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setupcfg.py

"""
Load setuptools configuration from ``setup.cfg`` files.

**API will be made private in the future**

To read project metadata, consider using
``build.util.project_wheel_metadata`` (https://pypi.org/project/build/).
For simple scenarios, you can also try parsing the file directly
with the help of ``configparser``.
"""
import contextlib
import functools
import os
from collections import defaultdict
from functools import partial
from functools import wraps
from typing import (
    TYPE_CHECKING,
    Callable,
    Any,
    Dict,
    Generic,
    Iterable,
    List,
    Optional,
    Set,
    Tuple,
    TypeVar,
    Union,
)

from ..errors import FileError, OptionError
from ..extern.packaging.markers import default_environment as marker_env
from ..extern.packaging.requirements import InvalidRequirement, Requirement
from ..extern.packaging.specifiers import SpecifierSet
from ..extern.packaging.version import InvalidVersion, Version
from ..warnings import SetuptoolsDeprecationWarning
from . import expand

if TYPE_CHECKING:
    from distutils.dist import DistributionMetadata  # noqa

from setuptools.dist import Distribution  # noqa

_Path = Union[str, os.PathLike]
SingleCommandOptions = Dict["str", Tuple["str", Any]]
"""Dict that associate the name of the options of a particular command to a
tuple. The first element of the tuple indicates the origin of the option value
(e.g. the name of the configuration file where it was read from),
while the second element of the tuple is the option value itself
"""
AllCommandOptions = Dict["str", SingleCommandOptions]  # cmd name => its options
Target = TypeVar("Target", bound=Union["Distribution", "DistributionMetadata"])

def read_configuration(
    filepath: _Path, find_others=False, ignore_option_errors=False
) -> dict:
    """Read given configuration file and returns options from it as a dict.

:param str|unicode filepath: Path to configuration file
        to get options from.

:param bool find_others: Whether to search for other configuration files
        which could be on in various places.

:param bool ignore_option_errors: Whether to silently ignore
        options, values of which could not be resolved (e.g. due to exceptions
        in directives such as file:, attr:, etc.).
        If False exceptions are propagated as expected.

:rtype: dict
    """
    from setuptools.dist import Distribution

dist = Distribution()
    filenames = dist.find_config_files() if find_others else []
    handlers = _apply(dist, filepath, filenames, ignore_option_errors)
    return configuration_to_dict(handlers)

def apply_configuration(dist: "Distribution", filepath: _Path) -> "Distribution":
    """Apply the configuration from a ``setup.cfg`` file into an existing
    distribution object.
    """
    _apply(dist, filepath)
    dist._finalize_requires()
    return dist

def _apply(
    dist: "Distribution",
    filepath: _Path,
    other_files: Iterable[_Path] = (),
    ignore_option_errors: bool = False,
) -> Tuple["ConfigHandler", ...]:
    """Read configuration from ``filepath`` and applies to the ``dist`` object."""
    from setuptools.dist import _Distribution

filepath = os.path.abspath(filepath)

if not os.path.isfile(filepath):
        raise FileError(f'Configuration file {filepath} does not exist.')

current_directory = os.getcwd()
    os.chdir(os.path.dirname(filepath))
    filenames = [*other_files, filepath]

try:
        _Distribution.parse_config_files(dist, filenames=filenames)
        handlers = parse_configuration(
            dist, dist.command_options, ignore_option_errors=ignore_option_errors
        )
        dist._finalize_license_files()
    finally:
        os.chdir(current_directory)

return handlers

def _get_option(target_obj: Target, key: str):
    """
    Given a target object and option key, get that option from
    the target object, either through a get_{key} method or
    from an attribute directly.
    """
    getter_name = f'get_{key}'
    by_attribute = functools.partial(getattr, target_obj, key)
    getter = getattr(target_obj, getter_name, by_attribute)
    return getter()

def configuration_to_dict(handlers: Tuple["ConfigHandler", ...]) -> dict:
    """Returns configuration data gathered by given handlers as a dict.

:param list[ConfigHandler] handlers: Handlers list,
        usually from parse_configuration()

:rtype: dict
    """
    config_dict: dict = defaultdict(dict)

for handler in handlers:
        for option in handler.set_options:
            value = _get_option(handler.target_obj, option)
            config_dict[handler.section_prefix][option] = value

return config_dict

def parse_configuration(
    distribution: "Distribution",
    command_options: AllCommandOptions,
    ignore_option_errors=False,
) -> Tuple["ConfigMetadataHandler", "ConfigOptionsHandler"]:
    """Performs additional parsing of configuration options
    for a distribution.

Returns a list of used option handlers.

:param Distribution distribution:
    :param dict command_options:
    :param bool ignore_option_errors: Whether to silently ignore
        options, values of which could not be resolved (e.g. due to exceptions
        in directives such as file:, attr:, etc.).
        If False exceptions are propagated as expected.
    :rtype: list
    """
    with expand.EnsurePackagesDiscovered(distribution) as ensure_discovered:
        options = ConfigOptionsHandler(
            distribution,
            command_options,
            ignore_option_errors,
            ensure_discovered,
        )

options.parse()
        if not distribution.package_dir:
            distribution.package_dir = options.package_dir  # Filled by `find_packages`

meta = ConfigMetadataHandler(
            distribution.metadata,
            command_options,
            ignore_option_errors,
            ensure_discovered,
            distribution.package_dir,
            distribution.src_root,
        )
        meta.parse()
        distribution._referenced_files.update(
            options._referenced_files, meta._referenced_files
        )

return meta, options

def _warn_accidental_env_marker_misconfig(label: str, orig_value: str, parsed: list):
    """Because users sometimes misinterpret this configuration:

[options.extras_require]
    foo = bar;python_version<"4"

It looks like one requirement with an environment marker
    but because there is no newline, it's parsed as two requirements
    with a semicolon as separator.

Therefore, if:
        * input string does not contain a newline AND
        * parsed result contains two requirements AND
        * parsing of the two parts from the result ("<first>;<second>")
        leads in a valid Requirement with a valid marker
    a UserWarning is shown to inform the user about the possible problem.
    """
    if "\n" in orig_value or len(parsed) != 2:
        return

markers = marker_env().keys()

try:
        req = Requirement(parsed[1])
        if req.name in markers:
            _AmbiguousMarker.emit(field=label, req=parsed[1])
    except InvalidRequirement as ex:
        if any(parsed[1].startswith(marker) for marker in markers):
            msg = _AmbiguousMarker.message(field=label, req=parsed[1])
            raise InvalidRequirement(msg) from ex

class ConfigHandler(Generic[Target]):
    """Handles metadata supplied in configuration files."""

section_prefix: str
    """Prefix for config sections handled by this handler.
    Must be provided by class heirs.

"""

aliases: Dict[str, str] = {}
    """Options aliases.
    For compatibility with various packages. E.g.: d2to1 and pbr.
    Note: `-` in keys is replaced with `_` by config parser.

"""

def __init__(
        self,
        target_obj: Target,
        options: AllCommandOptions,
        ignore_option_errors,
        ensure_discovered: expand.EnsurePackagesDiscovered,
    ):
        self.ignore_option_errors = ignore_option_errors
        self.target_obj = target_obj
        self.sections = dict(self._section_options(options))
        self.set_options: List[str] = []
        self.ensure_discovered = ensure_discovered
        self._referenced_files: Set[str] = set()
        """After parsing configurations, this property will enumerate
        all files referenced by the "file:" directive. Private API for setuptools only.
        """

@classmethod
    def _section_options(cls, options: AllCommandOptions):
        for full_name, value in options.items():
            pre, sep, name = full_name.partition(cls.section_prefix)
            if pre:
                continue
            yield name.lstrip('.'), value

@property
    def parsers(self):
        """Metadata item name to parser function mapping."""
        raise NotImplementedError(
            '%s must provide .parsers property' % self.__class__.__name__
        )

def __setitem__(self, option_name, value):
        target_obj = self.target_obj

# Translate alias into real name.
        option_name = self.aliases.get(option_name, option_name)

try:
            current_value = getattr(target_obj, option_name)
        except AttributeError:
            raise KeyError(option_name)

if current_value:
            # Already inhabited. Skipping.
            return

try:
            parsed = self.parsers.get(option_name, lambda x: x)(value)
        except (Exception,) * self.ignore_option_errors:
            return

simple_setter = functools.partial(target_obj.__setattr__, option_name)
        setter = getattr(target_obj, 'set_%s' % option_name, simple_setter)
        setter(parsed)

self.set_options.append(option_name)

@classmethod
    def _parse_list(cls, value, separator=','):
        """Represents value as a list.

Value is split either by separator (defaults to comma) or by lines.

:param value:
        :param separator: List items separator character.
        :rtype: list
        """
        if isinstance(value, list):  # _get_parser_compound case
            return value

if '\n' in value:
            value = value.splitlines()
        else:
            value = value.split(separator)

return [chunk.strip() for chunk in value if chunk.strip()]

@classmethod
    def _parse_dict(cls, value):
        """Represents value as a dict.

:param value:
        :rtype: dict
        """
        separator = '='
        result = {}
        for line in cls._parse_list(value):
            key, sep, val = line.partition(separator)
            if sep != separator:
                raise OptionError(f"Unable to parse option value to dict: {value}")
            result[key.strip()] = val.strip()

return result

@classmethod
    def _parse_bool(cls, value):
        """Represents value as boolean.

:param value:
        :rtype: bool
        """
        value = value.lower()
        return value in ('1', 'true', 'yes')

@classmethod
    def _exclude_files_parser(cls, key):
        """Returns a parser function to make sure field inputs
        are not files.

Parses a value after getting the key so error messages are
        more informative.

:param key:
        :rtype: callable
        """

def parser(value):
            exclude_directive = 'file:'
            if value.startswith(exclude_directive):
                raise ValueError(
                    'Only strings are accepted for the {0} field, '
                    'files are not accepted'.format(key)
                )
            return value

return parser

def _parse_file(self, value, root_dir: _Path):
        """Represents value as a string, allowing including text
        from nearest files using `file:` directive.

Directive is sandboxed and won't reach anything outside
        directory with setup.py.

Examples:
            file: README.rst, CHANGELOG.md, src/file.txt

:param str value:
        :rtype: str
        """
        include_directive = 'file:'

if not isinstance(value, str):
            return value

if not value.startswith(include_directive):
            return value

spec = value[len(include_directive) :]
        filepaths = [path.strip() for path in spec.split(',')]
        self._referenced_files.update(filepaths)
        return expand.read_files(filepaths, root_dir)

def _parse_attr(self, value, package_dir, root_dir: _Path):
        """Represents value as a module attribute.

Examples:
            attr: package.attr
            attr: package.module.attr

:param str value:
        :rtype: str
        """
        attr_directive = 'attr:'
        if not value.startswith(attr_directive):
            return value

attr_desc = value.replace(attr_directive, '')

# Make sure package_dir is populated correctly, so `attr:` directives can work
        package_dir.update(self.ensure_discovered.package_dir)
        return expand.read_attr(attr_desc, package_dir, root_dir)

@classmethod
    def _get_parser_compound(cls, *parse_methods):
        """Returns parser function to represents value as a list.

Parses a value applying given methods one after another.

:param parse_methods:
        :rtype: callable
        """

def parse(value):
            parsed = value

for method in parse_methods:
                parsed = method(parsed)

return parsed

return parse

@classmethod
    def _parse_section_to_dict_with_key(cls, section_options, values_parser):
        """Parses section options into a dictionary.

Applies a given parser to each option in a section.

:param dict section_options:
        :param callable values_parser: function with 2 args corresponding to key, value
        :rtype: dict
        """
        value = {}
        for key, (_, val) in section_options.items():
            value[key] = values_parser(key, val)
        return value

@classmethod
    def _parse_section_to_dict(cls, section_options, values_parser=None):
        """Parses section options into a dictionary.

Optionally applies a given parser to each value.

:param dict section_options:
        :param callable values_parser: function with 1 arg corresponding to option value
        :rtype: dict
        """
        parser = (lambda _, v: values_parser(v)) if values_parser else (lambda _, v: v)
        return cls._parse_section_to_dict_with_key(section_options, parser)

def parse_section(self, section_options):
        """Parses configuration file section.

:param dict section_options:
        """
        for name, (_, value) in section_options.items():
            with contextlib.suppress(KeyError):
                # Keep silent for a new option may appear anytime.
                self[name] = value

def parse(self):
        """Parses configuration file items from one
        or more related sections.

"""
        for section_name, section_options in self.sections.items():
            method_postfix = ''
            if section_name:  # [section.option] variant
                method_postfix = '_%s' % section_name

section_parser_method: Optional[Callable] = getattr(
                self,
                # Dots in section names are translated into dunderscores.
                ('parse_section%s' % method_postfix).replace('.', '__'),
                None,
            )

if section_parser_method is None:
                raise OptionError(
                    "Unsupported distribution option section: "
                    f"[{self.section_prefix}.{section_name}]"
                )

section_parser_method(section_options)

def _deprecated_config_handler(self, func, msg, **kw):
        """this function will wrap around parameters that are deprecated

:param msg: deprecation message
        :param func: function to be wrapped around
        """

@wraps(func)
        def config_handler(*args, **kwargs):
            kw.setdefault("stacklevel", 2)
            _DeprecatedConfig.emit("Deprecated config in `setup.cfg`", msg, **kw)
            return func(*args, **kwargs)

return config_handler

class ConfigMetadataHandler(ConfigHandler["DistributionMetadata"]):
    section_prefix = 'metadata'

aliases = {
        'home_page': 'url',
        'summary': 'description',
        'classifier': 'classifiers',
        'platform': 'platforms',
    }

strict_mode = False
    """We need to keep it loose, to be partially compatible with
    `pbr` and `d2to1` packages which also uses `metadata` section.

"""

def __init__(
        self,
        target_obj: "DistributionMetadata",
        options: AllCommandOptions,
        ignore_option_errors: bool,
        ensure_discovered: expand.EnsurePackagesDiscovered,
        package_dir: Optional[dict] = None,
        root_dir: _Path = os.curdir,
    ):
        super().__init__(target_obj, options, ignore_option_errors, ensure_discovered)
        self.package_dir = package_dir
        self.root_dir = root_dir

@property
    def parsers(self):
        """Metadata item name to parser function mapping."""
        parse_list = self._parse_list
        parse_file = partial(self._parse_file, root_dir=self.root_dir)
        parse_dict = self._parse_dict
        exclude_files_parser = self._exclude_files_parser

return {
            'platforms': parse_list,
            'keywords': parse_list,
            'provides': parse_list,
            'obsoletes': parse_list,
            'classifiers': self._get_parser_compound(parse_file, parse_list),
            'license': exclude_files_parser('license'),
            'license_files': parse_list,
            'description': parse_file,
            'long_description': parse_file,
            'version': self._parse_version,
            'project_urls': parse_dict,
        }

def _parse_version(self, value):
        """Parses `version` option value.

:param value:
        :rtype: str

"""
        version = self._parse_file(value, self.root_dir)

if version != value:
            version = version.strip()
            # Be strict about versions loaded from file because it's easy to
            # accidentally include newlines and other unintended content
            try:
                Version(version)
            except InvalidVersion:
                raise OptionError(
                    f'Version loaded from {value} does not '
                    f'comply with PEP 440: {version}'
                )

return version

return expand.version(self._parse_attr(value, self.package_dir, self.root_dir))

class ConfigOptionsHandler(ConfigHandler["Distribution"]):
    section_prefix = 'options'

def __init__(
        self,
        target_obj: "Distribution",
        options: AllCommandOptions,
        ignore_option_errors: bool,
        ensure_discovered: expand.EnsurePackagesDiscovered,
    ):
        super().__init__(target_obj, options, ignore_option_errors, ensure_discovered)
        self.root_dir = target_obj.src_root
        self.package_dir: Dict[str, str] = {}  # To be filled by `find_packages`

@classmethod
    def _parse_list_semicolon(cls, value):
        return cls._parse_list(value, separator=';')

def _parse_file_in_root(self, value):
        return self._parse_file(value, root_dir=self.root_dir)

def _parse_requirements_list(self, label: str, value: str):
        # Parse a requirements list, either by reading in a `file:`, or a list.
        parsed = self._parse_list_semicolon(self._parse_file_in_root(value))
        _warn_accidental_env_marker_misconfig(label, value, parsed)
        # Filter it to only include lines that are not comments. `parse_list`
        # will have stripped each line and filtered out empties.
        return [line for line in parsed if not line.startswith("#")]

@property
    def parsers(self):
        """Metadata item name to parser function mapping."""
        parse_list = self._parse_list
        parse_bool = self._parse_bool
        parse_dict = self._parse_dict
        parse_cmdclass = self._parse_cmdclass

return {
            'zip_safe': parse_bool,
            'include_package_data': parse_bool,
            'package_dir': parse_dict,
            'scripts': parse_list,
            'eager_resources': parse_list,
            'dependency_links': parse_list,
            'namespace_packages': self._deprecated_config_handler(
                parse_list,
                "The namespace_packages parameter is deprecated, "
                "consider using implicit namespaces instead (PEP 420).",
                # TODO: define due date, see setuptools.dist:check_nsp.
            ),
            'install_requires': partial(
                self._parse_requirements_list, "install_requires"
            ),
            'setup_requires': self._parse_list_semicolon,
            'tests_require': self._parse_list_semicolon,
            'packages': self._parse_packages,
            'entry_points': self._parse_file_in_root,
            'py_modules': parse_list,
            'python_requires': SpecifierSet,
            'cmdclass': parse_cmdclass,
        }

def _parse_cmdclass(self, value):
        package_dir = self.ensure_discovered.package_dir
        return expand.cmdclass(self._parse_dict(value), package_dir, self.root_dir)

def _parse_packages(self, value):
        """Parses `packages` option value.

:param value:
        :rtype: list
        """
        find_directives = ['find:', 'find_namespace:']
        trimmed_value = value.strip()

if trimmed_value not in find_directives:
            return self._parse_list(value)

# Read function arguments from a dedicated section.
        find_kwargs = self.parse_section_packages__find(
            self.sections.get('packages.find', {})
        )

find_kwargs.update(
            namespaces=(trimmed_value == find_directives[1]),
            root_dir=self.root_dir,
            fill_package_dir=self.package_dir,
        )

return expand.find_packages(**find_kwargs)

def parse_section_packages__find(self, section_options):
        """Parses `packages.find` configuration file section.

To be used in conjunction with _parse_packages().

:param dict section_options:
        """
        section_data = self._parse_section_to_dict(section_options, self._parse_list)

valid_keys = ['where', 'include', 'exclude']

find_kwargs = dict(
            [(k, v) for k, v in section_data.items() if k in valid_keys and v]
        )

where = find_kwargs.get('where')
        if where is not None:
            find_kwargs['where'] = where[0]  # cast list to single val

return find_kwargs

def parse_section_entry_points(self, section_options):
        """Parses `entry_points` configuration file section.

:param dict section_options:
        """
        parsed = self._parse_section_to_dict(section_options, self._parse_list)
        self['entry_points'] = parsed

def _parse_package_data(self, section_options):
        package_data = self._parse_section_to_dict(section_options, self._parse_list)
        return expand.canonic_package_data(package_data)

def parse_section_package_data(self, section_options):
        """Parses `package_data` configuration file section.

:param dict section_options:
        """
        self['package_data'] = self._parse_package_data(section_options)

def parse_section_exclude_package_data(self, section_options):
        """Parses `exclude_package_data` configuration file section.

:param dict section_options:
        """
        self['exclude_package_data'] = self._parse_package_data(section_options)

def parse_section_extras_require(self, section_options):
        """Parses `extras_require` configuration file section.

:param dict section_options:
        """
        parsed = self._parse_section_to_dict_with_key(
            section_options,
            lambda k, v: self._parse_requirements_list(f"extras_require[{k}]", v),
        )

self['extras_require'] = parsed

def parse_section_data_files(self, section_options):
        """Parses `data_files` configuration file section.

:param dict section_options:
        """
        parsed = self._parse_section_to_dict(section_options, self._parse_list)
        self['data_files'] = expand.canonic_data_files(parsed, self.root_dir)

class _AmbiguousMarker(SetuptoolsDeprecationWarning):
    _SUMMARY = "Ambiguous requirement marker."
    _DETAILS = """
    One of the parsed requirements in `{field}` looks like a valid environment marker:

{req!r}

Please make sure that the configuration file is correct.
    You can use dangling lines to avoid this problem.
    """
    _SEE_DOCS = "userguide/declarative_config.html#opt-2"
    # TODO: should we include due_date here? Initially introduced in 6 Aug 2022.
    # Does this make sense with latest version of packaging?

@classmethod
    def message(cls, **kw):
        docs = f"https://setuptools.pypa.io/en/latest/{cls._SEE_DOCS}"
        return cls._format(cls._SUMMARY, cls._DETAILS, see_url=docs, format_args=kw)

class _DeprecatedConfig(SetuptoolsDeprecationWarning):
    _SEE_DOCS = "userguide/declarative_config.html"

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2024-10-01 05:01:10
..	dir	-	root/root	drwxr-xr-x	2024-10-01 05:01:10
__pycache__	dir	-	root/root	drwxr-xr-x	2024-10-01 05:01:10
_validate_pyproject	dir	-	root/root	drwxr-xr-x	2024-10-01 05:01:10
__init__.py	text/plain	1.46 KB	root/root	-rw-r--r--	2024-09-04 06:22:37
_apply_pyprojecttoml.py	text/plain	14.38 KB	root/root	-rw-r--r--	2024-09-04 06:22:37
expand.py	text/plain	16 KB	root/root	-rw-r--r--	2024-09-04 06:22:37
pyprojecttoml.py	text/plain	16.96 KB	root/root	-rw-r--r--	2024-09-04 06:22:37
setupcfg.py	text/plain	24.93 KB	root/root	-rw-r--r--	2024-09-04 06:22:37