+        pattern: str | re.Pattern[str],
+        anchor: bool = True,
+        prefix: str | None = None,
+        *,
+        is_regex: Literal[True],
+    ) -> bool: ...
+    @overload
+    def exclude_pattern(
+        self,
+        pattern: str | re.Pattern[str],
+        anchor: bool,
+        prefix: str | None,
+        is_regex: Literal[True],
+    ) -> bool: ...
+    def exclude_pattern(
+        self,
+        pattern: str | re.Pattern,
+        anchor: bool = True,
+        prefix: str | None = None,
+        is_regex: bool = False,
+    ) -> bool:
+        """Remove strings (presumably filenames) from 'files' that match
+        'pattern'.  Other parameters are the same as for
+        'include_pattern()', above.
+        The list 'self.files' is modified in place.
+        Return True if files are found, False otherwise.
+        """
+        files_found = False
+        pattern_re = translate_pattern(pattern, anchor, prefix, is_regex)
+        self.debug_print(f"exclude_pattern: applying regex r'{pattern_re.pattern}'")
+        for i in range(len(self.files) - 1, -1, -1):
+            if pattern_re.search(self.files[i]):
+                self.debug_print(" removing " + self.files[i])
+                del self.files[i]
+                files_found = True
+        return files_found
+
+
+# Utility functions
+
+
+def _find_all_simple(path):
+    """
+    Find all files under 'path'
+    """
+    all_unique = _UniqueDirs.filter(os.walk(path, followlinks=True))
+    results = (
+        os.path.join(base, file) for base, dirs, files in all_unique for file in files
+    )
+    return filter(os.path.isfile, results)
+
+
+class _UniqueDirs(set):
+    """
+    Exclude previously-seen dirs from walk results,
+    avoiding infinite recursion.
+    Ref https://bugs.python.org/issue44497.
+    """
+
+    def __call__(self, walk_item):
+        """
+        Given an item from an os.walk result, determine
+        if the item represents a unique dir for this instance
+        and if not, prevent further traversal.
+        """
+        base, dirs, files = walk_item
+        stat = os.stat(base)
+        candidate = stat.st_dev, stat.st_ino
+        found = candidate in self
+        if found:
+            del dirs[:]
+        self.add(candidate)
+        return not found
+
+    @classmethod
+    def filter(cls, items):
+        return filter(cls(), items)
+
+
+def findall(dir: str | os.PathLike[str] = os.curdir):
+    """
+    Find all files under 'dir' and return the list of full filenames.
+    Unless dir is '.', return full filenames with dir prepended.
+    """
+    files = _find_all_simple(dir)
+    if dir == os.curdir:
+        make_rel = functools.partial(os.path.relpath, start=dir)
+        files = map(make_rel, files)
+    return list(files)
+
+
+def glob_to_re(pattern):
+    """Translate a shell-like glob pattern to a regular expression; return
+    a string containing the regex.  Differs from 'fnmatch.translate()' in
+    that '*' does not match "special characters" (which are
+    platform-specific).
+    """
+    pattern_re = fnmatch.translate(pattern)
+
+    # '?' and '*' in the glob pattern become '.' and '.*' in the RE, which
+    # IMHO is wrong -- '?' and '*' aren't supposed to match slash in Unix,
+    # and by extension they shouldn't match such "special characters" under
+    # any OS.  So change all non-escaped dots in the RE to match any
+    # character except the special characters (currently: just os.sep).
+    sep = os.sep
+    if os.sep == '\\':
+        # we're using a regex to manipulate a regex, so we need
+        # to escape the backslash twice
+        sep = r'\\\\'
+    escaped = rf'\1[^{sep}]'
+    pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', escaped, pattern_re)
+    return pattern_re
+
+
+def translate_pattern(pattern, anchor=True, prefix=None, is_regex=False):
+    """Translate a shell-like wildcard pattern to a compiled regular
+    expression.  Return the compiled regex.  If 'is_regex' true,
+    then 'pattern' is directly compiled to a regex (if it's a string)
+    or just returned as-is (assumes it's a regex object).
+    """
+    if is_regex:
+        if isinstance(pattern, str):
+            return re.compile(pattern)
+        else:
+            return pattern
+
+    # ditch start and end characters
+    start, _, end = glob_to_re('_').partition('_')
+
+    if pattern:
+        pattern_re = glob_to_re(pattern)
+        assert pattern_re.startswith(start) and pattern_re.endswith(end)
+    else:
+        pattern_re = ''
+
+    if prefix is not None:
+        prefix_re = glob_to_re(prefix)
+        assert prefix_re.startswith(start) and prefix_re.endswith(end)
+        prefix_re = prefix_re[len(start) : len(prefix_re) - len(end)]
+        sep = os.sep
+        if os.sep == '\\':
+            sep = r'\\'
+        pattern_re = pattern_re[len(start) : len(pattern_re) - len(end)]
+        pattern_re = rf'{start}\A{prefix_re}{sep}.*{pattern_re}{end}'
+    else:  # no prefix -- respect anchor flag
+        if anchor:
+            pattern_re = rf'{start}\A{pattern_re[len(start) :]}'
+
+    return re.compile(pattern_re)

python/Lib/site-packages/setuptools/_distutils/log.py

@@ -0,0 +1,56 @@
+"""
+A simple log mechanism styled after PEP 282.
+
+Retained for compatibility and should not be used.
+"""
+
+import logging
+import warnings
+
+from ._log import log as _global_log
+
+DEBUG = logging.DEBUG
+INFO = logging.INFO
+WARN = logging.WARN
+ERROR = logging.ERROR
+FATAL = logging.FATAL
+
+log = _global_log.log
+debug = _global_log.debug
+info = _global_log.info
+warn = _global_log.warning
+error = _global_log.error
+fatal = _global_log.fatal
+
+
+def set_threshold(level):
+    orig = _global_log.level
+    _global_log.setLevel(level)
+    return orig
+
+
+def set_verbosity(v):
+    if v <= 0:
+        set_threshold(logging.WARN)
+    elif v == 1:
+        set_threshold(logging.INFO)
+    elif v >= 2:
+        set_threshold(logging.DEBUG)
+
+
+class Log(logging.Logger):
+    """distutils.log.Log is deprecated, please use an alternative from `logging`."""
+
+    def __init__(self, threshold=WARN):
+        warnings.warn(Log.__doc__)  # avoid DeprecationWarning to ensure warn is shown
+        super().__init__(__name__, level=threshold)
+
+    @property
+    def threshold(self):
+        return self.level
+
+    @threshold.setter
+    def threshold(self, level):
+        self.setLevel(level)
+
+    warn = logging.Logger.warning

python/Lib/site-packages/setuptools/_distutils/spawn.py

@@ -0,0 +1,130 @@
+"""distutils.spawn
+
+Provides the 'spawn()' function, a front-end to various platform-
+specific functions for launching another program in a sub-process.
+"""
+
+from __future__ import annotations
+
+import os
+import platform
+import shutil
+import subprocess
+import sys
+import warnings
+from collections.abc import Mapping, MutableSequence
+from typing import TYPE_CHECKING, TypeVar, overload
+
+from ._log import log
+from .debug import DEBUG
+from .errors import DistutilsExecError
+
+if TYPE_CHECKING:
+    from subprocess import _ENV
+
+
+_MappingT = TypeVar("_MappingT", bound=Mapping)
+
+
+def _debug(cmd):
+    """
+    Render a subprocess command differently depending on DEBUG.
+    """
+    return cmd if DEBUG else cmd[0]
+
+
+def _inject_macos_ver(env: _MappingT | None) -> _MappingT | dict[str, str | int] | None:
+    if platform.system() != 'Darwin':
+        return env
+
+    from .util import MACOSX_VERSION_VAR, get_macosx_target_ver
+
+    target_ver = get_macosx_target_ver()
+    update = {MACOSX_VERSION_VAR: target_ver} if target_ver else {}
+    return {**_resolve(env), **update}
+
+
+@overload
+def _resolve(env: None) -> os._Environ[str]: ...
+@overload
+def _resolve(env: _MappingT) -> _MappingT: ...
+def _resolve(env: _MappingT | None) -> _MappingT | os._Environ[str]:
+    return os.environ if env is None else env
+
+
+def spawn(
+    cmd: MutableSequence[bytes | str | os.PathLike[str]],
+    search_path: bool = True,
+    verbose: bool = False,
+    env: _ENV | None = None,
+) -> None:
+    """Run another program, specified as a command list 'cmd', in a new process.
+
+    'cmd' is just the argument list for the new process, ie.
+    cmd[0] is the program to run and cmd[1:] are the rest of its arguments.
+    There is no way to run a program with a name different from that of its
+    executable.
+
+    If 'search_path' is true (the default), the system's executable
+    search path will be used to find the program; otherwise, cmd[0]
+    must be the exact path to the executable.
+
+    Raise DistutilsExecError if running the program fails in any way; just
+    return on success.
+    """
+    log.info(subprocess.list2cmdline(cmd))
+
+    if search_path:
+        executable = shutil.which(cmd[0])
+        if executable is not None:
+            cmd[0] = executable
+
+    try:
+        subprocess.check_call(cmd, env=_inject_macos_ver(env))
+    except OSError as exc:
+        raise DistutilsExecError(
+            f"command {_debug(cmd)!r} failed: {exc.args[-1]}"
+        ) from exc
+    except subprocess.CalledProcessError as err:
+        raise DistutilsExecError(
+            f"command {_debug(cmd)!r} failed with exit code {err.returncode}"
+        ) from err
+
+
+def find_executable(executable: str, path: str | None = None) -> str | None:
+    """Tries to find 'executable' in the directories listed in 'path'.
+
+    A string listing directories separated by 'os.pathsep'; defaults to
+    os.environ['PATH'].  Returns the complete filename or None if not found.
+    """
+    warnings.warn(
+        'Use shutil.which instead of find_executable', DeprecationWarning, stacklevel=2
+    )
+    _, ext = os.path.splitext(executable)
+    if (sys.platform == 'win32') and (ext != '.exe'):
+        executable = executable + '.exe'
+
+    if os.path.isfile(executable):
+        return executable
+
+    if path is None:
+        path = os.environ.get('PATH', None)
+        # bpo-35755: Don't fall through if PATH is the empty string
+        if path is None:
+            try:
+                path = os.confstr("CS_PATH")
+            except (AttributeError, ValueError):
+                # os.confstr() or CS_PATH is not available
+                path = os.defpath
+
+    # PATH='' doesn't match, whereas PATH=':' looks in the current directory
+    if not path:
+        return None
+
+    paths = path.split(os.pathsep)
+    for p in paths:
+        f = os.path.join(p, executable)
+        if os.path.isfile(f):
+            # the file exists, we have a shot at spawn working
+            return f
+    return None

python/Lib/site-packages/setuptools/_distutils/sysconfig.py

@@ -0,0 +1,598 @@
+"""Provide access to Python's configuration information.  The specific
+configuration variables available depend heavily on the platform and
+configuration.  The values may be retrieved using
+get_config_var(name), and the list of variables is available via
+get_config_vars().keys().  Additional convenience functions are also
+available.
+
+Written by:   Fred L. Drake, Jr.
+Email:        <fdrake@acm.org>
+"""
+
+from __future__ import annotations
+
+import functools
+import os
+import pathlib
+import re
+import sys
+import sysconfig
+from typing import TYPE_CHECKING, Literal, overload
+
+from jaraco.functools import pass_none
+
+from .ccompiler import CCompiler
+from .compat import py39
+from .errors import DistutilsPlatformError
+from .util import is_mingw
+
+if TYPE_CHECKING:
+    from typing_extensions import deprecated
+else:
+
+    def deprecated(message):
+        return lambda fn: fn
+
+
+IS_PYPY = '__pypy__' in sys.builtin_module_names
+
+# These are needed in a couple of spots, so just compute them once.
+PREFIX = os.path.normpath(sys.prefix)
+EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
+BASE_PREFIX = os.path.normpath(sys.base_prefix)
+BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
+
+# Path to the base directory of the project. On Windows the binary may
+# live in project/PCbuild/win32 or project/PCbuild/amd64.
+# set for cross builds
+if "_PYTHON_PROJECT_BASE" in os.environ:
+    project_base = os.path.abspath(os.environ["_PYTHON_PROJECT_BASE"])
+else:
+    if sys.executable:
+        project_base = os.path.dirname(os.path.abspath(sys.executable))
+    else:
+        # sys.executable can be empty if argv[0] has been changed and Python is
+        # unable to retrieve the real program name
+        project_base = os.getcwd()
+
+
+def _is_python_source_dir(d):
+    """
+    Return True if the target directory appears to point to an
+    un-installed Python.
+    """
+    modules = pathlib.Path(d).joinpath('Modules')
+    return any(modules.joinpath(fn).is_file() for fn in ('Setup', 'Setup.local'))
+
+
+_sys_home = getattr(sys, '_home', None)
+
+
+def _is_parent(dir_a, dir_b):
+    """
+    Return True if a is a parent of b.
+    """
+    return os.path.normcase(dir_a).startswith(os.path.normcase(dir_b))
+
+
+if os.name == 'nt':
+
+    @pass_none
+    def _fix_pcbuild(d):
+        # In a venv, sys._home will be inside BASE_PREFIX rather than PREFIX.
+        prefixes = PREFIX, BASE_PREFIX
+        matched = (
+            prefix
+            for prefix in prefixes
+            if _is_parent(d, os.path.join(prefix, "PCbuild"))
+        )
+        return next(matched, d)
+
+    project_base = _fix_pcbuild(project_base)
+    _sys_home = _fix_pcbuild(_sys_home)
+
+
+def _python_build():
+    if _sys_home:
+        return _is_python_source_dir(_sys_home)
+    return _is_python_source_dir(project_base)
+
+
+python_build = _python_build()
+
+
+# Calculate the build qualifier flags if they are defined.  Adding the flags
+# to the include and lib directories only makes sense for an installation, not
+# an in-source build.
+build_flags = ''
+try:
+    if not python_build:
+        build_flags = sys.abiflags
+except AttributeError:
+    # It's not a configure-based build, so the sys module doesn't have
+    # this attribute, which is fine.
+    pass
+
+
+def get_python_version():
+    """Return a string containing the major and minor Python version,
+    leaving off the patchlevel.  Sample return values could be '1.5'
+    or '2.2'.
+    """
+    return f'{sys.version_info.major}.{sys.version_info.minor}'
+
+
+def get_python_inc(plat_specific: bool = False, prefix: str | None = None) -> str:
+    """Return the directory containing installed Python header files.
+
+    If 'plat_specific' is false (the default), this is the path to the
+    non-platform-specific header files, i.e. Python.h and so on;
+    otherwise, this is the path to platform-specific header files
+    (namely pyconfig.h).
+
+    If 'prefix' is supplied, use it instead of sys.base_prefix or
+    sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
+    """
+    default_prefix = BASE_EXEC_PREFIX if plat_specific else BASE_PREFIX
+    resolved_prefix = prefix if prefix is not None else default_prefix
+    # MinGW imitates posix like layout, but os.name != posix
+    os_name = "posix" if is_mingw() else os.name
+    try:
+        getter = globals()[f'_get_python_inc_{os_name}']
+    except KeyError:
+        raise DistutilsPlatformError(
+            "I don't know where Python installs its C header files "
+            f"on platform '{os.name}'"
+        )
+    return getter(resolved_prefix, prefix, plat_specific)
+
+
+@pass_none
+def _extant(path):
+    """
+    Replace path with None if it doesn't exist.
+    """
+    return path if os.path.exists(path) else None
+
+
+def _get_python_inc_posix(prefix, spec_prefix, plat_specific):
+    return (
+        _get_python_inc_posix_python(plat_specific)
+        or _extant(_get_python_inc_from_config(plat_specific, spec_prefix))
+        or _get_python_inc_posix_prefix(prefix)
+    )
+
+
+def _get_python_inc_posix_python(plat_specific):
+    """
+    Assume the executable is in the build directory. The
+    pyconfig.h file should be in the same directory. Since
+    the build directory may not be the source directory,
+    use "srcdir" from the makefile to find the "Include"
+    directory.
+    """
+    if not python_build:
+        return
+    if plat_specific:
+        return _sys_home or project_base
+    incdir = os.path.join(get_config_var('srcdir'), 'Include')
+    return os.path.normpath(incdir)
+
+
+def _get_python_inc_from_config(plat_specific, spec_prefix):
+    """
+    If no prefix was explicitly specified, provide the include
+    directory from the config vars. Useful when
+    cross-compiling, since the config vars may come from
+    the host
+    platform Python installation, while the current Python
+    executable is from the build platform installation.
+
+    >>> monkeypatch = getfixture('monkeypatch')
+    >>> gpifc = _get_python_inc_from_config
+    >>> monkeypatch.setitem(gpifc.__globals__, 'get_config_var', str.lower)
+    >>> gpifc(False, '/usr/bin/')
+    >>> gpifc(False, '')
+    >>> gpifc(False, None)
+    'includepy'
+    >>> gpifc(True, None)
+    'confincludepy'
+    """
+    if spec_prefix is None:
+        return get_config_var('CONF' * plat_specific + 'INCLUDEPY')
+
+
+def _get_python_inc_posix_prefix(prefix):
+    implementation = 'pypy' if IS_PYPY else 'python'
+    python_dir = implementation + get_python_version() + build_flags
+    return os.path.join(prefix, "include", python_dir)
+
+
+def _get_python_inc_nt(prefix, spec_prefix, plat_specific):
+    if python_build:
+        # Include both include dirs to ensure we can find pyconfig.h
+        return (
+            os.path.join(prefix, "include")
+            + os.path.pathsep
+            + os.path.dirname(sysconfig.get_config_h_filename())
+        )
+    return os.path.join(prefix, "include")
+
+
+# allow this behavior to be monkey-patched. Ref pypa/distutils#2.
+def _posix_lib(standard_lib, libpython, early_prefix, prefix):
+    if standard_lib:
+        return libpython
+    else:
+        return os.path.join(libpython, "site-packages")
+
+
+def get_python_lib(
+    plat_specific: bool = False, standard_lib: bool = False, prefix: str | None = None
+) -> str:
+    """Return the directory containing the Python library (standard or
+    site additions).
+
+    If 'plat_specific' is true, return the directory containing
+    platform-specific modules, i.e. any module from a non-pure-Python
+    module distribution; otherwise, return the platform-shared library
+    directory.  If 'standard_lib' is true, return the directory
+    containing standard Python library modules; otherwise, return the
+    directory for site-specific modules.
+
+    If 'prefix' is supplied, use it instead of sys.base_prefix or
+    sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
+    """
+
+    early_prefix = prefix
+
+    if prefix is None:
+        if standard_lib:
+            prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
+        else:
+            prefix = plat_specific and EXEC_PREFIX or PREFIX
+
+    if os.name == "posix" or is_mingw():
+        if plat_specific or standard_lib:
+            # Platform-specific modules (any module from a non-pure-Python
+            # module distribution) or standard Python library modules.
+            libdir = getattr(sys, "platlibdir", "lib")
+        else:
+            # Pure Python
+            libdir = "lib"
+        implementation = 'pypy' if IS_PYPY else 'python'
+        libpython = os.path.join(prefix, libdir, implementation + get_python_version())
+        return _posix_lib(standard_lib, libpython, early_prefix, prefix)
+    elif os.name == "nt":
+        if standard_lib:
+            return os.path.join(prefix, "Lib")
+        else:
+            return os.path.join(prefix, "Lib", "site-packages")
+    else:
+        raise DistutilsPlatformError(
+            f"I don't know where Python installs its library on platform '{os.name}'"
+        )
+
+
+@functools.lru_cache
+def _customize_macos():
+    """
+    Perform first-time customization of compiler-related
+    config vars on macOS. Use after a compiler is known
+    to be needed. This customization exists primarily to support Pythons
+    from binary installers. The kind and paths to build tools on
+    the user system may vary significantly from the system
+    that Python itself was built on.  Also the user OS
+    version and build tools may not support the same set
+    of CPU architectures for universal builds.
+    """
+
+    sys.platform == "darwin" and __import__('_osx_support').customize_compiler(
+        get_config_vars()
+    )
+
+
+def customize_compiler(compiler: CCompiler) -> None:
+    """Do any platform-specific customization of a CCompiler instance.
+
+    Mainly needed on Unix, so we can plug in the information that
+    varies across Unices and is stored in Python's Makefile.
+    """
+    if compiler.compiler_type in ["unix", "cygwin"] or (
+        compiler.compiler_type == "mingw32" and is_mingw()
+    ):
+        _customize_macos()
+
+        (
+            cc,
+            cxx,
+            cflags,
+            ccshared,
+            ldshared,
+            ldcxxshared,
+            shlib_suffix,
+            ar,
+            ar_flags,
+        ) = get_config_vars(
+            'CC',
+            'CXX',
+            'CFLAGS',
+            'CCSHARED',
+            'LDSHARED',
+            'LDCXXSHARED',
+            'SHLIB_SUFFIX',
+            'AR',
+            'ARFLAGS',
+        )
+
+        cxxflags = cflags
+
+        if 'CC' in os.environ:
+            newcc = os.environ['CC']
+            if 'LDSHARED' not in os.environ and ldshared.startswith(cc):
+                # If CC is overridden, use that as the default
+                #       command for LDSHARED as well
+                ldshared = newcc + ldshared[len(cc) :]
+            cc = newcc
+        cxx = os.environ.get('CXX', cxx)
+        ldshared = os.environ.get('LDSHARED', ldshared)
+        ldcxxshared = os.environ.get('LDCXXSHARED', ldcxxshared)
+        cpp = os.environ.get(
+            'CPP',
+            cc + " -E",  # not always
+        )
+
+        ldshared = _add_flags(ldshared, 'LD')
+        ldcxxshared = _add_flags(ldcxxshared, 'LD')
+        cflags = os.environ.get('CFLAGS', cflags)
+        ldshared = _add_flags(ldshared, 'C')
+        cxxflags = os.environ.get('CXXFLAGS', cxxflags)
+        ldcxxshared = _add_flags(ldcxxshared, 'CXX')
+        cpp = _add_flags(cpp, 'CPP')
+        cflags = _add_flags(cflags, 'CPP')
+        cxxflags = _add_flags(cxxflags, 'CPP')
+        ldshared = _add_flags(ldshared, 'CPP')
+        ldcxxshared = _add_flags(ldcxxshared, 'CPP')
+
+        ar = os.environ.get('AR', ar)
+
+        archiver = ar + ' ' + os.environ.get('ARFLAGS', ar_flags)
+        cc_cmd = cc + ' ' + cflags
+        cxx_cmd = cxx + ' ' + cxxflags
+
+        compiler.set_executables(
+            preprocessor=cpp,
+            compiler=cc_cmd,
+            compiler_so=cc_cmd + ' ' + ccshared,
+            compiler_cxx=cxx_cmd,
+            compiler_so_cxx=cxx_cmd + ' ' + ccshared,
+            linker_so=ldshared,
+            linker_so_cxx=ldcxxshared,
+            linker_exe=cc,
+            linker_exe_cxx=cxx,
+            archiver=archiver,
+        )
+
+        if 'RANLIB' in os.environ and compiler.executables.get('ranlib', None):
+            compiler.set_executables(ranlib=os.environ['RANLIB'])
+
+        compiler.shared_lib_extension = shlib_suffix
+
+
+def get_config_h_filename() -> str:
+    """Return full pathname of installed pyconfig.h file."""
+    return sysconfig.get_config_h_filename()
+
+
+def get_makefile_filename() -> str:
+    """Return full pathname of installed Makefile from the Python build."""
+    return sysconfig.get_makefile_filename()
+
+
+def parse_config_h(fp, g=None):
+    """Parse a config.h-style file.
+
+    A dictionary containing name/value pairs is returned.  If an
+    optional dictionary is passed in as the second argument, it is
+    used instead of a new dictionary.
+    """
+    return sysconfig.parse_config_h(fp, vars=g)
+
+
+# Regexes needed for parsing Makefile (and similar syntaxes,
+# like old-style Setup files).
+_variable_rx = re.compile(r"([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)")
+_findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
+_findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
+
+
+def parse_makefile(fn, g=None):  # noqa: C901
+    """Parse a Makefile-style file.
+
+    A dictionary containing name/value pairs is returned.  If an
+    optional dictionary is passed in as the second argument, it is
+    used instead of a new dictionary.
+    """
+    from distutils.text_file import TextFile
+
+    fp = TextFile(
+        fn,
+        strip_comments=True,
+        skip_blanks=True,
+        join_lines=True,
+        errors="surrogateescape",
+    )
+
+    if g is None:
+        g = {}
+    done = {}
+    notdone = {}
+
+    while True:
+        line = fp.readline()
+        if line is None:  # eof
+            break
+        m = _variable_rx.match(line)
+        if m:
+            n, v = m.group(1, 2)
+            v = v.strip()
+            # `$$' is a literal `$' in make
+            tmpv = v.replace('$$', '')
+
+            if "$" in tmpv:
+                notdone[n] = v
+            else:
+                try:
+                    v = int(v)
+                except ValueError:
+                    # insert literal `$'
+                    done[n] = v.replace('$$', '$')
+                else:
+                    done[n] = v
+
+    # Variables with a 'PY_' prefix in the makefile. These need to
+    # be made available without that prefix through sysconfig.
+    # Special care is needed to ensure that variable expansion works, even
+    # if the expansion uses the name without a prefix.
+    renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS')
+
+    # do variable interpolation here
+    while notdone:
+        for name in list(notdone):
+            value = notdone[name]
+            m = _findvar1_rx.search(value) or _findvar2_rx.search(value)
+            if m:
+                n = m.group(1)
+                found = True
+                if n in done:
+                    item = str(done[n])
+                elif n in notdone:
+                    # get it on a subsequent round
+                    found = False
+                elif n in os.environ:
+                    # do it like make: fall back to environment
+                    item = os.environ[n]
+
+                elif n in renamed_variables:
+                    if name.startswith('PY_') and name[3:] in renamed_variables:
+                        item = ""
+
+                    elif 'PY_' + n in notdone:
+                        found = False
+
+                    else:
+                        item = str(done['PY_' + n])
+                else:
+                    done[n] = item = ""
+                if found:
+                    after = value[m.end() :]
+                    value = value[: m.start()] + item + after
+                    if "$" in after:
+                        notdone[name] = value
+                    else:
+                        try:
+                            value = int(value)
+                        except ValueError:
+                            done[name] = value.strip()
+                        else:
+                            done[name] = value
+                        del notdone[name]
+
+                        if name.startswith('PY_') and name[3:] in renamed_variables:
+                            name = name[3:]
+                            if name not in done:
+                                done[name] = value
+            else:
+                # bogus variable reference; just drop it since we can't deal
+                del notdone[name]
+
+    fp.close()
+
+    # strip spurious spaces
+    for k, v in done.items():
+        if isinstance(v, str):
+            done[k] = v.strip()
+
+    # save the results in the global dictionary
+    g.update(done)
+    return g
+
+
+def expand_makefile_vars(s, vars):
+    """Expand Makefile-style variables -- "${foo}" or "$(foo)" -- in
+    'string' according to 'vars' (a dictionary mapping variable names to
+    values).  Variables not present in 'vars' are silently expanded to the
+    empty string.  The variable values in 'vars' should not contain further
+    variable expansions; if 'vars' is the output of 'parse_makefile()',
+    you're fine.  Returns a variable-expanded version of 's'.
+    """
+
+    # This algorithm does multiple expansion, so if vars['foo'] contains
+    # "${bar}", it will expand ${foo} to ${bar}, and then expand
+    # ${bar}... and so forth.  This is fine as long as 'vars' comes from
+    # 'parse_makefile()', which takes care of such expansions eagerly,
+    # according to make's variable expansion semantics.
+
+    while True:
+        m = _findvar1_rx.search(s) or _findvar2_rx.search(s)
+        if m:
+            (beg, end) = m.span()
+            s = s[0:beg] + vars.get(m.group(1)) + s[end:]
+        else:
+            break
+    return s
+
+
+_config_vars = None
+
+
+@overload
+def get_config_vars() -> dict[str, str | int]: ...
+@overload
+def get_config_vars(arg: str, /, *args: str) -> list[str | int]: ...
+def get_config_vars(*args: str) -> list[str | int] | dict[str, str | int]:
+    """With no arguments, return a dictionary of all configuration
+    variables relevant for the current platform.  Generally this includes
+    everything needed to build extensions and install both pure modules and
+    extensions.  On Unix, this means every variable defined in Python's
+    installed Makefile; on Windows it's a much smaller set.
+
+    With arguments, return a list of values that result from looking up
+    each argument in the configuration variable dictionary.
+    """
+    global _config_vars
+    if _config_vars is None:
+        _config_vars = sysconfig.get_config_vars().copy()
+        py39.add_ext_suffix(_config_vars)
+
+    return [_config_vars.get(name) for name in args] if args else _config_vars
+
+
+@overload
+@deprecated(
+    "SO is deprecated, use EXT_SUFFIX. Support will be removed when this module is synchronized with stdlib Python 3.11"
+)
+def get_config_var(name: Literal["SO"]) -> int | str | None: ...
+@overload
+def get_config_var(name: str) -> int | str | None: ...
+def get_config_var(name: str) -> int | str | None:
+    """Return the value of a single variable using the dictionary
+    returned by 'get_config_vars()'.  Equivalent to
+    get_config_vars().get(name)
+    """
+    if name == 'SO':
+        import warnings
+
+        warnings.warn('SO is deprecated, use EXT_SUFFIX', DeprecationWarning, 2)
+    return get_config_vars().get(name)
+
+
+@pass_none
+def _add_flags(value: str, type: str) -> str:
+    """
+    Add any flags from the environment for the given type.
+
+    type is the prefix to FLAGS in the environment key (e.g. "C" for "CFLAGS").
+    """
+    flags = os.environ.get(f'{type}FLAGS')
+    return f'{value} {flags}' if flags else value

python/Lib/site-packages/setuptools/_distutils/text_file.py

@@ -0,0 +1,286 @@
+"""text_file
+
+provides the TextFile class, which gives an interface to text files
+that (optionally) takes care of stripping comments, ignoring blank
+lines, and joining lines with backslashes."""
+
+import sys
+
+
+class TextFile:
+    """Provides a file-like object that takes care of all the things you
+    commonly want to do when processing a text file that has some
+    line-by-line syntax: strip comments (as long as "#" is your
+    comment character), skip blank lines, join adjacent lines by
+    escaping the newline (ie. backslash at end of line), strip
+    leading and/or trailing whitespace.  All of these are optional
+    and independently controllable.
+
+    Provides a 'warn()' method so you can generate warning messages that
+    report physical line number, even if the logical line in question
+    spans multiple physical lines.  Also provides 'unreadline()' for
+    implementing line-at-a-time lookahead.
+
+    Constructor is called as:
+
+        TextFile (filename=None, file=None, **options)
+
+    It bombs (RuntimeError) if both 'filename' and 'file' are None;
+    'filename' should be a string, and 'file' a file object (or
+    something that provides 'readline()' and 'close()' methods).  It is
+    recommended that you supply at least 'filename', so that TextFile
+    can include it in warning messages.  If 'file' is not supplied,
+    TextFile creates its own using 'io.open()'.
+
+    The options are all boolean, and affect the value returned by
+    'readline()':
+      strip_comments [default: true]
+        strip from "#" to end-of-line, as well as any whitespace
+        leading up to the "#" -- unless it is escaped by a backslash
+      lstrip_ws [default: false]
+        strip leading whitespace from each line before returning it
+      rstrip_ws [default: true]
+        strip trailing whitespace (including line terminator!) from
+        each line before returning it
+      skip_blanks [default: true}
+        skip lines that are empty *after* stripping comments and
+        whitespace.  (If both lstrip_ws and rstrip_ws are false,
+        then some lines may consist of solely whitespace: these will
+        *not* be skipped, even if 'skip_blanks' is true.)
+      join_lines [default: false]
+        if a backslash is the last non-newline character on a line
+        after stripping comments and whitespace, join the following line
+        to it to form one "logical line"; if N consecutive lines end
+        with a backslash, then N+1 physical lines will be joined to
+        form one logical line.
+      collapse_join [default: false]
+        strip leading whitespace from lines that are joined to their
+        predecessor; only matters if (join_lines and not lstrip_ws)
+      errors [default: 'strict']
+        error handler used to decode the file content
+
+    Note that since 'rstrip_ws' can strip the trailing newline, the
+    semantics of 'readline()' must differ from those of the builtin file
+    object's 'readline()' method!  In particular, 'readline()' returns
+    None for end-of-file: an empty string might just be a blank line (or
+    an all-whitespace line), if 'rstrip_ws' is true but 'skip_blanks' is
+    not."""
+
+    default_options = {
+        'strip_comments': 1,
+        'skip_blanks': 1,
+        'lstrip_ws': 0,
+        'rstrip_ws': 1,
+        'join_lines': 0,
+        'collapse_join': 0,
+        'errors': 'strict',
+    }
+
+    def __init__(self, filename=None, file=None, **options):
+        """Construct a new TextFile object.  At least one of 'filename'
+        (a string) and 'file' (a file-like object) must be supplied.
+        They keyword argument options are described above and affect
+        the values returned by 'readline()'."""
+        if filename is None and file is None:
+            raise RuntimeError(
+                "you must supply either or both of 'filename' and 'file'"
+            )
+
+        # set values for all options -- either from client option hash
+        # or fallback to default_options
+        for opt in self.default_options.keys():
+            if opt in options:
+                setattr(self, opt, options[opt])
+            else:
+                setattr(self, opt, self.default_options[opt])
+
+        # sanity check client option hash
+        for opt in options.keys():
+            if opt not in self.default_options:
+                raise KeyError(f"invalid TextFile option '{opt}'")
+
+        if file is None:
+            self.open(filename)
+        else:
+            self.filename = filename
+            self.file = file
+            self.current_line = 0  # assuming that file is at BOF!
+
+        # 'linebuf' is a stack of lines that will be emptied before we
+        # actually read from the file; it's only populated by an
+        # 'unreadline()' operation
+        self.linebuf = []
+
+    def open(self, filename):
+        """Open a new file named 'filename'.  This overrides both the
+        'filename' and 'file' arguments to the constructor."""
+        self.filename = filename
+        self.file = open(self.filename, errors=self.errors, encoding='utf-8')
+        self.current_line = 0
+
+    def close(self):
+        """Close the current file and forget everything we know about it
+        (filename, current line number)."""
+        file = self.file
+        self.file = None
+        self.filename = None
+        self.current_line = None
+        file.close()
+
+    def gen_error(self, msg, line=None):
+        outmsg = []
+        if line is None:
+            line = self.current_line
+        outmsg.append(self.filename + ", ")
+        if isinstance(line, (list, tuple)):
+            outmsg.append("lines {}-{}: ".format(*line))
+        else:
+            outmsg.append(f"line {int(line)}: ")
+        outmsg.append(str(msg))
+        return "".join(outmsg)
+
+    def error(self, msg, line=None):
+        raise ValueError("error: " + self.gen_error(msg, line))
+
+    def warn(self, msg, line=None):
+        """Print (to stderr) a warning message tied to the current logical
+        line in the current file.  If the current logical line in the
+        file spans multiple physical lines, the warning refers to the
+        whole range, eg. "lines 3-5".  If 'line' supplied, it overrides
+        the current line number; it may be a list or tuple to indicate a
+        range of physical lines, or an integer for a single physical
+        line."""
+        sys.stderr.write("warning: " + self.gen_error(msg, line) + "\n")
+
+    def readline(self):  # noqa: C901
+        """Read and return a single logical line from the current file (or
+        from an internal buffer if lines have previously been "unread"
+        with 'unreadline()').  If the 'join_lines' option is true, this
+        may involve reading multiple physical lines concatenated into a
+        single string.  Updates the current line number, so calling
+        'warn()' after 'readline()' emits a warning about the physical
+        line(s) just read.  Returns None on end-of-file, since the empty
+        string can occur if 'rstrip_ws' is true but 'strip_blanks' is
+        not."""
+        # If any "unread" lines waiting in 'linebuf', return the top
+        # one.  (We don't actually buffer read-ahead data -- lines only
+        # get put in 'linebuf' if the client explicitly does an
+        # 'unreadline()'.
+        if self.linebuf:
+            line = self.linebuf[-1]
+            del self.linebuf[-1]
+            return line
+
+        buildup_line = ''
+
+        while True:
+            # read the line, make it None if EOF
+            line = self.file.readline()
+            if line == '':
+                line = None
+
+            if self.strip_comments and line:
+                # Look for the first "#" in the line.  If none, never
+                # mind.  If we find one and it's the first character, or
+                # is not preceded by "\", then it starts a comment --
+                # strip the comment, strip whitespace before it, and
+                # carry on.  Otherwise, it's just an escaped "#", so
+                # unescape it (and any other escaped "#"'s that might be
+                # lurking in there) and otherwise leave the line alone.
+
+                pos = line.find("#")
+                if pos == -1:  # no "#" -- no comments
+                    pass
+
+                # It's definitely a comment -- either "#" is the first
+                # character, or it's elsewhere and unescaped.
+                elif pos == 0 or line[pos - 1] != "\\":
+                    # Have to preserve the trailing newline, because it's
+                    # the job of a later step (rstrip_ws) to remove it --
+                    # and if rstrip_ws is false, we'd better preserve it!
+                    # (NB. this means that if the final line is all comment
+                    # and has no trailing newline, we will think that it's
+                    # EOF; I think that's OK.)
+                    eol = (line[-1] == '\n') and '\n' or ''
+                    line = line[0:pos] + eol
+
+                    # If all that's left is whitespace, then skip line
+                    # *now*, before we try to join it to 'buildup_line' --
+                    # that way constructs like
+                    #   hello \\
+                    #   # comment that should be ignored
+                    #   there
+                    # result in "hello there".
+                    if line.strip() == "":
+                        continue
+                else:  # it's an escaped "#"
+                    line = line.replace("\\#", "#")
+
+            # did previous line end with a backslash? then accumulate
+            if self.join_lines and buildup_line:
+                # oops: end of file
+                if line is None:
+                    self.warn("continuation line immediately precedes end-of-file")
+                    return buildup_line
+
+                if self.collapse_join:
+                    line = line.lstrip()
+                line = buildup_line + line
+
+                # careful: pay attention to line number when incrementing it
+                if isinstance(self.current_line, list):
+                    self.current_line[1] = self.current_line[1] + 1
+                else:
+                    self.current_line = [self.current_line, self.current_line + 1]
+            # just an ordinary line, read it as usual
+            else:
+                if line is None:  # eof
+                    return None
+
+                # still have to be careful about incrementing the line number!
+                if isinstance(self.current_line, list):
+                    self.current_line = self.current_line[1] + 1
+                else:
+                    self.current_line = self.current_line + 1
+
+            # strip whitespace however the client wants (leading and
+            # trailing, or one or the other, or neither)
+            if self.lstrip_ws and self.rstrip_ws:
+                line = line.strip()
+            elif self.lstrip_ws:
+                line = line.lstrip()
+            elif self.rstrip_ws:
+                line = line.rstrip()
+
+            # blank line (whether we rstrip'ed or not)? skip to next line
+            # if appropriate
+            if line in ('', '\n') and self.skip_blanks:
+                continue
+
+            if self.join_lines:
+                if line[-1] == '\\':
+                    buildup_line = line[:-1]
+                    continue
+
+                if line[-2:] == '\\\n':
+                    buildup_line = line[0:-2] + '\n'
+                    continue
+
+            # well, I guess there's some actual content there: return it
+            return line
+
+    def readlines(self):
+        """Read and return the list of all logical lines remaining in the
+        current file."""
+        lines = []
+        while True:
+            line = self.readline()
+            if line is None:
+                return lines
+            lines.append(line)
+
+    def unreadline(self, line):
+        """Push 'line' (a string) onto an internal buffer that will be
+        checked by future 'readline()' calls.  Handy for implementing
+        a parser with line-at-a-time lookahead."""
+        self.linebuf.append(line)

python/Lib/site-packages/setuptools/_distutils/unixccompiler.py

@@ -0,0 +1,9 @@
+import importlib
+
+from .compilers.C import unix
+
+UnixCCompiler = unix.Compiler
+
+# ensure import of unixccompiler implies ccompiler imported
+# (pypa/setuptools#4871)
+importlib.import_module('distutils.ccompiler')

python/Lib/site-packages/setuptools/_distutils/util.py

@@ -0,0 +1,506 @@
+"""distutils.util
+
+Miscellaneous utility functions -- anything that doesn't fit into
+one of the other *util.py modules.
+"""
+
+from __future__ import annotations
+
+import functools
+import importlib.util
+import os
+import pathlib
+import re
+import string
+import subprocess
+import sys
+import sysconfig
+import tempfile
+from collections.abc import Callable, Iterable, Mapping
+from typing import TYPE_CHECKING, AnyStr
+
+from jaraco.functools import pass_none
+
+from ._log import log
+from ._modified import newer
+from .errors import DistutilsByteCompileError, DistutilsPlatformError
+from .spawn import spawn
+
+if TYPE_CHECKING:
+    from typing_extensions import TypeVarTuple, Unpack
+
+    _Ts = TypeVarTuple("_Ts")
+
+
+def get_host_platform() -> str:
+    """
+    Return a string that identifies the current platform. Use this
+    function to distinguish platform-specific build directories and
+    platform-specific built distributions.
+    """
+
+    # This function initially exposed platforms as defined in Python 3.9
+    # even with older Python versions when distutils was split out.
+    # Now it delegates to stdlib sysconfig.
+
+    return sysconfig.get_platform()
+
+
+def get_platform() -> str:
+    if os.name == 'nt':
+        TARGET_TO_PLAT = {
+            'x86': 'win32',
+            'x64': 'win-amd64',
+            'arm': 'win-arm32',
+            'arm64': 'win-arm64',
+        }
+        target = os.environ.get('VSCMD_ARG_TGT_ARCH')
+        return TARGET_TO_PLAT.get(target) or get_host_platform()
+    return get_host_platform()
+
+
+if sys.platform == 'darwin':
+    _syscfg_macosx_ver = None  # cache the version pulled from sysconfig
+MACOSX_VERSION_VAR = 'MACOSX_DEPLOYMENT_TARGET'
+
+
+def _clear_cached_macosx_ver():
+    """For testing only. Do not call."""
+    global _syscfg_macosx_ver
+    _syscfg_macosx_ver = None
+
+
+def get_macosx_target_ver_from_syscfg():
+    """Get the version of macOS latched in the Python interpreter configuration.
+    Returns the version as a string or None if can't obtain one. Cached."""
+    global _syscfg_macosx_ver
+    if _syscfg_macosx_ver is None:
+        from distutils import sysconfig
+
+        ver = sysconfig.get_config_var(MACOSX_VERSION_VAR) or ''
+        if ver:
+            _syscfg_macosx_ver = ver
+    return _syscfg_macosx_ver
+
+
+def get_macosx_target_ver():
+    """Return the version of macOS for which we are building.
+
+    The target version defaults to the version in sysconfig latched at time
+    the Python interpreter was built, unless overridden by an environment
+    variable. If neither source has a value, then None is returned"""
+
+    syscfg_ver = get_macosx_target_ver_from_syscfg()
+    env_ver = os.environ.get(MACOSX_VERSION_VAR)
+
+    if env_ver:
+        # Validate overridden version against sysconfig version, if have both.
+        # Ensure that the deployment target of the build process is not less
+        # than 10.3 if the interpreter was built for 10.3 or later.  This
+        # ensures extension modules are built with correct compatibility
+        # values, specifically LDSHARED which can use
+        # '-undefined dynamic_lookup' which only works on >= 10.3.
+        if (
+            syscfg_ver
+            and split_version(syscfg_ver) >= [10, 3]
+            and split_version(env_ver) < [10, 3]
+        ):
+            my_msg = (
+                '$' + MACOSX_VERSION_VAR + ' mismatch: '
+                f'now "{env_ver}" but "{syscfg_ver}" during configure; '
+                'must use 10.3 or later'
+            )
+            raise DistutilsPlatformError(my_msg)
+        return env_ver
+    return syscfg_ver
+
+
+def split_version(s: str) -> list[int]:
+    """Convert a dot-separated string into a list of numbers for comparisons"""
+    return [int(n) for n in s.split('.')]
+
+
+@pass_none
+def convert_path(pathname: str | os.PathLike[str]) -> str:
+    r"""
+    Allow for pathlib.Path inputs, coax to a native path string.
+
+    If None is passed, will just pass it through as
+    Setuptools relies on this behavior.
+
+    >>> convert_path(None) is None
+    True
+
+    Removes empty paths.
+
+    >>> convert_path('foo/./bar').replace('\\', '/')
+    'foo/bar'
+    """
+    return os.fspath(pathlib.PurePath(pathname))
+
+
+def change_root(
+    new_root: AnyStr | os.PathLike[AnyStr], pathname: AnyStr | os.PathLike[AnyStr]
+) -> AnyStr:
+    """Return 'pathname' with 'new_root' prepended.  If 'pathname' is
+    relative, this is equivalent to "os.path.join(new_root,pathname)".
+    Otherwise, it requires making 'pathname' relative and then joining the
+    two, which is tricky on DOS/Windows and Mac OS.
+    """
+    if os.name == 'posix':
+        if not os.path.isabs(pathname):
+            return os.path.join(new_root, pathname)
+        else:
+            return os.path.join(new_root, pathname[1:])
+
+    elif os.name == 'nt':
+        (drive, path) = os.path.splitdrive(pathname)
+        if path[0] == os.sep:
+            path = path[1:]
+        return os.path.join(new_root, path)
+
+    raise DistutilsPlatformError(f"nothing known about platform '{os.name}'")
+
+
+@functools.lru_cache
+def check_environ() -> None:
+    """Ensure that 'os.environ' has all the environment variables we
+    guarantee that users can use in config files, command-line options,
+    etc.  Currently this includes:
+      HOME - user's home directory (Unix only)
+      PLAT - description of the current platform, including hardware
+             and OS (see 'get_platform()')
+    """
+    if os.name == 'posix' and 'HOME' not in os.environ:
+        try:
+            import pwd
+
+            os.environ['HOME'] = pwd.getpwuid(os.getuid())[5]
+        except (ImportError, KeyError):
+            # bpo-10496: if the current user identifier doesn't exist in the
+            # password database, do nothing
+            pass
+
+    if 'PLAT' not in os.environ:
+        os.environ['PLAT'] = get_platform()
+
+
+def subst_vars(s, local_vars: Mapping[str, object]) -> str:
+    """
+    Perform variable substitution on 'string'.
+    Variables are indicated by format-style braces ("{var}").
+    Variable is substituted by the value found in the 'local_vars'
+    dictionary or in 'os.environ' if it's not in 'local_vars'.
+    'os.environ' is first checked/augmented to guarantee that it contains
+    certain values: see 'check_environ()'.  Raise ValueError for any
+    variables not found in either 'local_vars' or 'os.environ'.
+    """
+    check_environ()
+    lookup = dict(os.environ)
+    lookup.update((name, str(value)) for name, value in local_vars.items())
+    try:
+        return _subst_compat(s).format_map(lookup)
+    except KeyError as var:
+        raise ValueError(f"invalid variable {var}")
+
+
+def _subst_compat(s):
+    """
+    Replace shell/Perl-style variable substitution with
+    format-style. For compatibility.
+    """
+
+    def _subst(match):
+        return f'{{{match.group(1)}}}'
+
+    repl = re.sub(r'\$([a-zA-Z_][a-zA-Z_0-9]*)', _subst, s)
+    if repl != s:
+        import warnings
+
+        warnings.warn(
+            "shell/Perl-style substitutions are deprecated",
+            DeprecationWarning,
+        )
+    return repl
+
+
+def grok_environment_error(exc: object, prefix: str = "error: ") -> str:
+    # Function kept for backward compatibility.
+    # Used to try clever things with EnvironmentErrors,
+    # but nowadays str(exception) produces good messages.
+    return prefix + str(exc)
+
+
+# Needed by 'split_quoted()'
+_wordchars_re = _squote_re = _dquote_re = None
+
+
+def _init_regex():
+    global _wordchars_re, _squote_re, _dquote_re
+    _wordchars_re = re.compile(rf'[^\\\'\"{string.whitespace} ]*')
+    _squote_re = re.compile(r"'(?:[^'\\]|\\.)*'")
+    _dquote_re = re.compile(r'"(?:[^"\\]|\\.)*"')
+
+
+def split_quoted(s: str) -> list[str]:
+    """Split a string up according to Unix shell-like rules for quotes and
+    backslashes.  In short: words are delimited by spaces, as long as those
+    spaces are not escaped by a backslash, or inside a quoted string.
+    Single and double quotes are equivalent, and the quote characters can
+    be backslash-escaped.  The backslash is stripped from any two-character
+    escape sequence, leaving only the escaped character.  The quote
+    characters are stripped from any quoted string.  Returns a list of
+    words.
+    """
+
+    # This is a nice algorithm for splitting up a single string, since it
+    # doesn't require character-by-character examination.  It was a little
+    # bit of a brain-bender to get it working right, though...
+    if _wordchars_re is None:
+        _init_regex()
+
+    s = s.strip()
+    words = []
+    pos = 0
+
+    while s:
+        m = _wordchars_re.match(s, pos)
+        end = m.end()
+        if end == len(s):
+            words.append(s[:end])
+            break
+
+        if s[end] in string.whitespace:
+            # unescaped, unquoted whitespace: now
+            # we definitely have a word delimiter
+            words.append(s[:end])
+            s = s[end:].lstrip()
+            pos = 0
+
+        elif s[end] == '\\':
+            # preserve whatever is being escaped;
+            # will become part of the current word
+            s = s[:end] + s[end + 1 :]
+            pos = end + 1
+
+        else:
+            if s[end] == "'":  # slurp singly-quoted string
+                m = _squote_re.match(s, end)
+            elif s[end] == '"':  # slurp doubly-quoted string
+                m = _dquote_re.match(s, end)
+            else:
+                raise RuntimeError(f"this can't happen (bad char '{s[end]}')")
+
+            if m is None:
+                raise ValueError(f"bad string (mismatched {s[end]} quotes?)")
+
+            (beg, end) = m.span()
+            s = s[:beg] + s[beg + 1 : end - 1] + s[end:]
+            pos = m.end() - 2
+
+        if pos >= len(s):
+            words.append(s)
+            break
+
+    return words
+
+
+# split_quoted ()
+
+
+def execute(
+    func: Callable[[Unpack[_Ts]], object],
+    args: tuple[Unpack[_Ts]],
+    msg: object = None,
+    verbose: bool = False,
+) -> None:
+    """
+    Perform some action that affects the outside world (e.g. by
+    writing to the filesystem). Was previously used to deal with
+    "dry run" operations, but now runs unconditionally.
+    """
+    if msg is None:
+        msg = f"{func.__name__}{args!r}"
+        if msg[-2:] == ',)':  # correct for singleton tuple
+            msg = msg[0:-2] + ')'
+
+    log.info(msg)
+    func(*args)
+
+
+def strtobool(val: str) -> bool:
+    """Convert a string representation of truth to true (1) or false (0).
+
+    True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
+    are 'n', 'no', 'f', 'false', 'off', and '0'.  Raises ValueError if
+    'val' is anything else.
+    """
+    val = val.lower()
+    if val in ('y', 'yes', 't', 'true', 'on', '1'):
+        return True
+    elif val in ('n', 'no', 'f', 'false', 'off', '0'):
+        return False
+    else:
+        raise ValueError(f"invalid truth value {val!r}")
+
+
+def byte_compile(  # noqa: C901
+    py_files: Iterable[str],
+    optimize: int = 0,
+    force: bool = False,
+    prefix: str | None = None,
+    base_dir: str | None = None,
+    verbose: bool = True,
+    direct: bool | None = None,
+) -> None:
+    """Byte-compile a collection of Python source files to .pyc
+    files in a __pycache__ subdirectory.  'py_files' is a list
+    of files to compile; any files that don't end in ".py" are silently
+    skipped.  'optimize' must be one of the following:
+      0 - don't optimize
+      1 - normal optimization (like "python -O")
+      2 - extra optimization (like "python -OO")
+    If 'force' is true, all files are recompiled regardless of
+    timestamps.
+
+    The source filename encoded in each bytecode file defaults to the
+    filenames listed in 'py_files'; you can modify these with 'prefix' and
+    'basedir'.  'prefix' is a string that will be stripped off of each
+    source filename, and 'base_dir' is a directory name that will be
+    prepended (after 'prefix' is stripped).  You can supply either or both
+    (or neither) of 'prefix' and 'base_dir', as you wish.
+
+    Byte-compilation is either done directly in this interpreter process
+    with the standard py_compile module, or indirectly by writing a
+    temporary script and executing it.  Normally, you should let
+    'byte_compile()' figure out to use direct compilation or not (see
+    the source for details).  The 'direct' flag is used by the script
+    generated in indirect mode; unless you know what you're doing, leave
+    it set to None.
+    """
+
+    # nothing is done if sys.dont_write_bytecode is True
+    if sys.dont_write_bytecode:
+        raise DistutilsByteCompileError('byte-compiling is disabled.')
+
+    # First, if the caller didn't force us into direct or indirect mode,
+    # figure out which mode we should be in.  We take a conservative
+    # approach: choose direct mode *only* if the current interpreter is
+    # in debug mode and optimize is 0.  If we're not in debug mode (-O
+    # or -OO), we don't know which level of optimization this
+    # interpreter is running with, so we can't do direct
+    # byte-compilation and be certain that it's the right thing.  Thus,
+    # always compile indirectly if the current interpreter is in either
+    # optimize mode, or if either optimization level was requested by
+    # the caller.
+    if direct is None:
+        direct = __debug__ and optimize == 0
+
+    # "Indirect" byte-compilation: write a temporary script and then
+    # run it with the appropriate flags.
+    if not direct:
+        (script_fd, script_name) = tempfile.mkstemp(".py")
+        log.info("writing byte-compilation script '%s'", script_name)
+        script = os.fdopen(script_fd, "w", encoding='utf-8')
+
+        with script:
+            script.write(
+                """\
+from distutils.util import byte_compile
+files = [
+"""
+            )
+
+            # XXX would be nice to write absolute filenames, just for
+            # safety's sake (script should be more robust in the face of
+            # chdir'ing before running it).  But this requires abspath'ing
+            # 'prefix' as well, and that breaks the hack in build_lib's
+            # 'byte_compile()' method that carefully tacks on a trailing
+            # slash (os.sep really) to make sure the prefix here is "just
+            # right".  This whole prefix business is rather delicate -- the
+            # problem is that it's really a directory, but I'm treating it
+            # as a dumb string, so trailing slashes and so forth matter.
+
+            script.write(",\n".join(map(repr, py_files)) + "]\n")
+            script.write(
+                f"""
+byte_compile(files, optimize={optimize!r}, force={force!r},
+         prefix={prefix!r}, base_dir={base_dir!r},
+         verbose={verbose!r},
+         direct=True)
+"""
+            )
+
+        cmd = [sys.executable]
+        cmd.extend(subprocess._optim_args_from_interpreter_flags())
+        cmd.append(script_name)
+        spawn(cmd)
+        execute(os.remove, (script_name,), f"removing {script_name}")
+
+    # "Direct" byte-compilation: use the py_compile module to compile
+    # right here, right now.  Note that the script generated in indirect
+    # mode simply calls 'byte_compile()' in direct mode, a weird sort of
+    # cross-process recursion.  Hey, it works!
+    else:
+        from py_compile import compile
+
+        for file in py_files:
+            if file[-3:] != ".py":
+                # This lets us be lazy and not filter filenames in
+                # the "install_lib" command.
+                continue
+
+            # Terminology from the py_compile module:
+            #   cfile - byte-compiled file
+            #   dfile - purported source filename (same as 'file' by default)
+            if optimize >= 0:
+                opt = '' if optimize == 0 else optimize
+                cfile = importlib.util.cache_from_source(file, optimization=opt)
+            else:
+                cfile = importlib.util.cache_from_source(file)
+            dfile = file
+            if prefix:
+                if file[: len(prefix)] != prefix:
+                    raise ValueError(
+                        f"invalid prefix: filename {file!r} doesn't start with {prefix!r}"
+                    )
+                dfile = dfile[len(prefix) :]
+            if base_dir:
+                dfile = os.path.join(base_dir, dfile)
+
+            cfile_base = os.path.basename(cfile)
+            if direct:
+                if force or newer(file, cfile):
+                    log.info("byte-compiling %s to %s", file, cfile_base)
+                    compile(file, cfile, dfile)
+                else:
+                    log.debug("skipping byte-compilation of %s to %s", file, cfile_base)
+
+
+def rfc822_escape(header: str) -> str:
+    """Return a version of the string escaped for inclusion in an
+    RFC-822 header, by ensuring there are 8 spaces space after each newline.
+    """
+    indent = 8 * " "
+    lines = header.splitlines(keepends=True)
+
+    # Emulate the behaviour of `str.split`
+    # (the terminal line break in `splitlines` does not result in an extra line):
+    ends_in_newline = lines and lines[-1].splitlines()[0] != lines[-1]
+    suffix = indent if ends_in_newline else ""
+
+    return indent.join(lines) + suffix
+
+
+def is_mingw() -> bool:
+    """Returns True if the current platform is mingw.
+
+    Python compiled with Mingw-w64 has sys.platform == 'win32' and
+    get_platform() starts with 'mingw'.
+    """
+    return sys.platform == 'win32' and get_platform().startswith('mingw')
+
+
+def is_freethreaded():
+    """Return True if the Python interpreter is built with free threading support."""
+    return bool(sysconfig.get_config_var('Py_GIL_DISABLED'))

python/Lib/site-packages/setuptools/_distutils/version.py

@@ -0,0 +1,348 @@
+#
+# distutils/version.py
+#
+# Implements multiple version numbering conventions for the
+# Python Module Distribution Utilities.
+#
+# $Id$
+#
+
+"""Provides classes to represent module version numbers (one class for
+each style of version numbering).  There are currently two such classes
+implemented: StrictVersion and LooseVersion.
+
+Every version number class implements the following interface:
+  * the 'parse' method takes a string and parses it to some internal
+    representation; if the string is an invalid version number,
+    'parse' raises a ValueError exception
+  * the class constructor takes an optional string argument which,
+    if supplied, is passed to 'parse'
+  * __str__ reconstructs the string that was passed to 'parse' (or
+    an equivalent string -- ie. one that will generate an equivalent
+    version number instance)
+  * __repr__ generates Python code to recreate the version number instance
+  * _cmp compares the current instance with either another instance
+    of the same class or a string (which will be parsed to an instance
+    of the same class, thus must follow the same rules)
+"""
+
+import contextlib
+import re
+import warnings
+
+
+@contextlib.contextmanager
+def suppress_known_deprecation():
+    with warnings.catch_warnings(record=True) as ctx:
+        warnings.filterwarnings(
+            action='default',
+            category=DeprecationWarning,
+            message="distutils Version classes are deprecated.",
+        )
+        yield ctx
+
+
+class Version:
+    """Abstract base class for version numbering classes.  Just provides
+    constructor (__init__) and reproducer (__repr__), because those
+    seem to be the same for all version numbering classes; and route
+    rich comparisons to _cmp.
+    """
+
+    def __init__(self, vstring=None):
+        if vstring:
+            self.parse(vstring)
+        warnings.warn(
+            "distutils Version classes are deprecated. Use packaging.version instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
+    def __repr__(self):
+        return f"{self.__class__.__name__} ('{self}')"
+
+    def __eq__(self, other):
+        c = self._cmp(other)
+        if c is NotImplemented:
+            return c
+        return c == 0
+
+    def __lt__(self, other):
+        c = self._cmp(other)
+        if c is NotImplemented:
+            return c
+        return c < 0
+
+    def __le__(self, other):
+        c = self._cmp(other)
+        if c is NotImplemented:
+            return c
+        return c <= 0
+
+    def __gt__(self, other):
+        c = self._cmp(other)
+        if c is NotImplemented:
+            return c
+        return c > 0
+
+    def __ge__(self, other):
+        c = self._cmp(other)
+        if c is NotImplemented:
+            return c
+        return c >= 0
+
+
+# Interface for version-number classes -- must be implemented
+# by the following classes (the concrete ones -- Version should
+# be treated as an abstract class).
+#    __init__ (string) - create and take same action as 'parse'
+#                        (string parameter is optional)
+#    parse (string)    - convert a string representation to whatever
+#                        internal representation is appropriate for
+#                        this style of version numbering
+#    __str__ (self)    - convert back to a string; should be very similar
+#                        (if not identical to) the string supplied to parse
+#    __repr__ (self)   - generate Python code to recreate
+#                        the instance
+#    _cmp (self, other) - compare two version numbers ('other' may
+#                        be an unparsed version string, or another
+#                        instance of your version class)
+
+
+class StrictVersion(Version):
+    """Version numbering for anal retentives and software idealists.
+    Implements the standard interface for version number classes as
+    described above.  A version number consists of two or three
+    dot-separated numeric components, with an optional "pre-release" tag
+    on the end.  The pre-release tag consists of the letter 'a' or 'b'
+    followed by a number.  If the numeric components of two version
+    numbers are equal, then one with a pre-release tag will always
+    be deemed earlier (lesser) than one without.
+
+    The following are valid version numbers (shown in the order that
+    would be obtained by sorting according to the supplied cmp function):
+
+        0.4       0.4.0  (these two are equivalent)
+        0.4.1
+        0.5a1
+        0.5b3
+        0.5
+        0.9.6
+        1.0
+        1.0.4a3
+        1.0.4b1
+        1.0.4
+
+    The following are examples of invalid version numbers:
+
+        1
+        2.7.2.2
+        1.3.a4
+        1.3pl1
+        1.3c4
+
+    The rationale for this version numbering system will be explained
+    in the distutils documentation.
+    """
+
+    version_re = re.compile(
+        r'^(\d+) \. (\d+) (\. (\d+))? ([ab](\d+))?$', re.VERBOSE | re.ASCII
+    )
+
+    def parse(self, vstring):
+        match = self.version_re.match(vstring)
+        if not match:
+            raise ValueError(f"invalid version number '{vstring}'")
+
+        (major, minor, patch, prerelease, prerelease_num) = match.group(1, 2, 4, 5, 6)
+
+        if patch:
+            self.version = tuple(map(int, [major, minor, patch]))
+        else:
+            self.version = tuple(map(int, [major, minor])) + (0,)
+
+        if prerelease:
+            self.prerelease = (prerelease[0], int(prerelease_num))
+        else:
+            self.prerelease = None
+
+    def __str__(self):
+        if self.version[2] == 0:
+            vstring = '.'.join(map(str, self.version[0:2]))
+        else:
+            vstring = '.'.join(map(str, self.version))
+
+        if self.prerelease:
+            vstring = vstring + self.prerelease[0] + str(self.prerelease[1])
+
+        return vstring
+
+    def _cmp(self, other):
+        if isinstance(other, str):
+            with suppress_known_deprecation():
+                other = StrictVersion(other)
+        elif not isinstance(other, StrictVersion):
+            return NotImplemented
+
+        if self.version == other.version:
+            # versions match; pre-release drives the comparison
+            return self._cmp_prerelease(other)
+
+        return -1 if self.version < other.version else 1
+
+    def _cmp_prerelease(self, other):
+        """
+        case 1: self has prerelease, other doesn't; other is greater
+        case 2: self doesn't have prerelease, other does: self is greater
+        case 3: both or neither have prerelease: compare them!
+        """
+        if self.prerelease and not other.prerelease:
+            return -1
+        elif not self.prerelease and other.prerelease:
+            return 1
+
+        if self.prerelease == other.prerelease:
+            return 0
+        elif self.prerelease < other.prerelease:
+            return -1
+        else:
+            return 1
+
+
+# end class StrictVersion
+
+
+# The rules according to Greg Stein:
+# 1) a version number has 1 or more numbers separated by a period or by
+#    sequences of letters. If only periods, then these are compared
+#    left-to-right to determine an ordering.
+# 2) sequences of letters are part of the tuple for comparison and are
+#    compared lexicographically
+# 3) recognize the numeric components may have leading zeroes
+#
+# The LooseVersion class below implements these rules: a version number
+# string is split up into a tuple of integer and string components, and
+# comparison is a simple tuple comparison.  This means that version
+# numbers behave in a predictable and obvious way, but a way that might
+# not necessarily be how people *want* version numbers to behave.  There
+# wouldn't be a problem if people could stick to purely numeric version
+# numbers: just split on period and compare the numbers as tuples.
+# However, people insist on putting letters into their version numbers;
+# the most common purpose seems to be:
+#   - indicating a "pre-release" version
+#     ('alpha', 'beta', 'a', 'b', 'pre', 'p')
+#   - indicating a post-release patch ('p', 'pl', 'patch')
+# but of course this can't cover all version number schemes, and there's
+# no way to know what a programmer means without asking him.
+#
+# The problem is what to do with letters (and other non-numeric
+# characters) in a version number.  The current implementation does the
+# obvious and predictable thing: keep them as strings and compare
+# lexically within a tuple comparison.  This has the desired effect if
+# an appended letter sequence implies something "post-release":
+# eg. "0.99" < "0.99pl14" < "1.0", and "5.001" < "5.001m" < "5.002".
+#
+# However, if letters in a version number imply a pre-release version,
+# the "obvious" thing isn't correct.  Eg. you would expect that
+# "1.5.1" < "1.5.2a2" < "1.5.2", but under the tuple/lexical comparison
+# implemented here, this just isn't so.
+#
+# Two possible solutions come to mind.  The first is to tie the
+# comparison algorithm to a particular set of semantic rules, as has
+# been done in the StrictVersion class above.  This works great as long
+# as everyone can go along with bondage and discipline.  Hopefully a
+# (large) subset of Python module programmers will agree that the
+# particular flavour of bondage and discipline provided by StrictVersion
+# provides enough benefit to be worth using, and will submit their
+# version numbering scheme to its domination.  The free-thinking
+# anarchists in the lot will never give in, though, and something needs
+# to be done to accommodate them.
+#
+# Perhaps a "moderately strict" version class could be implemented that
+# lets almost anything slide (syntactically), and makes some heuristic
+# assumptions about non-digits in version number strings.  This could
+# sink into special-case-hell, though; if I was as talented and
+# idiosyncratic as Larry Wall, I'd go ahead and implement a class that
+# somehow knows that "1.2.1" < "1.2.2a2" < "1.2.2" < "1.2.2pl3", and is
+# just as happy dealing with things like "2g6" and "1.13++".  I don't
+# think I'm smart enough to do it right though.
+#
+# In any case, I've coded the test suite for this module (see
+# ../test/test_version.py) specifically to fail on things like comparing
+# "1.2a2" and "1.2".  That's not because the *code* is doing anything
+# wrong, it's because the simple, obvious design doesn't match my
+# complicated, hairy expectations for real-world version numbers.  It
+# would be a snap to fix the test suite to say, "Yep, LooseVersion does
+# the Right Thing" (ie. the code matches the conception).  But I'd rather
+# have a conception that matches common notions about version numbers.
+
+
+class LooseVersion(Version):
+    """Version numbering for anarchists and software realists.
+    Implements the standard interface for version number classes as
+    described above.  A version number consists of a series of numbers,
+    separated by either periods or strings of letters.  When comparing
+    version numbers, the numeric components will be compared
+    numerically, and the alphabetic components lexically.  The following
+    are all valid version numbers, in no particular order:
+
+        1.5.1
+        1.5.2b2
+        161
+        3.10a
+        8.02
+        3.4j
+        1996.07.12
+        3.2.pl0
+        3.1.1.6
+        2g6
+        11g
+        0.960923
+        2.2beta29
+        1.13++
+        5.5.kw
+        2.0b1pl0
+
+    In fact, there is no such thing as an invalid version number under
+    this scheme; the rules for comparison are simple and predictable,
+    but may not always give the results you want (for some definition
+    of "want").
+    """
+
+    component_re = re.compile(r'(\d+ | [a-z]+ | \.)', re.VERBOSE)
+
+    def parse(self, vstring):
+        # I've given up on thinking I can reconstruct the version string
+        # from the parsed tuple -- so I just store the string here for
+        # use by __str__
+        self.vstring = vstring
+        components = [x for x in self.component_re.split(vstring) if x and x != '.']
+        for i, obj in enumerate(components):
+            try:
+                components[i] = int(obj)
+            except ValueError:
+                pass
+
+        self.version = components
+
+    def __str__(self):
+        return self.vstring
+
+    def __repr__(self):
+        return f"LooseVersion ('{self}')"
+
+    def _cmp(self, other):
+        if isinstance(other, str):
+            other = LooseVersion(other)
+        elif not isinstance(other, LooseVersion):
+            return NotImplemented
+
+        if self.version == other.version:
+            return 0
+        if self.version < other.version:
+            return -1
+        if self.version > other.version:
+            return 1
+
+
+# end class LooseVersion

python/Lib/site-packages/setuptools/_vendor/more_itertools-10.8.0.dist-info/INSTALLER

@@ -0,0 +1 @@
+uv

python/Lib/site-packages/setuptools/_vendor/more_itertools-10.8.0.dist-info/METADATA

@@ -0,0 +1,283 @@
+Metadata-Version: 2.4
+Name: more-itertools
+Version: 10.8.0
+Summary: More routines for operating on iterables, beyond itertools
+Keywords: itertools,iterator,iteration,filter,peek,peekable,chunk,chunked
+Author-email: Erik Rose <erikrose@grinchcentral.com>
+Requires-Python: >=3.9
+Description-Content-Type: text/x-rst
+License-Expression: MIT
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: Natural Language :: English
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: 3.11
+Classifier: Programming Language :: Python :: 3.12
+Classifier: Programming Language :: Python :: 3.13
+Classifier: Programming Language :: Python :: 3 :: Only
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Software Development :: Libraries
+License-File: LICENSE
+Project-URL: Documentation, https://more-itertools.readthedocs.io/en/stable/
+Project-URL: Homepage, https://github.com/more-itertools/more-itertools
+
+==============
+More Itertools
+==============
+
+.. image:: https://readthedocs.org/projects/more-itertools/badge/?version=latest
+  :target: https://more-itertools.readthedocs.io/en/stable/
+
+Python's ``itertools`` library is a gem - you can compose elegant solutions
+for a variety of problems with the functions it provides. In ``more-itertools``
+we collect additional building blocks, recipes, and routines for working with
+Python iterables.
+
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Grouping               | `chunked <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.chunked>`_,                                                                               |
+|                        | `ichunked <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.ichunked>`_,                                                                             |
+|                        | `chunked_even <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.chunked_even>`_,                                                                     |
+|                        | `sliced <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.sliced>`_,                                                                                 |
+|                        | `constrained_batches <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.constrained_batches>`_,                                                       |
+|                        | `distribute <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.distribute>`_,                                                                         |
+|                        | `divide <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.divide>`_,                                                                                 |
+|                        | `split_at <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.split_at>`_,                                                                             |
+|                        | `split_before <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.split_before>`_,                                                                     |
+|                        | `split_after <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.split_after>`_,                                                                       |
+|                        | `split_into <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.split_into>`_,                                                                         |
+|                        | `split_when <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.split_when>`_,                                                                         |
+|                        | `bucket <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.bucket>`_,                                                                                 |
+|                        | `unzip <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.unzip>`_,                                                                                   |
+|                        | `batched <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.batched>`_,                                                                               |
+|                        | `grouper <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.grouper>`_,                                                                               |
+|                        | `partition <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.partition>`_,                                                                           |
+|                        | `transpose <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.transpose>`_                                                                            |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Lookahead and lookback | `spy <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.spy>`_,                                                                                       |
+|                        | `peekable <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.peekable>`_,                                                                             |
+|                        | `seekable <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.seekable>`_                                                                              |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Windowing              | `windowed <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.windowed>`_,                                                                             |
+|                        | `substrings <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.substrings>`_,                                                                         |
+|                        | `substrings_indexes <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.substrings_indexes>`_,                                                         |
+|                        | `stagger <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.stagger>`_,                                                                               |
+|                        | `windowed_complete <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.windowed_complete>`_,                                                           |
+|                        | `pairwise <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.pairwise>`_,                                                                             |
+|                        | `triplewise <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.triplewise>`_,                                                                         |
+|                        | `sliding_window <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.sliding_window>`_,                                                                 |
+|                        | `subslices <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.subslices>`_                                                                            |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Augmenting             | `count_cycle <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.count_cycle>`_,                                                                       |
+|                        | `intersperse <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.intersperse>`_,                                                                       |
+|                        | `padded <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.padded>`_,                                                                                 |
+|                        | `repeat_each <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.repeat_each>`_,                                                                       |
+|                        | `mark_ends <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.mark_ends>`_,                                                                           |
+|                        | `repeat_last <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.repeat_last>`_,                                                                       |
+|                        | `adjacent <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.adjacent>`_,                                                                             |
+|                        | `groupby_transform <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.groupby_transform>`_,                                                           |
+|                        | `pad_none <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.pad_none>`_,                                                                             |
+|                        | `ncycles <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.ncycles>`_                                                                                |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Combining              | `collapse <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.collapse>`_,                                                                             |
+|                        | `sort_together <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.sort_together>`_,                                                                   |
+|                        | `interleave <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.interleave>`_,                                                                         |
+|                        | `interleave_longest <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.interleave_longest>`_,                                                         |
+|                        | `interleave_evenly <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.interleave_evenly>`_,                                                           |
+|                        | `interleave_randomly <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.interleave_randomly>`_,                                                       |
+|                        | `zip_offset <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.zip_offset>`_,                                                                         |
+|                        | `zip_equal <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.zip_equal>`_,                                                                           |
+|                        | `zip_broadcast <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.zip_broadcast>`_,                                                                   |
+|                        | `flatten <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.flatten>`_,                                                                               |
+|                        | `roundrobin <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.roundrobin>`_,                                                                         |
+|                        | `prepend <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.prepend>`_,                                                                               |
+|                        | `value_chain <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.value_chain>`_,                                                                       |
+|                        | `partial_product <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.partial_product>`_                                                                |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Summarizing            | `ilen <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.ilen>`_,                                                                                     |
+|                        | `unique_to_each <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.unique_to_each>`_,                                                                 |
+|                        | `sample <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.sample>`_,                                                                                 |
+|                        | `consecutive_groups <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.consecutive_groups>`_,                                                         |
+|                        | `run_length <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.run_length>`_,                                                                         |
+|                        | `map_reduce <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.map_reduce>`_,                                                                         |
+|                        | `join_mappings <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.join_mappings>`_,                                                                   |
+|                        | `exactly_n <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.exactly_n>`_,                                                                           |
+|                        | `is_sorted <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.is_sorted>`_,                                                                           |
+|                        | `all_equal <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.all_equal>`_,                                                                           |
+|                        | `all_unique <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.all_unique>`_,                                                                         |
+|                        | `argmin <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.argmin>`_,                                                                                 |
+|                        | `argmax <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.argmax>`_,                                                                                 |
+|                        | `minmax <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.minmax>`_,                                                                                 |
+|                        | `first_true <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.first_true>`_,                                                                         |
+|                        | `quantify <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.quantify>`_,                                                                             |
+|                        | `iequals <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.iequals>`_                                                                                |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Selecting              | `islice_extended <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.islice_extended>`_,                                                               |
+|                        | `first <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.first>`_,                                                                                   |
+|                        | `last <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.last>`_,                                                                                     |
+|                        | `one <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.one>`_,                                                                                       |
+|                        | `only <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.only>`_,                                                                                     |
+|                        | `strictly_n <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.strictly_n>`_,                                                                         |
+|                        | `strip <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.strip>`_,                                                                                   |
+|                        | `lstrip <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.lstrip>`_,                                                                                 |
+|                        | `rstrip <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.rstrip>`_,                                                                                 |
+|                        | `filter_except <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.filter_except>`_,                                                                   |
+|                        | `map_except <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.map_except>`_,                                                                         |
+|                        | `filter_map <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.filter_map>`_,                                                                         |
+|                        | `iter_suppress <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.iter_suppress>`_,                                                                   |
+|                        | `nth_or_last <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.nth_or_last>`_,                                                                       |
+|                        | `extract <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.extract>`_,                                                                               |
+|                        | `unique_in_window <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.unique_in_window>`_,                                                             |
+|                        | `before_and_after <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.before_and_after>`_,                                                             |
+|                        | `nth <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.nth>`_,                                                                                       |
+|                        | `take <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.take>`_,                                                                                     |
+|                        | `tail <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.tail>`_,                                                                                     |
+|                        | `unique_everseen <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.unique_everseen>`_,                                                               |
+|                        | `unique_justseen <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.unique_justseen>`_,                                                               |
+|                        | `unique <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.unique>`_,                                                                                 |
+|                        | `duplicates_everseen <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.duplicates_everseen>`_,                                                       |
+|                        | `duplicates_justseen <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.duplicates_justseen>`_,                                                       |
+|                        | `classify_unique <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.classify_unique>`_,                                                               |
+|                        | `longest_common_prefix <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.longest_common_prefix>`_,                                                   |
+|                        | `takewhile_inclusive <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.takewhile_inclusive>`_                                                        |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Math                   | `dft <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.dft>`_,                                                                                       |
+|                        | `idft <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.idft>`_,                                                                                     |
+|                        | `convolve <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.convolve>`_,                                                                             |
+|                        | `dotproduct <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.dotproduct>`_,                                                                         |
+|                        | `matmul <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.matmul>`_,                                                                                 |
+|                        | `polynomial_from_roots <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.polynomial_from_roots>`_,                                                   |
+|                        | `polynomial_derivative <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.polynomial_derivative>`_,                                                   |
+|                        | `polynomial_eval <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.polynomial_eval>`_,                                                               |
+|                        | `sum_of_squares <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.sum_of_squares>`_,                                                                 |
+|                        | `running_median <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.running_median>`_,                                                                 |
+|                        | `totient <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.totient>`_                                                                                |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Integer math           | `factor <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.factor>`_,                                                                                 |
+|                        | `is_prime <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.is_prime>`_,                                                                             |
+|                        | `multinomial <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.multinomial>`_,                                                                       |
+|                        | `nth_prime <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.nth_prime>`_,                                                                           |
+|                        | `sieve <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.sieve>`_                                                                                    |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Combinatorics          | `circular_shifts <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.circular_shifts>`_,                                                               |
+|                        | `derangements <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.derangements>`_,                                                                     |
+|                        | `gray_product  <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.gray_product>`_,                                                                    |
+|                        | `outer_product  <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.outer_product>`_,                                                                  |
+|                        | `partitions <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.partitions>`_,                                                                         |
+|                        | `set_partitions <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.set_partitions>`_,                                                                 |
+|                        | `powerset <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.powerset>`_,                                                                             |
+|                        | `powerset_of_sets <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.powerset_of_sets>`_                                                              |
+|                        +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+|                        | `distinct_combinations <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.distinct_combinations>`_,                                                   |
+|                        | `distinct_permutations <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.distinct_permutations>`_                                                    |
+|                        +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+|                        | `combination_index <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.combination_index>`_,                                                           |
+|                        | `combination_with_replacement_index <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.combination_with_replacement_index>`_,                         |
+|                        | `permutation_index <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.permutation_index>`_,                                                           |
+|                        | `product_index <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.product_index>`_                                                                    |
+|                        +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+|                        | `nth_combination <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.nth_combination>`_,                                                               |
+|                        | `nth_combination_with_replacement <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.nth_combination_with_replacement>`_,                             |
+|                        | `nth_permutation <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.nth_permutation>`_,                                                               |
+|                        | `nth_product <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.nth_product>`_                                                                        |
+|                        +-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+|                        | `random_combination <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.random_combination>`_,                                                         |
+|                        | `random_combination_with_replacement <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.random_combination_with_replacement>`_,                       |
+|                        | `random_permutation <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.random_permutation>`_,                                                         |
+|                        | `random_product <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.random_product>`_                                                                  |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Wrapping               | `always_iterable <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.always_iterable>`_,                                                               |
+|                        | `always_reversible <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.always_reversible>`_,                                                           |
+|                        | `countable <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.countable>`_,                                                                           |
+|                        | `consumer <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.consumer>`_,                                                                             |
+|                        | `with_iter <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.with_iter>`_,                                                                           |
+|                        | `iter_except <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.iter_except>`_                                                                        |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| Others                 | `locate <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.locate>`_,                                                                                 |
+|                        | `rlocate <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.rlocate>`_,                                                                               |
+|                        | `replace <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.replace>`_,                                                                               |
+|                        | `numeric_range <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.numeric_range>`_,                                                                   |
+|                        | `side_effect <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.side_effect>`_,                                                                       |
+|                        | `iterate <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.iterate>`_,                                                                               |
+|                        | `loops <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.loops>`_,                                                                                   |
+|                        | `difference <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.difference>`_,                                                                         |
+|                        | `make_decorator <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.make_decorator>`_,                                                                 |
+|                        | `SequenceView <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.SequenceView>`_,                                                                     |
+|                        | `time_limited <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.time_limited>`_,                                                                     |
+|                        | `map_if <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.map_if>`_,                                                                                 |
+|                        | `iter_index <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.iter_index>`_,                                                                         |
+|                        | `consume <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.consume>`_,                                                                               |
+|                        | `tabulate <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.tabulate>`_,                                                                             |
+|                        | `repeatfunc <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.repeatfunc>`_,                                                                         |
+|                        | `reshape <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.reshape>`_,                                                                               |
+|                        | `doublestarmap <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.doublestarmap>`_                                                                    |
++------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+
+
+Getting started
+===============
+
+To get started, install the library with `pip <https://pip.pypa.io/en/stable/>`_:
+
+.. code-block:: shell
+
+    pip install more-itertools
+
+The recipes from the `itertools docs <https://docs.python.org/3/library/itertools.html#itertools-recipes>`_
+are included in the top-level package:
+
+.. code-block:: python
+
+    >>> from more_itertools import flatten
+    >>> iterable = [(0, 1), (2, 3)]
+    >>> list(flatten(iterable))
+    [0, 1, 2, 3]
+
+Several new recipes are available as well:
+
+.. code-block:: python
+
+    >>> from more_itertools import chunked
+    >>> iterable = [0, 1, 2, 3, 4, 5, 6, 7, 8]
+    >>> list(chunked(iterable, 3))
+    [[0, 1, 2], [3, 4, 5], [6, 7, 8]]
+
+    >>> from more_itertools import spy
+    >>> iterable = (x * x for x in range(1, 6))
+    >>> head, iterable = spy(iterable, n=3)
+    >>> list(head)
+    [1, 4, 9]
+    >>> list(iterable)
+    [1, 4, 9, 16, 25]
+
+
+
+For the full listing of functions, see the `API documentation <https://more-itertools.readthedocs.io/en/stable/api.html>`_.
+
+
+Links elsewhere
+===============
+
+Blog posts about ``more-itertools``:
+
+* `Yo, I heard you like decorators <https://www.bbayles.com/index/decorator_factory>`__
+* `Tour of Python Itertools <https://martinheinz.dev/blog/16>`__ (`Alternate <https://dev.to/martinheinz/tour-of-python-itertools-4122>`__)
+* `Real-World Python More Itertools <https://python.plainenglish.io/real-world-more-itertools-gideons-blog-a3901c607550>`_
+
+
+Development
+===========
+
+``more-itertools`` is maintained by `@erikrose <https://github.com/erikrose>`_
+and `@bbayles <https://github.com/bbayles>`_, with help from `many others <https://github.com/more-itertools/more-itertools/graphs/contributors>`_.
+If you have a problem or suggestion, please file a bug or pull request in this
+repository. Thanks for contributing!
+
+
+Version History
+===============
+
+The version history can be found in `documentation <https://more-itertools.readthedocs.io/en/stable/versions.html>`_.
+

python/Lib/site-packages/setuptools/_vendor/more_itertools-10.8.0.dist-info/RECORD

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+more_itertools-10.8.0.dist-info/INSTALLER,sha256=5hhM4Q4mYTT9z6QB6PGpUAW81PGNFrYrdXMj4oM_6ak,2
+more_itertools-10.8.0.dist-info/METADATA,sha256=arNRUUWr5YsGfwh8hnYxz0z11lP-2BuWQu4SCGw5BLg,39413
+more_itertools-10.8.0.dist-info/RECORD,,
+more_itertools-10.8.0.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+more_itertools-10.8.0.dist-info/WHEEL,sha256=G2gURzTEtmeR8nrdXUJfNiB3VYVxigPQ-bEQujpNiNs,82
+more_itertools-10.8.0.dist-info/licenses/LICENSE,sha256=CfHIyelBrz5YTVlkHqm4fYPAyw_QB-te85Gn4mQ8GkY,1053
+more_itertools/__init__.py,sha256=5F7E_zpoGcEBW_T_3WE0WYYt8j-gJodIuiBcOJxrOv8,149
+more_itertools/__init__.pyi,sha256=5B3eTzON1BBuOLob1vCflyEb2lSd6usXQQ-Cv-hXkeA,43
+more_itertools/more.py,sha256=mNPKKu5UI7lRL460vgm0QTCWFiGMVCMosSPxVSdibos,163690
+more_itertools/more.pyi,sha256=fpEgNX3O66wY5cnT-s5VYDKNUpAcaCyU3iP84It3OOM,27119
+more_itertools/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+more_itertools/recipes.py,sha256=Ma-kuBNZDFhaQDbIJgRmnrG86WzaupbOyUV3v8je3xw,41811
+more_itertools/recipes.pyi,sha256=LNRwN-OL3nkMfQAqx-PPc1fBaetUObb_Z6mdePyzh1c,6226

python/Lib/site-packages/setuptools/_vendor/more_itertools-10.8.0.dist-info/WHEEL

@@ -0,0 +1,4 @@
+Wheel-Version: 1.0
+Generator: flit 3.12.0
+Root-Is-Purelib: true
+Tag: py3-none-any

python/Lib/site-packages/setuptools/_vendor/more_itertools/__init__.py

@@ -0,0 +1,6 @@
+"""More routines for operating on iterables, beyond itertools"""
+
+from .more import *  # noqa
+from .recipes import *  # noqa
+
+__version__ = '10.8.0'

python/Lib/site-packages/setuptools/_vendor/more_itertools/__init__.pyi

@@ -0,0 +1,2 @@
+from .more import *
+from .recipes import *

python/Lib/site-packages/setuptools/_vendor/more_itertools/recipes.py

@@ -0,0 +1,1471 @@
+"""Imported from the recipes section of the itertools documentation.
+
+All functions taken from the recipes section of the itertools library docs
+[1]_.
+Some backward-compatible usability improvements have been made.
+
+.. [1] http://docs.python.org/library/itertools.html#recipes
+
+"""
+
+import random
+
+from bisect import bisect_left, insort
+from collections import deque
+from contextlib import suppress
+from functools import lru_cache, partial, reduce
+from heapq import heappush, heappushpop
+from itertools import (
+    accumulate,
+    chain,
+    combinations,
+    compress,
+    count,
+    cycle,
+    groupby,
+    islice,
+    product,
+    repeat,
+    starmap,
+    takewhile,
+    tee,
+    zip_longest,
+)
+from math import prod, comb, isqrt, gcd
+from operator import mul, not_, itemgetter, getitem, index
+from random import randrange, sample, choice
+from sys import hexversion
+
+__all__ = [
+    'all_equal',
+    'batched',
+    'before_and_after',
+    'consume',
+    'convolve',
+    'dotproduct',
+    'first_true',
+    'factor',
+    'flatten',
+    'grouper',
+    'is_prime',
+    'iter_except',
+    'iter_index',
+    'loops',
+    'matmul',
+    'multinomial',
+    'ncycles',
+    'nth',
+    'nth_combination',
+    'padnone',
+    'pad_none',
+    'pairwise',
+    'partition',
+    'polynomial_eval',
+    'polynomial_from_roots',
+    'polynomial_derivative',
+    'powerset',
+    'prepend',
+    'quantify',
+    'reshape',
+    'random_combination_with_replacement',
+    'random_combination',
+    'random_permutation',
+    'random_product',
+    'repeatfunc',
+    'roundrobin',
+    'running_median',
+    'sieve',
+    'sliding_window',
+    'subslices',
+    'sum_of_squares',
+    'tabulate',
+    'tail',
+    'take',
+    'totient',
+    'transpose',
+    'triplewise',
+    'unique',
+    'unique_everseen',
+    'unique_justseen',
+]
+
+_marker = object()
+
+
+# zip with strict is available for Python 3.10+
+try:
+    zip(strict=True)
+except TypeError:  # pragma: no cover
+    _zip_strict = zip
+else:  # pragma: no cover
+    _zip_strict = partial(zip, strict=True)
+
+
+# math.sumprod is available for Python 3.12+
+try:
+    from math import sumprod as _sumprod
+except ImportError:  # pragma: no cover
+    _sumprod = lambda x, y: dotproduct(x, y)
+
+
+# heapq max-heap functions are available for Python 3.14+
+try:
+    from heapq import heappush_max, heappushpop_max
+except ImportError:  # pragma: no cover
+    _max_heap_available = False
+else:  # pragma: no cover
+    _max_heap_available = True
+
+
+def take(n, iterable):
+    """Return first *n* items of the *iterable* as a list.
+
+        >>> take(3, range(10))
+        [0, 1, 2]
+
+    If there are fewer than *n* items in the iterable, all of them are
+    returned.
+
+        >>> take(10, range(3))
+        [0, 1, 2]
+
+    """
+    return list(islice(iterable, n))
+
+
+def tabulate(function, start=0):
+    """Return an iterator over the results of ``func(start)``,
+    ``func(start + 1)``, ``func(start + 2)``...
+
+    *func* should be a function that accepts one integer argument.
+
+    If *start* is not specified it defaults to 0. It will be incremented each
+    time the iterator is advanced.
+
+        >>> square = lambda x: x ** 2
+        >>> iterator = tabulate(square, -3)
+        >>> take(4, iterator)
+        [9, 4, 1, 0]
+
+    """
+    return map(function, count(start))
+
+
+def tail(n, iterable):
+    """Return an iterator over the last *n* items of *iterable*.
+
+    >>> t = tail(3, 'ABCDEFG')
+    >>> list(t)
+    ['E', 'F', 'G']
+
+    """
+    try:
+        size = len(iterable)
+    except TypeError:
+        return iter(deque(iterable, maxlen=n))
+    else:
+        return islice(iterable, max(0, size - n), None)
+
+
+def consume(iterator, n=None):
+    """Advance *iterable* by *n* steps. If *n* is ``None``, consume it
+    entirely.
+
+    Efficiently exhausts an iterator without returning values. Defaults to
+    consuming the whole iterator, but an optional second argument may be
+    provided to limit consumption.
+
+        >>> i = (x for x in range(10))
+        >>> next(i)
+        0
+        >>> consume(i, 3)
+        >>> next(i)
+        4
+        >>> consume(i)
+        >>> next(i)
+        Traceback (most recent call last):
+          File "<stdin>", line 1, in <module>
+        StopIteration
+
+    If the iterator has fewer items remaining than the provided limit, the
+    whole iterator will be consumed.
+
+        >>> i = (x for x in range(3))
+        >>> consume(i, 5)
+        >>> next(i)
+        Traceback (most recent call last):
+          File "<stdin>", line 1, in <module>
+        StopIteration
+
+    """
+    # Use functions that consume iterators at C speed.
+    if n is None:
+        # feed the entire iterator into a zero-length deque
+        deque(iterator, maxlen=0)
+    else:
+        # advance to the empty slice starting at position n
+        next(islice(iterator, n, n), None)
+
+
+def nth(iterable, n, default=None):
+    """Returns the nth item or a default value.
+
+    >>> l = range(10)
+    >>> nth(l, 3)
+    3
+    >>> nth(l, 20, "zebra")
+    'zebra'
+
+    """
+    return next(islice(iterable, n, None), default)
+
+
+def all_equal(iterable, key=None):
+    """
+    Returns ``True`` if all the elements are equal to each other.
+
+        >>> all_equal('aaaa')
+        True
+        >>> all_equal('aaab')
+        False
+
+    A function that accepts a single argument and returns a transformed version
+    of each input item can be specified with *key*:
+
+        >>> all_equal('AaaA', key=str.casefold)
+        True
+        >>> all_equal([1, 2, 3], key=lambda x: x < 10)
+        True
+
+    """
+    iterator = groupby(iterable, key)
+    for first in iterator:
+        for second in iterator:
+            return False
+        return True
+    return True
+
+
+def quantify(iterable, pred=bool):
+    """Return the how many times the predicate is true.
+
+    >>> quantify([True, False, True])
+    2
+
+    """
+    return sum(map(pred, iterable))
+
+
+def pad_none(iterable):
+    """Returns the sequence of elements and then returns ``None`` indefinitely.
+
+        >>> take(5, pad_none(range(3)))
+        [0, 1, 2, None, None]
+
+    Useful for emulating the behavior of the built-in :func:`map` function.
+
+    See also :func:`padded`.
+
+    """
+    return chain(iterable, repeat(None))
+
+
+padnone = pad_none
+
+
+def ncycles(iterable, n):
+    """Returns the sequence elements *n* times
+
+    >>> list(ncycles(["a", "b"], 3))
+    ['a', 'b', 'a', 'b', 'a', 'b']
+
+    """
+    return chain.from_iterable(repeat(tuple(iterable), n))
+
+
+def dotproduct(vec1, vec2):
+    """Returns the dot product of the two iterables.
+
+    >>> dotproduct([10, 15, 12], [0.65, 0.80, 1.25])
+    33.5
+    >>> 10 * 0.65 + 15 * 0.80 + 12 * 1.25
+    33.5
+
+    In Python 3.12 and later, use ``math.sumprod()`` instead.
+    """
+    return sum(map(mul, vec1, vec2))
+
+
+def flatten(listOfLists):
+    """Return an iterator flattening one level of nesting in a list of lists.
+
+        >>> list(flatten([[0, 1], [2, 3]]))
+        [0, 1, 2, 3]
+
+    See also :func:`collapse`, which can flatten multiple levels of nesting.
+
+    """
+    return chain.from_iterable(listOfLists)
+
+
+def repeatfunc(func, times=None, *args):
+    """Call *func* with *args* repeatedly, returning an iterable over the
+    results.
+
+    If *times* is specified, the iterable will terminate after that many
+    repetitions:
+
+        >>> from operator import add
+        >>> times = 4
+        >>> args = 3, 5
+        >>> list(repeatfunc(add, times, *args))
+        [8, 8, 8, 8]
+
+    If *times* is ``None`` the iterable will not terminate:
+
+        >>> from random import randrange
+        >>> times = None
+        >>> args = 1, 11
+        >>> take(6, repeatfunc(randrange, times, *args))  # doctest:+SKIP
+        [2, 4, 8, 1, 8, 4]
+
+    """
+    if times is None:
+        return starmap(func, repeat(args))
+    return starmap(func, repeat(args, times))
+
+
+def _pairwise(iterable):
+    """Returns an iterator of paired items, overlapping, from the original
+
+    >>> take(4, pairwise(count()))
+    [(0, 1), (1, 2), (2, 3), (3, 4)]
+
+    On Python 3.10 and above, this is an alias for :func:`itertools.pairwise`.
+
+    """
+    a, b = tee(iterable)
+    next(b, None)
+    return zip(a, b)
+
+
+try:
+    from itertools import pairwise as itertools_pairwise
+except ImportError:  # pragma: no cover
+    pairwise = _pairwise
+else:  # pragma: no cover
+
+    def pairwise(iterable):
+        return itertools_pairwise(iterable)
+
+    pairwise.__doc__ = _pairwise.__doc__
+
+
+class UnequalIterablesError(ValueError):
+    def __init__(self, details=None):
+        msg = 'Iterables have different lengths'
+        if details is not None:
+            msg += (': index 0 has length {}; index {} has length {}').format(
+                *details
+            )
+
+        super().__init__(msg)
+
+
+def _zip_equal_generator(iterables):
+    for combo in zip_longest(*iterables, fillvalue=_marker):
+        for val in combo:
+            if val is _marker:
+                raise UnequalIterablesError()
+        yield combo
+
+
+def _zip_equal(*iterables):
+    # Check whether the iterables are all the same size.
+    try:
+        first_size = len(iterables[0])
+        for i, it in enumerate(iterables[1:], 1):
+            size = len(it)
+            if size != first_size:
+                raise UnequalIterablesError(details=(first_size, i, size))
+        # All sizes are equal, we can use the built-in zip.
+        return zip(*iterables)
+    # If any one of the iterables didn't have a length, start reading
+    # them until one runs out.
+    except TypeError:
+        return _zip_equal_generator(iterables)
+
+
+def grouper(iterable, n, incomplete='fill', fillvalue=None):
+    """Group elements from *iterable* into fixed-length groups of length *n*.
+
+    >>> list(grouper('ABCDEF', 3))
+    [('A', 'B', 'C'), ('D', 'E', 'F')]
+
+    The keyword arguments *incomplete* and *fillvalue* control what happens for
+    iterables whose length is not a multiple of *n*.
+
+    When *incomplete* is `'fill'`, the last group will contain instances of
+    *fillvalue*.
+
+    >>> list(grouper('ABCDEFG', 3, incomplete='fill', fillvalue='x'))
+    [('A', 'B', 'C'), ('D', 'E', 'F'), ('G', 'x', 'x')]
+
+    When *incomplete* is `'ignore'`, the last group will not be emitted.
+
+    >>> list(grouper('ABCDEFG', 3, incomplete='ignore', fillvalue='x'))
+    [('A', 'B', 'C'), ('D', 'E', 'F')]
+
+    When *incomplete* is `'strict'`, a subclass of `ValueError` will be raised.
+
+    >>> iterator = grouper('ABCDEFG', 3, incomplete='strict')
+    >>> list(iterator)  # doctest: +IGNORE_EXCEPTION_DETAIL
+    Traceback (most recent call last):
+    ...
+    UnequalIterablesError
+
+    """
+    iterators = [iter(iterable)] * n
+    if incomplete == 'fill':
+        return zip_longest(*iterators, fillvalue=fillvalue)
+    if incomplete == 'strict':
+        return _zip_equal(*iterators)
+    if incomplete == 'ignore':
+        return zip(*iterators)
+    else:
+        raise ValueError('Expected fill, strict, or ignore')
+
+
+def roundrobin(*iterables):
+    """Visit input iterables in a cycle until each is exhausted.
+
+        >>> list(roundrobin('ABC', 'D', 'EF'))
+        ['A', 'D', 'E', 'B', 'F', 'C']
+
+    This function produces the same output as :func:`interleave_longest`, but
+    may perform better for some inputs (in particular when the number of
+    iterables is small).
+
+    """
+    # Algorithm credited to George Sakkis
+    iterators = map(iter, iterables)
+    for num_active in range(len(iterables), 0, -1):
+        iterators = cycle(islice(iterators, num_active))
+        yield from map(next, iterators)
+
+
+def partition(pred, iterable):
+    """
+    Returns a 2-tuple of iterables derived from the input iterable.
+    The first yields the items that have ``pred(item) == False``.
+    The second yields the items that have ``pred(item) == True``.
+
+        >>> is_odd = lambda x: x % 2 != 0
+        >>> iterable = range(10)
+        >>> even_items, odd_items = partition(is_odd, iterable)
+        >>> list(even_items), list(odd_items)
+        ([0, 2, 4, 6, 8], [1, 3, 5, 7, 9])
+
+    If *pred* is None, :func:`bool` is used.
+
+        >>> iterable = [0, 1, False, True, '', ' ']
+        >>> false_items, true_items = partition(None, iterable)
+        >>> list(false_items), list(true_items)
+        ([0, False, ''], [1, True, ' '])
+
+    """
+    if pred is None:
+        pred = bool
+
+    t1, t2, p = tee(iterable, 3)
+    p1, p2 = tee(map(pred, p))
+    return (compress(t1, map(not_, p1)), compress(t2, p2))
+
+
+def powerset(iterable):
+    """Yields all possible subsets of the iterable.
+
+        >>> list(powerset([1, 2, 3]))
+        [(), (1,), (2,), (3,), (1, 2), (1, 3), (2, 3), (1, 2, 3)]
+
+    :func:`powerset` will operate on iterables that aren't :class:`set`
+    instances, so repeated elements in the input will produce repeated elements
+    in the output.
+
+        >>> seq = [1, 1, 0]
+        >>> list(powerset(seq))
+        [(), (1,), (1,), (0,), (1, 1), (1, 0), (1, 0), (1, 1, 0)]
+
+    For a variant that efficiently yields actual :class:`set` instances, see
+    :func:`powerset_of_sets`.
+    """
+    s = list(iterable)
+    return chain.from_iterable(combinations(s, r) for r in range(len(s) + 1))
+
+
+def unique_everseen(iterable, key=None):
+    """
+    Yield unique elements, preserving order.
+
+        >>> list(unique_everseen('AAAABBBCCDAABBB'))
+        ['A', 'B', 'C', 'D']
+        >>> list(unique_everseen('ABBCcAD', str.lower))
+        ['A', 'B', 'C', 'D']
+
+    Sequences with a mix of hashable and unhashable items can be used.
+    The function will be slower (i.e., `O(n^2)`) for unhashable items.
+
+    Remember that ``list`` objects are unhashable - you can use the *key*
+    parameter to transform the list to a tuple (which is hashable) to
+    avoid a slowdown.
+
+        >>> iterable = ([1, 2], [2, 3], [1, 2])
+        >>> list(unique_everseen(iterable))  # Slow
+        [[1, 2], [2, 3]]
+        >>> list(unique_everseen(iterable, key=tuple))  # Faster
+        [[1, 2], [2, 3]]
+
+    Similarly, you may want to convert unhashable ``set`` objects with
+    ``key=frozenset``. For ``dict`` objects,
+    ``key=lambda x: frozenset(x.items())`` can be used.
+
+    """
+    seenset = set()
+    seenset_add = seenset.add
+    seenlist = []
+    seenlist_add = seenlist.append
+    use_key = key is not None
+
+    for element in iterable:
+        k = key(element) if use_key else element
+        try:
+            if k not in seenset:
+                seenset_add(k)
+                yield element
+        except TypeError:
+            if k not in seenlist:
+                seenlist_add(k)
+                yield element
+
+
+def unique_justseen(iterable, key=None):
+    """Yields elements in order, ignoring serial duplicates
+
+    >>> list(unique_justseen('AAAABBBCCDAABBB'))
+    ['A', 'B', 'C', 'D', 'A', 'B']
+    >>> list(unique_justseen('ABBCcAD', str.lower))
+    ['A', 'B', 'C', 'A', 'D']
+
+    """
+    if key is None:
+        return map(itemgetter(0), groupby(iterable))
+
+    return map(next, map(itemgetter(1), groupby(iterable, key)))
+
+
+def unique(iterable, key=None, reverse=False):
+    """Yields unique elements in sorted order.
+
+    >>> list(unique([[1, 2], [3, 4], [1, 2]]))
+    [[1, 2], [3, 4]]
+
+    *key* and *reverse* are passed to :func:`sorted`.
+
+    >>> list(unique('ABBcCAD', str.casefold))
+    ['A', 'B', 'c', 'D']
+    >>> list(unique('ABBcCAD', str.casefold, reverse=True))
+    ['D', 'c', 'B', 'A']
+
+    The elements in *iterable* need not be hashable, but they must be
+    comparable for sorting to work.
+    """
+    sequenced = sorted(iterable, key=key, reverse=reverse)
+    return unique_justseen(sequenced, key=key)
+
+
+def iter_except(func, exception, first=None):
+    """Yields results from a function repeatedly until an exception is raised.
+
+    Converts a call-until-exception interface to an iterator interface.
+    Like ``iter(func, sentinel)``, but uses an exception instead of a sentinel
+    to end the loop.
+
+        >>> l = [0, 1, 2]
+        >>> list(iter_except(l.pop, IndexError))
+        [2, 1, 0]
+
+    Multiple exceptions can be specified as a stopping condition:
+
+        >>> l = [1, 2, 3, '...', 4, 5, 6]
+        >>> list(iter_except(lambda: 1 + l.pop(), (IndexError, TypeError)))
+        [7, 6, 5]
+        >>> list(iter_except(lambda: 1 + l.pop(), (IndexError, TypeError)))
+        [4, 3, 2]
+        >>> list(iter_except(lambda: 1 + l.pop(), (IndexError, TypeError)))
+        []
+
+    """
+    with suppress(exception):
+        if first is not None:
+            yield first()
+        while True:
+            yield func()
+
+
+def first_true(iterable, default=None, pred=None):
+    """
+    Returns the first true value in the iterable.
+
+    If no true value is found, returns *default*
+
+    If *pred* is not None, returns the first item for which
+    ``pred(item) == True`` .
+
+        >>> first_true(range(10))
+        1
+        >>> first_true(range(10), pred=lambda x: x > 5)
+        6
+        >>> first_true(range(10), default='missing', pred=lambda x: x > 9)
+        'missing'
+
+    """
+    return next(filter(pred, iterable), default)
+
+
+def random_product(*args, repeat=1):
+    """Draw an item at random from each of the input iterables.
+
+        >>> random_product('abc', range(4), 'XYZ')  # doctest:+SKIP
+        ('c', 3, 'Z')
+
+    If *repeat* is provided as a keyword argument, that many items will be
+    drawn from each iterable.
+
+        >>> random_product('abcd', range(4), repeat=2)  # doctest:+SKIP
+        ('a', 2, 'd', 3)
+
+    This equivalent to taking a random selection from
+    ``itertools.product(*args, repeat=repeat)``.
+
+    """
+    pools = [tuple(pool) for pool in args] * repeat
+    return tuple(choice(pool) for pool in pools)
+
+
+def random_permutation(iterable, r=None):
+    """Return a random *r* length permutation of the elements in *iterable*.
+
+    If *r* is not specified or is ``None``, then *r* defaults to the length of
+    *iterable*.
+
+        >>> random_permutation(range(5))  # doctest:+SKIP
+        (3, 4, 0, 1, 2)
+
+    This equivalent to taking a random selection from
+    ``itertools.permutations(iterable, r)``.
+
+    """
+    pool = tuple(iterable)
+    r = len(pool) if r is None else r
+    return tuple(sample(pool, r))
+
+
+def random_combination(iterable, r):
+    """Return a random *r* length subsequence of the elements in *iterable*.
+
+        >>> random_combination(range(5), 3)  # doctest:+SKIP
+        (2, 3, 4)
+
+    This equivalent to taking a random selection from
+    ``itertools.combinations(iterable, r)``.
+
+    """
+    pool = tuple(iterable)
+    n = len(pool)
+    indices = sorted(sample(range(n), r))
+    return tuple(pool[i] for i in indices)
+
+
+def random_combination_with_replacement(iterable, r):
+    """Return a random *r* length subsequence of elements in *iterable*,
+    allowing individual elements to be repeated.
+
+        >>> random_combination_with_replacement(range(3), 5) # doctest:+SKIP
+        (0, 0, 1, 2, 2)
+
+    This equivalent to taking a random selection from
+    ``itertools.combinations_with_replacement(iterable, r)``.
+
+    """
+    pool = tuple(iterable)
+    n = len(pool)
+    indices = sorted(randrange(n) for i in range(r))
+    return tuple(pool[i] for i in indices)
+
+
+def nth_combination(iterable, r, index):
+    """Equivalent to ``list(combinations(iterable, r))[index]``.
+
+    The subsequences of *iterable* that are of length *r* can be ordered
+    lexicographically. :func:`nth_combination` computes the subsequence at
+    sort position *index* directly, without computing the previous
+    subsequences.
+
+        >>> nth_combination(range(5), 3, 5)
+        (0, 3, 4)
+
+    ``ValueError`` will be raised If *r* is negative or greater than the length
+    of *iterable*.
+    ``IndexError`` will be raised if the given *index* is invalid.
+    """
+    pool = tuple(iterable)
+    n = len(pool)
+    if (r < 0) or (r > n):
+        raise ValueError
+
+    c = 1
+    k = min(r, n - r)
+    for i in range(1, k + 1):
+        c = c * (n - k + i) // i
+
+    if index < 0:
+        index += c
+
+    if (index < 0) or (index >= c):
+        raise IndexError
+
+    result = []
+    while r:
+        c, n, r = c * r // n, n - 1, r - 1
+        while index >= c:
+            index -= c
+            c, n = c * (n - r) // n, n - 1
+        result.append(pool[-1 - n])
+
+    return tuple(result)
+
+
+def prepend(value, iterator):
+    """Yield *value*, followed by the elements in *iterator*.
+
+        >>> value = '0'
+        >>> iterator = ['1', '2', '3']
+        >>> list(prepend(value, iterator))
+        ['0', '1', '2', '3']
+
+    To prepend multiple values, see :func:`itertools.chain`
+    or :func:`value_chain`.
+
+    """
+    return chain([value], iterator)
+
+
+def convolve(signal, kernel):
+    """Discrete linear convolution of two iterables.
+    Equivalent to polynomial multiplication.
+
+    For example, multiplying ``(x² -x - 20)`` by ``(x - 3)``
+    gives ``(x³ -4x² -17x + 60)``.
+
+        >>> list(convolve([1, -1, -20], [1, -3]))
+        [1, -4, -17, 60]
+
+    Examples of popular kinds of kernels:
+
+    * The kernel ``[0.25, 0.25, 0.25, 0.25]`` computes a moving average.
+      For image data, this blurs the image and reduces noise.
+    * The kernel ``[1/2, 0, -1/2]`` estimates the first derivative of
+      a function evaluated at evenly spaced inputs.
+    * The kernel ``[1, -2, 1]`` estimates the second derivative of a
+      function evaluated at evenly spaced inputs.
+
+    Convolutions are mathematically commutative; however, the inputs are
+    evaluated differently.  The signal is consumed lazily and can be
+    infinite. The kernel is fully consumed before the calculations begin.
+
+    Supports all numeric types: int, float, complex, Decimal, Fraction.
+
+    References:
+
+    * Article:  https://betterexplained.com/articles/intuitive-convolution/
+    * Video by 3Blue1Brown:  https://www.youtube.com/watch?v=KuXjwB4LzSA
+
+    """
+    # This implementation comes from an older version of the itertools
+    # documentation.  While the newer implementation is a bit clearer,
+    # this one was kept because the inlined window logic is faster
+    # and it avoids an unnecessary deque-to-tuple conversion.
+    kernel = tuple(kernel)[::-1]
+    n = len(kernel)
+    window = deque([0], maxlen=n) * n
+    for x in chain(signal, repeat(0, n - 1)):
+        window.append(x)
+        yield _sumprod(kernel, window)
+
+
+def before_and_after(predicate, it):
+    """A variant of :func:`takewhile` that allows complete access to the
+    remainder of the iterator.
+
+         >>> it = iter('ABCdEfGhI')
+         >>> all_upper, remainder = before_and_after(str.isupper, it)
+         >>> ''.join(all_upper)
+         'ABC'
+         >>> ''.join(remainder) # takewhile() would lose the 'd'
+         'dEfGhI'
+
+    Note that the first iterator must be fully consumed before the second
+    iterator can generate valid results.
+    """
+    trues, after = tee(it)
+    trues = compress(takewhile(predicate, trues), zip(after))
+    return trues, after
+
+
+def triplewise(iterable):
+    """Return overlapping triplets from *iterable*.
+
+    >>> list(triplewise('ABCDE'))
+    [('A', 'B', 'C'), ('B', 'C', 'D'), ('C', 'D', 'E')]
+
+    """
+    # This deviates from the itertools documentation recipe - see
+    # https://github.com/more-itertools/more-itertools/issues/889
+    t1, t2, t3 = tee(iterable, 3)
+    next(t3, None)
+    next(t3, None)
+    next(t2, None)
+    return zip(t1, t2, t3)
+
+
+def _sliding_window_islice(iterable, n):
+    # Fast path for small, non-zero values of n.
+    iterators = tee(iterable, n)
+    for i, iterator in enumerate(iterators):
+        next(islice(iterator, i, i), None)
+    return zip(*iterators)
+
+
+def _sliding_window_deque(iterable, n):
+    # Normal path for other values of n.
+    iterator = iter(iterable)
+    window = deque(islice(iterator, n - 1), maxlen=n)
+    for x in iterator:
+        window.append(x)
+        yield tuple(window)
+
+
+def sliding_window(iterable, n):
+    """Return a sliding window of width *n* over *iterable*.
+
+        >>> list(sliding_window(range(6), 4))
+        [(0, 1, 2, 3), (1, 2, 3, 4), (2, 3, 4, 5)]
+
+    If *iterable* has fewer than *n* items, then nothing is yielded:
+
+        >>> list(sliding_window(range(3), 4))
+        []
+
+    For a variant with more features, see :func:`windowed`.
+    """
+    if n > 20:
+        return _sliding_window_deque(iterable, n)
+    elif n > 2:
+        return _sliding_window_islice(iterable, n)
+    elif n == 2:
+        return pairwise(iterable)
+    elif n == 1:
+        return zip(iterable)
+    else:
+        raise ValueError(f'n should be at least one, not {n}')
+
+
+def subslices(iterable):
+    """Return all contiguous non-empty subslices of *iterable*.
+
+        >>> list(subslices('ABC'))
+        [['A'], ['A', 'B'], ['A', 'B', 'C'], ['B'], ['B', 'C'], ['C']]
+
+    This is similar to :func:`substrings`, but emits items in a different
+    order.
+    """
+    seq = list(iterable)
+    slices = starmap(slice, combinations(range(len(seq) + 1), 2))
+    return map(getitem, repeat(seq), slices)
+
+
+def polynomial_from_roots(roots):
+    """Compute a polynomial's coefficients from its roots.
+
+    >>> roots = [5, -4, 3]            # (x - 5) * (x + 4) * (x - 3)
+    >>> polynomial_from_roots(roots)  # x³ - 4 x² - 17 x + 60
+    [1, -4, -17, 60]
+
+    Note that polynomial coefficients are specified in descending power order.
+
+    Supports all numeric types: int, float, complex, Decimal, Fraction.
+    """
+
+    # This recipe differs from the one in itertools docs in that it
+    # applies list() after each call to convolve().  This avoids
+    # hitting stack limits with nested generators.
+
+    poly = [1]
+    for root in roots:
+        poly = list(convolve(poly, (1, -root)))
+    return poly
+
+
+def iter_index(iterable, value, start=0, stop=None):
+    """Yield the index of each place in *iterable* that *value* occurs,
+    beginning with index *start* and ending before index *stop*.
+
+
+    >>> list(iter_index('AABCADEAF', 'A'))
+    [0, 1, 4, 7]
+    >>> list(iter_index('AABCADEAF', 'A', 1))  # start index is inclusive
+    [1, 4, 7]
+    >>> list(iter_index('AABCADEAF', 'A', 1, 7))  # stop index is not inclusive
+    [1, 4]
+
+    The behavior for non-scalar *values* matches the built-in Python types.
+
+    >>> list(iter_index('ABCDABCD', 'AB'))
+    [0, 4]
+    >>> list(iter_index([0, 1, 2, 3, 0, 1, 2, 3], [0, 1]))
+    []
+    >>> list(iter_index([[0, 1], [2, 3], [0, 1], [2, 3]], [0, 1]))
+    [0, 2]
+
+    See :func:`locate` for a more general means of finding the indexes
+    associated with particular values.
+
+    """
+    seq_index = getattr(iterable, 'index', None)
+    if seq_index is None:
+        # Slow path for general iterables
+        iterator = islice(iterable, start, stop)
+        for i, element in enumerate(iterator, start):
+            if element is value or element == value:
+                yield i
+    else:
+        # Fast path for sequences
+        stop = len(iterable) if stop is None else stop
+        i = start - 1
+        with suppress(ValueError):
+            while True:
+                yield (i := seq_index(value, i + 1, stop))
+
+
+def sieve(n):
+    """Yield the primes less than n.
+
+    >>> list(sieve(30))
+    [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]
+
+    """
+    # This implementation comes from an older version of the itertools
+    # documentation.  The newer implementation is easier to read but is
+    # less lazy.
+    if n > 2:
+        yield 2
+    start = 3
+    data = bytearray((0, 1)) * (n // 2)
+    for p in iter_index(data, 1, start, stop=isqrt(n) + 1):
+        yield from iter_index(data, 1, start, p * p)
+        data[p * p : n : p + p] = bytes(len(range(p * p, n, p + p)))
+        start = p * p
+    yield from iter_index(data, 1, start)
+
+
+def _batched(iterable, n, *, strict=False):  # pragma: no cover
+    """Batch data into tuples of length *n*. If the number of items in
+    *iterable* is not divisible by *n*:
+    * The last batch will be shorter if *strict* is ``False``.
+    * :exc:`ValueError` will be raised if *strict* is ``True``.
+
+    >>> list(batched('ABCDEFG', 3))
+    [('A', 'B', 'C'), ('D', 'E', 'F'), ('G',)]
+
+    On Python 3.13 and above, this is an alias for :func:`itertools.batched`.
+    """
+    if n < 1:
+        raise ValueError('n must be at least one')
+    iterator = iter(iterable)
+    while batch := tuple(islice(iterator, n)):
+        if strict and len(batch) != n:
+            raise ValueError('batched(): incomplete batch')
+        yield batch
+
+
+if hexversion >= 0x30D00A2:  # pragma: no cover
+    from itertools import batched as itertools_batched
+
+    def batched(iterable, n, *, strict=False):
+        return itertools_batched(iterable, n, strict=strict)
+
+    batched.__doc__ = _batched.__doc__
+else:  # pragma: no cover
+    batched = _batched
+
+
+def transpose(it):
+    """Swap the rows and columns of the input matrix.
+
+    >>> list(transpose([(1, 2, 3), (11, 22, 33)]))
+    [(1, 11), (2, 22), (3, 33)]
+
+    The caller should ensure that the dimensions of the input are compatible.
+    If the input is empty, no output will be produced.
+    """
+    return _zip_strict(*it)
+
+
+def _is_scalar(value, stringlike=(str, bytes)):
+    "Scalars are bytes, strings, and non-iterables."
+    try:
+        iter(value)
+    except TypeError:
+        return True
+    return isinstance(value, stringlike)
+
+
+def _flatten_tensor(tensor):
+    "Depth-first iterator over scalars in a tensor."
+    iterator = iter(tensor)
+    while True:
+        try:
+            value = next(iterator)
+        except StopIteration:
+            return iterator
+        iterator = chain((value,), iterator)
+        if _is_scalar(value):
+            return iterator
+        iterator = chain.from_iterable(iterator)
+
+
+def reshape(matrix, shape):
+    """Change the shape of a *matrix*.
+
+    If *shape* is an integer, the matrix must be two dimensional
+    and the shape is interpreted as the desired number of columns:
+
+        >>> matrix = [(0, 1), (2, 3), (4, 5)]
+        >>> cols = 3
+        >>> list(reshape(matrix, cols))
+        [(0, 1, 2), (3, 4, 5)]
+
+    If *shape* is a tuple (or other iterable), the input matrix can have
+    any number of dimensions. It will first be flattened and then rebuilt
+    to the desired shape which can also be multidimensional:
+
+        >>> matrix = [(0, 1), (2, 3), (4, 5)]    # Start with a 3 x 2 matrix
+
+        >>> list(reshape(matrix, (2, 3)))        # Make a 2 x 3 matrix
+        [(0, 1, 2), (3, 4, 5)]
+
+        >>> list(reshape(matrix, (6,)))          # Make a vector of length six
+        [0, 1, 2, 3, 4, 5]
+
+        >>> list(reshape(matrix, (2, 1, 3, 1)))  # Make 2 x 1 x 3 x 1 tensor
+        [(((0,), (1,), (2,)),), (((3,), (4,), (5,)),)]
+
+    Each dimension is assumed to be uniform, either all arrays or all scalars.
+    Flattening stops when the first value in a dimension is a scalar.
+    Scalars are bytes, strings, and non-iterables.
+    The reshape iterator stops when the requested shape is complete
+    or when the input is exhausted, whichever comes first.
+
+    """
+    if isinstance(shape, int):
+        return batched(chain.from_iterable(matrix), shape)
+    first_dim, *dims = shape
+    scalar_stream = _flatten_tensor(matrix)
+    reshaped = reduce(batched, reversed(dims), scalar_stream)
+    return islice(reshaped, first_dim)
+
+
+def matmul(m1, m2):
+    """Multiply two matrices.
+
+    >>> list(matmul([(7, 5), (3, 5)], [(2, 5), (7, 9)]))
+    [(49, 80), (41, 60)]
+
+    The caller should ensure that the dimensions of the input matrices are
+    compatible with each other.
+
+    Supports all numeric types: int, float, complex, Decimal, Fraction.
+    """
+    n = len(m2[0])
+    return batched(starmap(_sumprod, product(m1, transpose(m2))), n)
+
+
+def _factor_pollard(n):
+    # Return a factor of n using Pollard's rho algorithm.
+    # Efficient when n is odd and composite.
+    for b in range(1, n):
+        x = y = 2
+        d = 1
+        while d == 1:
+            x = (x * x + b) % n
+            y = (y * y + b) % n
+            y = (y * y + b) % n
+            d = gcd(x - y, n)
+        if d != n:
+            return d
+    raise ValueError('prime or under 5')  # pragma: no cover
+
+
+_primes_below_211 = tuple(sieve(211))
+
+
+def factor(n):
+    """Yield the prime factors of n.
+
+    >>> list(factor(360))
+    [2, 2, 2, 3, 3, 5]
+
+    Finds small factors with trial division.  Larger factors are
+    either verified as prime with ``is_prime`` or split into
+    smaller factors with Pollard's rho algorithm.
+    """
+
+    # Corner case reduction
+    if n < 2:
+        return
+
+    # Trial division reduction
+    for prime in _primes_below_211:
+        while not n % prime:
+            yield prime
+            n //= prime
+
+    # Pollard's rho reduction
+    primes = []
+    todo = [n] if n > 1 else []
+    for n in todo:
+        if n < 211**2 or is_prime(n):
+            primes.append(n)
+        else:
+            fact = _factor_pollard(n)
+            todo += (fact, n // fact)
+    yield from sorted(primes)
+
+
+def polynomial_eval(coefficients, x):
+    """Evaluate a polynomial at a specific value.
+
+    Computes with better numeric stability than Horner's method.
+
+    Evaluate ``x^3 - 4 * x^2 - 17 * x + 60`` at ``x = 2.5``:
+
+    >>> coefficients = [1, -4, -17, 60]
+    >>> x = 2.5
+    >>> polynomial_eval(coefficients, x)
+    8.125
+
+    Note that polynomial coefficients are specified in descending power order.
+
+    Supports all numeric types: int, float, complex, Decimal, Fraction.
+    """
+    n = len(coefficients)
+    if n == 0:
+        return type(x)(0)
+    powers = map(pow, repeat(x), reversed(range(n)))
+    return _sumprod(coefficients, powers)
+
+
+def sum_of_squares(it):
+    """Return the sum of the squares of the input values.
+
+    >>> sum_of_squares([10, 20, 30])
+    1400
+
+    Supports all numeric types: int, float, complex, Decimal, Fraction.
+    """
+    return _sumprod(*tee(it))
+
+
+def polynomial_derivative(coefficients):
+    """Compute the first derivative of a polynomial.
+
+    Evaluate the derivative of ``x³ - 4 x² - 17 x + 60``:
+
+    >>> coefficients = [1, -4, -17, 60]
+    >>> derivative_coefficients = polynomial_derivative(coefficients)
+    >>> derivative_coefficients
+    [3, -8, -17]
+
+    Note that polynomial coefficients are specified in descending power order.
+
+    Supports all numeric types: int, float, complex, Decimal, Fraction.
+    """
+    n = len(coefficients)
+    powers = reversed(range(1, n))
+    return list(map(mul, coefficients, powers))
+
+
+def totient(n):
+    """Return the count of natural numbers up to *n* that are coprime with *n*.
+
+    Euler's totient function φ(n) gives the number of totatives.
+    Totative are integers k in the range 1 ≤ k ≤ n such that gcd(n, k) = 1.
+
+    >>> n = 9
+    >>> totient(n)
+    6
+
+    >>> totatives = [x for x in range(1, n) if gcd(n, x) == 1]
+    >>> totatives
+    [1, 2, 4, 5, 7, 8]
+    >>> len(totatives)
+    6
+
+    Reference:  https://en.wikipedia.org/wiki/Euler%27s_totient_function
+
+    """
+    for prime in set(factor(n)):
+        n -= n // prime
+    return n
+
+
+# Miller–Rabin primality test: https://oeis.org/A014233
+_perfect_tests = [
+    (2047, (2,)),
+    (9080191, (31, 73)),
+    (4759123141, (2, 7, 61)),
+    (1122004669633, (2, 13, 23, 1662803)),
+    (2152302898747, (2, 3, 5, 7, 11)),
+    (3474749660383, (2, 3, 5, 7, 11, 13)),
+    (18446744073709551616, (2, 325, 9375, 28178, 450775, 9780504, 1795265022)),
+    (
+        3317044064679887385961981,
+        (2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41),
+    ),
+]
+
+
+@lru_cache
+def _shift_to_odd(n):
+    'Return s, d such that 2**s * d == n'
+    s = ((n - 1) ^ n).bit_length() - 1
+    d = n >> s
+    assert (1 << s) * d == n and d & 1 and s >= 0
+    return s, d
+
+
+def _strong_probable_prime(n, base):
+    assert (n > 2) and (n & 1) and (2 <= base < n)
+
+    s, d = _shift_to_odd(n - 1)
+
+    x = pow(base, d, n)
+    if x == 1 or x == n - 1:
+        return True
+
+    for _ in range(s - 1):
+        x = x * x % n
+        if x == n - 1:
+            return True
+
+    return False
+
+
+# Separate instance of Random() that doesn't share state
+# with the default user instance of Random().
+_private_randrange = random.Random().randrange
+
+
+def is_prime(n):
+    """Return ``True`` if *n* is prime and ``False`` otherwise.
+
+    Basic examples:
+
+        >>> is_prime(37)
+        True
+        >>> is_prime(3 * 13)
+        False
+        >>> is_prime(18_446_744_073_709_551_557)
+        True
+
+    Find the next prime over one billion:
+
+        >>> next(filter(is_prime, count(10**9)))
+        1000000007
+
+    Generate random primes up to 200 bits and up to 60 decimal digits:
+
+        >>> from random import seed, randrange, getrandbits
+        >>> seed(18675309)
+
+        >>> next(filter(is_prime, map(getrandbits, repeat(200))))
+        893303929355758292373272075469392561129886005037663238028407
+
+        >>> next(filter(is_prime, map(randrange, repeat(10**60))))
+        269638077304026462407872868003560484232362454342414618963649
+
+    This function is exact for values of *n* below 10**24.  For larger inputs,
+    the probabilistic Miller-Rabin primality test has a less than 1 in 2**128
+    chance of a false positive.
+    """
+
+    if n < 17:
+        return n in {2, 3, 5, 7, 11, 13}
+
+    if not (n & 1 and n % 3 and n % 5 and n % 7 and n % 11 and n % 13):
+        return False
+
+    for limit, bases in _perfect_tests:
+        if n < limit:
+            break
+    else:
+        bases = (_private_randrange(2, n - 1) for i in range(64))
+
+    return all(_strong_probable_prime(n, base) for base in bases)
+
+
+def loops(n):
+    """Returns an iterable with *n* elements for efficient looping.
+    Like ``range(n)`` but doesn't create integers.
+
+    >>> i = 0
+    >>> for _ in loops(5):
+    ...     i += 1
+    >>> i
+    5
+
+    """
+    return repeat(None, n)
+
+
+def multinomial(*counts):
+    """Number of distinct arrangements of a multiset.
+
+    The expression ``multinomial(3, 4, 2)`` has several equivalent
+    interpretations:
+
+    * In the expansion of ``(a + b + c)⁹``, the coefficient of the
+      ``a³b⁴c²`` term is 1260.
+
+    * There are 1260 distinct ways to arrange 9 balls consisting of 3 reds, 4
+      greens, and 2 blues.
+
+    * There are 1260 unique ways to place 9 distinct objects into three bins
+      with sizes 3, 4, and 2.
+
+    The :func:`multinomial` function computes the length of
+    :func:`distinct_permutations`.  For example, there are 83,160 distinct
+    anagrams of the word "abracadabra":
+
+        >>> from more_itertools import distinct_permutations, ilen
+        >>> ilen(distinct_permutations('abracadabra'))
+        83160
+
+    This can be computed directly from the letter counts, 5a 2b 2r 1c 1d:
+
+        >>> from collections import Counter
+        >>> list(Counter('abracadabra').values())
+        [5, 2, 2, 1, 1]
+        >>> multinomial(5, 2, 2, 1, 1)
+        83160
+
+    A binomial coefficient is a special case of multinomial where there are
+    only two categories.  For example, the number of ways to arrange 12 balls
+    with 5 reds and 7 blues is ``multinomial(5, 7)`` or ``math.comb(12, 5)``.
+
+    Likewise, factorial is a special case of multinomial where
+    the multiplicities are all just 1 so that
+    ``multinomial(1, 1, 1, 1, 1, 1, 1) == math.factorial(7)``.
+
+    Reference:  https://en.wikipedia.org/wiki/Multinomial_theorem
+
+    """
+    return prod(map(comb, accumulate(counts), counts))
+
+
+def _running_median_minheap_and_maxheap(iterator):  # pragma: no cover
+    "Non-windowed running_median() for Python 3.14+"
+
+    read = iterator.__next__
+    lo = []  # max-heap
+    hi = []  # min-heap (same size as or one smaller than lo)
+
+    with suppress(StopIteration):
+        while True:
+            heappush_max(lo, heappushpop(hi, read()))
+            yield lo[0]
+
+            heappush(hi, heappushpop_max(lo, read()))
+            yield (lo[0] + hi[0]) / 2
+
+
+def _running_median_minheap_only(iterator):  # pragma: no cover
+    "Backport of non-windowed running_median() for Python 3.13 and prior."
+
+    read = iterator.__next__
+    lo = []  # max-heap (actually a minheap with negated values)
+    hi = []  # min-heap (same size as or one smaller than lo)
+
+    with suppress(StopIteration):
+        while True:
+            heappush(lo, -heappushpop(hi, read()))
+            yield -lo[0]
+
+            heappush(hi, -heappushpop(lo, -read()))
+            yield (hi[0] - lo[0]) / 2
+
+
+def _running_median_windowed(iterator, maxlen):
+    "Yield median of values in a sliding window."
+
+    window = deque()
+    ordered = []
+
+    for x in iterator:
+        window.append(x)
+        insort(ordered, x)
+
+        if len(ordered) > maxlen:
+            i = bisect_left(ordered, window.popleft())
+            del ordered[i]
+
+        n = len(ordered)
+        m = n // 2
+        yield ordered[m] if n & 1 else (ordered[m - 1] + ordered[m]) / 2
+
+
+def running_median(iterable, *, maxlen=None):
+    """Cumulative median of values seen so far or values in a sliding window.
+
+    Set *maxlen* to a positive integer to specify the maximum size
+    of the sliding window.  The default of *None* is equivalent to
+    an unbounded window.
+
+    For example:
+
+        >>> list(running_median([5.0, 9.0, 4.0, 12.0, 8.0, 9.0]))
+        [5.0, 7.0, 5.0, 7.0, 8.0, 8.5]
+        >>> list(running_median([5.0, 9.0, 4.0, 12.0, 8.0, 9.0], maxlen=3))
+        [5.0, 7.0, 5.0, 9.0, 8.0, 9.0]
+
+    Supports numeric types such as int, float, Decimal, and Fraction,
+    but not complex numbers which are unorderable.
+
+    On version Python 3.13 and prior, max-heaps are simulated with
+    negative values. The negation causes Decimal inputs to apply context
+    rounding, making the results slightly different than that obtained
+    by statistics.median().
+    """
+
+    iterator = iter(iterable)
+
+    if maxlen is not None:
+        maxlen = index(maxlen)
+        if maxlen <= 0:
+            raise ValueError('Window size should be positive')
+        return _running_median_windowed(iterator, maxlen)
+
+    if not _max_heap_available:
+        return _running_median_minheap_only(iterator)  # pragma: no cover
+
+    return _running_median_minheap_and_maxheap(iterator)  # pragma: no cover

python/Lib/site-packages/setuptools/_vendor/more_itertools/recipes.pyi

@@ -0,0 +1,205 @@
+"""Stubs for more_itertools.recipes"""
+
+from __future__ import annotations
+
+from collections.abc import Iterable, Iterator, Sequence
+from decimal import Decimal
+from fractions import Fraction
+from typing import (
+    Any,
+    Callable,
+    TypeVar,
+    overload,
+)
+
+__all__ = [
+    'all_equal',
+    'batched',
+    'before_and_after',
+    'consume',
+    'convolve',
+    'dotproduct',
+    'first_true',
+    'factor',
+    'flatten',
+    'grouper',
+    'is_prime',
+    'iter_except',
+    'iter_index',
+    'loops',
+    'matmul',
+    'multinomial',
+    'ncycles',
+    'nth',
+    'nth_combination',
+    'padnone',
+    'pad_none',
+    'pairwise',
+    'partition',
+    'polynomial_eval',
+    'polynomial_from_roots',
+    'polynomial_derivative',
+    'powerset',
+    'prepend',
+    'quantify',
+    'reshape',
+    'random_combination_with_replacement',
+    'random_combination',
+    'random_permutation',
+    'random_product',
+    'repeatfunc',
+    'roundrobin',
+    'running_median',
+    'sieve',
+    'sliding_window',
+    'subslices',
+    'sum_of_squares',
+    'tabulate',
+    'tail',
+    'take',
+    'totient',
+    'transpose',
+    'triplewise',
+    'unique',
+    'unique_everseen',
+    'unique_justseen',
+]
+
+# Type and type variable definitions
+_T = TypeVar('_T')
+_T1 = TypeVar('_T1')
+_T2 = TypeVar('_T2')
+_U = TypeVar('_U')
+_NumberT = TypeVar("_NumberT", float, Decimal, Fraction)
+
+def take(n: int, iterable: Iterable[_T]) -> list[_T]: ...
+def tabulate(
+    function: Callable[[int], _T], start: int = ...
+) -> Iterator[_T]: ...
+def tail(n: int, iterable: Iterable[_T]) -> Iterator[_T]: ...
+def consume(iterator: Iterable[_T], n: int | None = ...) -> None: ...
+@overload
+def nth(iterable: Iterable[_T], n: int) -> _T | None: ...
+@overload
+def nth(iterable: Iterable[_T], n: int, default: _U) -> _T | _U: ...
+def all_equal(
+    iterable: Iterable[_T], key: Callable[[_T], _U] | None = ...
+) -> bool: ...
+def quantify(
+    iterable: Iterable[_T], pred: Callable[[_T], bool] = ...
+) -> int: ...
+def pad_none(iterable: Iterable[_T]) -> Iterator[_T | None]: ...
+def padnone(iterable: Iterable[_T]) -> Iterator[_T | None]: ...
+def ncycles(iterable: Iterable[_T], n: int) -> Iterator[_T]: ...
+def dotproduct(vec1: Iterable[_T1], vec2: Iterable[_T2]) -> Any: ...
+def flatten(listOfLists: Iterable[Iterable[_T]]) -> Iterator[_T]: ...
+def repeatfunc(
+    func: Callable[..., _U], times: int | None = ..., *args: Any
+) -> Iterator[_U]: ...
+def pairwise(iterable: Iterable[_T]) -> Iterator[tuple[_T, _T]]: ...
+def grouper(
+    iterable: Iterable[_T],
+    n: int,
+    incomplete: str = ...,
+    fillvalue: _U = ...,
+) -> Iterator[tuple[_T | _U, ...]]: ...
+def roundrobin(*iterables: Iterable[_T]) -> Iterator[_T]: ...
+def partition(
+    pred: Callable[[_T], object] | None, iterable: Iterable[_T]
+) -> tuple[Iterator[_T], Iterator[_T]]: ...
+def powerset(iterable: Iterable[_T]) -> Iterator[tuple[_T, ...]]: ...
+def unique_everseen(
+    iterable: Iterable[_T], key: Callable[[_T], _U] | None = ...
+) -> Iterator[_T]: ...
+def unique_justseen(
+    iterable: Iterable[_T], key: Callable[[_T], object] | None = ...
+) -> Iterator[_T]: ...
+def unique(
+    iterable: Iterable[_T],
+    key: Callable[[_T], object] | None = ...,
+    reverse: bool = False,
+) -> Iterator[_T]: ...
+@overload
+def iter_except(
+    func: Callable[[], _T],
+    exception: type[BaseException] | tuple[type[BaseException], ...],
+    first: None = ...,
+) -> Iterator[_T]: ...
+@overload
+def iter_except(
+    func: Callable[[], _T],
+    exception: type[BaseException] | tuple[type[BaseException], ...],
+    first: Callable[[], _U],
+) -> Iterator[_T | _U]: ...
+@overload
+def first_true(
+    iterable: Iterable[_T], *, pred: Callable[[_T], object] | None = ...
+) -> _T | None: ...
+@overload
+def first_true(
+    iterable: Iterable[_T],
+    default: _U,
+    pred: Callable[[_T], object] | None = ...,
+) -> _T | _U: ...
+def random_product(
+    *args: Iterable[_T], repeat: int = ...
+) -> tuple[_T, ...]: ...
+def random_permutation(
+    iterable: Iterable[_T], r: int | None = ...
+) -> tuple[_T, ...]: ...
+def random_combination(iterable: Iterable[_T], r: int) -> tuple[_T, ...]: ...
+def random_combination_with_replacement(
+    iterable: Iterable[_T], r: int
+) -> tuple[_T, ...]: ...
+def nth_combination(
+    iterable: Iterable[_T], r: int, index: int
+) -> tuple[_T, ...]: ...
+def prepend(value: _T, iterator: Iterable[_U]) -> Iterator[_T | _U]: ...
+def convolve(signal: Iterable[_T], kernel: Iterable[_T]) -> Iterator[_T]: ...
+def before_and_after(
+    predicate: Callable[[_T], bool], it: Iterable[_T]
+) -> tuple[Iterator[_T], Iterator[_T]]: ...
+def triplewise(iterable: Iterable[_T]) -> Iterator[tuple[_T, _T, _T]]: ...
+def sliding_window(
+    iterable: Iterable[_T], n: int
+) -> Iterator[tuple[_T, ...]]: ...
+def subslices(iterable: Iterable[_T]) -> Iterator[list[_T]]: ...
+def polynomial_from_roots(roots: Sequence[_T]) -> list[_T]: ...
+def iter_index(
+    iterable: Iterable[_T],
+    value: Any,
+    start: int | None = ...,
+    stop: int | None = ...,
+) -> Iterator[int]: ...
+def sieve(n: int) -> Iterator[int]: ...
+def _batched(
+    iterable: Iterable[_T], n: int, *, strict: bool = False
+) -> Iterator[tuple[_T, ...]]: ...
+
+batched = _batched
+
+def transpose(
+    it: Iterable[Iterable[_T]],
+) -> Iterator[tuple[_T, ...]]: ...
+@overload
+def reshape(
+    matrix: Iterable[Iterable[_T]], shape: int
+) -> Iterator[tuple[_T, ...]]: ...
+@overload
+def reshape(matrix: Iterable[Any], shape: Iterable[int]) -> Iterator[Any]: ...
+def matmul(m1: Sequence[_T], m2: Sequence[_T]) -> Iterator[tuple[_T]]: ...
+def _factor_trial(n: int) -> Iterator[int]: ...
+def _factor_pollard(n: int) -> int: ...
+def factor(n: int) -> Iterator[int]: ...
+def polynomial_eval(coefficients: Sequence[_T], x: _U) -> _U: ...
+def sum_of_squares(it: Iterable[_T]) -> _T: ...
+def polynomial_derivative(coefficients: Sequence[_T]) -> list[_T]: ...
+def totient(n: int) -> int: ...
+def _shift_to_odd(n: int) -> tuple[int, int]: ...
+def _strong_probable_prime(n: int, base: int) -> bool: ...
+def is_prime(n: int) -> bool: ...
+def loops(n: int) -> Iterator[None]: ...
+def multinomial(*counts: int) -> int: ...
+def running_median(
+    iterable: Iterable[_NumberT], *, maxlen: int | None = ...
+) -> Iterator[_NumberT]: ...

python/Lib/site-packages/setuptools/_vendor/packaging-26.0.dist-info/INSTALLER

@@ -0,0 +1 @@
+uv

python/Lib/site-packages/setuptools/_vendor/packaging-26.0.dist-info/METADATA

@@ -0,0 +1,107 @@
+Metadata-Version: 2.4
+Name: packaging
+Version: 26.0
+Summary: Core utilities for Python packages
+Author-email: Donald Stufft <donald@stufft.io>
+Requires-Python: >=3.8
+Description-Content-Type: text/x-rst
+License-Expression: Apache-2.0 OR BSD-2-Clause
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3 :: Only
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: 3.11
+Classifier: Programming Language :: Python :: 3.12
+Classifier: Programming Language :: Python :: 3.13
+Classifier: Programming Language :: Python :: 3.14
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Typing :: Typed
+License-File: LICENSE
+License-File: LICENSE.APACHE
+License-File: LICENSE.BSD
+Project-URL: Documentation, https://packaging.pypa.io/
+Project-URL: Source, https://github.com/pypa/packaging
+
+packaging
+=========
+
+.. start-intro
+
+Reusable core utilities for various Python Packaging
+`interoperability specifications <https://packaging.python.org/specifications/>`_.
+
+This library provides utilities that implement the interoperability
+specifications which have clearly one correct behaviour (eg: :pep:`440`)
+or benefit greatly from having a single shared implementation (eg: :pep:`425`).
+
+.. end-intro
+
+The ``packaging`` project includes the following: version handling, specifiers,
+markers, requirements, tags, metadata, lockfiles, utilities.
+
+Documentation
+-------------
+
+The `documentation`_ provides information and the API for the following:
+
+- Version Handling
+- Specifiers
+- Markers
+- Requirements
+- Tags
+- Metadata
+- Lockfiles
+- Utilities
+
+Installation
+------------
+
+Use ``pip`` to install these utilities::
+
+    pip install packaging
+
+The ``packaging`` library uses calendar-based versioning (``YY.N``).
+
+Discussion
+----------
+
+If you run into bugs, you can file them in our `issue tracker`_.
+
+You can also join ``#pypa`` on Freenode to ask questions or get involved.
+
+
+.. _`documentation`: https://packaging.pypa.io/
+.. _`issue tracker`: https://github.com/pypa/packaging/issues
+
+
+Code of Conduct
+---------------
+
+Everyone interacting in the packaging project's codebases, issue trackers, chat
+rooms, and mailing lists is expected to follow the `PSF Code of Conduct`_.
+
+.. _PSF Code of Conduct: https://github.com/pypa/.github/blob/main/CODE_OF_CONDUCT.md
+
+Contributing
+------------
+
+The ``CONTRIBUTING.rst`` file outlines how to contribute to this project as
+well as how to report a potential security issue. The documentation for this
+project also covers information about `project development`_ and `security`_.
+
+.. _`project development`: https://packaging.pypa.io/en/latest/development/
+.. _`security`: https://packaging.pypa.io/en/latest/security/
+
+Project History
+---------------
+
+Please review the ``CHANGELOG.rst`` file or the `Changelog documentation`_ for
+recent changes and project history.
+
+.. _`Changelog documentation`: https://packaging.pypa.io/en/latest/changelog/
+

python/Lib/site-packages/setuptools/_vendor/packaging-26.0.dist-info/RECORD

@@ -0,0 +1,26 @@
+packaging-26.0.dist-info/INSTALLER,sha256=5hhM4Q4mYTT9z6QB6PGpUAW81PGNFrYrdXMj4oM_6ak,2
+packaging-26.0.dist-info/METADATA,sha256=M2K7fWom2iliuo2qpHhc0LrKwhq6kIoRlcyPWVgKJlo,3309
+packaging-26.0.dist-info/RECORD,,
+packaging-26.0.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+packaging-26.0.dist-info/WHEEL,sha256=G2gURzTEtmeR8nrdXUJfNiB3VYVxigPQ-bEQujpNiNs,82
+packaging-26.0.dist-info/licenses/LICENSE,sha256=ytHvW9NA1z4HS6YU0m996spceUDD2MNIUuZcSQlobEg,197
+packaging-26.0.dist-info/licenses/LICENSE.APACHE,sha256=DVQuDIgE45qn836wDaWnYhSdxoLXgpRRKH4RuTjpRZQ,10174
+packaging-26.0.dist-info/licenses/LICENSE.BSD,sha256=tw5-m3QvHMb5SLNMFqo5_-zpQZY2S8iP8NIYDwAo-sU,1344
+packaging/__init__.py,sha256=y4lVbpeBzCGk-IPDw5BGBZ_b0P3ukEEJZAbGYc6Ey8c,494
+packaging/_elffile.py,sha256=-sKkptYqzYw2-x3QByJa5mB4rfPWu1pxkZHRx1WAFCY,3211
+packaging/_manylinux.py,sha256=Hf6nB0cOrayEs96-p3oIXAgGnFquv20DO5l-o2_Xnv0,9559
+packaging/_musllinux.py,sha256=Z6swjH3MA7XS3qXnmMN7QPhqP3fnoYI0eQ18e9-HgAE,2707
+packaging/_parser.py,sha256=U_DajsEx2VoC_F46fSVV3hDKNCWoQYkPkasO3dld0ig,10518
+packaging/_structures.py,sha256=Hn49Ta8zV9Wo8GiCL8Nl2ARZY983Un3pruZGVNldPwE,1514
+packaging/_tokenizer.py,sha256=M8EwNIdXeL9NMFuFrQtiOKwjka_xFx8KjRQnfE8O_z8,5421
+packaging/licenses/__init__.py,sha256=TwXLHZCXwSgdFwRLPxW602T6mSieunSFHM6fp8pgW78,5819
+packaging/licenses/_spdx.py,sha256=WW7DXiyg68up_YND_wpRYlr1SHhiV4FfJLQffghhMxQ,51122
+packaging/markers.py,sha256=ZX-cLvW1S3cZcEc0fHI4z7zSx5U2T19yMpDP_mE-CYw,12771
+packaging/metadata.py,sha256=CWVZpN_HfoYMSSDuCP7igOvGgqA9AOmpW8f3qTisfnc,39360
+packaging/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+packaging/pylock.py,sha256=-R1uNfJ4PaLto7Mg62YsGOHgvskuiIEqPwxOywl42Jk,22537
+packaging/requirements.py,sha256=PMCAWD8aNMnVD-6uZMedhBuAVX2573eZ4yPBLXmz04I,2870
+packaging/specifiers.py,sha256=EPNPimY_zFivthv1vdjZYz5IqkKGsnKR2yKh-EVyvZw,40797
+packaging/tags.py,sha256=cXLV1pJD3UtJlDg7Wz3zrfdQhRZqr8jumSAKKAAd2xE,22856
+packaging/utils.py,sha256=N4c6oZzFJy6klTZ3AnkNz7sSkJesuFWPp68LA3B5dAo,5040
+packaging/version.py,sha256=7XWlL2IDYLwDYC0ht6cFEhapLwLWbmyo4rb7sEFj0x8,23272

python/Lib/site-packages/setuptools/_vendor/packaging-26.0.dist-info/WHEEL

@@ -0,0 +1,4 @@
+Wheel-Version: 1.0
+Generator: flit 3.12.0
+Root-Is-Purelib: true
+Tag: py3-none-any

python/Lib/site-packages/setuptools/_vendor/packaging/__init__.py

@@ -0,0 +1,15 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
+
+__version__ = "26.0"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD-2-Clause or Apache-2.0"
+__copyright__ = f"2014 {__author__}"

python/Lib/site-packages/setuptools/_vendor/packaging/_elffile.py

@@ -0,0 +1,108 @@
+"""
+ELF file parser.
+
+This provides a class ``ELFFile`` that parses an ELF executable in a similar
+interface to ``ZipFile``. Only the read interface is implemented.
+
+ELF header: https://refspecs.linuxfoundation.org/elf/gabi4+/ch4.eheader.html
+"""
+
+from __future__ import annotations
+
+import enum
+import os
+import struct
+from typing import IO
+
+
+class ELFInvalid(ValueError):
+    pass
+
+
+class EIClass(enum.IntEnum):
+    C32 = 1
+    C64 = 2
+
+
+class EIData(enum.IntEnum):
+    Lsb = 1
+    Msb = 2
+
+
+class EMachine(enum.IntEnum):
+    I386 = 3
+    S390 = 22
+    Arm = 40
+    X8664 = 62
+    AArc64 = 183
+
+
+class ELFFile:
+    """
+    Representation of an ELF executable.
+    """
+
+    def __init__(self, f: IO[bytes]) -> None:
+        self._f = f
+
+        try:
+            ident = self._read("16B")
+        except struct.error as e:
+            raise ELFInvalid("unable to parse identification") from e
+        magic = bytes(ident[:4])
+        if magic != b"\x7fELF":
+            raise ELFInvalid(f"invalid magic: {magic!r}")
+
+        self.capacity = ident[4]  # Format for program header (bitness).
+        self.encoding = ident[5]  # Data structure encoding (endianness).
+
+        try:
+            # e_fmt: Format for program header.
+            # p_fmt: Format for section header.
+            # p_idx: Indexes to find p_type, p_offset, and p_filesz.
+            e_fmt, self._p_fmt, self._p_idx = {
+                (1, 1): ("<HHIIIIIHHH", "<IIIIIIII", (0, 1, 4)),  # 32-bit LSB.
+                (1, 2): (">HHIIIIIHHH", ">IIIIIIII", (0, 1, 4)),  # 32-bit MSB.
+                (2, 1): ("<HHIQQQIHHH", "<IIQQQQQQ", (0, 2, 5)),  # 64-bit LSB.
+                (2, 2): (">HHIQQQIHHH", ">IIQQQQQQ", (0, 2, 5)),  # 64-bit MSB.
+            }[(self.capacity, self.encoding)]
+        except KeyError as e:
+            raise ELFInvalid(
+                f"unrecognized capacity ({self.capacity}) or encoding ({self.encoding})"
+            ) from e
+
+        try:
+            (
+                _,
+                self.machine,  # Architecture type.
+                _,
+                _,
+                self._e_phoff,  # Offset of program header.
+                _,
+                self.flags,  # Processor-specific flags.
+                _,
+                self._e_phentsize,  # Size of section.
+                self._e_phnum,  # Number of sections.
+            ) = self._read(e_fmt)
+        except struct.error as e:
+            raise ELFInvalid("unable to parse machine and section information") from e
+
+    def _read(self, fmt: str) -> tuple[int, ...]:
+        return struct.unpack(fmt, self._f.read(struct.calcsize(fmt)))
+
+    @property
+    def interpreter(self) -> str | None:
+        """
+        The path recorded in the ``PT_INTERP`` section header.
+        """
+        for index in range(self._e_phnum):
+            self._f.seek(self._e_phoff + self._e_phentsize * index)
+            try:
+                data = self._read(self._p_fmt)
+            except struct.error:
+                continue
+            if data[self._p_idx[0]] != 3:  # Not PT_INTERP.
+                continue
+            self._f.seek(data[self._p_idx[1]])
+            return os.fsdecode(self._f.read(data[self._p_idx[2]])).strip("\0")
+        return None

python/Lib/site-packages/setuptools/_vendor/packaging/_manylinux.py

@@ -0,0 +1,262 @@
+from __future__ import annotations
+
+import collections
+import contextlib
+import functools
+import os
+import re
+import sys
+import warnings
+from typing import Generator, Iterator, NamedTuple, Sequence
+
+from ._elffile import EIClass, EIData, ELFFile, EMachine
+
+EF_ARM_ABIMASK = 0xFF000000
+EF_ARM_ABI_VER5 = 0x05000000
+EF_ARM_ABI_FLOAT_HARD = 0x00000400
+
+_ALLOWED_ARCHS = {
+    "x86_64",
+    "aarch64",
+    "ppc64",
+    "ppc64le",
+    "s390x",
+    "loongarch64",
+    "riscv64",
+}
+
+
+# `os.PathLike` not a generic type until Python 3.9, so sticking with `str`
+# as the type for `path` until then.
+@contextlib.contextmanager
+def _parse_elf(path: str) -> Generator[ELFFile | None, None, None]:
+    try:
+        with open(path, "rb") as f:
+            yield ELFFile(f)
+    except (OSError, TypeError, ValueError):
+        yield None
+
+
+def _is_linux_armhf(executable: str) -> bool:
+    # hard-float ABI can be detected from the ELF header of the running
+    # process
+    # https://static.docs.arm.com/ihi0044/g/aaelf32.pdf
+    with _parse_elf(executable) as f:
+        return (
+            f is not None
+            and f.capacity == EIClass.C32
+            and f.encoding == EIData.Lsb
+            and f.machine == EMachine.Arm
+            and f.flags & EF_ARM_ABIMASK == EF_ARM_ABI_VER5
+            and f.flags & EF_ARM_ABI_FLOAT_HARD == EF_ARM_ABI_FLOAT_HARD
+        )
+
+
+def _is_linux_i686(executable: str) -> bool:
+    with _parse_elf(executable) as f:
+        return (
+            f is not None
+            and f.capacity == EIClass.C32
+            and f.encoding == EIData.Lsb
+            and f.machine == EMachine.I386
+        )
+
+
+def _have_compatible_abi(executable: str, archs: Sequence[str]) -> bool:
+    if "armv7l" in archs:
+        return _is_linux_armhf(executable)
+    if "i686" in archs:
+        return _is_linux_i686(executable)
+    return any(arch in _ALLOWED_ARCHS for arch in archs)
+
+
+# If glibc ever changes its major version, we need to know what the last
+# minor version was, so we can build the complete list of all versions.
+# For now, guess what the highest minor version might be, assume it will
+# be 50 for testing. Once this actually happens, update the dictionary
+# with the actual value.
+_LAST_GLIBC_MINOR: dict[int, int] = collections.defaultdict(lambda: 50)
+
+
+class _GLibCVersion(NamedTuple):
+    major: int
+    minor: int
+
+
+def _glibc_version_string_confstr() -> str | None:
+    """
+    Primary implementation of glibc_version_string using os.confstr.
+    """
+    # os.confstr is quite a bit faster than ctypes.DLL. It's also less likely
+    # to be broken or missing. This strategy is used in the standard library
+    # platform module.
+    # https://github.com/python/cpython/blob/fcf1d003bf4f0100c/Lib/platform.py#L175-L183
+    try:
+        # Should be a string like "glibc 2.17".
+        version_string: str | None = os.confstr("CS_GNU_LIBC_VERSION")
+        assert version_string is not None
+        _, version = version_string.rsplit()
+    except (AssertionError, AttributeError, OSError, ValueError):
+        # os.confstr() or CS_GNU_LIBC_VERSION not available (or a bad value)...
+        return None
+    return version
+
+
+def _glibc_version_string_ctypes() -> str | None:
+    """
+    Fallback implementation of glibc_version_string using ctypes.
+    """
+    try:
+        import ctypes  # noqa: PLC0415
+    except ImportError:
+        return None
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    #
+    # We must also handle the special case where the executable is not a
+    # dynamically linked executable. This can occur when using musl libc,
+    # for example. In this situation, dlopen() will error, leading to an
+    # OSError. Interestingly, at least in the case of musl, there is no
+    # errno set on the OSError. The single string argument used to construct
+    # OSError comes from libc itself and is therefore not portable to
+    # hard code here. In any case, failure to call dlopen() means we
+    # can proceed, so we bail on our attempt.
+    try:
+        process_namespace = ctypes.CDLL(None)
+    except OSError:
+        return None
+
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str: str = gnu_get_libc_version()
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+def _glibc_version_string() -> str | None:
+    """Returns glibc version string, or None if not using glibc."""
+    return _glibc_version_string_confstr() or _glibc_version_string_ctypes()
+
+
+def _parse_glibc_version(version_str: str) -> _GLibCVersion:
+    """Parse glibc version.
+
+    We use a regexp instead of str.split because we want to discard any
+    random junk that might come after the minor version -- this might happen
+    in patched/forked versions of glibc (e.g. Linaro's version of glibc
+    uses version strings like "2.20-2014.11"). See gh-3588.
+    """
+    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
+    if not m:
+        warnings.warn(
+            f"Expected glibc version with 2 components major.minor, got: {version_str}",
+            RuntimeWarning,
+            stacklevel=2,
+        )
+        return _GLibCVersion(-1, -1)
+    return _GLibCVersion(int(m.group("major")), int(m.group("minor")))
+
+
+@functools.lru_cache
+def _get_glibc_version() -> _GLibCVersion:
+    version_str = _glibc_version_string()
+    if version_str is None:
+        return _GLibCVersion(-1, -1)
+    return _parse_glibc_version(version_str)
+
+
+# From PEP 513, PEP 600
+def _is_compatible(arch: str, version: _GLibCVersion) -> bool:
+    sys_glibc = _get_glibc_version()
+    if sys_glibc < version:
+        return False
+    # Check for presence of _manylinux module.
+    try:
+        import _manylinux  # noqa: PLC0415
+    except ImportError:
+        return True
+    if hasattr(_manylinux, "manylinux_compatible"):
+        result = _manylinux.manylinux_compatible(version[0], version[1], arch)
+        if result is not None:
+            return bool(result)
+        return True
+    if version == _GLibCVersion(2, 5) and hasattr(_manylinux, "manylinux1_compatible"):
+        return bool(_manylinux.manylinux1_compatible)
+    if version == _GLibCVersion(2, 12) and hasattr(
+        _manylinux, "manylinux2010_compatible"
+    ):
+        return bool(_manylinux.manylinux2010_compatible)
+    if version == _GLibCVersion(2, 17) and hasattr(
+        _manylinux, "manylinux2014_compatible"
+    ):
+        return bool(_manylinux.manylinux2014_compatible)
+    return True
+
+
+_LEGACY_MANYLINUX_MAP: dict[_GLibCVersion, str] = {
+    # CentOS 7 w/ glibc 2.17 (PEP 599)
+    _GLibCVersion(2, 17): "manylinux2014",
+    # CentOS 6 w/ glibc 2.12 (PEP 571)
+    _GLibCVersion(2, 12): "manylinux2010",
+    # CentOS 5 w/ glibc 2.5 (PEP 513)
+    _GLibCVersion(2, 5): "manylinux1",
+}
+
+
+def platform_tags(archs: Sequence[str]) -> Iterator[str]:
+    """Generate manylinux tags compatible to the current platform.
+
+    :param archs: Sequence of compatible architectures.
+        The first one shall be the closest to the actual architecture and be the part of
+        platform tag after the ``linux_`` prefix, e.g. ``x86_64``.
+        The ``linux_`` prefix is assumed as a prerequisite for the current platform to
+        be manylinux-compatible.
+
+    :returns: An iterator of compatible manylinux tags.
+    """
+    if not _have_compatible_abi(sys.executable, archs):
+        return
+    # Oldest glibc to be supported regardless of architecture is (2, 17).
+    too_old_glibc2 = _GLibCVersion(2, 16)
+    if set(archs) & {"x86_64", "i686"}:
+        # On x86/i686 also oldest glibc to be supported is (2, 5).
+        too_old_glibc2 = _GLibCVersion(2, 4)
+    current_glibc = _GLibCVersion(*_get_glibc_version())
+    glibc_max_list = [current_glibc]
+    # We can assume compatibility across glibc major versions.
+    # https://sourceware.org/bugzilla/show_bug.cgi?id=24636
+    #
+    # Build a list of maximum glibc versions so that we can
+    # output the canonical list of all glibc from current_glibc
+    # down to too_old_glibc2, including all intermediary versions.
+    for glibc_major in range(current_glibc.major - 1, 1, -1):
+        glibc_minor = _LAST_GLIBC_MINOR[glibc_major]
+        glibc_max_list.append(_GLibCVersion(glibc_major, glibc_minor))
+    for arch in archs:
+        for glibc_max in glibc_max_list:
+            if glibc_max.major == too_old_glibc2.major:
+                min_minor = too_old_glibc2.minor
+            else:
+                # For other glibc major versions oldest supported is (x, 0).
+                min_minor = -1
+            for glibc_minor in range(glibc_max.minor, min_minor, -1):
+                glibc_version = _GLibCVersion(glibc_max.major, glibc_minor)
+                if _is_compatible(arch, glibc_version):
+                    yield "manylinux_{}_{}_{}".format(*glibc_version, arch)
+
+                    # Handle the legacy manylinux1, manylinux2010, manylinux2014 tags.
+                    if legacy_tag := _LEGACY_MANYLINUX_MAP.get(glibc_version):
+                        yield f"{legacy_tag}_{arch}"

python/Lib/site-packages/setuptools/_vendor/packaging/_musllinux.py

@@ -0,0 +1,85 @@
+"""PEP 656 support.
+
+This module implements logic to detect if the currently running Python is
+linked against musl, and what musl version is used.
+"""
+
+from __future__ import annotations
+
+import functools
+import re
+import subprocess
+import sys
+from typing import Iterator, NamedTuple, Sequence
+
+from ._elffile import ELFFile
+
+
+class _MuslVersion(NamedTuple):
+    major: int
+    minor: int
+
+
+def _parse_musl_version(output: str) -> _MuslVersion | None:
+    lines = [n for n in (n.strip() for n in output.splitlines()) if n]
+    if len(lines) < 2 or lines[0][:4] != "musl":
+        return None
+    m = re.match(r"Version (\d+)\.(\d+)", lines[1])
+    if not m:
+        return None
+    return _MuslVersion(major=int(m.group(1)), minor=int(m.group(2)))
+
+
+@functools.lru_cache
+def _get_musl_version(executable: str) -> _MuslVersion | None:
+    """Detect currently-running musl runtime version.
+
+    This is done by checking the specified executable's dynamic linking
+    information, and invoking the loader to parse its output for a version
+    string. If the loader is musl, the output would be something like::
+
+        musl libc (x86_64)
+        Version 1.2.2
+        Dynamic Program Loader
+    """
+    try:
+        with open(executable, "rb") as f:
+            ld = ELFFile(f).interpreter
+    except (OSError, TypeError, ValueError):
+        return None
+    if ld is None or "musl" not in ld:
+        return None
+    proc = subprocess.run([ld], check=False, stderr=subprocess.PIPE, text=True)
+    return _parse_musl_version(proc.stderr)
+
+
+def platform_tags(archs: Sequence[str]) -> Iterator[str]:
+    """Generate musllinux tags compatible to the current platform.
+
+    :param archs: Sequence of compatible architectures.
+        The first one shall be the closest to the actual architecture and be the part of
+        platform tag after the ``linux_`` prefix, e.g. ``x86_64``.
+        The ``linux_`` prefix is assumed as a prerequisite for the current platform to
+        be musllinux-compatible.
+
+    :returns: An iterator of compatible musllinux tags.
+    """
+    sys_musl = _get_musl_version(sys.executable)
+    if sys_musl is None:  # Python not dynamically linked against musl.
+        return
+    for arch in archs:
+        for minor in range(sys_musl.minor, -1, -1):
+            yield f"musllinux_{sys_musl.major}_{minor}_{arch}"
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import sysconfig
+
+    plat = sysconfig.get_platform()
+    assert plat.startswith("linux-"), "not linux"
+
+    print("plat:", plat)
+    print("musl:", _get_musl_version(sys.executable))
+    print("tags:", end=" ")
+    for t in platform_tags(re.sub(r"[.-]", "_", plat.split("-", 1)[-1])):
+        print(t, end="\n      ")

python/Lib/site-packages/setuptools/_vendor/packaging/_parser.py

@@ -0,0 +1,365 @@
+"""Handwritten parser of dependency specifiers.
+
+The docstring for each __parse_* function contains EBNF-inspired grammar representing
+the implementation.
+"""
+
+from __future__ import annotations
+
+import ast
+from typing import List, Literal, NamedTuple, Sequence, Tuple, Union
+
+from ._tokenizer import DEFAULT_RULES, Tokenizer
+
+
+class Node:
+    __slots__ = ("value",)
+
+    def __init__(self, value: str) -> None:
+        self.value = value
+
+    def __str__(self) -> str:
+        return self.value
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__}({self.value!r})>"
+
+    def serialize(self) -> str:
+        raise NotImplementedError
+
+
+class Variable(Node):
+    __slots__ = ()
+
+    def serialize(self) -> str:
+        return str(self)
+
+
+class Value(Node):
+    __slots__ = ()
+
+    def serialize(self) -> str:
+        return f'"{self}"'
+
+
+class Op(Node):
+    __slots__ = ()
+
+    def serialize(self) -> str:
+        return str(self)
+
+
+MarkerLogical = Literal["and", "or"]
+MarkerVar = Union[Variable, Value]
+MarkerItem = Tuple[MarkerVar, Op, MarkerVar]
+MarkerAtom = Union[MarkerItem, Sequence["MarkerAtom"]]
+MarkerList = List[Union["MarkerList", MarkerAtom, MarkerLogical]]
+
+
+class ParsedRequirement(NamedTuple):
+    name: str
+    url: str
+    extras: list[str]
+    specifier: str
+    marker: MarkerList | None
+
+
+# --------------------------------------------------------------------------------------
+# Recursive descent parser for dependency specifier
+# --------------------------------------------------------------------------------------
+def parse_requirement(source: str) -> ParsedRequirement:
+    return _parse_requirement(Tokenizer(source, rules=DEFAULT_RULES))
+
+
+def _parse_requirement(tokenizer: Tokenizer) -> ParsedRequirement:
+    """
+    requirement = WS? IDENTIFIER WS? extras WS? requirement_details
+    """
+    tokenizer.consume("WS")
+
+    name_token = tokenizer.expect(
+        "IDENTIFIER", expected="package name at the start of dependency specifier"
+    )
+    name = name_token.text
+    tokenizer.consume("WS")
+
+    extras = _parse_extras(tokenizer)
+    tokenizer.consume("WS")
+
+    url, specifier, marker = _parse_requirement_details(tokenizer)
+    tokenizer.expect("END", expected="end of dependency specifier")
+
+    return ParsedRequirement(name, url, extras, specifier, marker)
+
+
+def _parse_requirement_details(
+    tokenizer: Tokenizer,
+) -> tuple[str, str, MarkerList | None]:
+    """
+    requirement_details = AT URL (WS requirement_marker?)?
+                        | specifier WS? (requirement_marker)?
+    """
+
+    specifier = ""
+    url = ""
+    marker = None
+
+    if tokenizer.check("AT"):
+        tokenizer.read()
+        tokenizer.consume("WS")
+
+        url_start = tokenizer.position
+        url = tokenizer.expect("URL", expected="URL after @").text
+        if tokenizer.check("END", peek=True):
+            return (url, specifier, marker)
+
+        tokenizer.expect("WS", expected="whitespace after URL")
+
+        # The input might end after whitespace.
+        if tokenizer.check("END", peek=True):
+            return (url, specifier, marker)
+
+        marker = _parse_requirement_marker(
+            tokenizer,
+            span_start=url_start,
+            expected="semicolon (after URL and whitespace)",
+        )
+    else:
+        specifier_start = tokenizer.position
+        specifier = _parse_specifier(tokenizer)
+        tokenizer.consume("WS")
+
+        if tokenizer.check("END", peek=True):
+            return (url, specifier, marker)
+
+        marker = _parse_requirement_marker(
+            tokenizer,
+            span_start=specifier_start,
+            expected=(
+                "comma (within version specifier), semicolon (after version specifier)"
+                if specifier
+                else "semicolon (after name with no version specifier)"
+            ),
+        )
+
+    return (url, specifier, marker)
+
+
+def _parse_requirement_marker(
+    tokenizer: Tokenizer, *, span_start: int, expected: str
+) -> MarkerList:
+    """
+    requirement_marker = SEMICOLON marker WS?
+    """
+
+    if not tokenizer.check("SEMICOLON"):
+        tokenizer.raise_syntax_error(
+            f"Expected {expected} or end",
+            span_start=span_start,
+            span_end=None,
+        )
+    tokenizer.read()
+
+    marker = _parse_marker(tokenizer)
+    tokenizer.consume("WS")
+
+    return marker
+
+
+def _parse_extras(tokenizer: Tokenizer) -> list[str]:
+    """
+    extras = (LEFT_BRACKET wsp* extras_list? wsp* RIGHT_BRACKET)?
+    """
+    if not tokenizer.check("LEFT_BRACKET", peek=True):
+        return []
+
+    with tokenizer.enclosing_tokens(
+        "LEFT_BRACKET",
+        "RIGHT_BRACKET",
+        around="extras",
+    ):
+        tokenizer.consume("WS")
+        extras = _parse_extras_list(tokenizer)
+        tokenizer.consume("WS")
+
+    return extras
+
+
+def _parse_extras_list(tokenizer: Tokenizer) -> list[str]:
+    """
+    extras_list = identifier (wsp* ',' wsp* identifier)*
+    """
+    extras: list[str] = []
+
+    if not tokenizer.check("IDENTIFIER"):
+        return extras
+
+    extras.append(tokenizer.read().text)
+
+    while True:
+        tokenizer.consume("WS")
+        if tokenizer.check("IDENTIFIER", peek=True):
+            tokenizer.raise_syntax_error("Expected comma between extra names")
+        elif not tokenizer.check("COMMA"):
+            break
+
+        tokenizer.read()
+        tokenizer.consume("WS")
+
+        extra_token = tokenizer.expect("IDENTIFIER", expected="extra name after comma")
+        extras.append(extra_token.text)
+
+    return extras
+
+
+def _parse_specifier(tokenizer: Tokenizer) -> str:
+    """
+    specifier = LEFT_PARENTHESIS WS? version_many WS? RIGHT_PARENTHESIS
+              | WS? version_many WS?
+    """
+    with tokenizer.enclosing_tokens(
+        "LEFT_PARENTHESIS",
+        "RIGHT_PARENTHESIS",
+        around="version specifier",
+    ):
+        tokenizer.consume("WS")
+        parsed_specifiers = _parse_version_many(tokenizer)
+        tokenizer.consume("WS")
+
+    return parsed_specifiers
+
+
+def _parse_version_many(tokenizer: Tokenizer) -> str:
+    """
+    version_many = (SPECIFIER (WS? COMMA WS? SPECIFIER)*)?
+    """
+    parsed_specifiers = ""
+    while tokenizer.check("SPECIFIER"):
+        span_start = tokenizer.position
+        parsed_specifiers += tokenizer.read().text
+        if tokenizer.check("VERSION_PREFIX_TRAIL", peek=True):
+            tokenizer.raise_syntax_error(
+                ".* suffix can only be used with `==` or `!=` operators",
+                span_start=span_start,
+                span_end=tokenizer.position + 1,
+            )
+        if tokenizer.check("VERSION_LOCAL_LABEL_TRAIL", peek=True):
+            tokenizer.raise_syntax_error(
+                "Local version label can only be used with `==` or `!=` operators",
+                span_start=span_start,
+                span_end=tokenizer.position,
+            )
+        tokenizer.consume("WS")
+        if not tokenizer.check("COMMA"):
+            break
+        parsed_specifiers += tokenizer.read().text
+        tokenizer.consume("WS")
+
+    return parsed_specifiers
+
+
+# --------------------------------------------------------------------------------------
+# Recursive descent parser for marker expression
+# --------------------------------------------------------------------------------------
+def parse_marker(source: str) -> MarkerList:
+    return _parse_full_marker(Tokenizer(source, rules=DEFAULT_RULES))
+
+
+def _parse_full_marker(tokenizer: Tokenizer) -> MarkerList:
+    retval = _parse_marker(tokenizer)
+    tokenizer.expect("END", expected="end of marker expression")
+    return retval
+
+
+def _parse_marker(tokenizer: Tokenizer) -> MarkerList:
+    """
+    marker = marker_atom (BOOLOP marker_atom)+
+    """
+    expression = [_parse_marker_atom(tokenizer)]
+    while tokenizer.check("BOOLOP"):
+        token = tokenizer.read()
+        expr_right = _parse_marker_atom(tokenizer)
+        expression.extend((token.text, expr_right))
+    return expression
+
+
+def _parse_marker_atom(tokenizer: Tokenizer) -> MarkerAtom:
+    """
+    marker_atom = WS? LEFT_PARENTHESIS WS? marker WS? RIGHT_PARENTHESIS WS?
+                | WS? marker_item WS?
+    """
+
+    tokenizer.consume("WS")
+    if tokenizer.check("LEFT_PARENTHESIS", peek=True):
+        with tokenizer.enclosing_tokens(
+            "LEFT_PARENTHESIS",
+            "RIGHT_PARENTHESIS",
+            around="marker expression",
+        ):
+            tokenizer.consume("WS")
+            marker: MarkerAtom = _parse_marker(tokenizer)
+            tokenizer.consume("WS")
+    else:
+        marker = _parse_marker_item(tokenizer)
+    tokenizer.consume("WS")
+    return marker
+
+
+def _parse_marker_item(tokenizer: Tokenizer) -> MarkerItem:
+    """
+    marker_item = WS? marker_var WS? marker_op WS? marker_var WS?
+    """
+    tokenizer.consume("WS")
+    marker_var_left = _parse_marker_var(tokenizer)
+    tokenizer.consume("WS")
+    marker_op = _parse_marker_op(tokenizer)
+    tokenizer.consume("WS")
+    marker_var_right = _parse_marker_var(tokenizer)
+    tokenizer.consume("WS")
+    return (marker_var_left, marker_op, marker_var_right)
+
+
+def _parse_marker_var(tokenizer: Tokenizer) -> MarkerVar:  # noqa: RET503
+    """
+    marker_var = VARIABLE | QUOTED_STRING
+    """
+    if tokenizer.check("VARIABLE"):
+        return process_env_var(tokenizer.read().text.replace(".", "_"))
+    elif tokenizer.check("QUOTED_STRING"):
+        return process_python_str(tokenizer.read().text)
+    else:
+        tokenizer.raise_syntax_error(
+            message="Expected a marker variable or quoted string"
+        )
+
+
+def process_env_var(env_var: str) -> Variable:
+    if env_var in ("platform_python_implementation", "python_implementation"):
+        return Variable("platform_python_implementation")
+    else:
+        return Variable(env_var)
+
+
+def process_python_str(python_str: str) -> Value:
+    value = ast.literal_eval(python_str)
+    return Value(str(value))
+
+
+def _parse_marker_op(tokenizer: Tokenizer) -> Op:
+    """
+    marker_op = IN | NOT IN | OP
+    """
+    if tokenizer.check("IN"):
+        tokenizer.read()
+        return Op("in")
+    elif tokenizer.check("NOT"):
+        tokenizer.read()
+        tokenizer.expect("WS", expected="whitespace after 'not'")
+        tokenizer.expect("IN", expected="'in' after 'not'")
+        return Op("not in")
+    elif tokenizer.check("OP"):
+        return Op(tokenizer.read().text)
+    else:
+        return tokenizer.raise_syntax_error(
+            "Expected marker operator, one of <=, <, !=, ==, >=, >, ~=, ===, in, not in"
+        )

python/Lib/site-packages/setuptools/_vendor/packaging/_structures.py

@@ -0,0 +1,69 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+import typing
+
+
+@typing.final
+class InfinityType:
+    __slots__ = ()
+
+    def __repr__(self) -> str:
+        return "Infinity"
+
+    def __hash__(self) -> int:
+        return hash(repr(self))
+
+    def __lt__(self, other: object) -> bool:
+        return False
+
+    def __le__(self, other: object) -> bool:
+        return False
+
+    def __eq__(self, other: object) -> bool:
+        return isinstance(other, self.__class__)
+
+    def __gt__(self, other: object) -> bool:
+        return True
+
+    def __ge__(self, other: object) -> bool:
+        return True
+
+    def __neg__(self: object) -> "NegativeInfinityType":
+        return NegativeInfinity
+
+
+Infinity = InfinityType()
+
+
+@typing.final
+class NegativeInfinityType:
+    __slots__ = ()
+
+    def __repr__(self) -> str:
+        return "-Infinity"
+
+    def __hash__(self) -> int:
+        return hash(repr(self))
+
+    def __lt__(self, other: object) -> bool:
+        return True
+
+    def __le__(self, other: object) -> bool:
+        return True
+
+    def __eq__(self, other: object) -> bool:
+        return isinstance(other, self.__class__)
+
+    def __gt__(self, other: object) -> bool:
+        return False
+
+    def __ge__(self, other: object) -> bool:
+        return False
+
+    def __neg__(self: object) -> InfinityType:
+        return Infinity
+
+
+NegativeInfinity = NegativeInfinityType()

python/Lib/site-packages/setuptools/_vendor/packaging/_tokenizer.py

@@ -0,0 +1,193 @@
+from __future__ import annotations
+
+import contextlib
+import re
+from dataclasses import dataclass
+from typing import Generator, Mapping, NoReturn
+
+from .specifiers import Specifier
+
+
+@dataclass
+class Token:
+    name: str
+    text: str
+    position: int
+
+
+class ParserSyntaxError(Exception):
+    """The provided source text could not be parsed correctly."""
+
+    def __init__(
+        self,
+        message: str,
+        *,
+        source: str,
+        span: tuple[int, int],
+    ) -> None:
+        self.span = span
+        self.message = message
+        self.source = source
+
+        super().__init__()
+
+    def __str__(self) -> str:
+        marker = " " * self.span[0] + "~" * (self.span[1] - self.span[0]) + "^"
+        return f"{self.message}\n    {self.source}\n    {marker}"
+
+
+DEFAULT_RULES: dict[str, re.Pattern[str]] = {
+    "LEFT_PARENTHESIS": re.compile(r"\("),
+    "RIGHT_PARENTHESIS": re.compile(r"\)"),
+    "LEFT_BRACKET": re.compile(r"\["),
+    "RIGHT_BRACKET": re.compile(r"\]"),
+    "SEMICOLON": re.compile(r";"),
+    "COMMA": re.compile(r","),
+    "QUOTED_STRING": re.compile(
+        r"""
+            (
+                ('[^']*')
+                |
+                ("[^"]*")
+            )
+        """,
+        re.VERBOSE,
+    ),
+    "OP": re.compile(r"(===|==|~=|!=|<=|>=|<|>)"),
+    "BOOLOP": re.compile(r"\b(or|and)\b"),
+    "IN": re.compile(r"\bin\b"),
+    "NOT": re.compile(r"\bnot\b"),
+    "VARIABLE": re.compile(
+        r"""
+            \b(
+                python_version
+                |python_full_version
+                |os[._]name
+                |sys[._]platform
+                |platform_(release|system)
+                |platform[._](version|machine|python_implementation)
+                |python_implementation
+                |implementation_(name|version)
+                |extras?
+                |dependency_groups
+            )\b
+        """,
+        re.VERBOSE,
+    ),
+    "SPECIFIER": re.compile(
+        Specifier._operator_regex_str + Specifier._version_regex_str,
+        re.VERBOSE | re.IGNORECASE,
+    ),
+    "AT": re.compile(r"\@"),
+    "URL": re.compile(r"[^ \t]+"),
+    "IDENTIFIER": re.compile(r"\b[a-zA-Z0-9][a-zA-Z0-9._-]*\b"),
+    "VERSION_PREFIX_TRAIL": re.compile(r"\.\*"),
+    "VERSION_LOCAL_LABEL_TRAIL": re.compile(r"\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*"),
+    "WS": re.compile(r"[ \t]+"),
+    "END": re.compile(r"$"),
+}
+
+
+class Tokenizer:
+    """Context-sensitive token parsing.
+
+    Provides methods to examine the input stream to check whether the next token
+    matches.
+    """
+
+    def __init__(
+        self,
+        source: str,
+        *,
+        rules: Mapping[str, re.Pattern[str]],
+    ) -> None:
+        self.source = source
+        self.rules = rules
+        self.next_token: Token | None = None
+        self.position = 0
+
+    def consume(self, name: str) -> None:
+        """Move beyond provided token name, if at current position."""
+        if self.check(name):
+            self.read()
+
+    def check(self, name: str, *, peek: bool = False) -> bool:
+        """Check whether the next token has the provided name.
+
+        By default, if the check succeeds, the token *must* be read before
+        another check. If `peek` is set to `True`, the token is not loaded and
+        would need to be checked again.
+        """
+        assert self.next_token is None, (
+            f"Cannot check for {name!r}, already have {self.next_token!r}"
+        )
+        assert name in self.rules, f"Unknown token name: {name!r}"
+
+        expression = self.rules[name]
+
+        match = expression.match(self.source, self.position)
+        if match is None:
+            return False
+        if not peek:
+            self.next_token = Token(name, match[0], self.position)
+        return True
+
+    def expect(self, name: str, *, expected: str) -> Token:
+        """Expect a certain token name next, failing with a syntax error otherwise.
+
+        The token is *not* read.
+        """
+        if not self.check(name):
+            raise self.raise_syntax_error(f"Expected {expected}")
+        return self.read()
+
+    def read(self) -> Token:
+        """Consume the next token and return it."""
+        token = self.next_token
+        assert token is not None
+
+        self.position += len(token.text)
+        self.next_token = None
+
+        return token
+
+    def raise_syntax_error(
+        self,
+        message: str,
+        *,
+        span_start: int | None = None,
+        span_end: int | None = None,
+    ) -> NoReturn:
+        """Raise ParserSyntaxError at the given position."""
+        span = (
+            self.position if span_start is None else span_start,
+            self.position if span_end is None else span_end,
+        )
+        raise ParserSyntaxError(
+            message,
+            source=self.source,
+            span=span,
+        )
+
+    @contextlib.contextmanager
+    def enclosing_tokens(
+        self, open_token: str, close_token: str, *, around: str
+    ) -> Generator[None, None, None]:
+        if self.check(open_token):
+            open_position = self.position
+            self.read()
+        else:
+            open_position = None
+
+        yield
+
+        if open_position is None:
+            return
+
+        if not self.check(close_token):
+            self.raise_syntax_error(
+                f"Expected matching {close_token} for {open_token}, after {around}",
+                span_start=open_position,
+            )
+
+        self.read()

python/Lib/site-packages/setuptools/_vendor/packaging/markers.py

@@ -0,0 +1,388 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import operator
+import os
+import platform
+import sys
+from typing import AbstractSet, Callable, Literal, Mapping, TypedDict, Union, cast
+
+from ._parser import MarkerAtom, MarkerList, Op, Value, Variable
+from ._parser import parse_marker as _parse_marker
+from ._tokenizer import ParserSyntaxError
+from .specifiers import InvalidSpecifier, Specifier
+from .utils import canonicalize_name
+
+__all__ = [
+    "Environment",
+    "EvaluateContext",
+    "InvalidMarker",
+    "Marker",
+    "UndefinedComparison",
+    "UndefinedEnvironmentName",
+    "default_environment",
+]
+
+Operator = Callable[[str, Union[str, AbstractSet[str]]], bool]
+EvaluateContext = Literal["metadata", "lock_file", "requirement"]
+MARKERS_ALLOWING_SET = {"extras", "dependency_groups"}
+MARKERS_REQUIRING_VERSION = {
+    "implementation_version",
+    "platform_release",
+    "python_full_version",
+    "python_version",
+}
+
+
+class InvalidMarker(ValueError):
+    """
+    An invalid marker was found, users should refer to PEP 508.
+    """
+
+
+class UndefinedComparison(ValueError):
+    """
+    An invalid operation was attempted on a value that doesn't support it.
+    """
+
+
+class UndefinedEnvironmentName(ValueError):
+    """
+    A name was attempted to be used that does not exist inside of the
+    environment.
+    """
+
+
+class Environment(TypedDict):
+    implementation_name: str
+    """The implementation's identifier, e.g. ``'cpython'``."""
+
+    implementation_version: str
+    """
+    The implementation's version, e.g. ``'3.13.0a2'`` for CPython 3.13.0a2, or
+    ``'7.3.13'`` for PyPy3.10 v7.3.13.
+    """
+
+    os_name: str
+    """
+    The value of :py:data:`os.name`. The name of the operating system dependent module
+    imported, e.g. ``'posix'``.
+    """
+
+    platform_machine: str
+    """
+    Returns the machine type, e.g. ``'i386'``.
+
+    An empty string if the value cannot be determined.
+    """
+
+    platform_release: str
+    """
+    The system's release, e.g. ``'2.2.0'`` or ``'NT'``.
+
+    An empty string if the value cannot be determined.
+    """
+
+    platform_system: str
+    """
+    The system/OS name, e.g. ``'Linux'``, ``'Windows'`` or ``'Java'``.
+
+    An empty string if the value cannot be determined.
+    """
+
+    platform_version: str
+    """
+    The system's release version, e.g. ``'#3 on degas'``.
+
+    An empty string if the value cannot be determined.
+    """
+
+    python_full_version: str
+    """
+    The Python version as string ``'major.minor.patchlevel'``.
+
+    Note that unlike the Python :py:data:`sys.version`, this value will always include
+    the patchlevel (it defaults to 0).
+    """
+
+    platform_python_implementation: str
+    """
+    A string identifying the Python implementation, e.g. ``'CPython'``.
+    """
+
+    python_version: str
+    """The Python version as string ``'major.minor'``."""
+
+    sys_platform: str
+    """
+    This string contains a platform identifier that can be used to append
+    platform-specific components to :py:data:`sys.path`, for instance.
+
+    For Unix systems, except on Linux and AIX, this is the lowercased OS name as
+    returned by ``uname -s`` with the first part of the version as returned by
+    ``uname -r`` appended, e.g. ``'sunos5'`` or ``'freebsd8'``, at the time when Python
+    was built.
+    """
+
+
+def _normalize_extras(
+    result: MarkerList | MarkerAtom | str,
+) -> MarkerList | MarkerAtom | str:
+    if not isinstance(result, tuple):
+        return result
+
+    lhs, op, rhs = result
+    if isinstance(lhs, Variable) and lhs.value == "extra":
+        normalized_extra = canonicalize_name(rhs.value)
+        rhs = Value(normalized_extra)
+    elif isinstance(rhs, Variable) and rhs.value == "extra":
+        normalized_extra = canonicalize_name(lhs.value)
+        lhs = Value(normalized_extra)
+    return lhs, op, rhs
+
+
+def _normalize_extra_values(results: MarkerList) -> MarkerList:
+    """
+    Normalize extra values.
+    """
+
+    return [_normalize_extras(r) for r in results]
+
+
+def _format_marker(
+    marker: list[str] | MarkerAtom | str, first: bool | None = True
+) -> str:
+    assert isinstance(marker, (list, tuple, str))
+
+    # Sometimes we have a structure like [[...]] which is a single item list
+    # where the single item is itself it's own list. In that case we want skip
+    # the rest of this function so that we don't get extraneous () on the
+    # outside.
+    if (
+        isinstance(marker, list)
+        and len(marker) == 1
+        and isinstance(marker[0], (list, tuple))
+    ):
+        return _format_marker(marker[0])
+
+    if isinstance(marker, list):
+        inner = (_format_marker(m, first=False) for m in marker)
+        if first:
+            return " ".join(inner)
+        else:
+            return "(" + " ".join(inner) + ")"
+    elif isinstance(marker, tuple):
+        return " ".join([m.serialize() for m in marker])
+    else:
+        return marker
+
+
+_operators: dict[str, Operator] = {
+    "in": lambda lhs, rhs: lhs in rhs,
+    "not in": lambda lhs, rhs: lhs not in rhs,
+    "<": lambda _lhs, _rhs: False,
+    "<=": operator.eq,
+    "==": operator.eq,
+    "!=": operator.ne,
+    ">=": operator.eq,
+    ">": lambda _lhs, _rhs: False,
+}
+
+
+def _eval_op(lhs: str, op: Op, rhs: str | AbstractSet[str], *, key: str) -> bool:
+    op_str = op.serialize()
+    if key in MARKERS_REQUIRING_VERSION:
+        try:
+            spec = Specifier(f"{op_str}{rhs}")
+        except InvalidSpecifier:
+            pass
+        else:
+            return spec.contains(lhs, prereleases=True)
+
+    oper: Operator | None = _operators.get(op_str)
+    if oper is None:
+        raise UndefinedComparison(f"Undefined {op!r} on {lhs!r} and {rhs!r}.")
+
+    return oper(lhs, rhs)
+
+
+def _normalize(
+    lhs: str, rhs: str | AbstractSet[str], key: str
+) -> tuple[str, str | AbstractSet[str]]:
+    # PEP 685 - Comparison of extra names for optional distribution dependencies
+    # https://peps.python.org/pep-0685/
+    # > When comparing extra names, tools MUST normalize the names being
+    # > compared using the semantics outlined in PEP 503 for names
+    if key == "extra":
+        assert isinstance(rhs, str), "extra value must be a string"
+        # Both sides are normalized at this point already
+        return (lhs, rhs)
+    if key in MARKERS_ALLOWING_SET:
+        if isinstance(rhs, str):  # pragma: no cover
+            return (canonicalize_name(lhs), canonicalize_name(rhs))
+        else:
+            return (canonicalize_name(lhs), {canonicalize_name(v) for v in rhs})
+
+    # other environment markers don't have such standards
+    return lhs, rhs
+
+
+def _evaluate_markers(
+    markers: MarkerList, environment: dict[str, str | AbstractSet[str]]
+) -> bool:
+    groups: list[list[bool]] = [[]]
+
+    for marker in markers:
+        if isinstance(marker, list):
+            groups[-1].append(_evaluate_markers(marker, environment))
+        elif isinstance(marker, tuple):
+            lhs, op, rhs = marker
+
+            if isinstance(lhs, Variable):
+                environment_key = lhs.value
+                lhs_value = environment[environment_key]
+                rhs_value = rhs.value
+            else:
+                lhs_value = lhs.value
+                environment_key = rhs.value
+                rhs_value = environment[environment_key]
+
+            assert isinstance(lhs_value, str), "lhs must be a string"
+            lhs_value, rhs_value = _normalize(lhs_value, rhs_value, key=environment_key)
+            groups[-1].append(_eval_op(lhs_value, op, rhs_value, key=environment_key))
+        elif marker == "or":
+            groups.append([])
+        elif marker == "and":
+            pass
+        else:  # pragma: nocover
+            raise TypeError(f"Unexpected marker {marker!r}")
+
+    return any(all(item) for item in groups)
+
+
+def format_full_version(info: sys._version_info) -> str:
+    version = f"{info.major}.{info.minor}.{info.micro}"
+    kind = info.releaselevel
+    if kind != "final":
+        version += kind[0] + str(info.serial)
+    return version
+
+
+def default_environment() -> Environment:
+    iver = format_full_version(sys.implementation.version)
+    implementation_name = sys.implementation.name
+    return {
+        "implementation_name": implementation_name,
+        "implementation_version": iver,
+        "os_name": os.name,
+        "platform_machine": platform.machine(),
+        "platform_release": platform.release(),
+        "platform_system": platform.system(),
+        "platform_version": platform.version(),
+        "python_full_version": platform.python_version(),
+        "platform_python_implementation": platform.python_implementation(),
+        "python_version": ".".join(platform.python_version_tuple()[:2]),
+        "sys_platform": sys.platform,
+    }
+
+
+class Marker:
+    def __init__(self, marker: str) -> None:
+        # Note: We create a Marker object without calling this constructor in
+        #       packaging.requirements.Requirement. If any additional logic is
+        #       added here, make sure to mirror/adapt Requirement.
+
+        # If this fails and throws an error, the repr still expects _markers to
+        # be defined.
+        self._markers: MarkerList = []
+
+        try:
+            self._markers = _normalize_extra_values(_parse_marker(marker))
+            # The attribute `_markers` can be described in terms of a recursive type:
+            # MarkerList = List[Union[Tuple[Node, ...], str, MarkerList]]
+            #
+            # For example, the following expression:
+            # python_version > "3.6" or (python_version == "3.6" and os_name == "unix")
+            #
+            # is parsed into:
+            # [
+            #     (<Variable('python_version')>, <Op('>')>, <Value('3.6')>),
+            #     'and',
+            #     [
+            #         (<Variable('python_version')>, <Op('==')>, <Value('3.6')>),
+            #         'or',
+            #         (<Variable('os_name')>, <Op('==')>, <Value('unix')>)
+            #     ]
+            # ]
+        except ParserSyntaxError as e:
+            raise InvalidMarker(str(e)) from e
+
+    def __str__(self) -> str:
+        return _format_marker(self._markers)
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__}('{self}')>"
+
+    def __hash__(self) -> int:
+        return hash(str(self))
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Marker):
+            return NotImplemented
+
+        return str(self) == str(other)
+
+    def evaluate(
+        self,
+        environment: Mapping[str, str | AbstractSet[str]] | None = None,
+        context: EvaluateContext = "metadata",
+    ) -> bool:
+        """Evaluate a marker.
+
+        Return the boolean from evaluating the given marker against the
+        environment. environment is an optional argument to override all or
+        part of the determined environment. The *context* parameter specifies what
+        context the markers are being evaluated for, which influences what markers
+        are considered valid. Acceptable values are "metadata" (for core metadata;
+        default), "lock_file", and "requirement" (i.e. all other situations).
+
+        The environment is determined from the current Python process.
+        """
+        current_environment = cast(
+            "dict[str, str | AbstractSet[str]]", default_environment()
+        )
+        if context == "lock_file":
+            current_environment.update(
+                extras=frozenset(), dependency_groups=frozenset()
+            )
+        elif context == "metadata":
+            current_environment["extra"] = ""
+
+        if environment is not None:
+            current_environment.update(environment)
+            if "extra" in current_environment:
+                # The API used to allow setting extra to None. We need to handle
+                # this case for backwards compatibility. Also skip running
+                # normalize name if extra is empty.
+                extra = cast("str | None", current_environment["extra"])
+                current_environment["extra"] = canonicalize_name(extra) if extra else ""
+
+        return _evaluate_markers(
+            self._markers, _repair_python_full_version(current_environment)
+        )
+
+
+def _repair_python_full_version(
+    env: dict[str, str | AbstractSet[str]],
+) -> dict[str, str | AbstractSet[str]]:
+    """
+    Work around platform.python_version() returning something that is not PEP 440
+    compliant for non-tagged Python builds.
+    """
+    python_full_version = cast("str", env["python_full_version"])
+    if python_full_version.endswith("+"):
+        env["python_full_version"] = f"{python_full_version}local"
+    return env

python/Lib/site-packages/setuptools/_vendor/packaging/metadata.py

@@ -0,0 +1,978 @@
+from __future__ import annotations
+
+import email.feedparser
+import email.header
+import email.message
+import email.parser
+import email.policy
+import keyword
+import pathlib
+import sys
+import typing
+from typing import (
+    Any,
+    Callable,
+    Generic,
+    Literal,
+    TypedDict,
+    cast,
+)
+
+from . import licenses, requirements, specifiers, utils
+from . import version as version_module
+
+if typing.TYPE_CHECKING:
+    from .licenses import NormalizedLicenseExpression
+
+T = typing.TypeVar("T")
+
+
+if sys.version_info >= (3, 11):  # pragma: no cover
+    ExceptionGroup = ExceptionGroup  # noqa: F821
+else:  # pragma: no cover
+
+    class ExceptionGroup(Exception):
+        """A minimal implementation of :external:exc:`ExceptionGroup` from Python 3.11.
+
+        If :external:exc:`ExceptionGroup` is already defined by Python itself,
+        that version is used instead.
+        """
+
+        message: str
+        exceptions: list[Exception]
+
+        def __init__(self, message: str, exceptions: list[Exception]) -> None:
+            self.message = message
+            self.exceptions = exceptions
+
+        def __repr__(self) -> str:
+            return f"{self.__class__.__name__}({self.message!r}, {self.exceptions!r})"
+
+
+class InvalidMetadata(ValueError):
+    """A metadata field contains invalid data."""
+
+    field: str
+    """The name of the field that contains invalid data."""
+
+    def __init__(self, field: str, message: str) -> None:
+        self.field = field
+        super().__init__(message)
+
+
+# The RawMetadata class attempts to make as few assumptions about the underlying
+# serialization formats as possible. The idea is that as long as a serialization
+# formats offer some very basic primitives in *some* way then we can support
+# serializing to and from that format.
+class RawMetadata(TypedDict, total=False):
+    """A dictionary of raw core metadata.
+
+    Each field in core metadata maps to a key of this dictionary (when data is
+    provided). The key is lower-case and underscores are used instead of dashes
+    compared to the equivalent core metadata field. Any core metadata field that
+    can be specified multiple times or can hold multiple values in a single
+    field have a key with a plural name. See :class:`Metadata` whose attributes
+    match the keys of this dictionary.
+
+    Core metadata fields that can be specified multiple times are stored as a
+    list or dict depending on which is appropriate for the field. Any fields
+    which hold multiple values in a single field are stored as a list.
+
+    """
+
+    # Metadata 1.0 - PEP 241
+    metadata_version: str
+    name: str
+    version: str
+    platforms: list[str]
+    summary: str
+    description: str
+    keywords: list[str]
+    home_page: str
+    author: str
+    author_email: str
+    license: str
+
+    # Metadata 1.1 - PEP 314
+    supported_platforms: list[str]
+    download_url: str
+    classifiers: list[str]
+    requires: list[str]
+    provides: list[str]
+    obsoletes: list[str]
+
+    # Metadata 1.2 - PEP 345
+    maintainer: str
+    maintainer_email: str
+    requires_dist: list[str]
+    provides_dist: list[str]
+    obsoletes_dist: list[str]
+    requires_python: str
+    requires_external: list[str]
+    project_urls: dict[str, str]
+
+    # Metadata 2.0
+    # PEP 426 attempted to completely revamp the metadata format
+    # but got stuck without ever being able to build consensus on
+    # it and ultimately ended up withdrawn.
+    #
+    # However, a number of tools had started emitting METADATA with
+    # `2.0` Metadata-Version, so for historical reasons, this version
+    # was skipped.
+
+    # Metadata 2.1 - PEP 566
+    description_content_type: str
+    provides_extra: list[str]
+
+    # Metadata 2.2 - PEP 643
+    dynamic: list[str]
+
+    # Metadata 2.3 - PEP 685
+    # No new fields were added in PEP 685, just some edge case were
+    # tightened up to provide better interoperability.
+
+    # Metadata 2.4 - PEP 639
+    license_expression: str
+    license_files: list[str]
+
+    # Metadata 2.5 - PEP 794
+    import_names: list[str]
+    import_namespaces: list[str]
+
+
+# 'keywords' is special as it's a string in the core metadata spec, but we
+# represent it as a list.
+_STRING_FIELDS = {
+    "author",
+    "author_email",
+    "description",
+    "description_content_type",
+    "download_url",
+    "home_page",
+    "license",
+    "license_expression",
+    "maintainer",
+    "maintainer_email",
+    "metadata_version",
+    "name",
+    "requires_python",
+    "summary",
+    "version",
+}
+
+_LIST_FIELDS = {
+    "classifiers",
+    "dynamic",
+    "license_files",
+    "obsoletes",
+    "obsoletes_dist",
+    "platforms",
+    "provides",
+    "provides_dist",
+    "provides_extra",
+    "requires",
+    "requires_dist",
+    "requires_external",
+    "supported_platforms",
+    "import_names",
+    "import_namespaces",
+}
+
+_DICT_FIELDS = {
+    "project_urls",
+}
+
+
+def _parse_keywords(data: str) -> list[str]:
+    """Split a string of comma-separated keywords into a list of keywords."""
+    return [k.strip() for k in data.split(",")]
+
+
+def _parse_project_urls(data: list[str]) -> dict[str, str]:
+    """Parse a list of label/URL string pairings separated by a comma."""
+    urls = {}
+    for pair in data:
+        # Our logic is slightly tricky here as we want to try and do
+        # *something* reasonable with malformed data.
+        #
+        # The main thing that we have to worry about, is data that does
+        # not have a ',' at all to split the label from the Value. There
+        # isn't a singular right answer here, and we will fail validation
+        # later on (if the caller is validating) so it doesn't *really*
+        # matter, but since the missing value has to be an empty str
+        # and our return value is dict[str, str], if we let the key
+        # be the missing value, then they'd have multiple '' values that
+        # overwrite each other in a accumulating dict.
+        #
+        # The other potential issue is that it's possible to have the
+        # same label multiple times in the metadata, with no solid "right"
+        # answer with what to do in that case. As such, we'll do the only
+        # thing we can, which is treat the field as unparsable and add it
+        # to our list of unparsed fields.
+        #
+        # TODO: The spec doesn't say anything about if the keys should be
+        #       considered case sensitive or not... logically they should
+        #       be case-preserving and case-insensitive, but doing that
+        #       would open up more cases where we might have duplicate
+        #       entries.
+        label, _, url = (s.strip() for s in pair.partition(","))
+
+        if label in urls:
+            # The label already exists in our set of urls, so this field
+            # is unparsable, and we can just add the whole thing to our
+            # unparsable data and stop processing it.
+            raise KeyError("duplicate labels in project urls")
+        urls[label] = url
+
+    return urls
+
+
+def _get_payload(msg: email.message.Message, source: bytes | str) -> str:
+    """Get the body of the message."""
+    # If our source is a str, then our caller has managed encodings for us,
+    # and we don't need to deal with it.
+    if isinstance(source, str):
+        payload = msg.get_payload()
+        assert isinstance(payload, str)
+        return payload
+    # If our source is a bytes, then we're managing the encoding and we need
+    # to deal with it.
+    else:
+        bpayload = msg.get_payload(decode=True)
+        assert isinstance(bpayload, bytes)
+        try:
+            return bpayload.decode("utf8", "strict")
+        except UnicodeDecodeError as exc:
+            raise ValueError("payload in an invalid encoding") from exc
+
+
+# The various parse_FORMAT functions here are intended to be as lenient as
+# possible in their parsing, while still returning a correctly typed
+# RawMetadata.
+#
+# To aid in this, we also generally want to do as little touching of the
+# data as possible, except where there are possibly some historic holdovers
+# that make valid data awkward to work with.
+#
+# While this is a lower level, intermediate format than our ``Metadata``
+# class, some light touch ups can make a massive difference in usability.
+
+# Map METADATA fields to RawMetadata.
+_EMAIL_TO_RAW_MAPPING = {
+    "author": "author",
+    "author-email": "author_email",
+    "classifier": "classifiers",
+    "description": "description",
+    "description-content-type": "description_content_type",
+    "download-url": "download_url",
+    "dynamic": "dynamic",
+    "home-page": "home_page",
+    "import-name": "import_names",
+    "import-namespace": "import_namespaces",
+    "keywords": "keywords",
+    "license": "license",
+    "license-expression": "license_expression",
+    "license-file": "license_files",
+    "maintainer": "maintainer",
+    "maintainer-email": "maintainer_email",
+    "metadata-version": "metadata_version",
+    "name": "name",
+    "obsoletes": "obsoletes",
+    "obsoletes-dist": "obsoletes_dist",
+    "platform": "platforms",
+    "project-url": "project_urls",
+    "provides": "provides",
+    "provides-dist": "provides_dist",
+    "provides-extra": "provides_extra",
+    "requires": "requires",
+    "requires-dist": "requires_dist",
+    "requires-external": "requires_external",
+    "requires-python": "requires_python",
+    "summary": "summary",
+    "supported-platform": "supported_platforms",
+    "version": "version",
+}
+_RAW_TO_EMAIL_MAPPING = {raw: email for email, raw in _EMAIL_TO_RAW_MAPPING.items()}
+
+
+# This class is for writing RFC822 messages
+class RFC822Policy(email.policy.EmailPolicy):
+    """
+    This is :class:`email.policy.EmailPolicy`, but with a simple ``header_store_parse``
+    implementation that handles multi-line values, and some nice defaults.
+    """
+
+    utf8 = True
+    mangle_from_ = False
+    max_line_length = 0
+
+    def header_store_parse(self, name: str, value: str) -> tuple[str, str]:
+        size = len(name) + 2
+        value = value.replace("\n", "\n" + " " * size)
+        return (name, value)
+
+
+# This class is for writing RFC822 messages
+class RFC822Message(email.message.EmailMessage):
+    """
+    This is :class:`email.message.EmailMessage` with two small changes: it defaults to
+    our `RFC822Policy`, and it correctly writes unicode when being called
+    with `bytes()`.
+    """
+
+    def __init__(self) -> None:
+        super().__init__(policy=RFC822Policy())
+
+    def as_bytes(
+        self, unixfrom: bool = False, policy: email.policy.Policy | None = None
+    ) -> bytes:
+        """
+        Return the bytes representation of the message.
+
+        This handles unicode encoding.
+        """
+        return self.as_string(unixfrom, policy=policy).encode("utf-8")
+
+
+def parse_email(data: bytes | str) -> tuple[RawMetadata, dict[str, list[str]]]:
+    """Parse a distribution's metadata stored as email headers (e.g. from ``METADATA``).
+
+    This function returns a two-item tuple of dicts. The first dict is of
+    recognized fields from the core metadata specification. Fields that can be
+    parsed and translated into Python's built-in types are converted
+    appropriately. All other fields are left as-is. Fields that are allowed to
+    appear multiple times are stored as lists.
+
+    The second dict contains all other fields from the metadata. This includes
+    any unrecognized fields. It also includes any fields which are expected to
+    be parsed into a built-in type but were not formatted appropriately. Finally,
+    any fields that are expected to appear only once but are repeated are
+    included in this dict.
+
+    """
+    raw: dict[str, str | list[str] | dict[str, str]] = {}
+    unparsed: dict[str, list[str]] = {}
+
+    if isinstance(data, str):
+        parsed = email.parser.Parser(policy=email.policy.compat32).parsestr(data)
+    else:
+        parsed = email.parser.BytesParser(policy=email.policy.compat32).parsebytes(data)
+
+    # We have to wrap parsed.keys() in a set, because in the case of multiple
+    # values for a key (a list), the key will appear multiple times in the
+    # list of keys, but we're avoiding that by using get_all().
+    for name_with_case in frozenset(parsed.keys()):
+        # Header names in RFC are case insensitive, so we'll normalize to all
+        # lower case to make comparisons easier.
+        name = name_with_case.lower()
+
+        # We use get_all() here, even for fields that aren't multiple use,
+        # because otherwise someone could have e.g. two Name fields, and we
+        # would just silently ignore it rather than doing something about it.
+        headers = parsed.get_all(name) or []
+
+        # The way the email module works when parsing bytes is that it
+        # unconditionally decodes the bytes as ascii using the surrogateescape
+        # handler. When you pull that data back out (such as with get_all() ),
+        # it looks to see if the str has any surrogate escapes, and if it does
+        # it wraps it in a Header object instead of returning the string.
+        #
+        # As such, we'll look for those Header objects, and fix up the encoding.
+        value = []
+        # Flag if we have run into any issues processing the headers, thus
+        # signalling that the data belongs in 'unparsed'.
+        valid_encoding = True
+        for h in headers:
+            # It's unclear if this can return more types than just a Header or
+            # a str, so we'll just assert here to make sure.
+            assert isinstance(h, (email.header.Header, str))
+
+            # If it's a header object, we need to do our little dance to get
+            # the real data out of it. In cases where there is invalid data
+            # we're going to end up with mojibake, but there's no obvious, good
+            # way around that without reimplementing parts of the Header object
+            # ourselves.
+            #
+            # That should be fine since, if mojibacked happens, this key is
+            # going into the unparsed dict anyways.
+            if isinstance(h, email.header.Header):
+                # The Header object stores it's data as chunks, and each chunk
+                # can be independently encoded, so we'll need to check each
+                # of them.
+                chunks: list[tuple[bytes, str | None]] = []
+                for binary, _encoding in email.header.decode_header(h):
+                    try:
+                        binary.decode("utf8", "strict")
+                    except UnicodeDecodeError:
+                        # Enable mojibake.
+                        encoding = "latin1"
+                        valid_encoding = False
+                    else:
+                        encoding = "utf8"
+                    chunks.append((binary, encoding))
+
+                # Turn our chunks back into a Header object, then let that
+                # Header object do the right thing to turn them into a
+                # string for us.
+                value.append(str(email.header.make_header(chunks)))
+            # This is already a string, so just add it.
+            else:
+                value.append(h)
+
+        # We've processed all of our values to get them into a list of str,
+        # but we may have mojibake data, in which case this is an unparsed
+        # field.
+        if not valid_encoding:
+            unparsed[name] = value
+            continue
+
+        raw_name = _EMAIL_TO_RAW_MAPPING.get(name)
+        if raw_name is None:
+            # This is a bit of a weird situation, we've encountered a key that
+            # we don't know what it means, so we don't know whether it's meant
+            # to be a list or not.
+            #
+            # Since we can't really tell one way or another, we'll just leave it
+            # as a list, even though it may be a single item list, because that's
+            # what makes the most sense for email headers.
+            unparsed[name] = value
+            continue
+
+        # If this is one of our string fields, then we'll check to see if our
+        # value is a list of a single item. If it is then we'll assume that
+        # it was emitted as a single string, and unwrap the str from inside
+        # the list.
+        #
+        # If it's any other kind of data, then we haven't the faintest clue
+        # what we should parse it as, and we have to just add it to our list
+        # of unparsed stuff.
+        if raw_name in _STRING_FIELDS and len(value) == 1:
+            raw[raw_name] = value[0]
+        # If this is import_names, we need to special case the empty field
+        # case, which converts to an empty list instead of None. We can't let
+        # the empty case slip through, as it will fail validation.
+        elif raw_name == "import_names" and value == [""]:
+            raw[raw_name] = []
+        # If this is one of our list of string fields, then we can just assign
+        # the value, since email *only* has strings, and our get_all() call
+        # above ensures that this is a list.
+        elif raw_name in _LIST_FIELDS:
+            raw[raw_name] = value
+        # Special Case: Keywords
+        # The keywords field is implemented in the metadata spec as a str,
+        # but it conceptually is a list of strings, and is serialized using
+        # ", ".join(keywords), so we'll do some light data massaging to turn
+        # this into what it logically is.
+        elif raw_name == "keywords" and len(value) == 1:
+            raw[raw_name] = _parse_keywords(value[0])
+        # Special Case: Project-URL
+        # The project urls is implemented in the metadata spec as a list of
+        # specially-formatted strings that represent a key and a value, which
+        # is fundamentally a mapping, however the email format doesn't support
+        # mappings in a sane way, so it was crammed into a list of strings
+        # instead.
+        #
+        # We will do a little light data massaging to turn this into a map as
+        # it logically should be.
+        elif raw_name == "project_urls":
+            try:
+                raw[raw_name] = _parse_project_urls(value)
+            except KeyError:
+                unparsed[name] = value
+        # Nothing that we've done has managed to parse this, so it'll just
+        # throw it in our unparsable data and move on.
+        else:
+            unparsed[name] = value
+
+    # We need to support getting the Description from the message payload in
+    # addition to getting it from the the headers. This does mean, though, there
+    # is the possibility of it being set both ways, in which case we put both
+    # in 'unparsed' since we don't know which is right.
+    try:
+        payload = _get_payload(parsed, data)
+    except ValueError:
+        unparsed.setdefault("description", []).append(
+            parsed.get_payload(decode=isinstance(data, bytes))  # type: ignore[call-overload]
+        )
+    else:
+        if payload:
+            # Check to see if we've already got a description, if so then both
+            # it, and this body move to unparsable.
+            if "description" in raw:
+                description_header = cast("str", raw.pop("description"))
+                unparsed.setdefault("description", []).extend(
+                    [description_header, payload]
+                )
+            elif "description" in unparsed:
+                unparsed["description"].append(payload)
+            else:
+                raw["description"] = payload
+
+    # We need to cast our `raw` to a metadata, because a TypedDict only support
+    # literal key names, but we're computing our key names on purpose, but the
+    # way this function is implemented, our `TypedDict` can only have valid key
+    # names.
+    return cast("RawMetadata", raw), unparsed
+
+
+_NOT_FOUND = object()
+
+
+# Keep the two values in sync.
+_VALID_METADATA_VERSIONS = ["1.0", "1.1", "1.2", "2.1", "2.2", "2.3", "2.4", "2.5"]
+_MetadataVersion = Literal["1.0", "1.1", "1.2", "2.1", "2.2", "2.3", "2.4", "2.5"]
+
+_REQUIRED_ATTRS = frozenset(["metadata_version", "name", "version"])
+
+
+class _Validator(Generic[T]):
+    """Validate a metadata field.
+
+    All _process_*() methods correspond to a core metadata field. The method is
+    called with the field's raw value. If the raw value is valid it is returned
+    in its "enriched" form (e.g. ``version.Version`` for the ``Version`` field).
+    If the raw value is invalid, :exc:`InvalidMetadata` is raised (with a cause
+    as appropriate).
+    """
+
+    name: str
+    raw_name: str
+    added: _MetadataVersion
+
+    def __init__(
+        self,
+        *,
+        added: _MetadataVersion = "1.0",
+    ) -> None:
+        self.added = added
+
+    def __set_name__(self, _owner: Metadata, name: str) -> None:
+        self.name = name
+        self.raw_name = _RAW_TO_EMAIL_MAPPING[name]
+
+    def __get__(self, instance: Metadata, _owner: type[Metadata]) -> T:
+        # With Python 3.8, the caching can be replaced with functools.cached_property().
+        # No need to check the cache as attribute lookup will resolve into the
+        # instance's __dict__ before __get__ is called.
+        cache = instance.__dict__
+        value = instance._raw.get(self.name)
+
+        # To make the _process_* methods easier, we'll check if the value is None
+        # and if this field is NOT a required attribute, and if both of those
+        # things are true, we'll skip the the converter. This will mean that the
+        # converters never have to deal with the None union.
+        if self.name in _REQUIRED_ATTRS or value is not None:
+            try:
+                converter: Callable[[Any], T] = getattr(self, f"_process_{self.name}")
+            except AttributeError:
+                pass
+            else:
+                value = converter(value)
+
+        cache[self.name] = value
+        try:
+            del instance._raw[self.name]  # type: ignore[misc]
+        except KeyError:
+            pass
+
+        return cast("T", value)
+
+    def _invalid_metadata(
+        self, msg: str, cause: Exception | None = None
+    ) -> InvalidMetadata:
+        exc = InvalidMetadata(
+            self.raw_name, msg.format_map({"field": repr(self.raw_name)})
+        )
+        exc.__cause__ = cause
+        return exc
+
+    def _process_metadata_version(self, value: str) -> _MetadataVersion:
+        # Implicitly makes Metadata-Version required.
+        if value not in _VALID_METADATA_VERSIONS:
+            raise self._invalid_metadata(f"{value!r} is not a valid metadata version")
+        return cast("_MetadataVersion", value)
+
+    def _process_name(self, value: str) -> str:
+        if not value:
+            raise self._invalid_metadata("{field} is a required field")
+        # Validate the name as a side-effect.
+        try:
+            utils.canonicalize_name(value, validate=True)
+        except utils.InvalidName as exc:
+            raise self._invalid_metadata(
+                f"{value!r} is invalid for {{field}}", cause=exc
+            ) from exc
+        else:
+            return value
+
+    def _process_version(self, value: str) -> version_module.Version:
+        if not value:
+            raise self._invalid_metadata("{field} is a required field")
+        try:
+            return version_module.parse(value)
+        except version_module.InvalidVersion as exc:
+            raise self._invalid_metadata(
+                f"{value!r} is invalid for {{field}}", cause=exc
+            ) from exc
+
+    def _process_summary(self, value: str) -> str:
+        """Check the field contains no newlines."""
+        if "\n" in value:
+            raise self._invalid_metadata("{field} must be a single line")
+        return value
+
+    def _process_description_content_type(self, value: str) -> str:
+        content_types = {"text/plain", "text/x-rst", "text/markdown"}
+        message = email.message.EmailMessage()
+        message["content-type"] = value
+
+        content_type, parameters = (
+            # Defaults to `text/plain` if parsing failed.
+            message.get_content_type().lower(),
+            message["content-type"].params,
+        )
+        # Check if content-type is valid or defaulted to `text/plain` and thus was
+        # not parseable.
+        if content_type not in content_types or content_type not in value.lower():
+            raise self._invalid_metadata(
+                f"{{field}} must be one of {list(content_types)}, not {value!r}"
+            )
+
+        charset = parameters.get("charset", "UTF-8")
+        if charset != "UTF-8":
+            raise self._invalid_metadata(
+                f"{{field}} can only specify the UTF-8 charset, not {list(charset)}"
+            )
+
+        markdown_variants = {"GFM", "CommonMark"}
+        variant = parameters.get("variant", "GFM")  # Use an acceptable default.
+        if content_type == "text/markdown" and variant not in markdown_variants:
+            raise self._invalid_metadata(
+                f"valid Markdown variants for {{field}} are {list(markdown_variants)}, "
+                f"not {variant!r}",
+            )
+        return value
+
+    def _process_dynamic(self, value: list[str]) -> list[str]:
+        for dynamic_field in map(str.lower, value):
+            if dynamic_field in {"name", "version", "metadata-version"}:
+                raise self._invalid_metadata(
+                    f"{dynamic_field!r} is not allowed as a dynamic field"
+                )
+            elif dynamic_field not in _EMAIL_TO_RAW_MAPPING:
+                raise self._invalid_metadata(
+                    f"{dynamic_field!r} is not a valid dynamic field"
+                )
+        return list(map(str.lower, value))
+
+    def _process_provides_extra(
+        self,
+        value: list[str],
+    ) -> list[utils.NormalizedName]:
+        normalized_names = []
+        try:
+            for name in value:
+                normalized_names.append(utils.canonicalize_name(name, validate=True))
+        except utils.InvalidName as exc:
+            raise self._invalid_metadata(
+                f"{name!r} is invalid for {{field}}", cause=exc
+            ) from exc
+        else:
+            return normalized_names
+
+    def _process_requires_python(self, value: str) -> specifiers.SpecifierSet:
+        try:
+            return specifiers.SpecifierSet(value)
+        except specifiers.InvalidSpecifier as exc:
+            raise self._invalid_metadata(
+                f"{value!r} is invalid for {{field}}", cause=exc
+            ) from exc
+
+    def _process_requires_dist(
+        self,
+        value: list[str],
+    ) -> list[requirements.Requirement]:
+        reqs = []
+        try:
+            for req in value:
+                reqs.append(requirements.Requirement(req))
+        except requirements.InvalidRequirement as exc:
+            raise self._invalid_metadata(
+                f"{req!r} is invalid for {{field}}", cause=exc
+            ) from exc
+        else:
+            return reqs
+
+    def _process_license_expression(self, value: str) -> NormalizedLicenseExpression:
+        try:
+            return licenses.canonicalize_license_expression(value)
+        except ValueError as exc:
+            raise self._invalid_metadata(
+                f"{value!r} is invalid for {{field}}", cause=exc
+            ) from exc
+
+    def _process_license_files(self, value: list[str]) -> list[str]:
+        paths = []
+        for path in value:
+            if ".." in path:
+                raise self._invalid_metadata(
+                    f"{path!r} is invalid for {{field}}, "
+                    "parent directory indicators are not allowed"
+                )
+            if "*" in path:
+                raise self._invalid_metadata(
+                    f"{path!r} is invalid for {{field}}, paths must be resolved"
+                )
+            if (
+                pathlib.PurePosixPath(path).is_absolute()
+                or pathlib.PureWindowsPath(path).is_absolute()
+            ):
+                raise self._invalid_metadata(
+                    f"{path!r} is invalid for {{field}}, paths must be relative"
+                )
+            if pathlib.PureWindowsPath(path).as_posix() != path:
+                raise self._invalid_metadata(
+                    f"{path!r} is invalid for {{field}}, paths must use '/' delimiter"
+                )
+            paths.append(path)
+        return paths
+
+    def _process_import_names(self, value: list[str]) -> list[str]:
+        for import_name in value:
+            name, semicolon, private = import_name.partition(";")
+            name = name.rstrip()
+            for identifier in name.split("."):
+                if not identifier.isidentifier():
+                    raise self._invalid_metadata(
+                        f"{name!r} is invalid for {{field}}; "
+                        f"{identifier!r} is not a valid identifier"
+                    )
+                elif keyword.iskeyword(identifier):
+                    raise self._invalid_metadata(
+                        f"{name!r} is invalid for {{field}}; "
+                        f"{identifier!r} is a keyword"
+                    )
+            if semicolon and private.lstrip() != "private":
+                raise self._invalid_metadata(
+                    f"{import_name!r} is invalid for {{field}}; "
+                    "the only valid option is 'private'"
+                )
+        return value
+
+    _process_import_namespaces = _process_import_names
+
+
+class Metadata:
+    """Representation of distribution metadata.
+
+    Compared to :class:`RawMetadata`, this class provides objects representing
+    metadata fields instead of only using built-in types. Any invalid metadata
+    will cause :exc:`InvalidMetadata` to be raised (with a
+    :py:attr:`~BaseException.__cause__` attribute as appropriate).
+    """
+
+    _raw: RawMetadata
+
+    @classmethod
+    def from_raw(cls, data: RawMetadata, *, validate: bool = True) -> Metadata:
+        """Create an instance from :class:`RawMetadata`.
+
+        If *validate* is true, all metadata will be validated. All exceptions
+        related to validation will be gathered and raised as an :class:`ExceptionGroup`.
+        """
+        ins = cls()
+        ins._raw = data.copy()  # Mutations occur due to caching enriched values.
+
+        if validate:
+            exceptions: list[Exception] = []
+            try:
+                metadata_version = ins.metadata_version
+                metadata_age = _VALID_METADATA_VERSIONS.index(metadata_version)
+            except InvalidMetadata as metadata_version_exc:
+                exceptions.append(metadata_version_exc)
+                metadata_version = None
+
+            # Make sure to check for the fields that are present, the required
+            # fields (so their absence can be reported).
+            fields_to_check = frozenset(ins._raw) | _REQUIRED_ATTRS
+            # Remove fields that have already been checked.
+            fields_to_check -= {"metadata_version"}
+
+            for key in fields_to_check:
+                try:
+                    if metadata_version:
+                        # Can't use getattr() as that triggers descriptor protocol which
+                        # will fail due to no value for the instance argument.
+                        try:
+                            field_metadata_version = cls.__dict__[key].added
+                        except KeyError:
+                            exc = InvalidMetadata(key, f"unrecognized field: {key!r}")
+                            exceptions.append(exc)
+                            continue
+                        field_age = _VALID_METADATA_VERSIONS.index(
+                            field_metadata_version
+                        )
+                        if field_age > metadata_age:
+                            field = _RAW_TO_EMAIL_MAPPING[key]
+                            exc = InvalidMetadata(
+                                field,
+                                f"{field} introduced in metadata version "
+                                f"{field_metadata_version}, not {metadata_version}",
+                            )
+                            exceptions.append(exc)
+                            continue
+                    getattr(ins, key)
+                except InvalidMetadata as exc:
+                    exceptions.append(exc)
+
+            if exceptions:
+                raise ExceptionGroup("invalid metadata", exceptions)
+
+        return ins
+
+    @classmethod
+    def from_email(cls, data: bytes | str, *, validate: bool = True) -> Metadata:
+        """Parse metadata from email headers.
+
+        If *validate* is true, the metadata will be validated. All exceptions
+        related to validation will be gathered and raised as an :class:`ExceptionGroup`.
+        """
+        raw, unparsed = parse_email(data)
+
+        if validate:
+            exceptions: list[Exception] = []
+            for unparsed_key in unparsed:
+                if unparsed_key in _EMAIL_TO_RAW_MAPPING:
+                    message = f"{unparsed_key!r} has invalid data"
+                else:
+                    message = f"unrecognized field: {unparsed_key!r}"
+                exceptions.append(InvalidMetadata(unparsed_key, message))
+
+            if exceptions:
+                raise ExceptionGroup("unparsed", exceptions)
+
+        try:
+            return cls.from_raw(raw, validate=validate)
+        except ExceptionGroup as exc_group:
+            raise ExceptionGroup(
+                "invalid or unparsed metadata", exc_group.exceptions
+            ) from None
+
+    metadata_version: _Validator[_MetadataVersion] = _Validator()
+    """:external:ref:`core-metadata-metadata-version`
+    (required; validated to be a valid metadata version)"""
+    # `name` is not normalized/typed to NormalizedName so as to provide access to
+    # the original/raw name.
+    name: _Validator[str] = _Validator()
+    """:external:ref:`core-metadata-name`
+    (required; validated using :func:`~packaging.utils.canonicalize_name` and its
+    *validate* parameter)"""
+    version: _Validator[version_module.Version] = _Validator()
+    """:external:ref:`core-metadata-version` (required)"""
+    dynamic: _Validator[list[str] | None] = _Validator(
+        added="2.2",
+    )
+    """:external:ref:`core-metadata-dynamic`
+    (validated against core metadata field names and lowercased)"""
+    platforms: _Validator[list[str] | None] = _Validator()
+    """:external:ref:`core-metadata-platform`"""
+    supported_platforms: _Validator[list[str] | None] = _Validator(added="1.1")
+    """:external:ref:`core-metadata-supported-platform`"""
+    summary: _Validator[str | None] = _Validator()
+    """:external:ref:`core-metadata-summary` (validated to contain no newlines)"""
+    description: _Validator[str | None] = _Validator()  # TODO 2.1: can be in body
+    """:external:ref:`core-metadata-description`"""
+    description_content_type: _Validator[str | None] = _Validator(added="2.1")
+    """:external:ref:`core-metadata-description-content-type` (validated)"""
+    keywords: _Validator[list[str] | None] = _Validator()
+    """:external:ref:`core-metadata-keywords`"""
+    home_page: _Validator[str | None] = _Validator()
+    """:external:ref:`core-metadata-home-page`"""
+    download_url: _Validator[str | None] = _Validator(added="1.1")
+    """:external:ref:`core-metadata-download-url`"""
+    author: _Validator[str | None] = _Validator()
+    """:external:ref:`core-metadata-author`"""
+    author_email: _Validator[str | None] = _Validator()
+    """:external:ref:`core-metadata-author-email`"""
+    maintainer: _Validator[str | None] = _Validator(added="1.2")
+    """:external:ref:`core-metadata-maintainer`"""
+    maintainer_email: _Validator[str | None] = _Validator(added="1.2")
+    """:external:ref:`core-metadata-maintainer-email`"""
+    license: _Validator[str | None] = _Validator()
+    """:external:ref:`core-metadata-license`"""
+    license_expression: _Validator[NormalizedLicenseExpression | None] = _Validator(
+        added="2.4"
+    )
+    """:external:ref:`core-metadata-license-expression`"""
+    license_files: _Validator[list[str] | None] = _Validator(added="2.4")
+    """:external:ref:`core-metadata-license-file`"""
+    classifiers: _Validator[list[str] | None] = _Validator(added="1.1")
+    """:external:ref:`core-metadata-classifier`"""
+    requires_dist: _Validator[list[requirements.Requirement] | None] = _Validator(
+        added="1.2"
+    )
+    """:external:ref:`core-metadata-requires-dist`"""
+    requires_python: _Validator[specifiers.SpecifierSet | None] = _Validator(
+        added="1.2"
+    )
+    """:external:ref:`core-metadata-requires-python`"""
+    # Because `Requires-External` allows for non-PEP 440 version specifiers, we
+    # don't do any processing on the values.
+    requires_external: _Validator[list[str] | None] = _Validator(added="1.2")
+    """:external:ref:`core-metadata-requires-external`"""
+    project_urls: _Validator[dict[str, str] | None] = _Validator(added="1.2")
+    """:external:ref:`core-metadata-project-url`"""
+    # PEP 685 lets us raise an error if an extra doesn't pass `Name` validation
+    # regardless of metadata version.
+    provides_extra: _Validator[list[utils.NormalizedName] | None] = _Validator(
+        added="2.1",
+    )
+    """:external:ref:`core-metadata-provides-extra`"""
+    provides_dist: _Validator[list[str] | None] = _Validator(added="1.2")
+    """:external:ref:`core-metadata-provides-dist`"""
+    obsoletes_dist: _Validator[list[str] | None] = _Validator(added="1.2")
+    """:external:ref:`core-metadata-obsoletes-dist`"""
+    import_names: _Validator[list[str] | None] = _Validator(added="2.5")
+    """:external:ref:`core-metadata-import-name`"""
+    import_namespaces: _Validator[list[str] | None] = _Validator(added="2.5")
+    """:external:ref:`core-metadata-import-namespace`"""
+    requires: _Validator[list[str] | None] = _Validator(added="1.1")
+    """``Requires`` (deprecated)"""
+    provides: _Validator[list[str] | None] = _Validator(added="1.1")
+    """``Provides`` (deprecated)"""
+    obsoletes: _Validator[list[str] | None] = _Validator(added="1.1")
+    """``Obsoletes`` (deprecated)"""
+
+    def as_rfc822(self) -> RFC822Message:
+        """
+        Return an RFC822 message with the metadata.
+        """
+        message = RFC822Message()
+        self._write_metadata(message)
+        return message
+
+    def _write_metadata(self, message: RFC822Message) -> None:
+        """
+        Return an RFC822 message with the metadata.
+        """
+        for name, validator in self.__class__.__dict__.items():
+            if isinstance(validator, _Validator) and name != "description":
+                value = getattr(self, name)
+                email_name = _RAW_TO_EMAIL_MAPPING[name]
+                if value is not None:
+                    if email_name == "project-url":
+                        for label, url in value.items():
+                            message[email_name] = f"{label}, {url}"
+                    elif email_name == "keywords":
+                        message[email_name] = ",".join(value)
+                    elif email_name == "import-name" and value == []:
+                        message[email_name] = ""
+                    elif isinstance(value, list):
+                        for item in value:
+                            message[email_name] = str(item)
+                    else:
+                        message[email_name] = str(value)
+
+        # The description is a special case because it is in the body of the message.
+        if self.description is not None:
+            message.set_payload(self.description)

python/Lib/site-packages/setuptools/_vendor/packaging/pylock.py

@@ -0,0 +1,635 @@
+from __future__ import annotations
+
+import dataclasses
+import logging
+import re
+from collections.abc import Mapping, Sequence
+from dataclasses import dataclass
+from datetime import datetime
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Protocol,
+    TypeVar,
+)
+
+from .markers import Marker
+from .specifiers import SpecifierSet
+from .utils import NormalizedName, is_normalized_name
+from .version import Version
+
+if TYPE_CHECKING:  # pragma: no cover
+    from pathlib import Path
+
+    from typing_extensions import Self
+
+_logger = logging.getLogger(__name__)
+
+__all__ = [
+    "Package",
+    "PackageArchive",
+    "PackageDirectory",
+    "PackageSdist",
+    "PackageVcs",
+    "PackageWheel",
+    "Pylock",
+    "PylockUnsupportedVersionError",
+    "PylockValidationError",
+    "is_valid_pylock_path",
+]
+
+_T = TypeVar("_T")
+_T2 = TypeVar("_T2")
+
+
+class _FromMappingProtocol(Protocol):  # pragma: no cover
+    @classmethod
+    def _from_dict(cls, d: Mapping[str, Any]) -> Self: ...
+
+
+_FromMappingProtocolT = TypeVar("_FromMappingProtocolT", bound=_FromMappingProtocol)
+
+
+_PYLOCK_FILE_NAME_RE = re.compile(r"^pylock\.([^.]+)\.toml$")
+
+
+def is_valid_pylock_path(path: Path) -> bool:
+    """Check if the given path is a valid pylock file path."""
+    return path.name == "pylock.toml" or bool(_PYLOCK_FILE_NAME_RE.match(path.name))
+
+
+def _toml_key(key: str) -> str:
+    return key.replace("_", "-")
+
+
+def _toml_value(key: str, value: Any) -> Any:  # noqa: ANN401
+    if isinstance(value, (Version, Marker, SpecifierSet)):
+        return str(value)
+    if isinstance(value, Sequence) and key == "environments":
+        return [str(v) for v in value]
+    return value
+
+
+def _toml_dict_factory(data: list[tuple[str, Any]]) -> dict[str, Any]:
+    return {
+        _toml_key(key): _toml_value(key, value)
+        for key, value in data
+        if value is not None
+    }
+
+
+def _get(d: Mapping[str, Any], expected_type: type[_T], key: str) -> _T | None:
+    """Get a value from the dictionary and verify it's the expected type."""
+    if (value := d.get(key)) is None:
+        return None
+    if not isinstance(value, expected_type):
+        raise PylockValidationError(
+            f"Unexpected type {type(value).__name__} "
+            f"(expected {expected_type.__name__})",
+            context=key,
+        )
+    return value
+
+
+def _get_required(d: Mapping[str, Any], expected_type: type[_T], key: str) -> _T:
+    """Get a required value from the dictionary and verify it's the expected type."""
+    if (value := _get(d, expected_type, key)) is None:
+        raise _PylockRequiredKeyError(key)
+    return value
+
+
+def _get_sequence(
+    d: Mapping[str, Any], expected_item_type: type[_T], key: str
+) -> Sequence[_T] | None:
+    """Get a list value from the dictionary and verify it's the expected items type."""
+    if (value := _get(d, Sequence, key)) is None:  # type: ignore[type-abstract]
+        return None
+    if isinstance(value, (str, bytes)):
+        # special case: str and bytes are Sequences, but we want to reject it
+        raise PylockValidationError(
+            f"Unexpected type {type(value).__name__} (expected Sequence)",
+            context=key,
+        )
+    for i, item in enumerate(value):
+        if not isinstance(item, expected_item_type):
+            raise PylockValidationError(
+                f"Unexpected type {type(item).__name__} "
+                f"(expected {expected_item_type.__name__})",
+                context=f"{key}[{i}]",
+            )
+    return value
+
+
+def _get_as(
+    d: Mapping[str, Any],
+    expected_type: type[_T],
+    target_type: Callable[[_T], _T2],
+    key: str,
+) -> _T2 | None:
+    """Get a value from the dictionary, verify it's the expected type,
+    and convert to the target type.
+
+    This assumes the target_type constructor accepts the value.
+    """
+    if (value := _get(d, expected_type, key)) is None:
+        return None
+    try:
+        return target_type(value)
+    except Exception as e:
+        raise PylockValidationError(e, context=key) from e
+
+
+def _get_required_as(
+    d: Mapping[str, Any],
+    expected_type: type[_T],
+    target_type: Callable[[_T], _T2],
+    key: str,
+) -> _T2:
+    """Get a required value from the dict, verify it's the expected type,
+    and convert to the target type."""
+    if (value := _get_as(d, expected_type, target_type, key)) is None:
+        raise _PylockRequiredKeyError(key)
+    return value
+
+
+def _get_sequence_as(
+    d: Mapping[str, Any],
+    expected_item_type: type[_T],
+    target_item_type: Callable[[_T], _T2],
+    key: str,
+) -> list[_T2] | None:
+    """Get list value from dictionary and verify expected items type."""
+    if (value := _get_sequence(d, expected_item_type, key)) is None:
+        return None
+    result = []
+    try:
+        for item in value:
+            typed_item = target_item_type(item)
+            result.append(typed_item)
+    except Exception as e:
+        raise PylockValidationError(e, context=f"{key}[{len(result)}]") from e
+    return result
+
+
+def _get_object(
+    d: Mapping[str, Any], target_type: type[_FromMappingProtocolT], key: str
+) -> _FromMappingProtocolT | None:
+    """Get a dictionary value from the dictionary and convert it to a dataclass."""
+    if (value := _get(d, Mapping, key)) is None:  # type: ignore[type-abstract]
+        return None
+    try:
+        return target_type._from_dict(value)
+    except Exception as e:
+        raise PylockValidationError(e, context=key) from e
+
+
+def _get_sequence_of_objects(
+    d: Mapping[str, Any], target_item_type: type[_FromMappingProtocolT], key: str
+) -> list[_FromMappingProtocolT] | None:
+    """Get a list value from the dictionary and convert its items to a dataclass."""
+    if (value := _get_sequence(d, Mapping, key)) is None:  # type: ignore[type-abstract]
+        return None
+    result: list[_FromMappingProtocolT] = []
+    try:
+        for item in value:
+            typed_item = target_item_type._from_dict(item)
+            result.append(typed_item)
+    except Exception as e:
+        raise PylockValidationError(e, context=f"{key}[{len(result)}]") from e
+    return result
+
+
+def _get_required_sequence_of_objects(
+    d: Mapping[str, Any], target_item_type: type[_FromMappingProtocolT], key: str
+) -> Sequence[_FromMappingProtocolT]:
+    """Get a required list value from the dictionary and convert its items to a
+    dataclass."""
+    if (result := _get_sequence_of_objects(d, target_item_type, key)) is None:
+        raise _PylockRequiredKeyError(key)
+    return result
+
+
+def _validate_normalized_name(name: str) -> NormalizedName:
+    """Validate that a string is a NormalizedName."""
+    if not is_normalized_name(name):
+        raise PylockValidationError(f"Name {name!r} is not normalized")
+    return NormalizedName(name)
+
+
+def _validate_path_url(path: str | None, url: str | None) -> None:
+    if not path and not url:
+        raise PylockValidationError("path or url must be provided")
+
+
+def _validate_hashes(hashes: Mapping[str, Any]) -> Mapping[str, Any]:
+    if not hashes:
+        raise PylockValidationError("At least one hash must be provided")
+    if not all(isinstance(hash_val, str) for hash_val in hashes.values()):
+        raise PylockValidationError("Hash values must be strings")
+    return hashes
+
+
+class PylockValidationError(Exception):
+    """Raised when when input data is not spec-compliant."""
+
+    context: str | None = None
+    message: str
+
+    def __init__(
+        self,
+        cause: str | Exception,
+        *,
+        context: str | None = None,
+    ) -> None:
+        if isinstance(cause, PylockValidationError):
+            if cause.context:
+                self.context = (
+                    f"{context}.{cause.context}" if context else cause.context
+                )
+            else:
+                self.context = context
+            self.message = cause.message
+        else:
+            self.context = context
+            self.message = str(cause)
+
+    def __str__(self) -> str:
+        if self.context:
+            return f"{self.message} in {self.context!r}"
+        return self.message
+
+
+class _PylockRequiredKeyError(PylockValidationError):
+    def __init__(self, key: str) -> None:
+        super().__init__("Missing required value", context=key)
+
+
+class PylockUnsupportedVersionError(PylockValidationError):
+    """Raised when encountering an unsupported `lock_version`."""
+
+
+@dataclass(frozen=True, init=False)
+class PackageVcs:
+    type: str
+    url: str | None = None
+    path: str | None = None
+    requested_revision: str | None = None
+    commit_id: str  # type: ignore[misc]
+    subdirectory: str | None = None
+
+    def __init__(
+        self,
+        *,
+        type: str,
+        url: str | None = None,
+        path: str | None = None,
+        requested_revision: str | None = None,
+        commit_id: str,
+        subdirectory: str | None = None,
+    ) -> None:
+        # In Python 3.10+ make dataclass kw_only=True and remove __init__
+        object.__setattr__(self, "type", type)
+        object.__setattr__(self, "url", url)
+        object.__setattr__(self, "path", path)
+        object.__setattr__(self, "requested_revision", requested_revision)
+        object.__setattr__(self, "commit_id", commit_id)
+        object.__setattr__(self, "subdirectory", subdirectory)
+
+    @classmethod
+    def _from_dict(cls, d: Mapping[str, Any]) -> Self:
+        package_vcs = cls(
+            type=_get_required(d, str, "type"),
+            url=_get(d, str, "url"),
+            path=_get(d, str, "path"),
+            requested_revision=_get(d, str, "requested-revision"),
+            commit_id=_get_required(d, str, "commit-id"),
+            subdirectory=_get(d, str, "subdirectory"),
+        )
+        _validate_path_url(package_vcs.path, package_vcs.url)
+        return package_vcs
+
+
+@dataclass(frozen=True, init=False)
+class PackageDirectory:
+    path: str
+    editable: bool | None = None
+    subdirectory: str | None = None
+
+    def __init__(
+        self,
+        *,
+        path: str,
+        editable: bool | None = None,
+        subdirectory: str | None = None,
+    ) -> None:
+        # In Python 3.10+ make dataclass kw_only=True and remove __init__
+        object.__setattr__(self, "path", path)
+        object.__setattr__(self, "editable", editable)
+        object.__setattr__(self, "subdirectory", subdirectory)
+
+    @classmethod
+    def _from_dict(cls, d: Mapping[str, Any]) -> Self:
+        return cls(
+            path=_get_required(d, str, "path"),
+            editable=_get(d, bool, "editable"),
+            subdirectory=_get(d, str, "subdirectory"),
+        )
+
+
+@dataclass(frozen=True, init=False)
+class PackageArchive:
+    url: str | None = None
+    path: str | None = None
+    size: int | None = None
+    upload_time: datetime | None = None
+    hashes: Mapping[str, str]  # type: ignore[misc]
+    subdirectory: str | None = None
+
+    def __init__(
+        self,
+        *,
+        url: str | None = None,
+        path: str | None = None,
+        size: int | None = None,
+        upload_time: datetime | None = None,
+        hashes: Mapping[str, str],
+        subdirectory: str | None = None,
+    ) -> None:
+        # In Python 3.10+ make dataclass kw_only=True and remove __init__
+        object.__setattr__(self, "url", url)
+        object.__setattr__(self, "path", path)
+        object.__setattr__(self, "size", size)
+        object.__setattr__(self, "upload_time", upload_time)
+        object.__setattr__(self, "hashes", hashes)
+        object.__setattr__(self, "subdirectory", subdirectory)
+
+    @classmethod
+    def _from_dict(cls, d: Mapping[str, Any]) -> Self:
+        package_archive = cls(
+            url=_get(d, str, "url"),
+            path=_get(d, str, "path"),
+            size=_get(d, int, "size"),
+            upload_time=_get(d, datetime, "upload-time"),
+            hashes=_get_required_as(d, Mapping, _validate_hashes, "hashes"),  # type: ignore[type-abstract]
+            subdirectory=_get(d, str, "subdirectory"),
+        )
+        _validate_path_url(package_archive.path, package_archive.url)
+        return package_archive
+
+
+@dataclass(frozen=True, init=False)
+class PackageSdist:
+    name: str | None = None
+    upload_time: datetime | None = None
+    url: str | None = None
+    path: str | None = None
+    size: int | None = None
+    hashes: Mapping[str, str]  # type: ignore[misc]
+
+    def __init__(
+        self,
+        *,
+        name: str | None = None,
+        upload_time: datetime | None = None,
+        url: str | None = None,
+        path: str | None = None,
+        size: int | None = None,
+        hashes: Mapping[str, str],
+    ) -> None:
+        # In Python 3.10+ make dataclass kw_only=True and remove __init__
+        object.__setattr__(self, "name", name)
+        object.__setattr__(self, "upload_time", upload_time)
+        object.__setattr__(self, "url", url)
+        object.__setattr__(self, "path", path)
+        object.__setattr__(self, "size", size)
+        object.__setattr__(self, "hashes", hashes)
+
+    @classmethod
+    def _from_dict(cls, d: Mapping[str, Any]) -> Self:
+        package_sdist = cls(
+            name=_get(d, str, "name"),
+            upload_time=_get(d, datetime, "upload-time"),
+            url=_get(d, str, "url"),
+            path=_get(d, str, "path"),
+            size=_get(d, int, "size"),
+            hashes=_get_required_as(d, Mapping, _validate_hashes, "hashes"),  # type: ignore[type-abstract]
+        )
+        _validate_path_url(package_sdist.path, package_sdist.url)
+        return package_sdist
+
+
+@dataclass(frozen=True, init=False)
+class PackageWheel:
+    name: str | None = None
+    upload_time: datetime | None = None
+    url: str | None = None
+    path: str | None = None
+    size: int | None = None
+    hashes: Mapping[str, str]  # type: ignore[misc]
+
+    def __init__(
+        self,
+        *,
+        name: str | None = None,
+        upload_time: datetime | None = None,
+        url: str | None = None,
+        path: str | None = None,
+        size: int | None = None,
+        hashes: Mapping[str, str],
+    ) -> None:
+        # In Python 3.10+ make dataclass kw_only=True and remove __init__
+        object.__setattr__(self, "name", name)
+        object.__setattr__(self, "upload_time", upload_time)
+        object.__setattr__(self, "url", url)
+        object.__setattr__(self, "path", path)
+        object.__setattr__(self, "size", size)
+        object.__setattr__(self, "hashes", hashes)
+
+    @classmethod
+    def _from_dict(cls, d: Mapping[str, Any]) -> Self:
+        package_wheel = cls(
+            name=_get(d, str, "name"),
+            upload_time=_get(d, datetime, "upload-time"),
+            url=_get(d, str, "url"),
+            path=_get(d, str, "path"),
+            size=_get(d, int, "size"),
+            hashes=_get_required_as(d, Mapping, _validate_hashes, "hashes"),  # type: ignore[type-abstract]
+        )
+        _validate_path_url(package_wheel.path, package_wheel.url)
+        return package_wheel
+
+
+@dataclass(frozen=True, init=False)
+class Package:
+    name: NormalizedName
+    version: Version | None = None
+    marker: Marker | None = None
+    requires_python: SpecifierSet | None = None
+    dependencies: Sequence[Mapping[str, Any]] | None = None
+    vcs: PackageVcs | None = None
+    directory: PackageDirectory | None = None
+    archive: PackageArchive | None = None
+    index: str | None = None
+    sdist: PackageSdist | None = None
+    wheels: Sequence[PackageWheel] | None = None
+    attestation_identities: Sequence[Mapping[str, Any]] | None = None
+    tool: Mapping[str, Any] | None = None
+
+    def __init__(
+        self,
+        *,
+        name: NormalizedName,
+        version: Version | None = None,
+        marker: Marker | None = None,
+        requires_python: SpecifierSet | None = None,
+        dependencies: Sequence[Mapping[str, Any]] | None = None,
+        vcs: PackageVcs | None = None,
+        directory: PackageDirectory | None = None,
+        archive: PackageArchive | None = None,
+        index: str | None = None,
+        sdist: PackageSdist | None = None,
+        wheels: Sequence[PackageWheel] | None = None,
+        attestation_identities: Sequence[Mapping[str, Any]] | None = None,
+        tool: Mapping[str, Any] | None = None,
+    ) -> None:
+        # In Python 3.10+ make dataclass kw_only=True and remove __init__
+        object.__setattr__(self, "name", name)
+        object.__setattr__(self, "version", version)
+        object.__setattr__(self, "marker", marker)
+        object.__setattr__(self, "requires_python", requires_python)
+        object.__setattr__(self, "dependencies", dependencies)
+        object.__setattr__(self, "vcs", vcs)
+        object.__setattr__(self, "directory", directory)
+        object.__setattr__(self, "archive", archive)
+        object.__setattr__(self, "index", index)
+        object.__setattr__(self, "sdist", sdist)
+        object.__setattr__(self, "wheels", wheels)
+        object.__setattr__(self, "attestation_identities", attestation_identities)
+        object.__setattr__(self, "tool", tool)
+
+    @classmethod
+    def _from_dict(cls, d: Mapping[str, Any]) -> Self:
+        package = cls(
+            name=_get_required_as(d, str, _validate_normalized_name, "name"),
+            version=_get_as(d, str, Version, "version"),
+            requires_python=_get_as(d, str, SpecifierSet, "requires-python"),
+            dependencies=_get_sequence(d, Mapping, "dependencies"),  # type: ignore[type-abstract]
+            marker=_get_as(d, str, Marker, "marker"),
+            vcs=_get_object(d, PackageVcs, "vcs"),
+            directory=_get_object(d, PackageDirectory, "directory"),
+            archive=_get_object(d, PackageArchive, "archive"),
+            index=_get(d, str, "index"),
+            sdist=_get_object(d, PackageSdist, "sdist"),
+            wheels=_get_sequence_of_objects(d, PackageWheel, "wheels"),
+            attestation_identities=_get_sequence(d, Mapping, "attestation-identities"),  # type: ignore[type-abstract]
+            tool=_get(d, Mapping, "tool"),  # type: ignore[type-abstract]
+        )
+        distributions = bool(package.sdist) + len(package.wheels or [])
+        direct_urls = (
+            bool(package.vcs) + bool(package.directory) + bool(package.archive)
+        )
+        if distributions > 0 and direct_urls > 0:
+            raise PylockValidationError(
+                "None of vcs, directory, archive must be set if sdist or wheels are set"
+            )
+        if distributions == 0 and direct_urls != 1:
+            raise PylockValidationError(
+                "Exactly one of vcs, directory, archive must be set "
+                "if sdist and wheels are not set"
+            )
+        try:
+            for i, attestation_identity in enumerate(  # noqa: B007
+                package.attestation_identities or []
+            ):
+                _get_required(attestation_identity, str, "kind")
+        except Exception as e:
+            raise PylockValidationError(
+                e, context=f"attestation-identities[{i}]"
+            ) from e
+        return package
+
+    @property
+    def is_direct(self) -> bool:
+        return not (self.sdist or self.wheels)
+
+
+@dataclass(frozen=True, init=False)
+class Pylock:
+    """A class representing a pylock file."""
+
+    lock_version: Version
+    environments: Sequence[Marker] | None = None
+    requires_python: SpecifierSet | None = None
+    extras: Sequence[NormalizedName] | None = None
+    dependency_groups: Sequence[str] | None = None
+    default_groups: Sequence[str] | None = None
+    created_by: str  # type: ignore[misc]
+    packages: Sequence[Package]  # type: ignore[misc]
+    tool: Mapping[str, Any] | None = None
+
+    def __init__(
+        self,
+        *,
+        lock_version: Version,
+        environments: Sequence[Marker] | None = None,
+        requires_python: SpecifierSet | None = None,
+        extras: Sequence[NormalizedName] | None = None,
+        dependency_groups: Sequence[str] | None = None,
+        default_groups: Sequence[str] | None = None,
+        created_by: str,
+        packages: Sequence[Package],
+        tool: Mapping[str, Any] | None = None,
+    ) -> None:
+        # In Python 3.10+ make dataclass kw_only=True and remove __init__
+        object.__setattr__(self, "lock_version", lock_version)
+        object.__setattr__(self, "environments", environments)
+        object.__setattr__(self, "requires_python", requires_python)
+        object.__setattr__(self, "extras", extras)
+        object.__setattr__(self, "dependency_groups", dependency_groups)
+        object.__setattr__(self, "default_groups", default_groups)
+        object.__setattr__(self, "created_by", created_by)
+        object.__setattr__(self, "packages", packages)
+        object.__setattr__(self, "tool", tool)
+
+    @classmethod
+    def _from_dict(cls, d: Mapping[str, Any]) -> Self:
+        pylock = cls(
+            lock_version=_get_required_as(d, str, Version, "lock-version"),
+            environments=_get_sequence_as(d, str, Marker, "environments"),
+            extras=_get_sequence_as(d, str, _validate_normalized_name, "extras"),
+            dependency_groups=_get_sequence(d, str, "dependency-groups"),
+            default_groups=_get_sequence(d, str, "default-groups"),
+            created_by=_get_required(d, str, "created-by"),
+            requires_python=_get_as(d, str, SpecifierSet, "requires-python"),
+            packages=_get_required_sequence_of_objects(d, Package, "packages"),
+            tool=_get(d, Mapping, "tool"),  # type: ignore[type-abstract]
+        )
+        if not Version("1") <= pylock.lock_version < Version("2"):
+            raise PylockUnsupportedVersionError(
+                f"pylock version {pylock.lock_version} is not supported"
+            )
+        if pylock.lock_version > Version("1.0"):
+            _logger.warning(
+                "pylock minor version %s is not supported", pylock.lock_version
+            )
+        return pylock
+
+    @classmethod
+    def from_dict(cls, d: Mapping[str, Any], /) -> Self:
+        """Create and validate a Pylock instance from a TOML dictionary.
+
+        Raises :class:`PylockValidationError` if the input data is not
+        spec-compliant.
+        """
+        return cls._from_dict(d)
+
+    def to_dict(self) -> Mapping[str, Any]:
+        """Convert the Pylock instance to a TOML dictionary."""
+        return dataclasses.asdict(self, dict_factory=_toml_dict_factory)
+
+    def validate(self) -> None:
+        """Validate the Pylock instance against the specification.
+
+        Raises :class:`PylockValidationError` otherwise."""
+        self.from_dict(self.to_dict())

python/Lib/site-packages/setuptools/_vendor/packaging/requirements.py

@@ -0,0 +1,86 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import annotations
+
+from typing import Iterator
+
+from ._parser import parse_requirement as _parse_requirement
+from ._tokenizer import ParserSyntaxError
+from .markers import Marker, _normalize_extra_values
+from .specifiers import SpecifierSet
+from .utils import canonicalize_name
+
+
+class InvalidRequirement(ValueError):
+    """
+    An invalid requirement was found, users should refer to PEP 508.
+    """
+
+
+class Requirement:
+    """Parse a requirement.
+
+    Parse a given requirement string into its parts, such as name, specifier,
+    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
+    string.
+    """
+
+    # TODO: Can we test whether something is contained within a requirement?
+    #       If so how do we do that? Do we need to test against the _name_ of
+    #       the thing as well as the version? What about the markers?
+    # TODO: Can we normalize the name and extra name?
+
+    def __init__(self, requirement_string: str) -> None:
+        try:
+            parsed = _parse_requirement(requirement_string)
+        except ParserSyntaxError as e:
+            raise InvalidRequirement(str(e)) from e
+
+        self.name: str = parsed.name
+        self.url: str | None = parsed.url or None
+        self.extras: set[str] = set(parsed.extras or [])
+        self.specifier: SpecifierSet = SpecifierSet(parsed.specifier)
+        self.marker: Marker | None = None
+        if parsed.marker is not None:
+            self.marker = Marker.__new__(Marker)
+            self.marker._markers = _normalize_extra_values(parsed.marker)
+
+    def _iter_parts(self, name: str) -> Iterator[str]:
+        yield name
+
+        if self.extras:
+            formatted_extras = ",".join(sorted(self.extras))
+            yield f"[{formatted_extras}]"
+
+        if self.specifier:
+            yield str(self.specifier)
+
+        if self.url:
+            yield f" @ {self.url}"
+            if self.marker:
+                yield " "
+
+        if self.marker:
+            yield f"; {self.marker}"
+
+    def __str__(self) -> str:
+        return "".join(self._iter_parts(self.name))
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__}('{self}')>"
+
+    def __hash__(self) -> int:
+        return hash(tuple(self._iter_parts(canonicalize_name(self.name))))
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Requirement):
+            return NotImplemented
+
+        return (
+            canonicalize_name(self.name) == canonicalize_name(other.name)
+            and self.extras == other.extras
+            and self.specifier == other.specifier
+            and self.url == other.url
+            and self.marker == other.marker
+        )

python/Lib/site-packages/setuptools/_vendor/packaging/specifiers.py

@@ -0,0 +1,1068 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+"""
+.. testsetup::
+
+    from packaging.specifiers import Specifier, SpecifierSet, InvalidSpecifier
+    from packaging.version import Version
+"""
+
+from __future__ import annotations
+
+import abc
+import itertools
+import re
+from typing import Callable, Final, Iterable, Iterator, TypeVar, Union
+
+from .utils import canonicalize_version
+from .version import InvalidVersion, Version
+
+UnparsedVersion = Union[Version, str]
+UnparsedVersionVar = TypeVar("UnparsedVersionVar", bound=UnparsedVersion)
+CallableOperator = Callable[[Version, str], bool]
+
+
+def _coerce_version(version: UnparsedVersion) -> Version | None:
+    if not isinstance(version, Version):
+        try:
+            version = Version(version)
+        except InvalidVersion:
+            return None
+    return version
+
+
+def _public_version(version: Version) -> Version:
+    return version.__replace__(local=None)
+
+
+def _base_version(version: Version) -> Version:
+    return version.__replace__(pre=None, post=None, dev=None, local=None)
+
+
+class InvalidSpecifier(ValueError):
+    """
+    Raised when attempting to create a :class:`Specifier` with a specifier
+    string that is invalid.
+
+    >>> Specifier("lolwat")
+    Traceback (most recent call last):
+        ...
+    packaging.specifiers.InvalidSpecifier: Invalid specifier: 'lolwat'
+    """
+
+
+class BaseSpecifier(metaclass=abc.ABCMeta):
+    __slots__ = ()
+    __match_args__ = ("_str",)
+
+    @property
+    def _str(self) -> str:
+        """Internal property for match_args"""
+        return str(self)
+
+    @abc.abstractmethod
+    def __str__(self) -> str:
+        """
+        Returns the str representation of this Specifier-like object. This
+        should be representative of the Specifier itself.
+        """
+
+    @abc.abstractmethod
+    def __hash__(self) -> int:
+        """
+        Returns a hash value for this Specifier-like object.
+        """
+
+    @abc.abstractmethod
+    def __eq__(self, other: object) -> bool:
+        """
+        Returns a boolean representing whether or not the two Specifier-like
+        objects are equal.
+
+        :param other: The other object to check against.
+        """
+
+    @property
+    @abc.abstractmethod
+    def prereleases(self) -> bool | None:
+        """Whether or not pre-releases as a whole are allowed.
+
+        This can be set to either ``True`` or ``False`` to explicitly enable or disable
+        prereleases or it can be set to ``None`` (the default) to use default semantics.
+        """
+
+    @prereleases.setter  # noqa: B027
+    def prereleases(self, value: bool) -> None:
+        """Setter for :attr:`prereleases`.
+
+        :param value: The value to set.
+        """
+
+    @abc.abstractmethod
+    def contains(self, item: str, prereleases: bool | None = None) -> bool:
+        """
+        Determines if the given item is contained within this specifier.
+        """
+
+    @abc.abstractmethod
+    def filter(
+        self, iterable: Iterable[UnparsedVersionVar], prereleases: bool | None = None
+    ) -> Iterator[UnparsedVersionVar]:
+        """
+        Takes an iterable of items and filters them so that only items which
+        are contained within this specifier are allowed in it.
+        """
+
+
+class Specifier(BaseSpecifier):
+    """This class abstracts handling of version specifiers.
+
+    .. tip::
+
+        It is generally not required to instantiate this manually. You should instead
+        prefer to work with :class:`SpecifierSet` instead, which can parse
+        comma-separated version specifiers (which is what package metadata contains).
+    """
+
+    __slots__ = ("_prereleases", "_spec", "_spec_version")
+
+    _operator_regex_str = r"""
+        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
+        """
+    _version_regex_str = r"""
+        (?P<version>
+            (?:
+                # The identity operators allow for an escape hatch that will
+                # do an exact string match of the version you wish to install.
+                # This will not be parsed by PEP 440 and we cannot determine
+                # any semantic meaning from it. This operator is discouraged
+                # but included entirely as an escape hatch.
+                (?<====)  # Only match for the identity operator
+                \s*
+                [^\s;)]*  # The arbitrary version can be just about anything,
+                          # we match everything except for whitespace, a
+                          # semi-colon for marker support, and a closing paren
+                          # since versions can be enclosed in them.
+            )
+            |
+            (?:
+                # The (non)equality operators allow for wild card and local
+                # versions to be specified so we have to define these two
+                # operators separately to enable that.
+                (?<===|!=)            # Only match for equals and not equals
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+
+                # You cannot use a wild card and a pre-release, post-release, a dev or
+                # local version together so group them with a | and make them optional.
+                (?:
+                    \.\*  # Wild card syntax of .*
+                    |
+                    (?:                                  # pre release
+                        [-_\.]?
+                        (alpha|beta|preview|pre|a|b|c|rc)
+                        [-_\.]?
+                        [0-9]*
+                    )?
+                    (?:                                  # post release
+                        (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                    )?
+                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+                )?
+            )
+            |
+            (?:
+                # The compatible operator requires at least two digits in the
+                # release segment.
+                (?<=~=)               # Only match for the compatible operator
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+                (?:                   # pre release
+                    [-_\.]?
+                    (alpha|beta|preview|pre|a|b|c|rc)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+            |
+            (?:
+                # All other operators only allow a sub set of what the
+                # (non)equality operators do. Specifically they do not allow
+                # local versions to be specified nor do they allow the prefix
+                # matching wild cards.
+                (?<!==|!=|~=)         # We have special cases for these
+                                      # operators so we want to make sure they
+                                      # don't match here.
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (alpha|beta|preview|pre|a|b|c|rc)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+        )
+        """
+
+    _regex = re.compile(
+        r"\s*" + _operator_regex_str + _version_regex_str + r"\s*",
+        re.VERBOSE | re.IGNORECASE,
+    )
+
+    _operators: Final = {
+        "~=": "compatible",
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+        "===": "arbitrary",
+    }
+
+    def __init__(self, spec: str = "", prereleases: bool | None = None) -> None:
+        """Initialize a Specifier instance.
+
+        :param spec:
+            The string representation of a specifier which will be parsed and
+            normalized before use.
+        :param prereleases:
+            This tells the specifier if it should accept prerelease versions if
+            applicable or not. The default of ``None`` will autodetect it from the
+            given specifiers.
+        :raises InvalidSpecifier:
+            If the given specifier is invalid (i.e. bad syntax).
+        """
+        match = self._regex.fullmatch(spec)
+        if not match:
+            raise InvalidSpecifier(f"Invalid specifier: {spec!r}")
+
+        self._spec: tuple[str, str] = (
+            match.group("operator").strip(),
+            match.group("version").strip(),
+        )
+
+        # Store whether or not this Specifier should accept prereleases
+        self._prereleases = prereleases
+
+        # Specifier version cache
+        self._spec_version: tuple[str, Version] | None = None
+
+    def _get_spec_version(self, version: str) -> Version | None:
+        """One element cache, as only one spec Version is needed per Specifier."""
+        if self._spec_version is not None and self._spec_version[0] == version:
+            return self._spec_version[1]
+
+        version_specifier = _coerce_version(version)
+        if version_specifier is None:
+            return None
+
+        self._spec_version = (version, version_specifier)
+        return version_specifier
+
+    def _require_spec_version(self, version: str) -> Version:
+        """Get spec version, asserting it's valid (not for === operator).
+
+        This method should only be called for operators where version
+        strings are guaranteed to be valid PEP 440 versions (not ===).
+        """
+        spec_version = self._get_spec_version(version)
+        assert spec_version is not None
+        return spec_version
+
+    @property
+    def prereleases(self) -> bool | None:
+        # If there is an explicit prereleases set for this, then we'll just
+        # blindly use that.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # Only the "!=" operator does not imply prereleases when
+        # the version in the specifier is a prerelease.
+        operator, version_str = self._spec
+        if operator != "!=":
+            # The == specifier with trailing .* cannot include prereleases
+            # e.g. "==1.0a1.*" is not valid.
+            if operator == "==" and version_str.endswith(".*"):
+                return False
+
+            # "===" can have arbitrary string versions, so we cannot parse
+            # those, we take prereleases as unknown (None) for those.
+            version = self._get_spec_version(version_str)
+            if version is None:
+                return None
+
+            # For all other operators, use the check if spec Version
+            # object implies pre-releases.
+            if version.is_prerelease:
+                return True
+
+        return False
+
+    @prereleases.setter
+    def prereleases(self, value: bool | None) -> None:
+        self._prereleases = value
+
+    @property
+    def operator(self) -> str:
+        """The operator of this specifier.
+
+        >>> Specifier("==1.2.3").operator
+        '=='
+        """
+        return self._spec[0]
+
+    @property
+    def version(self) -> str:
+        """The version of this specifier.
+
+        >>> Specifier("==1.2.3").version
+        '1.2.3'
+        """
+        return self._spec[1]
+
+    def __repr__(self) -> str:
+        """A representation of the Specifier that shows all internal state.
+
+        >>> Specifier('>=1.0.0')
+        <Specifier('>=1.0.0')>
+        >>> Specifier('>=1.0.0', prereleases=False)
+        <Specifier('>=1.0.0', prereleases=False)>
+        >>> Specifier('>=1.0.0', prereleases=True)
+        <Specifier('>=1.0.0', prereleases=True)>
+        """
+        pre = (
+            f", prereleases={self.prereleases!r}"
+            if self._prereleases is not None
+            else ""
+        )
+
+        return f"<{self.__class__.__name__}({str(self)!r}{pre})>"
+
+    def __str__(self) -> str:
+        """A string representation of the Specifier that can be round-tripped.
+
+        >>> str(Specifier('>=1.0.0'))
+        '>=1.0.0'
+        >>> str(Specifier('>=1.0.0', prereleases=False))
+        '>=1.0.0'
+        """
+        return "{}{}".format(*self._spec)
+
+    @property
+    def _canonical_spec(self) -> tuple[str, str]:
+        operator, version = self._spec
+        if operator == "===" or version.endswith(".*"):
+            return operator, version
+
+        spec_version = self._require_spec_version(version)
+
+        canonical_version = canonicalize_version(
+            spec_version, strip_trailing_zero=(operator != "~=")
+        )
+
+        return operator, canonical_version
+
+    def __hash__(self) -> int:
+        return hash(self._canonical_spec)
+
+    def __eq__(self, other: object) -> bool:
+        """Whether or not the two Specifier-like objects are equal.
+
+        :param other: The other object to check against.
+
+        The value of :attr:`prereleases` is ignored.
+
+        >>> Specifier("==1.2.3") == Specifier("== 1.2.3.0")
+        True
+        >>> (Specifier("==1.2.3", prereleases=False) ==
+        ...  Specifier("==1.2.3", prereleases=True))
+        True
+        >>> Specifier("==1.2.3") == "==1.2.3"
+        True
+        >>> Specifier("==1.2.3") == Specifier("==1.2.4")
+        False
+        >>> Specifier("==1.2.3") == Specifier("~=1.2.3")
+        False
+        """
+        if isinstance(other, str):
+            try:
+                other = self.__class__(str(other))
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._canonical_spec == other._canonical_spec
+
+    def _get_operator(self, op: str) -> CallableOperator:
+        operator_callable: CallableOperator = getattr(
+            self, f"_compare_{self._operators[op]}"
+        )
+        return operator_callable
+
+    def _compare_compatible(self, prospective: Version, spec: str) -> bool:
+        # Compatible releases have an equivalent combination of >= and ==. That
+        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
+        # implement this in terms of the other specifiers instead of
+        # implementing it ourselves. The only thing we need to do is construct
+        # the other specifiers.
+
+        # We want everything but the last item in the version, but we want to
+        # ignore suffix segments.
+        prefix = _version_join(
+            list(itertools.takewhile(_is_not_suffix, _version_split(spec)))[:-1]
+        )
+
+        # Add the prefix notation to the end of our string
+        prefix += ".*"
+
+        return self._get_operator(">=")(prospective, spec) and self._get_operator("==")(
+            prospective, prefix
+        )
+
+    def _compare_equal(self, prospective: Version, spec: str) -> bool:
+        # We need special logic to handle prefix matching
+        if spec.endswith(".*"):
+            # In the case of prefix matching we want to ignore local segment.
+            normalized_prospective = canonicalize_version(
+                _public_version(prospective), strip_trailing_zero=False
+            )
+            # Get the normalized version string ignoring the trailing .*
+            normalized_spec = canonicalize_version(spec[:-2], strip_trailing_zero=False)
+            # Split the spec out by bangs and dots, and pretend that there is
+            # an implicit dot in between a release segment and a pre-release segment.
+            split_spec = _version_split(normalized_spec)
+
+            # Split the prospective version out by bangs and dots, and pretend
+            # that there is an implicit dot in between a release segment and
+            # a pre-release segment.
+            split_prospective = _version_split(normalized_prospective)
+
+            # 0-pad the prospective version before shortening it to get the correct
+            # shortened version.
+            padded_prospective, _ = _pad_version(split_prospective, split_spec)
+
+            # Shorten the prospective version to be the same length as the spec
+            # so that we can determine if the specifier is a prefix of the
+            # prospective version or not.
+            shortened_prospective = padded_prospective[: len(split_spec)]
+
+            return shortened_prospective == split_spec
+        else:
+            # Convert our spec string into a Version
+            spec_version = self._require_spec_version(spec)
+
+            # If the specifier does not have a local segment, then we want to
+            # act as if the prospective version also does not have a local
+            # segment.
+            if not spec_version.local:
+                prospective = _public_version(prospective)
+
+            return prospective == spec_version
+
+    def _compare_not_equal(self, prospective: Version, spec: str) -> bool:
+        return not self._compare_equal(prospective, spec)
+
+    def _compare_less_than_equal(self, prospective: Version, spec: str) -> bool:
+        # NB: Local version identifiers are NOT permitted in the version
+        # specifier, so local version labels can be universally removed from
+        # the prospective version.
+        return _public_version(prospective) <= self._require_spec_version(spec)
+
+    def _compare_greater_than_equal(self, prospective: Version, spec: str) -> bool:
+        # NB: Local version identifiers are NOT permitted in the version
+        # specifier, so local version labels can be universally removed from
+        # the prospective version.
+        return _public_version(prospective) >= self._require_spec_version(spec)
+
+    def _compare_less_than(self, prospective: Version, spec_str: str) -> bool:
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = self._require_spec_version(spec_str)
+
+        # Check to see if the prospective version is less than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective < spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a pre-release version, that we do not accept pre-release
+        # versions for the version mentioned in the specifier (e.g. <3.1 should
+        # not match 3.1.dev0, but should match 3.0.dev0).
+        if (
+            not spec.is_prerelease
+            and prospective.is_prerelease
+            and _base_version(prospective) == _base_version(spec)
+        ):
+            return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # less than the spec version *and* it's not a pre-release of the same
+        # version in the spec.
+        return True
+
+    def _compare_greater_than(self, prospective: Version, spec_str: str) -> bool:
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = self._require_spec_version(spec_str)
+
+        # Check to see if the prospective version is greater than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective > spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a post-release version, that we do not accept
+        # post-release versions for the version mentioned in the specifier
+        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
+        if (
+            not spec.is_postrelease
+            and prospective.is_postrelease
+            and _base_version(prospective) == _base_version(spec)
+        ):
+            return False
+
+        # Ensure that we do not allow a local version of the version mentioned
+        # in the specifier, which is technically greater than, to match.
+        if prospective.local is not None and _base_version(
+            prospective
+        ) == _base_version(spec):
+            return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # greater than the spec version *and* it's not a pre-release of the
+        # same version in the spec.
+        return True
+
+    def _compare_arbitrary(self, prospective: Version | str, spec: str) -> bool:
+        return str(prospective).lower() == str(spec).lower()
+
+    def __contains__(self, item: str | Version) -> bool:
+        """Return whether or not the item is contained in this specifier.
+
+        :param item: The item to check for.
+
+        This is used for the ``in`` operator and behaves the same as
+        :meth:`contains` with no ``prereleases`` argument passed.
+
+        >>> "1.2.3" in Specifier(">=1.2.3")
+        True
+        >>> Version("1.2.3") in Specifier(">=1.2.3")
+        True
+        >>> "1.0.0" in Specifier(">=1.2.3")
+        False
+        >>> "1.3.0a1" in Specifier(">=1.2.3")
+        True
+        >>> "1.3.0a1" in Specifier(">=1.2.3", prereleases=True)
+        True
+        """
+        return self.contains(item)
+
+    def contains(self, item: UnparsedVersion, prereleases: bool | None = None) -> bool:
+        """Return whether or not the item is contained in this specifier.
+
+        :param item:
+            The item to check for, which can be a version string or a
+            :class:`Version` instance.
+        :param prereleases:
+            Whether or not to match prereleases with this Specifier. If set to
+            ``None`` (the default), it will follow the recommendation from
+            :pep:`440` and match prereleases, as there are no other versions.
+
+        >>> Specifier(">=1.2.3").contains("1.2.3")
+        True
+        >>> Specifier(">=1.2.3").contains(Version("1.2.3"))
+        True
+        >>> Specifier(">=1.2.3").contains("1.0.0")
+        False
+        >>> Specifier(">=1.2.3").contains("1.3.0a1")
+        True
+        >>> Specifier(">=1.2.3", prereleases=False).contains("1.3.0a1")
+        False
+        >>> Specifier(">=1.2.3").contains("1.3.0a1")
+        True
+        """
+
+        return bool(list(self.filter([item], prereleases=prereleases)))
+
+    def filter(
+        self, iterable: Iterable[UnparsedVersionVar], prereleases: bool | None = None
+    ) -> Iterator[UnparsedVersionVar]:
+        """Filter items in the given iterable, that match the specifier.
+
+        :param iterable:
+            An iterable that can contain version strings and :class:`Version` instances.
+            The items in the iterable will be filtered according to the specifier.
+        :param prereleases:
+            Whether or not to allow prereleases in the returned iterator. If set to
+            ``None`` (the default), it will follow the recommendation from :pep:`440`
+            and match prereleases if there are no other versions.
+
+        >>> list(Specifier(">=1.2.3").filter(["1.2", "1.3", "1.5a1"]))
+        ['1.3']
+        >>> list(Specifier(">=1.2.3").filter(["1.2", "1.2.3", "1.3", Version("1.4")]))
+        ['1.2.3', '1.3', <Version('1.4')>]
+        >>> list(Specifier(">=1.2.3").filter(["1.2", "1.5a1"]))
+        ['1.5a1']
+        >>> list(Specifier(">=1.2.3").filter(["1.3", "1.5a1"], prereleases=True))
+        ['1.3', '1.5a1']
+        >>> list(Specifier(">=1.2.3", prereleases=True).filter(["1.3", "1.5a1"]))
+        ['1.3', '1.5a1']
+        """
+        prereleases_versions = []
+        found_non_prereleases = False
+
+        # Determine if to include prereleases by default
+        include_prereleases = (
+            prereleases if prereleases is not None else self.prereleases
+        )
+
+        # Get the matching operator
+        operator_callable = self._get_operator(self.operator)
+
+        # Filter versions
+        for version in iterable:
+            parsed_version = _coerce_version(version)
+            if parsed_version is None:
+                # === operator can match arbitrary (non-version) strings
+                if self.operator == "===" and self._compare_arbitrary(
+                    version, self.version
+                ):
+                    yield version
+            elif operator_callable(parsed_version, self.version):
+                # If it's not a prerelease or prereleases are allowed, yield it directly
+                if not parsed_version.is_prerelease or include_prereleases:
+                    found_non_prereleases = True
+                    yield version
+                # Otherwise collect prereleases for potential later use
+                elif prereleases is None and self._prereleases is not False:
+                    prereleases_versions.append(version)
+
+        # If no non-prereleases were found and prereleases weren't
+        # explicitly forbidden, yield the collected prereleases
+        if (
+            not found_non_prereleases
+            and prereleases is None
+            and self._prereleases is not False
+        ):
+            yield from prereleases_versions
+
+
+_prefix_regex = re.compile(r"([0-9]+)((?:a|b|c|rc)[0-9]+)")
+
+
+def _version_split(version: str) -> list[str]:
+    """Split version into components.
+
+    The split components are intended for version comparison. The logic does
+    not attempt to retain the original version string, so joining the
+    components back with :func:`_version_join` may not produce the original
+    version string.
+    """
+    result: list[str] = []
+
+    epoch, _, rest = version.rpartition("!")
+    result.append(epoch or "0")
+
+    for item in rest.split("."):
+        match = _prefix_regex.fullmatch(item)
+        if match:
+            result.extend(match.groups())
+        else:
+            result.append(item)
+    return result
+
+
+def _version_join(components: list[str]) -> str:
+    """Join split version components into a version string.
+
+    This function assumes the input came from :func:`_version_split`, where the
+    first component must be the epoch (either empty or numeric), and all other
+    components numeric.
+    """
+    epoch, *rest = components
+    return f"{epoch}!{'.'.join(rest)}"
+
+
+def _is_not_suffix(segment: str) -> bool:
+    return not any(
+        segment.startswith(prefix) for prefix in ("dev", "a", "b", "rc", "post")
+    )
+
+
+def _pad_version(left: list[str], right: list[str]) -> tuple[list[str], list[str]]:
+    left_split, right_split = [], []
+
+    # Get the release segment of our versions
+    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
+    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
+
+    # Get the rest of our versions
+    left_split.append(left[len(left_split[0]) :])
+    right_split.append(right[len(right_split[0]) :])
+
+    # Insert our padding
+    left_split.insert(1, ["0"] * max(0, len(right_split[0]) - len(left_split[0])))
+    right_split.insert(1, ["0"] * max(0, len(left_split[0]) - len(right_split[0])))
+
+    return (
+        list(itertools.chain.from_iterable(left_split)),
+        list(itertools.chain.from_iterable(right_split)),
+    )
+
+
+class SpecifierSet(BaseSpecifier):
+    """This class abstracts handling of a set of version specifiers.
+
+    It can be passed a single specifier (``>=3.0``), a comma-separated list of
+    specifiers (``>=3.0,!=3.1``), or no specifier at all.
+    """
+
+    __slots__ = ("_prereleases", "_specs")
+
+    def __init__(
+        self,
+        specifiers: str | Iterable[Specifier] = "",
+        prereleases: bool | None = None,
+    ) -> None:
+        """Initialize a SpecifierSet instance.
+
+        :param specifiers:
+            The string representation of a specifier or a comma-separated list of
+            specifiers which will be parsed and normalized before use.
+            May also be an iterable of ``Specifier`` instances, which will be used
+            as is.
+        :param prereleases:
+            This tells the SpecifierSet if it should accept prerelease versions if
+            applicable or not. The default of ``None`` will autodetect it from the
+            given specifiers.
+
+        :raises InvalidSpecifier:
+            If the given ``specifiers`` are not parseable than this exception will be
+            raised.
+        """
+
+        if isinstance(specifiers, str):
+            # Split on `,` to break each individual specifier into its own item, and
+            # strip each item to remove leading/trailing whitespace.
+            split_specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
+
+            # Make each individual specifier a Specifier and save in a frozen set
+            # for later.
+            self._specs = frozenset(map(Specifier, split_specifiers))
+        else:
+            # Save the supplied specifiers in a frozen set.
+            self._specs = frozenset(specifiers)
+
+        # Store our prereleases value so we can use it later to determine if
+        # we accept prereleases or not.
+        self._prereleases = prereleases
+
+    @property
+    def prereleases(self) -> bool | None:
+        # If we have been given an explicit prerelease modifier, then we'll
+        # pass that through here.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # If we don't have any specifiers, and we don't have a forced value,
+        # then we'll just return None since we don't know if this should have
+        # pre-releases or not.
+        if not self._specs:
+            return None
+
+        # Otherwise we'll see if any of the given specifiers accept
+        # prereleases, if any of them do we'll return True, otherwise False.
+        if any(s.prereleases for s in self._specs):
+            return True
+
+        return None
+
+    @prereleases.setter
+    def prereleases(self, value: bool | None) -> None:
+        self._prereleases = value
+
+    def __repr__(self) -> str:
+        """A representation of the specifier set that shows all internal state.
+
+        Note that the ordering of the individual specifiers within the set may not
+        match the input string.
+
+        >>> SpecifierSet('>=1.0.0,!=2.0.0')
+        <SpecifierSet('!=2.0.0,>=1.0.0')>
+        >>> SpecifierSet('>=1.0.0,!=2.0.0', prereleases=False)
+        <SpecifierSet('!=2.0.0,>=1.0.0', prereleases=False)>
+        >>> SpecifierSet('>=1.0.0,!=2.0.0', prereleases=True)
+        <SpecifierSet('!=2.0.0,>=1.0.0', prereleases=True)>
+        """
+        pre = (
+            f", prereleases={self.prereleases!r}"
+            if self._prereleases is not None
+            else ""
+        )
+
+        return f"<SpecifierSet({str(self)!r}{pre})>"
+
+    def __str__(self) -> str:
+        """A string representation of the specifier set that can be round-tripped.
+
+        Note that the ordering of the individual specifiers within the set may not
+        match the input string.
+
+        >>> str(SpecifierSet(">=1.0.0,!=1.0.1"))
+        '!=1.0.1,>=1.0.0'
+        >>> str(SpecifierSet(">=1.0.0,!=1.0.1", prereleases=False))
+        '!=1.0.1,>=1.0.0'
+        """
+        return ",".join(sorted(str(s) for s in self._specs))
+
+    def __hash__(self) -> int:
+        return hash(self._specs)
+
+    def __and__(self, other: SpecifierSet | str) -> SpecifierSet:
+        """Return a SpecifierSet which is a combination of the two sets.
+
+        :param other: The other object to combine with.
+
+        >>> SpecifierSet(">=1.0.0,!=1.0.1") & '<=2.0.0,!=2.0.1'
+        <SpecifierSet('!=1.0.1,!=2.0.1,<=2.0.0,>=1.0.0')>
+        >>> SpecifierSet(">=1.0.0,!=1.0.1") & SpecifierSet('<=2.0.0,!=2.0.1')
+        <SpecifierSet('!=1.0.1,!=2.0.1,<=2.0.0,>=1.0.0')>
+        """
+        if isinstance(other, str):
+            other = SpecifierSet(other)
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        specifier = SpecifierSet()
+        specifier._specs = frozenset(self._specs | other._specs)
+
+        if self._prereleases is None and other._prereleases is not None:
+            specifier._prereleases = other._prereleases
+        elif (
+            self._prereleases is not None and other._prereleases is None
+        ) or self._prereleases == other._prereleases:
+            specifier._prereleases = self._prereleases
+        else:
+            raise ValueError(
+                "Cannot combine SpecifierSets with True and False prerelease overrides."
+            )
+
+        return specifier
+
+    def __eq__(self, other: object) -> bool:
+        """Whether or not the two SpecifierSet-like objects are equal.
+
+        :param other: The other object to check against.
+
+        The value of :attr:`prereleases` is ignored.
+
+        >>> SpecifierSet(">=1.0.0,!=1.0.1") == SpecifierSet(">=1.0.0,!=1.0.1")
+        True
+        >>> (SpecifierSet(">=1.0.0,!=1.0.1", prereleases=False) ==
+        ...  SpecifierSet(">=1.0.0,!=1.0.1", prereleases=True))
+        True
+        >>> SpecifierSet(">=1.0.0,!=1.0.1") == ">=1.0.0,!=1.0.1"
+        True
+        >>> SpecifierSet(">=1.0.0,!=1.0.1") == SpecifierSet(">=1.0.0")
+        False
+        >>> SpecifierSet(">=1.0.0,!=1.0.1") == SpecifierSet(">=1.0.0,!=1.0.2")
+        False
+        """
+        if isinstance(other, (str, Specifier)):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs == other._specs
+
+    def __len__(self) -> int:
+        """Returns the number of specifiers in this specifier set."""
+        return len(self._specs)
+
+    def __iter__(self) -> Iterator[Specifier]:
+        """
+        Returns an iterator over all the underlying :class:`Specifier` instances
+        in this specifier set.
+
+        >>> sorted(SpecifierSet(">=1.0.0,!=1.0.1"), key=str)
+        [<Specifier('!=1.0.1')>, <Specifier('>=1.0.0')>]
+        """
+        return iter(self._specs)
+
+    def __contains__(self, item: UnparsedVersion) -> bool:
+        """Return whether or not the item is contained in this specifier.
+
+        :param item: The item to check for.
+
+        This is used for the ``in`` operator and behaves the same as
+        :meth:`contains` with no ``prereleases`` argument passed.
+
+        >>> "1.2.3" in SpecifierSet(">=1.0.0,!=1.0.1")
+        True
+        >>> Version("1.2.3") in SpecifierSet(">=1.0.0,!=1.0.1")
+        True
+        >>> "1.0.1" in SpecifierSet(">=1.0.0,!=1.0.1")
+        False
+        >>> "1.3.0a1" in SpecifierSet(">=1.0.0,!=1.0.1")
+        True
+        >>> "1.3.0a1" in SpecifierSet(">=1.0.0,!=1.0.1", prereleases=True)
+        True
+        """
+        return self.contains(item)
+
+    def contains(
+        self,
+        item: UnparsedVersion,
+        prereleases: bool | None = None,
+        installed: bool | None = None,
+    ) -> bool:
+        """Return whether or not the item is contained in this SpecifierSet.
+
+        :param item:
+            The item to check for, which can be a version string or a
+            :class:`Version` instance.
+        :param prereleases:
+            Whether or not to match prereleases with this SpecifierSet. If set to
+            ``None`` (the default), it will follow the recommendation from :pep:`440`
+            and match prereleases, as there are no other versions.
+        :param installed:
+            Whether or not the item is installed. If set to ``True``, it will
+            accept prerelease versions even if the specifier does not allow them.
+
+        >>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.2.3")
+        True
+        >>> SpecifierSet(">=1.0.0,!=1.0.1").contains(Version("1.2.3"))
+        True
+        >>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.0.1")
+        False
+        >>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.3.0a1")
+        True
+        >>> SpecifierSet(">=1.0.0,!=1.0.1", prereleases=False).contains("1.3.0a1")
+        False
+        >>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.3.0a1", prereleases=True)
+        True
+        """
+        version = _coerce_version(item)
+
+        if version is not None and installed and version.is_prerelease:
+            prereleases = True
+
+        check_item = item if version is None else version
+        return bool(list(self.filter([check_item], prereleases=prereleases)))
+
+    def filter(
+        self, iterable: Iterable[UnparsedVersionVar], prereleases: bool | None = None
+    ) -> Iterator[UnparsedVersionVar]:
+        """Filter items in the given iterable, that match the specifiers in this set.
+
+        :param iterable:
+            An iterable that can contain version strings and :class:`Version` instances.
+            The items in the iterable will be filtered according to the specifier.
+        :param prereleases:
+            Whether or not to allow prereleases in the returned iterator. If set to
+            ``None`` (the default), it will follow the recommendation from :pep:`440`
+            and match prereleases if there are no other versions.
+
+        >>> list(SpecifierSet(">=1.2.3").filter(["1.2", "1.3", "1.5a1"]))
+        ['1.3']
+        >>> list(SpecifierSet(">=1.2.3").filter(["1.2", "1.3", Version("1.4")]))
+        ['1.3', <Version('1.4')>]
+        >>> list(SpecifierSet(">=1.2.3").filter(["1.2", "1.5a1"]))
+        ['1.5a1']
+        >>> list(SpecifierSet(">=1.2.3").filter(["1.3", "1.5a1"], prereleases=True))
+        ['1.3', '1.5a1']
+        >>> list(SpecifierSet(">=1.2.3", prereleases=True).filter(["1.3", "1.5a1"]))
+        ['1.3', '1.5a1']
+
+        An "empty" SpecifierSet will filter items based on the presence of prerelease
+        versions in the set.
+
+        >>> list(SpecifierSet("").filter(["1.3", "1.5a1"]))
+        ['1.3']
+        >>> list(SpecifierSet("").filter(["1.5a1"]))
+        ['1.5a1']
+        >>> list(SpecifierSet("", prereleases=True).filter(["1.3", "1.5a1"]))
+        ['1.3', '1.5a1']
+        >>> list(SpecifierSet("").filter(["1.3", "1.5a1"], prereleases=True))
+        ['1.3', '1.5a1']
+        """
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None and self.prereleases is not None:
+            prereleases = self.prereleases
+
+        # If we have any specifiers, then we want to wrap our iterable in the
+        # filter method for each one, this will act as a logical AND amongst
+        # each specifier.
+        if self._specs:
+            # When prereleases is None, we need to let all versions through
+            # the individual filters, then decide about prereleases at the end
+            # based on whether any non-prereleases matched ALL specs.
+            for spec in self._specs:
+                iterable = spec.filter(
+                    iterable, prereleases=True if prereleases is None else prereleases
+                )
+
+            if prereleases is not None:
+                # If we have a forced prereleases value,
+                # we can immediately return the iterator.
+                return iter(iterable)
+        else:
+            # Handle empty SpecifierSet cases where prereleases is not None.
+            if prereleases is True:
+                return iter(iterable)
+
+            if prereleases is False:
+                return (
+                    item
+                    for item in iterable
+                    if (version := _coerce_version(item)) is None
+                    or not version.is_prerelease
+                )
+
+        # Finally if prereleases is None, apply PEP 440 logic:
+        # exclude prereleases unless there are no final releases that matched.
+        filtered_items: list[UnparsedVersionVar] = []
+        found_prereleases: list[UnparsedVersionVar] = []
+        found_final_release = False
+
+        for item in iterable:
+            parsed_version = _coerce_version(item)
+            # Arbitrary strings are always included as it is not
+            # possible to determine if they are prereleases,
+            # and they have already passed all specifiers.
+            if parsed_version is None:
+                filtered_items.append(item)
+                found_prereleases.append(item)
+            elif parsed_version.is_prerelease:
+                found_prereleases.append(item)
+            else:
+                filtered_items.append(item)
+                found_final_release = True
+
+        return iter(filtered_items if found_final_release else found_prereleases)

python/Lib/site-packages/setuptools/_vendor/packaging/tags.py

@@ -0,0 +1,651 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import annotations
+
+import logging
+import platform
+import re
+import struct
+import subprocess
+import sys
+import sysconfig
+from importlib.machinery import EXTENSION_SUFFIXES
+from typing import (
+    Any,
+    Iterable,
+    Iterator,
+    Sequence,
+    Tuple,
+    cast,
+)
+
+from . import _manylinux, _musllinux
+
+logger = logging.getLogger(__name__)
+
+PythonVersion = Sequence[int]
+AppleVersion = Tuple[int, int]
+
+INTERPRETER_SHORT_NAMES: dict[str, str] = {
+    "python": "py",  # Generic.
+    "cpython": "cp",
+    "pypy": "pp",
+    "ironpython": "ip",
+    "jython": "jy",
+}
+
+
+_32_BIT_INTERPRETER = struct.calcsize("P") == 4
+
+
+class Tag:
+    """
+    A representation of the tag triple for a wheel.
+
+    Instances are considered immutable and thus are hashable. Equality checking
+    is also supported.
+    """
+
+    __slots__ = ["_abi", "_hash", "_interpreter", "_platform"]
+
+    def __init__(self, interpreter: str, abi: str, platform: str) -> None:
+        self._interpreter = interpreter.lower()
+        self._abi = abi.lower()
+        self._platform = platform.lower()
+        # The __hash__ of every single element in a Set[Tag] will be evaluated each time
+        # that a set calls its `.disjoint()` method, which may be called hundreds of
+        # times when scanning a page of links for packages with tags matching that
+        # Set[Tag]. Pre-computing the value here produces significant speedups for
+        # downstream consumers.
+        self._hash = hash((self._interpreter, self._abi, self._platform))
+
+    @property
+    def interpreter(self) -> str:
+        return self._interpreter
+
+    @property
+    def abi(self) -> str:
+        return self._abi
+
+    @property
+    def platform(self) -> str:
+        return self._platform
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Tag):
+            return NotImplemented
+
+        return (
+            (self._hash == other._hash)  # Short-circuit ASAP for perf reasons.
+            and (self._platform == other._platform)
+            and (self._abi == other._abi)
+            and (self._interpreter == other._interpreter)
+        )
+
+    def __hash__(self) -> int:
+        return self._hash
+
+    def __str__(self) -> str:
+        return f"{self._interpreter}-{self._abi}-{self._platform}"
+
+    def __repr__(self) -> str:
+        return f"<{self} @ {id(self)}>"
+
+    def __setstate__(self, state: tuple[None, dict[str, Any]]) -> None:
+        # The cached _hash is wrong when unpickling.
+        _, slots = state
+        for k, v in slots.items():
+            setattr(self, k, v)
+        self._hash = hash((self._interpreter, self._abi, self._platform))
+
+
+def parse_tag(tag: str) -> frozenset[Tag]:
+    """
+    Parses the provided tag (e.g. `py3-none-any`) into a frozenset of Tag instances.
+
+    Returning a set is required due to the possibility that the tag is a
+    compressed tag set.
+    """
+    tags = set()
+    interpreters, abis, platforms = tag.split("-")
+    for interpreter in interpreters.split("."):
+        for abi in abis.split("."):
+            for platform_ in platforms.split("."):
+                tags.add(Tag(interpreter, abi, platform_))
+    return frozenset(tags)
+
+
+def _get_config_var(name: str, warn: bool = False) -> int | str | None:
+    value: int | str | None = sysconfig.get_config_var(name)
+    if value is None and warn:
+        logger.debug(
+            "Config variable '%s' is unset, Python ABI tag may be incorrect", name
+        )
+    return value
+
+
+def _normalize_string(string: str) -> str:
+    return string.replace(".", "_").replace("-", "_").replace(" ", "_")
+
+
+def _is_threaded_cpython(abis: list[str]) -> bool:
+    """
+    Determine if the ABI corresponds to a threaded (`--disable-gil`) build.
+
+    The threaded builds are indicated by a "t" in the abiflags.
+    """
+    if len(abis) == 0:
+        return False
+    # expect e.g., cp313
+    m = re.match(r"cp\d+(.*)", abis[0])
+    if not m:
+        return False
+    abiflags = m.group(1)
+    return "t" in abiflags
+
+
+def _abi3_applies(python_version: PythonVersion, threading: bool) -> bool:
+    """
+    Determine if the Python version supports abi3.
+
+    PEP 384 was first implemented in Python 3.2. The threaded (`--disable-gil`)
+    builds do not support abi3.
+    """
+    return len(python_version) > 1 and tuple(python_version) >= (3, 2) and not threading
+
+
+def _cpython_abis(py_version: PythonVersion, warn: bool = False) -> list[str]:
+    py_version = tuple(py_version)  # To allow for version comparison.
+    abis = []
+    version = _version_nodot(py_version[:2])
+    threading = debug = pymalloc = ucs4 = ""
+    with_debug = _get_config_var("Py_DEBUG", warn)
+    has_refcount = hasattr(sys, "gettotalrefcount")
+    # Windows doesn't set Py_DEBUG, so checking for support of debug-compiled
+    # extension modules is the best option.
+    # https://github.com/pypa/pip/issues/3383#issuecomment-173267692
+    has_ext = "_d.pyd" in EXTENSION_SUFFIXES
+    if with_debug or (with_debug is None and (has_refcount or has_ext)):
+        debug = "d"
+    if py_version >= (3, 13) and _get_config_var("Py_GIL_DISABLED", warn):
+        threading = "t"
+    if py_version < (3, 8):
+        with_pymalloc = _get_config_var("WITH_PYMALLOC", warn)
+        if with_pymalloc or with_pymalloc is None:
+            pymalloc = "m"
+        if py_version < (3, 3):
+            unicode_size = _get_config_var("Py_UNICODE_SIZE", warn)
+            if unicode_size == 4 or (
+                unicode_size is None and sys.maxunicode == 0x10FFFF
+            ):
+                ucs4 = "u"
+    elif debug:
+        # Debug builds can also load "normal" extension modules.
+        # We can also assume no UCS-4 or pymalloc requirement.
+        abis.append(f"cp{version}{threading}")
+    abis.insert(0, f"cp{version}{threading}{debug}{pymalloc}{ucs4}")
+    return abis
+
+
+def cpython_tags(
+    python_version: PythonVersion | None = None,
+    abis: Iterable[str] | None = None,
+    platforms: Iterable[str] | None = None,
+    *,
+    warn: bool = False,
+) -> Iterator[Tag]:
+    """
+    Yields the tags for a CPython interpreter.
+
+    The tags consist of:
+    - cp<python_version>-<abi>-<platform>
+    - cp<python_version>-abi3-<platform>
+    - cp<python_version>-none-<platform>
+    - cp<less than python_version>-abi3-<platform>  # Older Python versions down to 3.2.
+
+    If python_version only specifies a major version then user-provided ABIs and
+    the 'none' ABItag will be used.
+
+    If 'abi3' or 'none' are specified in 'abis' then they will be yielded at
+    their normal position and not at the beginning.
+    """
+    if not python_version:
+        python_version = sys.version_info[:2]
+
+    interpreter = f"cp{_version_nodot(python_version[:2])}"
+
+    if abis is None:
+        abis = _cpython_abis(python_version, warn) if len(python_version) > 1 else []
+    abis = list(abis)
+    # 'abi3' and 'none' are explicitly handled later.
+    for explicit_abi in ("abi3", "none"):
+        try:
+            abis.remove(explicit_abi)
+        except ValueError:  # noqa: PERF203
+            pass
+
+    platforms = list(platforms or platform_tags())
+    for abi in abis:
+        for platform_ in platforms:
+            yield Tag(interpreter, abi, platform_)
+
+    threading = _is_threaded_cpython(abis)
+    use_abi3 = _abi3_applies(python_version, threading)
+    if use_abi3:
+        yield from (Tag(interpreter, "abi3", platform_) for platform_ in platforms)
+    yield from (Tag(interpreter, "none", platform_) for platform_ in platforms)
+
+    if use_abi3:
+        for minor_version in range(python_version[1] - 1, 1, -1):
+            for platform_ in platforms:
+                version = _version_nodot((python_version[0], minor_version))
+                interpreter = f"cp{version}"
+                yield Tag(interpreter, "abi3", platform_)
+
+
+def _generic_abi() -> list[str]:
+    """
+    Return the ABI tag based on EXT_SUFFIX.
+    """
+    # The following are examples of `EXT_SUFFIX`.
+    # We want to keep the parts which are related to the ABI and remove the
+    # parts which are related to the platform:
+    # - linux:   '.cpython-310-x86_64-linux-gnu.so' => cp310
+    # - mac:     '.cpython-310-darwin.so'           => cp310
+    # - win:     '.cp310-win_amd64.pyd'             => cp310
+    # - win:     '.pyd'                             => cp37 (uses _cpython_abis())
+    # - pypy:    '.pypy38-pp73-x86_64-linux-gnu.so' => pypy38_pp73
+    # - graalpy: '.graalpy-38-native-x86_64-darwin.dylib'
+    #                                               => graalpy_38_native
+
+    ext_suffix = _get_config_var("EXT_SUFFIX", warn=True)
+    if not isinstance(ext_suffix, str) or ext_suffix[0] != ".":
+        raise SystemError("invalid sysconfig.get_config_var('EXT_SUFFIX')")
+    parts = ext_suffix.split(".")
+    if len(parts) < 3:
+        # CPython3.7 and earlier uses ".pyd" on Windows.
+        return _cpython_abis(sys.version_info[:2])
+    soabi = parts[1]
+    if soabi.startswith("cpython"):
+        # non-windows
+        abi = "cp" + soabi.split("-")[1]
+    elif soabi.startswith("cp"):
+        # windows
+        abi = soabi.split("-")[0]
+    elif soabi.startswith("pypy"):
+        abi = "-".join(soabi.split("-")[:2])
+    elif soabi.startswith("graalpy"):
+        abi = "-".join(soabi.split("-")[:3])
+    elif soabi:
+        # pyston, ironpython, others?
+        abi = soabi
+    else:
+        return []
+    return [_normalize_string(abi)]
+
+
+def generic_tags(
+    interpreter: str | None = None,
+    abis: Iterable[str] | None = None,
+    platforms: Iterable[str] | None = None,
+    *,
+    warn: bool = False,
+) -> Iterator[Tag]:
+    """
+    Yields the tags for a generic interpreter.
+
+    The tags consist of:
+    - <interpreter>-<abi>-<platform>
+
+    The "none" ABI will be added if it was not explicitly provided.
+    """
+    if not interpreter:
+        interp_name = interpreter_name()
+        interp_version = interpreter_version(warn=warn)
+        interpreter = f"{interp_name}{interp_version}"
+    abis = _generic_abi() if abis is None else list(abis)
+    platforms = list(platforms or platform_tags())
+    if "none" not in abis:
+        abis.append("none")
+    for abi in abis:
+        for platform_ in platforms:
+            yield Tag(interpreter, abi, platform_)
+
+
+def _py_interpreter_range(py_version: PythonVersion) -> Iterator[str]:
+    """
+    Yields Python versions in descending order.
+
+    After the latest version, the major-only version will be yielded, and then
+    all previous versions of that major version.
+    """
+    if len(py_version) > 1:
+        yield f"py{_version_nodot(py_version[:2])}"
+    yield f"py{py_version[0]}"
+    if len(py_version) > 1:
+        for minor in range(py_version[1] - 1, -1, -1):
+            yield f"py{_version_nodot((py_version[0], minor))}"
+
+
+def compatible_tags(
+    python_version: PythonVersion | None = None,
+    interpreter: str | None = None,
+    platforms: Iterable[str] | None = None,
+) -> Iterator[Tag]:
+    """
+    Yields the sequence of tags that are compatible with a specific version of Python.
+
+    The tags consist of:
+    - py*-none-<platform>
+    - <interpreter>-none-any  # ... if `interpreter` is provided.
+    - py*-none-any
+    """
+    if not python_version:
+        python_version = sys.version_info[:2]
+    platforms = list(platforms or platform_tags())
+    for version in _py_interpreter_range(python_version):
+        for platform_ in platforms:
+            yield Tag(version, "none", platform_)
+    if interpreter:
+        yield Tag(interpreter, "none", "any")
+    for version in _py_interpreter_range(python_version):
+        yield Tag(version, "none", "any")
+
+
+def _mac_arch(arch: str, is_32bit: bool = _32_BIT_INTERPRETER) -> str:
+    if not is_32bit:
+        return arch
+
+    if arch.startswith("ppc"):
+        return "ppc"
+
+    return "i386"
+
+
+def _mac_binary_formats(version: AppleVersion, cpu_arch: str) -> list[str]:
+    formats = [cpu_arch]
+    if cpu_arch == "x86_64":
+        if version < (10, 4):
+            return []
+        formats.extend(["intel", "fat64", "fat32"])
+
+    elif cpu_arch == "i386":
+        if version < (10, 4):
+            return []
+        formats.extend(["intel", "fat32", "fat"])
+
+    elif cpu_arch == "ppc64":
+        # TODO: Need to care about 32-bit PPC for ppc64 through 10.2?
+        if version > (10, 5) or version < (10, 4):
+            return []
+        formats.append("fat64")
+
+    elif cpu_arch == "ppc":
+        if version > (10, 6):
+            return []
+        formats.extend(["fat32", "fat"])
+
+    if cpu_arch in {"arm64", "x86_64"}:
+        formats.append("universal2")
+
+    if cpu_arch in {"x86_64", "i386", "ppc64", "ppc", "intel"}:
+        formats.append("universal")
+
+    return formats
+
+
+def mac_platforms(
+    version: AppleVersion | None = None, arch: str | None = None
+) -> Iterator[str]:
+    """
+    Yields the platform tags for a macOS system.
+
+    The `version` parameter is a two-item tuple specifying the macOS version to
+    generate platform tags for. The `arch` parameter is the CPU architecture to
+    generate platform tags for. Both parameters default to the appropriate value
+    for the current system.
+    """
+    version_str, _, cpu_arch = platform.mac_ver()
+    if version is None:
+        version = cast("AppleVersion", tuple(map(int, version_str.split(".")[:2])))
+        if version == (10, 16):
+            # When built against an older macOS SDK, Python will report macOS 10.16
+            # instead of the real version.
+            version_str = subprocess.run(
+                [
+                    sys.executable,
+                    "-sS",
+                    "-c",
+                    "import platform; print(platform.mac_ver()[0])",
+                ],
+                check=True,
+                env={"SYSTEM_VERSION_COMPAT": "0"},
+                stdout=subprocess.PIPE,
+                text=True,
+            ).stdout
+            version = cast("AppleVersion", tuple(map(int, version_str.split(".")[:2])))
+
+    if arch is None:
+        arch = _mac_arch(cpu_arch)
+
+    if (10, 0) <= version < (11, 0):
+        # Prior to Mac OS 11, each yearly release of Mac OS bumped the
+        # "minor" version number.  The major version was always 10.
+        major_version = 10
+        for minor_version in range(version[1], -1, -1):
+            compat_version = major_version, minor_version
+            binary_formats = _mac_binary_formats(compat_version, arch)
+            for binary_format in binary_formats:
+                yield f"macosx_{major_version}_{minor_version}_{binary_format}"
+
+    if version >= (11, 0):
+        # Starting with Mac OS 11, each yearly release bumps the major version
+        # number.   The minor versions are now the midyear updates.
+        minor_version = 0
+        for major_version in range(version[0], 10, -1):
+            compat_version = major_version, minor_version
+            binary_formats = _mac_binary_formats(compat_version, arch)
+            for binary_format in binary_formats:
+                yield f"macosx_{major_version}_{minor_version}_{binary_format}"
+
+    if version >= (11, 0):
+        # Mac OS 11 on x86_64 is compatible with binaries from previous releases.
+        # Arm64 support was introduced in 11.0, so no Arm binaries from previous
+        # releases exist.
+        #
+        # However, the "universal2" binary format can have a
+        # macOS version earlier than 11.0 when the x86_64 part of the binary supports
+        # that version of macOS.
+        major_version = 10
+        if arch == "x86_64":
+            for minor_version in range(16, 3, -1):
+                compat_version = major_version, minor_version
+                binary_formats = _mac_binary_formats(compat_version, arch)
+                for binary_format in binary_formats:
+                    yield f"macosx_{major_version}_{minor_version}_{binary_format}"
+        else:
+            for minor_version in range(16, 3, -1):
+                compat_version = major_version, minor_version
+                binary_format = "universal2"
+                yield f"macosx_{major_version}_{minor_version}_{binary_format}"
+
+
+def ios_platforms(
+    version: AppleVersion | None = None, multiarch: str | None = None
+) -> Iterator[str]:
+    """
+    Yields the platform tags for an iOS system.
+
+    :param version: A two-item tuple specifying the iOS version to generate
+        platform tags for. Defaults to the current iOS version.
+    :param multiarch: The CPU architecture+ABI to generate platform tags for -
+        (the value used by `sys.implementation._multiarch` e.g.,
+        `arm64_iphoneos` or `x84_64_iphonesimulator`). Defaults to the current
+        multiarch value.
+    """
+    if version is None:
+        # if iOS is the current platform, ios_ver *must* be defined. However,
+        # it won't exist for CPython versions before 3.13, which causes a mypy
+        # error.
+        _, release, _, _ = platform.ios_ver()  # type: ignore[attr-defined, unused-ignore]
+        version = cast("AppleVersion", tuple(map(int, release.split(".")[:2])))
+
+    if multiarch is None:
+        multiarch = sys.implementation._multiarch
+    multiarch = multiarch.replace("-", "_")
+
+    ios_platform_template = "ios_{major}_{minor}_{multiarch}"
+
+    # Consider any iOS major.minor version from the version requested, down to
+    # 12.0. 12.0 is the first iOS version that is known to have enough features
+    # to support CPython. Consider every possible minor release up to X.9. There
+    # highest the minor has ever gone is 8 (14.8 and 15.8) but having some extra
+    # candidates that won't ever match doesn't really hurt, and it saves us from
+    # having to keep an explicit list of known iOS versions in the code. Return
+    # the results descending order of version number.
+
+    # If the requested major version is less than 12, there won't be any matches.
+    if version[0] < 12:
+        return
+
+    # Consider the actual X.Y version that was requested.
+    yield ios_platform_template.format(
+        major=version[0], minor=version[1], multiarch=multiarch
+    )
+
+    # Consider every minor version from X.0 to the minor version prior to the
+    # version requested by the platform.
+    for minor in range(version[1] - 1, -1, -1):
+        yield ios_platform_template.format(
+            major=version[0], minor=minor, multiarch=multiarch
+        )
+
+    for major in range(version[0] - 1, 11, -1):
+        for minor in range(9, -1, -1):
+            yield ios_platform_template.format(
+                major=major, minor=minor, multiarch=multiarch
+            )
+
+
+def android_platforms(
+    api_level: int | None = None, abi: str | None = None
+) -> Iterator[str]:
+    """
+    Yields the :attr:`~Tag.platform` tags for Android. If this function is invoked on
+    non-Android platforms, the ``api_level`` and ``abi`` arguments are required.
+
+    :param int api_level: The maximum `API level
+        <https://developer.android.com/tools/releases/platforms>`__ to return. Defaults
+        to the current system's version, as returned by ``platform.android_ver``.
+    :param str abi: The `Android ABI <https://developer.android.com/ndk/guides/abis>`__,
+        e.g. ``arm64_v8a``. Defaults to the current system's ABI , as returned by
+        ``sysconfig.get_platform``. Hyphens and periods will be replaced with
+        underscores.
+    """
+    if platform.system() != "Android" and (api_level is None or abi is None):
+        raise TypeError(
+            "on non-Android platforms, the api_level and abi arguments are required"
+        )
+
+    if api_level is None:
+        # Python 3.13 was the first version to return platform.system() == "Android",
+        # and also the first version to define platform.android_ver().
+        api_level = platform.android_ver().api_level  # type: ignore[attr-defined]
+
+    if abi is None:
+        abi = sysconfig.get_platform().split("-")[-1]
+    abi = _normalize_string(abi)
+
+    # 16 is the minimum API level known to have enough features to support CPython
+    # without major patching. Yield every API level from the maximum down to the
+    # minimum, inclusive.
+    min_api_level = 16
+    for ver in range(api_level, min_api_level - 1, -1):
+        yield f"android_{ver}_{abi}"
+
+
+def _linux_platforms(is_32bit: bool = _32_BIT_INTERPRETER) -> Iterator[str]:
+    linux = _normalize_string(sysconfig.get_platform())
+    if not linux.startswith("linux_"):
+        # we should never be here, just yield the sysconfig one and return
+        yield linux
+        return
+    if is_32bit:
+        if linux == "linux_x86_64":
+            linux = "linux_i686"
+        elif linux == "linux_aarch64":
+            linux = "linux_armv8l"
+    _, arch = linux.split("_", 1)
+    archs = {"armv8l": ["armv8l", "armv7l"]}.get(arch, [arch])
+    yield from _manylinux.platform_tags(archs)
+    yield from _musllinux.platform_tags(archs)
+    for arch in archs:
+        yield f"linux_{arch}"
+
+
+def _generic_platforms() -> Iterator[str]:
+    yield _normalize_string(sysconfig.get_platform())
+
+
+def platform_tags() -> Iterator[str]:
+    """
+    Provides the platform tags for this installation.
+    """
+    if platform.system() == "Darwin":
+        return mac_platforms()
+    elif platform.system() == "iOS":
+        return ios_platforms()
+    elif platform.system() == "Android":
+        return android_platforms()
+    elif platform.system() == "Linux":
+        return _linux_platforms()
+    else:
+        return _generic_platforms()
+
+
+def interpreter_name() -> str:
+    """
+    Returns the name of the running interpreter.
+
+    Some implementations have a reserved, two-letter abbreviation which will
+    be returned when appropriate.
+    """
+    name = sys.implementation.name
+    return INTERPRETER_SHORT_NAMES.get(name) or name
+
+
+def interpreter_version(*, warn: bool = False) -> str:
+    """
+    Returns the version of the running interpreter.
+    """
+    version = _get_config_var("py_version_nodot", warn=warn)
+    return str(version) if version else _version_nodot(sys.version_info[:2])
+
+
+def _version_nodot(version: PythonVersion) -> str:
+    return "".join(map(str, version))
+
+
+def sys_tags(*, warn: bool = False) -> Iterator[Tag]:
+    """
+    Returns the sequence of tag triples for the running interpreter.
+
+    The order of the sequence corresponds to priority order for the
+    interpreter, from most to least important.
+    """
+
+    interp_name = interpreter_name()
+    if interp_name == "cp":
+        yield from cpython_tags(warn=warn)
+    else:
+        yield from generic_tags()
+
+    if interp_name == "pp":
+        interp = "pp3"
+    elif interp_name == "cp":
+        interp = "cp" + interpreter_version(warn=warn)
+    else:
+        interp = None
+    yield from compatible_tags(interpreter=interp)