1 files changed, 386 insertions, 0 deletions
diff --git a/third_party/python/setuptools/setuptools/config/_apply_pyprojecttoml.py b/third_party/python/setuptools/setuptools/config/_apply_pyprojecttoml.py
new file mode 100644
index 0000000000..3091e3b5e3
--- /dev/null
+++ b/third_party/python/setuptools/setuptools/config/_apply_pyprojecttoml.py
@@ -0,0 +1,386 @@
+"""Translation layer between pyproject config and setuptools distribution and
+metadata objects.
+
+The distribution and metadata objects are modeled after (an old version of)
+core metadata, therefore configs in the format specified for ``pyproject.toml``
+need to be processed before being applied.
+
+**PRIVATE MODULE**: API reserved for setuptools internal usage only.
+"""
+import logging
+import os
+from collections.abc import Mapping
+from email.headerregistry import Address
+from functools import partial, reduce
+from itertools import chain
+from types import MappingProxyType
+from typing import (TYPE_CHECKING, Any, Callable, Dict, List, Optional, Set, Tuple,
+                    Type, Union, cast)
+
+from ..warnings import SetuptoolsWarning, SetuptoolsDeprecationWarning
+
+if TYPE_CHECKING:
+    from setuptools._importlib import metadata  # noqa
+    from setuptools.dist import Distribution  # noqa
+
+EMPTY: Mapping = MappingProxyType({})  # Immutable dict-like
+_Path = Union[os.PathLike, str]
+_DictOrStr = Union[dict, str]
+_CorrespFn = Callable[["Distribution", Any, _Path], None]
+_Correspondence = Union[str, _CorrespFn]
+
+_logger = logging.getLogger(__name__)
+
+
+def apply(dist: "Distribution", config: dict, filename: _Path) -> "Distribution":
+    """Apply configuration dict read with :func:`read_configuration`"""
+
+    if not config:
+        return dist  # short-circuit unrelated pyproject.toml file
+
+    root_dir = os.path.dirname(filename) or "."
+
+    _apply_project_table(dist, config, root_dir)
+    _apply_tool_table(dist, config, filename)
+
+    current_directory = os.getcwd()
+    os.chdir(root_dir)
+    try:
+        dist._finalize_requires()
+        dist._finalize_license_files()
+    finally:
+        os.chdir(current_directory)
+
+    return dist
+
+
+def _apply_project_table(dist: "Distribution", config: dict, root_dir: _Path):
+    project_table = config.get("project", {}).copy()
+    if not project_table:
+        return  # short-circuit
+
+    _handle_missing_dynamic(dist, project_table)
+    _unify_entry_points(project_table)
+
+    for field, value in project_table.items():
+        norm_key = json_compatible_key(field)
+        corresp = PYPROJECT_CORRESPONDENCE.get(norm_key, norm_key)
+        if callable(corresp):
+            corresp(dist, value, root_dir)
+        else:
+            _set_config(dist, corresp, value)
+
+
+def _apply_tool_table(dist: "Distribution", config: dict, filename: _Path):
+    tool_table = config.get("tool", {}).get("setuptools", {})
+    if not tool_table:
+        return  # short-circuit
+
+    for field, value in tool_table.items():
+        norm_key = json_compatible_key(field)
+
+        if norm_key in TOOL_TABLE_DEPRECATIONS:
+            suggestion, kwargs = TOOL_TABLE_DEPRECATIONS[norm_key]
+            msg = f"The parameter `{norm_key}` is deprecated, {suggestion}"
+            SetuptoolsDeprecationWarning.emit(
+                "Deprecated config", msg, **kwargs  # type: ignore
+            )
+
+        norm_key = TOOL_TABLE_RENAMES.get(norm_key, norm_key)
+        _set_config(dist, norm_key, value)
+
+    _copy_command_options(config, dist, filename)
+
+
+def _handle_missing_dynamic(dist: "Distribution", project_table: dict):
+    """Be temporarily forgiving with ``dynamic`` fields not listed in ``dynamic``"""
+    # TODO: Set fields back to `None` once the feature stabilizes
+    dynamic = set(project_table.get("dynamic", []))
+    for field, getter in _PREVIOUSLY_DEFINED.items():
+        if not (field in project_table or field in dynamic):
+            value = getter(dist)
+            if value:
+                _WouldIgnoreField.emit(field=field, value=value)
+
+
+def json_compatible_key(key: str) -> str:
+    """As defined in :pep:`566#json-compatible-metadata`"""
+    return key.lower().replace("-", "_")
+
+
+def _set_config(dist: "Distribution", field: str, value: Any):
+    setter = getattr(dist.metadata, f"set_{field}", None)
+    if setter:
+        setter(value)
+    elif hasattr(dist.metadata, field) or field in SETUPTOOLS_PATCHES:
+        setattr(dist.metadata, field, value)
+    else:
+        setattr(dist, field, value)
+
+
+_CONTENT_TYPES = {
+    ".md": "text/markdown",
+    ".rst": "text/x-rst",
+    ".txt": "text/plain",
+}
+
+
+def _guess_content_type(file: str) -> Optional[str]:
+    _, ext = os.path.splitext(file.lower())
+    if not ext:
+        return None
+
+    if ext in _CONTENT_TYPES:
+        return _CONTENT_TYPES[ext]
+
+    valid = ", ".join(f"{k} ({v})" for k, v in _CONTENT_TYPES.items())
+    msg = f"only the following file extensions are recognized: {valid}."
+    raise ValueError(f"Undefined content type for {file}, {msg}")
+
+
+def _long_description(dist: "Distribution", val: _DictOrStr, root_dir: _Path):
+    from setuptools.config import expand
+
+    if isinstance(val, str):
+        file: Union[str, list] = val
+        text = expand.read_files(file, root_dir)
+        ctype = _guess_content_type(val)
+    else:
+        file = val.get("file") or []
+        text = val.get("text") or expand.read_files(file, root_dir)
+        ctype = val["content-type"]
+
+    _set_config(dist, "long_description", text)
+
+    if ctype:
+        _set_config(dist, "long_description_content_type", ctype)
+
+    if file:
+        dist._referenced_files.add(cast(str, file))
+
+
+def _license(dist: "Distribution", val: dict, root_dir: _Path):
+    from setuptools.config import expand
+
+    if "file" in val:
+        _set_config(dist, "license", expand.read_files([val["file"]], root_dir))
+        dist._referenced_files.add(val["file"])
+    else:
+        _set_config(dist, "license", val["text"])
+
+
+def _people(dist: "Distribution", val: List[dict], _root_dir: _Path, kind: str):
+    field = []
+    email_field = []
+    for person in val:
+        if "name" not in person:
+            email_field.append(person["email"])
+        elif "email" not in person:
+            field.append(person["name"])
+        else:
+            addr = Address(display_name=person["name"], addr_spec=person["email"])
+            email_field.append(str(addr))
+
+    if field:
+        _set_config(dist, kind, ", ".join(field))
+    if email_field:
+        _set_config(dist, f"{kind}_email", ", ".join(email_field))
+
+
+def _project_urls(dist: "Distribution", val: dict, _root_dir):
+    _set_config(dist, "project_urls", val)
+
+
+def _python_requires(dist: "Distribution", val: dict, _root_dir):
+    from setuptools.extern.packaging.specifiers import SpecifierSet
+
+    _set_config(dist, "python_requires", SpecifierSet(val))
+
+
+def _dependencies(dist: "Distribution", val: list, _root_dir):
+    if getattr(dist, "install_requires", []):
+        msg = "`install_requires` overwritten in `pyproject.toml` (dependencies)"
+        SetuptoolsWarning.emit(msg)
+    _set_config(dist, "install_requires", val)
+
+
+def _optional_dependencies(dist: "Distribution", val: dict, _root_dir):
+    existing = getattr(dist, "extras_require", {})
+    _set_config(dist, "extras_require", {**existing, **val})
+
+
+def _unify_entry_points(project_table: dict):
+    project = project_table
+    entry_points = project.pop("entry-points", project.pop("entry_points", {}))
+    renaming = {"scripts": "console_scripts", "gui_scripts": "gui_scripts"}
+    for key, value in list(project.items()):  # eager to allow modifications
+        norm_key = json_compatible_key(key)
+        if norm_key in renaming and value:
+            entry_points[renaming[norm_key]] = project.pop(key)
+
+    if entry_points:
+        project["entry-points"] = {
+            name: [f"{k} = {v}" for k, v in group.items()]
+            for name, group in entry_points.items()
+        }
+
+
+def _copy_command_options(pyproject: dict, dist: "Distribution", filename: _Path):
+    tool_table = pyproject.get("tool", {})
+    cmdclass = tool_table.get("setuptools", {}).get("cmdclass", {})
+    valid_options = _valid_command_options(cmdclass)
+
+    cmd_opts = dist.command_options
+    for cmd, config in pyproject.get("tool", {}).get("distutils", {}).items():
+        cmd = json_compatible_key(cmd)
+        valid = valid_options.get(cmd, set())
+        cmd_opts.setdefault(cmd, {})
+        for key, value in config.items():
+            key = json_compatible_key(key)
+            cmd_opts[cmd][key] = (str(filename), value)
+            if key not in valid:
+                # To avoid removing options that are specified dynamically we
+                # just log a warn...
+                _logger.warning(f"Command option {cmd}.{key} is not defined")
+
+
+def _valid_command_options(cmdclass: Mapping = EMPTY) -> Dict[str, Set[str]]:
+    from .._importlib import metadata
+    from setuptools.dist import Distribution
+
+    valid_options = {"global": _normalise_cmd_options(Distribution.global_options)}
+
+    unloaded_entry_points = metadata.entry_points(group='distutils.commands')
+    loaded_entry_points = (_load_ep(ep) for ep in unloaded_entry_points)
+    entry_points = (ep for ep in loaded_entry_points if ep)
+    for cmd, cmd_class in chain(entry_points, cmdclass.items()):
+        opts = valid_options.get(cmd, set())
+        opts = opts | _normalise_cmd_options(getattr(cmd_class, "user_options", []))
+        valid_options[cmd] = opts
+
+    return valid_options
+
+
+def _load_ep(ep: "metadata.EntryPoint") -> Optional[Tuple[str, Type]]:
+    # Ignore all the errors
+    try:
+        return (ep.name, ep.load())
+    except Exception as ex:
+        msg = f"{ex.__class__.__name__} while trying to load entry-point {ep.name}"
+        _logger.warning(f"{msg}: {ex}")
+        return None
+
+
+def _normalise_cmd_option_key(name: str) -> str:
+    return json_compatible_key(name).strip("_=")
+
+
+def _normalise_cmd_options(desc: List[Tuple[str, Optional[str], str]]) -> Set[str]:
+    return {_normalise_cmd_option_key(fancy_option[0]) for fancy_option in desc}
+
+
+def _get_previous_entrypoints(dist: "Distribution") -> Dict[str, list]:
+    ignore = ("console_scripts", "gui_scripts")
+    value = getattr(dist, "entry_points", None) or {}
+    return {k: v for k, v in value.items() if k not in ignore}
+
+
+def _attrgetter(attr):
+    """
+    Similar to ``operator.attrgetter`` but returns None if ``attr`` is not found
+    >>> from types import SimpleNamespace
+    >>> obj = SimpleNamespace(a=42, b=SimpleNamespace(c=13))
+    >>> _attrgetter("a")(obj)
+    42
+    >>> _attrgetter("b.c")(obj)
+    13
+    >>> _attrgetter("d")(obj) is None
+    True
+    """
+    return partial(reduce, lambda acc, x: getattr(acc, x, None), attr.split("."))
+
+
+def _some_attrgetter(*items):
+    """
+    Return the first "truth-y" attribute or None
+    >>> from types import SimpleNamespace
+    >>> obj = SimpleNamespace(a=42, b=SimpleNamespace(c=13))
+    >>> _some_attrgetter("d", "a", "b.c")(obj)
+    42
+    >>> _some_attrgetter("d", "e", "b.c", "a")(obj)
+    13
+    >>> _some_attrgetter("d", "e", "f")(obj) is None
+    True
+    """
+    def _acessor(obj):
+        values = (_attrgetter(i)(obj) for i in items)
+        return next((i for i in values if i is not None), None)
+    return _acessor
+
+
+PYPROJECT_CORRESPONDENCE: Dict[str, _Correspondence] = {
+    "readme": _long_description,
+    "license": _license,
+    "authors": partial(_people, kind="author"),
+    "maintainers": partial(_people, kind="maintainer"),
+    "urls": _project_urls,
+    "dependencies": _dependencies,
+    "optional_dependencies": _optional_dependencies,
+    "requires_python": _python_requires,
+}
+
+TOOL_TABLE_RENAMES = {"script_files": "scripts"}
+TOOL_TABLE_DEPRECATIONS = {
+    "namespace_packages": (
+        "consider using implicit namespaces instead (PEP 420).",
+        {"due_date": (2023, 10, 30)},  # warning introduced in May 2022
+    )
+}
+
+SETUPTOOLS_PATCHES = {"long_description_content_type", "project_urls",
+                      "provides_extras", "license_file", "license_files"}
+
+_PREVIOUSLY_DEFINED = {
+    "name": _attrgetter("metadata.name"),
+    "version": _attrgetter("metadata.version"),
+    "description": _attrgetter("metadata.description"),
+    "readme": _attrgetter("metadata.long_description"),
+    "requires-python": _some_attrgetter("python_requires", "metadata.python_requires"),
+    "license": _attrgetter("metadata.license"),
+    "authors": _some_attrgetter("metadata.author", "metadata.author_email"),
+    "maintainers": _some_attrgetter("metadata.maintainer", "metadata.maintainer_email"),
+    "keywords": _attrgetter("metadata.keywords"),
+    "classifiers": _attrgetter("metadata.classifiers"),
+    "urls": _attrgetter("metadata.project_urls"),
+    "entry-points": _get_previous_entrypoints,
+    "dependencies": _some_attrgetter("_orig_install_requires", "install_requires"),
+    "optional-dependencies": _some_attrgetter("_orig_extras_require", "extras_require"),
+}
+
+
+class _WouldIgnoreField(SetuptoolsDeprecationWarning):
+    _SUMMARY = "`{field}` defined outside of `pyproject.toml` would be ignored."
+
+    _DETAILS = """
+    ##########################################################################
+    # configuration would be ignored/result in error due to `pyproject.toml` #
+    ##########################################################################
+
+    The following seems to be defined outside of `pyproject.toml`:
+
+    `{field} = {value!r}`
+
+    According to the spec (see the link below), however, setuptools CANNOT
+    consider this value unless `{field}` is listed as `dynamic`.
+
+    https://packaging.python.org/en/latest/specifications/declaring-project-metadata/
+
+    For the time being, `setuptools` will still consider the given value (as a
+    **transitional** measure), but please note that future releases of setuptools will
+    follow strictly the standard.
+
+    To prevent this warning, you can list `{field}` under `dynamic` or alternatively
+    remove the `[project]` table from your file and rely entirely on other means of
+    configuration.
+    """
+    _DUE_DATE = (2023, 10, 30)  # Initially introduced in 27 May 2022