Add files using upload-large-folder tool

python/Lib/site-packages/setuptools/config/_validate_pyproject/NOTICE

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+The code contained in this directory was automatically generated using the
+following command:
+
+    python -m validate_pyproject.pre_compile --output-dir=setuptools/config/_validate_pyproject --enable-plugins setuptools distutils --very-verbose -t distutils=setuptools/config/distutils.schema.json -t setuptools=setuptools/config/setuptools.schema.json
+
+Please avoid changing it manually.
+
+
+You can report issues or suggest changes directly to `validate-pyproject`
+(or to the relevant plugin repository)
+
+- https://github.com/abravalheri/validate-pyproject/issues
+
+
+***
+
+The following files include code from opensource projects
+(either as direct copies or modified versions):
+
+- `fastjsonschema_exceptions.py`:
+    - project: `fastjsonschema` - licensed under BSD-3-Clause
+      (https://github.com/horejsek/python-fastjsonschema)
+- `extra_validations.py` and `format.py`, `error_reporting.py`:
+    - project: `validate-pyproject` - licensed under MPL-2.0
+      (https://github.com/abravalheri/validate-pyproject)
+
+
+Additionally the following files are automatically generated by tools provided
+by the same projects:
+
+- `__init__.py`
+- `fastjsonschema_validations.py`
+
+The relevant copyright notes and licenses are included below.
+
+
+***
+
+`fastjsonschema`
+================
+
+Copyright (c) 2018, Michal Horejsek
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+  Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+  Redistributions in binary form must reproduce the above copyright notice, this
+  list of conditions and the following disclaimer in the documentation and/or
+  other materials provided with the distribution.
+
+  Neither the name of the {organization} nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+
+***
+
+`validate-pyproject`
+====================
+
+Mozilla Public License, version 2.0
+
+1. Definitions
+
+1.1. "Contributor"
+
+     means each individual or legal entity that creates, contributes to the
+     creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+
+     means the combination of the Contributions of others (if any) used by a
+     Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+
+     means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+
+     means Source Code Form to which the initial Contributor has attached the
+     notice in Exhibit A, the Executable Form of such Source Code Form, and
+     Modifications of such Source Code Form, in each case including portions
+     thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+     means
+
+     a. that the initial Contributor has attached the notice described in
+        Exhibit B to the Covered Software; or
+
+     b. that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the terms of
+        a Secondary License.
+
+1.6. "Executable Form"
+
+     means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+
+     means a work that combines Covered Software with other material, in a
+     separate file or files, that is not Covered Software.
+
+1.8. "License"
+
+     means this document.
+
+1.9. "Licensable"
+
+     means having the right to grant, to the maximum extent possible, whether
+     at the time of the initial grant or subsequently, any and all of the
+     rights conveyed by this License.
+
+1.10. "Modifications"
+
+     means any of the following:
+
+     a. any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered Software; or
+
+     b. any new file in Source Code Form that contains any Covered Software.
+
+1.11. "Patent Claims" of a Contributor
+
+      means any patent claim(s), including without limitation, method,
+      process, and apparatus claims, in any patent Licensable by such
+      Contributor that would be infringed, but for the grant of the License,
+      by the making, using, selling, offering for sale, having made, import,
+      or transfer of either its Contributions or its Contributor Version.
+
+1.12. "Secondary License"
+
+      means either the GNU General Public License, Version 2.0, the GNU Lesser
+      General Public License, Version 2.1, the GNU Affero General Public
+      License, Version 3.0, or any later versions of those licenses.
+
+1.13. "Source Code Form"
+
+      means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+
+      means an individual or a legal entity exercising rights under this
+      License. For legal entities, "You" includes any entity that controls, is
+      controlled by, or is under common control with You. For purposes of this
+      definition, "control" means (a) the power, direct or indirect, to cause
+      the direction or management of such entity, whether by contract or
+      otherwise, or (b) ownership of more than fifty percent (50%) of the
+      outstanding shares or beneficial ownership of such entity.
+
+
+2. License Grants and Conditions
+
+2.1. Grants
+
+     Each Contributor hereby grants You a world-wide, royalty-free,
+     non-exclusive license:
+
+     a. under intellectual property rights (other than patent or trademark)
+        Licensable by such Contributor to use, reproduce, make available,
+        modify, display, perform, distribute, and otherwise exploit its
+        Contributions, either on an unmodified basis, with Modifications, or
+        as part of a Larger Work; and
+
+     b. under Patent Claims of such Contributor to make, use, sell, offer for
+        sale, have made, import, and otherwise transfer either its
+        Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+     The licenses granted in Section 2.1 with respect to any Contribution
+     become effective for each Contribution on the date the Contributor first
+     distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+     The licenses granted in this Section 2 are the only rights granted under
+     this License. No additional rights or licenses will be implied from the
+     distribution or licensing of Covered Software under this License.
+     Notwithstanding Section 2.1(b) above, no patent license is granted by a
+     Contributor:
+
+     a. for any code that a Contributor has removed from Covered Software; or
+
+     b. for infringements caused by: (i) Your and any other third party's
+        modifications of Covered Software, or (ii) the combination of its
+        Contributions with other software (except as part of its Contributor
+        Version); or
+
+     c. under Patent Claims infringed by Covered Software in the absence of
+        its Contributions.
+
+     This License does not grant any rights in the trademarks, service marks,
+     or logos of any Contributor (except as may be necessary to comply with
+     the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+     No Contributor makes additional grants as a result of Your choice to
+     distribute the Covered Software under a subsequent version of this
+     License (see Section 10.2) or under the terms of a Secondary License (if
+     permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+     Each Contributor represents that the Contributor believes its
+     Contributions are its original creation(s) or it has sufficient rights to
+     grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+     This License is not intended to limit any rights You have under
+     applicable copyright doctrines of fair use, fair dealing, or other
+     equivalents.
+
+2.7. Conditions
+
+     Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
+     Section 2.1.
+
+
+3. Responsibilities
+
+3.1. Distribution of Source Form
+
+     All distribution of Covered Software in Source Code Form, including any
+     Modifications that You create or to which You contribute, must be under
+     the terms of this License. You must inform recipients that the Source
+     Code Form of the Covered Software is governed by the terms of this
+     License, and how they can obtain a copy of this License. You may not
+     attempt to alter or restrict the recipients' rights in the Source Code
+     Form.
+
+3.2. Distribution of Executable Form
+
+     If You distribute Covered Software in Executable Form then:
+
+     a. such Covered Software must also be made available in Source Code Form,
+        as described in Section 3.1, and You must inform recipients of the
+        Executable Form how they can obtain a copy of such Source Code Form by
+        reasonable means in a timely manner, at a charge no more than the cost
+        of distribution to the recipient; and
+
+     b. You may distribute such Executable Form under the terms of this
+        License, or sublicense it under different terms, provided that the
+        license for the Executable Form does not attempt to limit or alter the
+        recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+     You may create and distribute a Larger Work under terms of Your choice,
+     provided that You also comply with the requirements of this License for
+     the Covered Software. If the Larger Work is a combination of Covered
+     Software with a work governed by one or more Secondary Licenses, and the
+     Covered Software is not Incompatible With Secondary Licenses, this
+     License permits You to additionally distribute such Covered Software
+     under the terms of such Secondary License(s), so that the recipient of
+     the Larger Work may, at their option, further distribute the Covered
+     Software under the terms of either this License or such Secondary
+     License(s).
+
+3.4. Notices
+
+     You may not remove or alter the substance of any license notices
+     (including copyright notices, patent notices, disclaimers of warranty, or
+     limitations of liability) contained within the Source Code Form of the
+     Covered Software, except that You may alter any license notices to the
+     extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+     You may choose to offer, and to charge a fee for, warranty, support,
+     indemnity or liability obligations to one or more recipients of Covered
+     Software. However, You may do so only on Your own behalf, and not on
+     behalf of any Contributor. You must make it absolutely clear that any
+     such warranty, support, indemnity, or liability obligation is offered by
+     You alone, and You hereby agree to indemnify every Contributor for any
+     liability incurred by such Contributor as a result of warranty, support,
+     indemnity or liability terms You offer. You may include additional
+     disclaimers of warranty and limitations of liability specific to any
+     jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+
+   If it is impossible for You to comply with any of the terms of this License
+   with respect to some or all of the Covered Software due to statute,
+   judicial order, or regulation then You must: (a) comply with the terms of
+   this License to the maximum extent possible; and (b) describe the
+   limitations and the code they affect. Such description must be placed in a
+   text file included with all distributions of the Covered Software under
+   this License. Except to the extent prohibited by statute or regulation,
+   such description must be sufficiently detailed for a recipient of ordinary
+   skill to be able to understand it.
+
+5. Termination
+
+5.1. The rights granted under this License will terminate automatically if You
+     fail to comply with any of its terms. However, if You become compliant,
+     then the rights granted under this License from a particular Contributor
+     are reinstated (a) provisionally, unless and until such Contributor
+     explicitly and finally terminates Your grants, and (b) on an ongoing
+     basis, if such Contributor fails to notify You of the non-compliance by
+     some reasonable means prior to 60 days after You have come back into
+     compliance. Moreover, Your grants from a particular Contributor are
+     reinstated on an ongoing basis if such Contributor notifies You of the
+     non-compliance by some reasonable means, this is the first time You have
+     received notice of non-compliance with this License from such
+     Contributor, and You become compliant prior to 30 days after Your receipt
+     of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+     infringement claim (excluding declaratory judgment actions,
+     counter-claims, and cross-claims) alleging that a Contributor Version
+     directly or indirectly infringes any patent, then the rights granted to
+     You by any and all Contributors for the Covered Software under Section
+     2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
+     license agreements (excluding distributors and resellers) which have been
+     validly granted by You or Your distributors under this License prior to
+     termination shall survive termination.
+
+6. Disclaimer of Warranty
+
+   Covered Software is provided under this License on an "as is" basis,
+   without warranty of any kind, either expressed, implied, or statutory,
+   including, without limitation, warranties that the Covered Software is free
+   of defects, merchantable, fit for a particular purpose or non-infringing.
+   The entire risk as to the quality and performance of the Covered Software
+   is with You. Should any Covered Software prove defective in any respect,
+   You (not any Contributor) assume the cost of any necessary servicing,
+   repair, or correction. This disclaimer of warranty constitutes an essential
+   part of this License. No use of  any Covered Software is authorized under
+   this License except under this disclaimer.
+
+7. Limitation of Liability
+
+   Under no circumstances and under no legal theory, whether tort (including
+   negligence), contract, or otherwise, shall any Contributor, or anyone who
+   distributes Covered Software as permitted above, be liable to You for any
+   direct, indirect, special, incidental, or consequential damages of any
+   character including, without limitation, damages for lost profits, loss of
+   goodwill, work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses, even if such party shall have been
+   informed of the possibility of such damages. This limitation of liability
+   shall not apply to liability for death or personal injury resulting from
+   such party's negligence to the extent applicable law prohibits such
+   limitation. Some jurisdictions do not allow the exclusion or limitation of
+   incidental or consequential damages, so this exclusion and limitation may
+   not apply to You.
+
+8. Litigation
+
+   Any litigation relating to this License may be brought only in the courts
+   of a jurisdiction where the defendant maintains its principal place of
+   business and such litigation shall be governed by laws of that
+   jurisdiction, without reference to its conflict-of-law provisions. Nothing
+   in this Section shall prevent a party's ability to bring cross-claims or
+   counter-claims.
+
+9. Miscellaneous
+
+   This License represents the complete agreement concerning the subject
+   matter hereof. If any provision of this License is held to be
+   unenforceable, such provision shall be reformed only to the extent
+   necessary to make it enforceable. Any law or regulation which provides that
+   the language of a contract shall be construed against the drafter shall not
+   be used to construe this License against a Contributor.
+
+
+10. Versions of the License
+
+10.1. New Versions
+
+      Mozilla Foundation is the license steward. Except as provided in Section
+      10.3, no one other than the license steward has the right to modify or
+      publish new versions of this License. Each version will be given a
+      distinguishing version number.
+
+10.2. Effect of New Versions
+
+      You may distribute the Covered Software under the terms of the version
+      of the License under which You originally received the Covered Software,
+      or under the terms of any subsequent version published by the license
+      steward.
+
+10.3. Modified Versions
+
+      If you create software not governed by this License, and you want to
+      create a new license for such software, you may create and use a
+      modified version of this License if you rename the license and remove
+      any references to the name of the license steward (except to note that
+      such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+      Licenses If You choose to distribute Source Code Form that is
+      Incompatible With Secondary Licenses under the terms of this version of
+      the License, the notice described in Exhibit B of this License must be
+      attached.
+
+Exhibit A - Source Code Form License Notice
+
+      This Source Code Form is subject to the
+      terms of the Mozilla Public License, v.
+      2.0. If a copy of the MPL was not
+      distributed with this file, You can
+      obtain one at
+      https://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular file,
+then You may include the notice in a location (such as a LICENSE file in a
+relevant directory) where a recipient would be likely to look for such a
+notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+
+      This Source Code Form is "Incompatible
+      With Secondary Licenses", as defined by
+      the Mozilla Public License, v. 2.0.

python/Lib/site-packages/setuptools/config/_validate_pyproject/__init__.py

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+from functools import reduce
+from typing import Any, Callable, Dict
+
+from . import formats
+from .error_reporting import detailed_errors, ValidationError
+from .extra_validations import EXTRA_VALIDATIONS
+from .fastjsonschema_exceptions import JsonSchemaException, JsonSchemaValueException
+from .fastjsonschema_validations import validate as _validate
+
+__all__ = [
+    "validate",
+    "FORMAT_FUNCTIONS",
+    "EXTRA_VALIDATIONS",
+    "ValidationError",
+    "JsonSchemaException",
+    "JsonSchemaValueException",
+]
+
+
+FORMAT_FUNCTIONS: Dict[str, Callable[[str], bool]] = {
+    fn.__name__.replace("_", "-"): fn
+    for fn in formats.__dict__.values()
+    if callable(fn) and not fn.__name__.startswith("_")
+}
+
+
+def validate(data: Any) -> bool:
+    """Validate the given ``data`` object using JSON Schema
+    This function raises ``ValidationError`` if ``data`` is invalid.
+    """
+    with detailed_errors():
+        _validate(data, custom_formats=FORMAT_FUNCTIONS)
+        reduce(lambda acc, fn: fn(acc), EXTRA_VALIDATIONS, data)
+    return True

python/Lib/site-packages/setuptools/config/_validate_pyproject/error_reporting.py

@@ -0,0 +1,338 @@
+from __future__ import annotations
+
+import io
+import json
+import logging
+import os
+import re
+import typing
+from contextlib import contextmanager
+from textwrap import indent, wrap
+from typing import Any, Generator, Iterator, Sequence
+
+from .fastjsonschema_exceptions import JsonSchemaValueException
+
+if typing.TYPE_CHECKING:
+    import sys
+
+    if sys.version_info < (3, 11):
+        from typing_extensions import Self
+    else:
+        from typing import Self
+
+_logger = logging.getLogger(__name__)
+
+_MESSAGE_REPLACEMENTS = {
+    "must be named by propertyName definition": "keys must be named by",
+    "one of contains definition": "at least one item that matches",
+    " same as const definition:": "",
+    "only specified items": "only items matching the definition",
+}
+
+_SKIP_DETAILS = (
+    "must not be empty",
+    "is always invalid",
+    "must not be there",
+)
+
+_NEED_DETAILS = {"anyOf", "oneOf", "allOf", "contains", "propertyNames", "not", "items"}
+
+_CAMEL_CASE_SPLITTER = re.compile(r"\W+|([A-Z][^A-Z\W]*)")
+_IDENTIFIER = re.compile(r"^[\w_]+$", re.IGNORECASE)
+
+_TOML_JARGON = {
+    "object": "table",
+    "property": "key",
+    "properties": "keys",
+    "property names": "keys",
+}
+
+_FORMATS_HELP = """
+For more details about `format` see
+https://validate-pyproject.readthedocs.io/en/latest/api/validate_pyproject.formats.html
+"""
+
+
+class ValidationError(JsonSchemaValueException):
+    """Report violations of a given JSON schema.
+
+    This class extends :exc:`~fastjsonschema.JsonSchemaValueException`
+    by adding the following properties:
+
+    - ``summary``: an improved version of the ``JsonSchemaValueException`` error message
+      with only the necessary information)
+
+    - ``details``: more contextual information about the error like the failing schema
+      itself and the value that violates the schema.
+
+    Depending on the level of the verbosity of the ``logging`` configuration
+    the exception message will be only ``summary`` (default) or a combination of
+    ``summary`` and ``details`` (when the logging level is set to :obj:`logging.DEBUG`).
+    """
+
+    summary = ""
+    details = ""
+    _original_message = ""
+
+    @classmethod
+    def _from_jsonschema(cls, ex: JsonSchemaValueException) -> Self:
+        formatter = _ErrorFormatting(ex)
+        obj = cls(str(formatter), ex.value, formatter.name, ex.definition, ex.rule)
+        debug_code = os.getenv("JSONSCHEMA_DEBUG_CODE_GENERATION", "false").lower()
+        if debug_code != "false":  # pragma: no cover
+            obj.__cause__, obj.__traceback__ = ex.__cause__, ex.__traceback__
+        obj._original_message = ex.message
+        obj.summary = formatter.summary
+        obj.details = formatter.details
+        return obj
+
+
+@contextmanager
+def detailed_errors() -> Generator[None, None, None]:
+    try:
+        yield
+    except JsonSchemaValueException as ex:
+        raise ValidationError._from_jsonschema(ex) from None
+
+
+class _ErrorFormatting:
+    def __init__(self, ex: JsonSchemaValueException):
+        self.ex = ex
+        self.name = f"`{self._simplify_name(ex.name)}`"
+        self._original_message: str = self.ex.message.replace(ex.name, self.name)
+        self._summary = ""
+        self._details = ""
+
+    def __str__(self) -> str:
+        if _logger.getEffectiveLevel() <= logging.DEBUG and self.details:
+            return f"{self.summary}\n\n{self.details}"
+
+        return self.summary
+
+    @property
+    def summary(self) -> str:
+        if not self._summary:
+            self._summary = self._expand_summary()
+
+        return self._summary
+
+    @property
+    def details(self) -> str:
+        if not self._details:
+            self._details = self._expand_details()
+
+        return self._details
+
+    @staticmethod
+    def _simplify_name(name: str) -> str:
+        x = len("data.")
+        return name[x:] if name.startswith("data.") else name
+
+    def _expand_summary(self) -> str:
+        msg = self._original_message
+
+        for bad, repl in _MESSAGE_REPLACEMENTS.items():
+            msg = msg.replace(bad, repl)
+
+        if any(substring in msg for substring in _SKIP_DETAILS):
+            return msg
+
+        schema = self.ex.rule_definition
+        if self.ex.rule in _NEED_DETAILS and schema:
+            summary = _SummaryWriter(_TOML_JARGON)
+            return f"{msg}:\n\n{indent(summary(schema), '    ')}"
+
+        return msg
+
+    def _expand_details(self) -> str:
+        optional = []
+        definition = self.ex.definition or {}
+        desc_lines = definition.pop("$$description", [])
+        desc = definition.pop("description", None) or " ".join(desc_lines)
+        if desc:
+            description = "\n".join(
+                wrap(
+                    desc,
+                    width=80,
+                    initial_indent="    ",
+                    subsequent_indent="    ",
+                    break_long_words=False,
+                )
+            )
+            optional.append(f"DESCRIPTION:\n{description}")
+        schema = json.dumps(definition, indent=4)
+        value = json.dumps(self.ex.value, indent=4)
+        defaults = [
+            f"GIVEN VALUE:\n{indent(value, '    ')}",
+            f"OFFENDING RULE: {self.ex.rule!r}",
+            f"DEFINITION:\n{indent(schema, '    ')}",
+        ]
+        msg = "\n\n".join(optional + defaults)
+        epilog = f"\n{_FORMATS_HELP}" if "format" in msg.lower() else ""
+        return msg + epilog
+
+
+class _SummaryWriter:
+    _IGNORE = frozenset(("description", "default", "title", "examples"))
+
+    def __init__(self, jargon: dict[str, str] | None = None):
+        self.jargon: dict[str, str] = jargon or {}
+        # Clarify confusing terms
+        self._terms = {
+            "anyOf": "at least one of the following",
+            "oneOf": "exactly one of the following",
+            "allOf": "all of the following",
+            "not": "(*NOT* the following)",
+            "prefixItems": f"{self._jargon('items')} (in order)",
+            "items": "items",
+            "contains": "contains at least one of",
+            "propertyNames": (
+                f"non-predefined acceptable {self._jargon('property names')}"
+            ),
+            "patternProperties": f"{self._jargon('properties')} named via pattern",
+            "const": "predefined value",
+            "enum": "one of",
+        }
+        # Attributes that indicate that the definition is easy and can be done
+        # inline (e.g. string and number)
+        self._guess_inline_defs = [
+            "enum",
+            "const",
+            "maxLength",
+            "minLength",
+            "pattern",
+            "format",
+            "minimum",
+            "maximum",
+            "exclusiveMinimum",
+            "exclusiveMaximum",
+            "multipleOf",
+        ]
+
+    def _jargon(self, term: str | list[str]) -> str | list[str]:
+        if isinstance(term, list):
+            return [self.jargon.get(t, t) for t in term]
+        return self.jargon.get(term, term)
+
+    def __call__(
+        self,
+        schema: dict | list[dict],
+        prefix: str = "",
+        *,
+        _path: Sequence[str] = (),
+    ) -> str:
+        if isinstance(schema, list):
+            return self._handle_list(schema, prefix, _path)
+
+        filtered = self._filter_unecessary(schema, _path)
+        simple = self._handle_simple_dict(filtered, _path)
+        if simple:
+            return f"{prefix}{simple}"
+
+        child_prefix = self._child_prefix(prefix, "  ")
+        item_prefix = self._child_prefix(prefix, "- ")
+        indent = len(prefix) * " "
+        with io.StringIO() as buffer:
+            for i, (key, value) in enumerate(filtered.items()):
+                child_path = [*_path, key]
+                line_prefix = prefix if i == 0 else indent
+                buffer.write(f"{line_prefix}{self._label(child_path)}:")
+                # ^  just the first item should receive the complete prefix
+                if isinstance(value, dict):
+                    filtered = self._filter_unecessary(value, child_path)
+                    simple = self._handle_simple_dict(filtered, child_path)
+                    buffer.write(
+                        f" {simple}"
+                        if simple
+                        else f"\n{self(value, child_prefix, _path=child_path)}"
+                    )
+                elif isinstance(value, list) and (
+                    key != "type" or self._is_property(child_path)
+                ):
+                    children = self._handle_list(value, item_prefix, child_path)
+                    sep = " " if children.startswith("[") else "\n"
+                    buffer.write(f"{sep}{children}")
+                else:
+                    buffer.write(f" {self._value(value, child_path)}\n")
+            return buffer.getvalue()
+
+    def _is_unecessary(self, path: Sequence[str]) -> bool:
+        if self._is_property(path) or not path:  # empty path => instruction @ root
+            return False
+        key = path[-1]
+        return any(key.startswith(k) for k in "$_") or key in self._IGNORE
+
+    def _filter_unecessary(
+        self, schema: dict[str, Any], path: Sequence[str]
+    ) -> dict[str, Any]:
+        return {
+            key: value
+            for key, value in schema.items()
+            if not self._is_unecessary([*path, key])
+        }
+
+    def _handle_simple_dict(self, value: dict, path: Sequence[str]) -> str | None:
+        inline = any(p in value for p in self._guess_inline_defs)
+        simple = not any(isinstance(v, (list, dict)) for v in value.values())
+        if inline or simple:
+            return f"{{{', '.join(self._inline_attrs(value, path))}}}\n"
+        return None
+
+    def _handle_list(
+        self, schemas: list, prefix: str = "", path: Sequence[str] = ()
+    ) -> str:
+        if self._is_unecessary(path):
+            return ""
+
+        repr_ = repr(schemas)
+        if all(not isinstance(e, (dict, list)) for e in schemas) and len(repr_) < 60:
+            return f"{repr_}\n"
+
+        item_prefix = self._child_prefix(prefix, "- ")
+        return "".join(
+            self(v, item_prefix, _path=[*path, f"[{i}]"]) for i, v in enumerate(schemas)
+        )
+
+    def _is_property(self, path: Sequence[str]) -> bool:
+        """Check if the given path can correspond to an arbitrarily named property"""
+        counter = 0
+        for key in path[-2::-1]:
+            if key not in {"properties", "patternProperties"}:
+                break
+            counter += 1
+
+        # If the counter if even, the path correspond to a JSON Schema keyword
+        # otherwise it can be any arbitrary string naming a property
+        return counter % 2 == 1
+
+    def _label(self, path: Sequence[str]) -> str:
+        *parents, key = path
+        if not self._is_property(path):
+            norm_key = _separate_terms(key)
+            return self._terms.get(key) or " ".join(self._jargon(norm_key))
+
+        if parents[-1] == "patternProperties":
+            return f"(regex {key!r})"
+        return repr(key)  # property name
+
+    def _value(self, value: Any, path: Sequence[str]) -> str:
+        if path[-1] == "type" and not self._is_property(path):
+            type_ = self._jargon(value)
+            return f"[{', '.join(type_)}]" if isinstance(type_, list) else type_
+        return repr(value)
+
+    def _inline_attrs(self, schema: dict, path: Sequence[str]) -> Iterator[str]:
+        for key, value in schema.items():
+            child_path = [*path, key]
+            yield f"{self._label(child_path)}: {self._value(value, child_path)}"
+
+    def _child_prefix(self, parent_prefix: str, child_prefix: str) -> str:
+        return len(parent_prefix) * " " + child_prefix
+
+
+def _separate_terms(word: str) -> list[str]:
+    """
+    >>> _separate_terms("FooBar-foo")
+    ['foo', 'bar', 'foo']
+    """
+    return [w.lower() for w in _CAMEL_CASE_SPLITTER.split(word) if w]

python/Lib/site-packages/setuptools/config/_validate_pyproject/extra_validations.py

@@ -0,0 +1,151 @@
+"""The purpose of this module is implement PEP 621 validations that are
+difficult to express as a JSON Schema (or that are not supported by the current
+JSON Schema library).
+"""
+
+import collections
+import itertools
+from inspect import cleandoc
+from typing import Generator, Iterable, Mapping, TypeVar
+
+from .error_reporting import ValidationError
+
+T = TypeVar("T", bound=Mapping)
+
+
+class RedefiningStaticFieldAsDynamic(ValidationError):
+    _DESC = """According to PEP 621:
+
+    Build back-ends MUST raise an error if the metadata specifies a field
+    statically as well as being listed in dynamic.
+    """
+    __doc__ = _DESC
+    _URL = (
+        "https://packaging.python.org/en/latest/specifications/pyproject-toml/#dynamic"
+    )
+
+
+class IncludedDependencyGroupMustExist(ValidationError):
+    _DESC = """An included dependency group must exist and must not be cyclic.
+    """
+    __doc__ = _DESC
+    _URL = "https://peps.python.org/pep-0735/"
+
+
+class ImportNameCollision(ValidationError):
+    _DESC = """According to PEP 794:
+
+    All import-names and import-namespaces items must be unique.
+    """
+    __doc__ = _DESC
+    _URL = "https://peps.python.org/pep-0794/"
+
+
+class ImportNameMissing(ValidationError):
+    _DESC = """According to PEP 794:
+
+    An import name must have all parents listed.
+    """
+    __doc__ = _DESC
+    _URL = "https://peps.python.org/pep-0794/"
+
+
+def validate_project_dynamic(pyproject: T) -> T:
+    project_table = pyproject.get("project", {})
+    dynamic = project_table.get("dynamic", [])
+
+    for field in dynamic:
+        if field in project_table:
+            raise RedefiningStaticFieldAsDynamic(
+                message=f"You cannot provide a value for `project.{field}` and "
+                "list it under `project.dynamic` at the same time",
+                value={
+                    field: project_table[field],
+                    "...": " # ...",
+                    "dynamic": dynamic,
+                },
+                name=f"data.project.{field}",
+                definition={
+                    "description": cleandoc(RedefiningStaticFieldAsDynamic._DESC),
+                    "see": RedefiningStaticFieldAsDynamic._URL,
+                },
+                rule="PEP 621",
+            )
+
+    return pyproject
+
+
+def validate_include_depenency(pyproject: T) -> T:
+    dependency_groups = pyproject.get("dependency-groups", {})
+    for key, value in dependency_groups.items():
+        for each in value:
+            if (
+                isinstance(each, dict)
+                and (include_group := each.get("include-group"))
+                and include_group not in dependency_groups
+            ):
+                raise IncludedDependencyGroupMustExist(
+                    message=f"The included dependency group {include_group} doesn't exist",
+                    value=each,
+                    name=f"data.dependency_groups.{key}",
+                    definition={
+                        "description": cleandoc(IncludedDependencyGroupMustExist._DESC),
+                        "see": IncludedDependencyGroupMustExist._URL,
+                    },
+                    rule="PEP 735",
+                )
+    # TODO: check for `include-group` cycles (can be conditional to graphlib)
+    return pyproject
+
+
+def _remove_private(items: Iterable[str]) -> Generator[str, None, None]:
+    for item in items:
+        yield item.partition(";")[0].rstrip()
+
+
+def validate_import_name_issues(pyproject: T) -> T:
+    project = pyproject.get("project", {})
+    import_names = collections.Counter(_remove_private(project.get("import-names", [])))
+    import_namespaces = collections.Counter(
+        _remove_private(project.get("import-namespaces", []))
+    )
+
+    duplicated = [k for k, v in (import_names + import_namespaces).items() if v > 1]
+
+    if duplicated:
+        raise ImportNameCollision(
+            message="Duplicated names are not allowed in import-names/import-namespaces",
+            value=duplicated,
+            name="data.project.importnames(paces)",
+            definition={
+                "description": cleandoc(ImportNameCollision._DESC),
+                "see": ImportNameCollision._URL,
+            },
+            rule="PEP 794",
+        )
+
+    names = frozenset(import_names + import_namespaces)
+    for name in names:
+        for parent in itertools.accumulate(
+            name.split(".")[:-1], lambda a, b: f"{a}.{b}"
+        ):
+            if parent not in names:
+                raise ImportNameMissing(
+                    message="All parents of an import name must also be listed in import-namespace/import-names",
+                    value=name,
+                    name="data.project.importnames(paces)",
+                    definition={
+                        "description": cleandoc(ImportNameMissing._DESC),
+                        "see": ImportNameMissing._URL,
+                    },
+                    rule="PEP 794",
+                )
+
+    return pyproject
+
+
+EXTRA_VALIDATIONS = (
+    validate_project_dynamic,
+    validate_include_depenency,
+    validate_import_name_issues,
+)

python/Lib/site-packages/setuptools/config/_validate_pyproject/fastjsonschema_exceptions.py

@@ -0,0 +1,51 @@
+import re
+
+
+SPLIT_RE = re.compile(r'[\.\[\]]+')
+
+
+class JsonSchemaException(ValueError):
+    """
+    Base exception of ``fastjsonschema`` library.
+    """
+
+
+class JsonSchemaValueException(JsonSchemaException):
+    """
+    Exception raised by validation function. Available properties:
+
+     * ``message`` containing human-readable information what is wrong (e.g. ``data.property[index] must be smaller than or equal to 42``),
+     * invalid ``value`` (e.g. ``60``),
+     * ``name`` of a path in the data structure (e.g. ``data.property[index]``),
+     * ``path`` as an array in the data structure (e.g. ``['data', 'property', 'index']``),
+     * the whole ``definition`` which the ``value`` has to fulfil (e.g. ``{'type': 'number', 'maximum': 42}``),
+     * ``rule`` which the ``value`` is breaking (e.g. ``maximum``)
+     * and ``rule_definition`` (e.g. ``42``).
+
+    .. versionchanged:: 2.14.0
+        Added all extra properties.
+    """
+
+    def __init__(self, message, value=None, name=None, definition=None, rule=None):
+        super().__init__(message)
+        self.message = message
+        self.value = value
+        self.name = name
+        self.definition = definition
+        self.rule = rule
+
+    @property
+    def path(self):
+        return [item for item in SPLIT_RE.split(self.name) if item != '']
+
+    @property
+    def rule_definition(self):
+        if not self.rule or not self.definition:
+            return None
+        return self.definition.get(self.rule)
+
+
+class JsonSchemaDefinitionException(JsonSchemaException):
+    """
+    Exception raised by generator of validation function.
+    """

python/Lib/site-packages/setuptools/config/_validate_pyproject/formats.py

@@ -0,0 +1,464 @@
+"""
+The functions in this module are used to validate schemas with the
+`format JSON Schema keyword
+<https://json-schema.org/understanding-json-schema/reference/string#format>`_.
+
+The correspondence is given by replacing the ``_`` character in the name of the
+function with a ``-`` to obtain the format name and vice versa.
+"""
+
+from __future__ import annotations
+
+import keyword
+import logging
+import os
+import re
+import string
+import typing
+from itertools import chain as _chain
+
+if typing.TYPE_CHECKING:
+    import builtins
+
+    from typing_extensions import Literal
+
+_logger = logging.getLogger(__name__)
+
+# -------------------------------------------------------------------------------------
+# PEP 440
+
+VERSION_PATTERN = r"""
+    v?
+    (?:
+        (?:(?P<epoch>[0-9]+)!)?                           # epoch
+        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
+        (?P<pre>                                          # pre-release
+            [-_\.]?
+            (?P<pre_l>alpha|a|beta|b|preview|pre|c|rc)
+            [-_\.]?
+            (?P<pre_n>[0-9]+)?
+        )?
+        (?P<post>                                         # post release
+            (?:-(?P<post_n1>[0-9]+))
+            |
+            (?:
+                [-_\.]?
+                (?P<post_l>post|rev|r)
+                [-_\.]?
+                (?P<post_n2>[0-9]+)?
+            )
+        )?
+        (?P<dev>                                          # dev release
+            [-_\.]?
+            (?P<dev_l>dev)
+            [-_\.]?
+            (?P<dev_n>[0-9]+)?
+        )?
+    )
+    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
+"""
+
+VERSION_REGEX = re.compile(
+    r"^\s*" + VERSION_PATTERN + r"\s*$", re.VERBOSE | re.IGNORECASE
+)
+
+
+def pep440(version: str) -> bool:
+    """See :ref:`PyPA's version specification <pypa:version-specifiers>`
+    (initially introduced in :pep:`440`).
+    """
+    return VERSION_REGEX.match(version) is not None
+
+
+# -------------------------------------------------------------------------------------
+# PEP 508
+
+PEP508_IDENTIFIER_PATTERN = r"([A-Z0-9]|[A-Z0-9][A-Z0-9._-]*[A-Z0-9])"
+PEP508_IDENTIFIER_REGEX = re.compile(f"^{PEP508_IDENTIFIER_PATTERN}$", re.IGNORECASE)
+
+
+def pep508_identifier(name: str) -> bool:
+    """See :ref:`PyPA's name specification <pypa:name-format>`
+    (initially introduced in :pep:`508#names`).
+    """
+    return PEP508_IDENTIFIER_REGEX.match(name) is not None
+
+
+try:
+    try:
+        from packaging import requirements as _req
+    except ImportError:  # pragma: no cover
+        # let's try setuptools vendored version
+        from setuptools._vendor.packaging import (  # type: ignore[no-redef]
+            requirements as _req,
+        )
+
+    def pep508(value: str) -> bool:
+        """See :ref:`PyPA's dependency specifiers <pypa:dependency-specifiers>`
+        (initially introduced in :pep:`508`).
+        """
+        try:
+            _req.Requirement(value)
+        except _req.InvalidRequirement:
+            return False
+        return True
+
+except ImportError:  # pragma: no cover
+    _logger.warning(
+        "Could not find an installation of `packaging`. Requirements, dependencies and "
+        "versions might not be validated. "
+        "To enforce validation, please install `packaging`."
+    )
+
+    def pep508(value: str) -> bool:  # noqa: ARG001
+        return True
+
+
+def pep508_versionspec(value: str) -> bool:
+    """Expression that can be used to specify/lock versions (including ranges)
+    See ``versionspec`` in :ref:`PyPA's dependency specifiers
+    <pypa:dependency-specifiers>` (initially introduced in :pep:`508`).
+    """
+    if any(c in value for c in (";", "]", "@")):
+        # In PEP 508:
+        # conditional markers, extras and URL specs are not included in the
+        # versionspec
+        return False
+    # Let's pretend we have a dependency called `requirement` with the given
+    # version spec, then we can reuse the pep508 function for validation:
+    return pep508(f"requirement{value}")
+
+
+# -------------------------------------------------------------------------------------
+# PEP 517
+
+
+def pep517_backend_reference(value: str) -> bool:
+    """See PyPA's specification for defining build-backend references
+    introduced in :pep:`517#source-trees`.
+
+    This is similar to an entry-point reference (e.g., ``package.module:object``).
+    """
+    module, _, obj = value.partition(":")
+    identifiers = (i.strip() for i in _chain(module.split("."), obj.split(".")))
+    return all(python_identifier(i) for i in identifiers if i)
+
+
+# -------------------------------------------------------------------------------------
+# Classifiers - PEP 301
+
+
+def _download_classifiers() -> str:
+    import ssl
+    from email.message import Message
+    from urllib.request import urlopen
+
+    url = "https://pypi.org/pypi?:action=list_classifiers"
+    context = ssl.create_default_context()
+    with urlopen(url, context=context) as response:  # noqa: S310 (audit URLs)
+        headers = Message()
+        headers["content_type"] = response.getheader("content-type", "text/plain")
+        return response.read().decode(headers.get_param("charset", "utf-8"))  # type: ignore[no-any-return]
+
+
+class _TroveClassifier:
+    """The ``trove_classifiers`` package is the official way of validating classifiers,
+    however this package might not be always available.
+    As a workaround we can still download a list from PyPI.
+    We also don't want to be over strict about it, so simply skipping silently is an
+    option (classifiers will be validated anyway during the upload to PyPI).
+    """
+
+    downloaded: None | Literal[False] | set[str]
+    """
+    None => not cached yet
+    False => unavailable
+    set => cached values
+    """
+
+    def __init__(self) -> None:
+        self.downloaded = None
+        self._skip_download = False
+        self.__name__ = "trove_classifier"  # Emulate a public function
+
+    def _disable_download(self) -> None:
+        # This is a private API. Only setuptools has the consent of using it.
+        self._skip_download = True
+
+    def __call__(self, value: str) -> bool:
+        if self.downloaded is False or self._skip_download is True:
+            return True
+
+        if os.getenv("NO_NETWORK") or os.getenv("VALIDATE_PYPROJECT_NO_NETWORK"):
+            self.downloaded = False
+            msg = (
+                "Install ``trove-classifiers`` to ensure proper validation. "
+                "Skipping download of classifiers list from PyPI (NO_NETWORK)."
+            )
+            _logger.debug(msg)
+            return True
+
+        if self.downloaded is None:
+            msg = (
+                "Install ``trove-classifiers`` to ensure proper validation. "
+                "Meanwhile a list of classifiers will be downloaded from PyPI."
+            )
+            _logger.debug(msg)
+            try:
+                self.downloaded = set(_download_classifiers().splitlines())
+            except Exception:  # noqa: BLE001
+                self.downloaded = False
+                _logger.debug("Problem with download, skipping validation")
+                return True
+
+        return value in self.downloaded or value.lower().startswith("private ::")
+
+
+try:
+    from trove_classifiers import classifiers as _trove_classifiers
+
+    def trove_classifier(value: str) -> bool:
+        """See https://pypi.org/classifiers/"""
+        return value in _trove_classifiers or value.lower().startswith("private ::")
+
+except ImportError:  # pragma: no cover
+    trove_classifier = _TroveClassifier()
+
+
+# -------------------------------------------------------------------------------------
+# Stub packages - PEP 561
+
+
+def pep561_stub_name(value: str) -> bool:
+    """Name of a directory containing type stubs.
+    It must follow the name scheme ``<package>-stubs`` as defined in
+    :pep:`561#stub-only-packages`.
+    """
+    top, *children = value.split(".")
+    if not top.endswith("-stubs"):
+        return False
+    return python_module_name(".".join([top[: -len("-stubs")], *children]))
+
+
+# -------------------------------------------------------------------------------------
+# Non-PEP related
+
+
+def url(value: str) -> bool:
+    """Valid URL (validation uses :obj:`urllib.parse`).
+    For maximum compatibility please make sure to include a ``scheme`` prefix
+    in your URL (e.g. ``http://``).
+    """
+    from urllib.parse import urlparse
+
+    try:
+        parts = urlparse(value)
+        if not parts.scheme:
+            _logger.warning(
+                "For maximum compatibility please make sure to include a "
+                "`scheme` prefix in your URL (e.g. 'http://'). "
+                f"Given value: {value}"
+            )
+            if not (value.startswith(("/", "\\")) or "@" in value):
+                parts = urlparse(f"http://{value}")
+
+        return bool(parts.scheme and parts.netloc)
+    except Exception:  # noqa: BLE001
+        return False
+
+
+# https://packaging.python.org/specifications/entry-points/
+ENTRYPOINT_PATTERN = r"[^\[\s=]([^=]*[^\s=])?"
+ENTRYPOINT_REGEX = re.compile(f"^{ENTRYPOINT_PATTERN}$", re.IGNORECASE)
+RECOMMEDED_ENTRYPOINT_PATTERN = r"[\w.-]+"
+RECOMMEDED_ENTRYPOINT_REGEX = re.compile(
+    f"^{RECOMMEDED_ENTRYPOINT_PATTERN}$", re.IGNORECASE
+)
+ENTRYPOINT_GROUP_PATTERN = r"\w+(\.\w+)*"
+ENTRYPOINT_GROUP_REGEX = re.compile(f"^{ENTRYPOINT_GROUP_PATTERN}$", re.IGNORECASE)
+
+
+def python_identifier(value: str) -> bool:
+    """Can be used as identifier in Python.
+    (Validation uses :obj:`str.isidentifier`).
+    """
+    return value.isidentifier()
+
+
+def python_qualified_identifier(value: str) -> bool:
+    """
+    Python "dotted identifier", i.e. a sequence of :obj:`python_identifier`
+    concatenated with ``"."`` (e.g.: ``package.module.submodule``).
+    """
+    if value.startswith(".") or value.endswith("."):
+        return False
+    return all(python_identifier(m) for m in value.split("."))
+
+
+def python_module_name(value: str) -> bool:
+    """Module name that can be used in an ``import``-statement in Python.
+    See :obj:`python_qualified_identifier`.
+    """
+    return python_qualified_identifier(value)
+
+
+def python_module_name_relaxed(value: str) -> bool:
+    """Similar to :obj:`python_module_name`, but relaxed to also accept
+    dash characters (``-``) and cover special cases like ``pip-run``.
+
+    It is recommended, however, that beginners avoid dash characters,
+    as they require advanced knowledge about Python internals.
+
+    The following are disallowed:
+
+    * names starting/ending in dashes,
+    * names ending in ``-stubs`` (potentially collide with :obj:`pep561_stub_name`).
+    """
+    if value.startswith("-") or value.endswith("-"):
+        return False
+    if value.endswith("-stubs"):
+        return False  # Avoid collision with PEP 561
+    return python_module_name(value.replace("-", "_"))
+
+
+def python_entrypoint_group(value: str) -> bool:
+    """See ``Data model > group`` in the :ref:`PyPA's entry-points specification
+    <pypa:entry-points>`.
+    """
+    return ENTRYPOINT_GROUP_REGEX.match(value) is not None
+
+
+def python_entrypoint_name(value: str) -> bool:
+    """See ``Data model > name`` in the :ref:`PyPA's entry-points specification
+    <pypa:entry-points>`.
+    """
+    if not ENTRYPOINT_REGEX.match(value):
+        return False
+    if not RECOMMEDED_ENTRYPOINT_REGEX.match(value):
+        msg = f"Entry point `{value}` does not follow recommended pattern: "
+        msg += RECOMMEDED_ENTRYPOINT_PATTERN
+        _logger.warning(msg)
+    return True
+
+
+def python_entrypoint_reference(value: str) -> bool:
+    """Reference to a Python object using in the format::
+
+        importable.module:object.attr
+
+    See ``Data model >object reference`` in the :ref:`PyPA's entry-points specification
+    <pypa:entry-points>`.
+    """
+    module, _, rest = value.partition(":")
+    if "[" in rest:
+        obj, _, extras_ = rest.partition("[")
+        if extras_.strip()[-1] != "]":
+            return False
+        extras = (x.strip() for x in extras_.strip(string.whitespace + "[]").split(","))
+        if not all(pep508_identifier(e) for e in extras):
+            return False
+        _logger.warning(f"`{value}` - using extras for entry points is not recommended")
+    else:
+        obj = rest
+
+    module_parts = module.split(".")
+    identifiers = _chain(module_parts, obj.split(".")) if rest else iter(module_parts)
+    return all(python_identifier(i.strip()) for i in identifiers)
+
+
+def uint8(value: builtins.int) -> bool:
+    r"""Unsigned 8-bit integer (:math:`0 \leq x < 2^8`)"""
+    return 0 <= value < 2**8
+
+
+def uint16(value: builtins.int) -> bool:
+    r"""Unsigned 16-bit integer (:math:`0 \leq x < 2^{16}`)"""
+    return 0 <= value < 2**16
+
+
+def uint32(value: builtins.int) -> bool:
+    r"""Unsigned 32-bit integer (:math:`0 \leq x < 2^{32}`)"""
+    return 0 <= value < 2**32
+
+
+def uint64(value: builtins.int) -> bool:
+    r"""Unsigned 64-bit integer (:math:`0 \leq x < 2^{64}`)"""
+    return 0 <= value < 2**64
+
+
+def uint(value: builtins.int) -> bool:
+    r"""Signed 64-bit integer (:math:`0 \leq x < 2^{64}`)"""
+    return 0 <= value < 2**64
+
+
+def int8(value: builtins.int) -> bool:
+    r"""Signed 8-bit integer (:math:`-2^{7} \leq x < 2^{7}`)"""
+    return -(2**7) <= value < 2**7
+
+
+def int16(value: builtins.int) -> bool:
+    r"""Signed 16-bit integer (:math:`-2^{15} \leq x < 2^{15}`)"""
+    return -(2**15) <= value < 2**15
+
+
+def int32(value: builtins.int) -> bool:
+    r"""Signed 32-bit integer (:math:`-2^{31} \leq x < 2^{31}`)"""
+    return -(2**31) <= value < 2**31
+
+
+def int64(value: builtins.int) -> bool:
+    r"""Signed 64-bit integer (:math:`-2^{63} \leq x < 2^{63}`)"""
+    return -(2**63) <= value < 2**63
+
+
+def int(value: builtins.int) -> bool:
+    r"""Signed 64-bit integer (:math:`-2^{63} \leq x < 2^{63}`)"""
+    return -(2**63) <= value < 2**63
+
+
+try:
+    from packaging import licenses as _licenses
+
+    def SPDX(value: str) -> bool:
+        """See :ref:`PyPA's License-Expression specification
+        <pypa:core-metadata-license-expression>` (added in :pep:`639`).
+        """
+        try:
+            _licenses.canonicalize_license_expression(value)
+        except _licenses.InvalidLicenseExpression:
+            return False
+        return True
+
+except ImportError:  # pragma: no cover
+    _logger.warning(
+        "Could not find an up-to-date installation of `packaging`. "
+        "License expressions might not be validated. "
+        "To enforce validation, please install `packaging>=24.2`."
+    )
+
+    def SPDX(value: str) -> bool:  # noqa: ARG001
+        return True
+
+
+VALID_IMPORT_NAME = re.compile(
+    r"""
+    ^                                  # start of string
+        [A-Za-z_][A-Za-z_0-9]+         # a valid Python identifier
+        (?:\.[A-Za-z_][A-Za-z_0-9]*)*  # optionally followed by .identifier's
+    (?:\s*;\s*private)?                # optionally followed by ; private
+    $                                  # end of string
+    """,
+    re.VERBOSE,
+)
+
+
+def import_name(value: str) -> bool:
+    """This is a valid import name. It has to be series of python identifiers
+    (not keywords), separated by dots, optionally followed by a semicolon and
+    the keyword "private".
+    """
+    if VALID_IMPORT_NAME.match(value) is None:
+        return False
+
+    idents, _, _ = value.partition(";")
+    return all(not keyword.iskeyword(ident) for ident in idents.rstrip().split("."))