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📁 ..	-	2026-03-21 15:18
📄 __init__.py from typing import List, Optional from .base import BaseDistribution, BaseEnvironment, FilesystemWheel, MemoryWheel, Wheel __all__ = [ "BaseDistribution", "BaseEnvironment", "FilesystemWheel", "MemoryWheel", "Wheel", "get_default_environment", "get_environment", "get_wheel_distribution", ] def get_default_environment() -> BaseEnvironment: """Get the default representation for the current environment. This returns an Environment instance from the chosen backend. The default Environment instance should be built from ``sys.path`` and may use caching to share instance state accorss calls. """ from .pkg_resources import Environment return Environment.default() def get_environment(paths: Optional[List[str]]) -> BaseEnvironment: """Get a representation of the environment specified by ``paths``. This returns an Environment instance from the chosen backend based on the given import paths. The backend must build a fresh instance representing the state of installed distributions when this function is called. """ from .pkg_resources import Environment return Environment.from_paths(paths) def get_wheel_distribution(wheel: Wheel, canonical_name: str) -> BaseDistribution: """Get the representation of the specified wheel's distribution metadata. This returns a Distribution instance from the chosen backend based on the given wheel's ``.dist-info`` directory. :param canonical_name: Normalized project name of the given wheel. """ from .pkg_resources import Distribution return Distribution.from_wheel(wheel, canonical_name)	1.62 KB	2024-10-02 19:13
📁 __pycache__	-	2026-03-21 15:18
📄 base.py import email.message import json import logging import re import zipfile from typing import ( IO, TYPE_CHECKING, Collection, Container, Iterable, Iterator, List, Optional, Union, ) from pip._vendor.packaging.requirements import Requirement from pip._vendor.packaging.specifiers import InvalidSpecifier, SpecifierSet from pip._vendor.packaging.utils import NormalizedName from pip._vendor.packaging.version import LegacyVersion, Version from pip._internal.models.direct_url import ( DIRECT_URL_METADATA_NAME, DirectUrl, DirectUrlValidationError, ) from pip._internal.utils.compat import stdlib_pkgs # TODO: Move definition here. from pip._internal.utils.egg_link import egg_link_path_from_sys_path from pip._internal.utils.urls import url_to_path if TYPE_CHECKING: from typing import Protocol else: Protocol = object DistributionVersion = Union[LegacyVersion, Version] logger = logging.getLogger(__name__) class BaseEntryPoint(Protocol): @property def name(self) -> str: raise NotImplementedError() @property def value(self) -> str: raise NotImplementedError() @property def group(self) -> str: raise NotImplementedError() class BaseDistribution(Protocol): def __repr__(self) -> str: return f"{self.raw_name} {self.version} ({self.location})" def __str__(self) -> str: return f"{self.raw_name} {self.version}" @property def location(self) -> Optional[str]: """Where the distribution is loaded from. A string value is not necessarily a filesystem path, since distributions can be loaded from other sources, e.g. arbitrary zip archives. ``None`` means the distribution is created in-memory. Do not canonicalize this value with e.g. ``pathlib.Path.resolve()``. If this is a symbolic link, we want to preserve the relative path between it and files in the distribution. """ raise NotImplementedError() @property def editable_project_location(self) -> Optional[str]: """The project location for editable distributions. This is the directory where pyproject.toml or setup.py is located. None if the distribution is not installed in editable mode. """ # TODO: this property is relatively costly to compute, memoize it ? direct_url = self.direct_url if direct_url: if direct_url.is_local_editable(): return url_to_path(direct_url.url) else: # Search for an .egg-link file by walking sys.path, as it was # done before by dist_is_editable(). egg_link_path = egg_link_path_from_sys_path(self.raw_name) if egg_link_path: # TODO: get project location from second line of egg_link file # (https://github.com/pypa/pip/issues/10243) return self.location return None @property def info_directory(self) -> Optional[str]: """Location of the .[egg\|dist]-info directory. Similarly to ``location``, a string value is not necessarily a filesystem path. ``None`` means the distribution is created in-memory. For a modern .dist-info installation on disk, this should be something like ``{location}/{raw_name}-{version}.dist-info``. Do not canonicalize this value with e.g. ``pathlib.Path.resolve()``. If this is a symbolic link, we want to preserve the relative path between it and other files in the distribution. """ raise NotImplementedError() @property def canonical_name(self) -> NormalizedName: raise NotImplementedError() @property def version(self) -> DistributionVersion: raise NotImplementedError() @property def direct_url(self) -> Optional[DirectUrl]: """Obtain a DirectUrl from this distribution. Returns None if the distribution has no `direct_url.json` metadata, or if `direct_url.json` is invalid. """ try: content = self.read_text(DIRECT_URL_METADATA_NAME) except FileNotFoundError: return None try: return DirectUrl.from_json(content) except ( UnicodeDecodeError, json.JSONDecodeError, DirectUrlValidationError, ) as e: logger.warning( "Error parsing %s for %s: %s", DIRECT_URL_METADATA_NAME, self.canonical_name, e, ) return None @property def installer(self) -> str: raise NotImplementedError() @property def editable(self) -> bool: return bool(self.editable_project_location) @property def local(self) -> bool: raise NotImplementedError() @property def in_usersite(self) -> bool: raise NotImplementedError() @property def in_site_packages(self) -> bool: raise NotImplementedError() def read_text(self, name: str) -> str: """Read a file in the .dist-info (or .egg-info) directory. Should raise ``FileNotFoundError`` if ``name`` does not exist in the metadata directory. """ raise NotImplementedError() def iter_entry_points(self) -> Iterable[BaseEntryPoint]: raise NotImplementedError() @property def metadata(self) -> email.message.Message: """Metadata of distribution parsed from e.g. METADATA or PKG-INFO.""" raise NotImplementedError() @property def metadata_version(self) -> Optional[str]: """Value of "Metadata-Version:" in distribution metadata, if available.""" return self.metadata.get("Metadata-Version") @property def raw_name(self) -> str: """Value of "Name:" in distribution metadata.""" # The metadata should NEVER be missing the Name: key, but if it somehow # does, fall back to the known canonical name. return self.metadata.get("Name", self.canonical_name) @property def requires_python(self) -> SpecifierSet: """Value of "Requires-Python:" in distribution metadata. If the key does not exist or contains an invalid value, an empty SpecifierSet should be returned. """ value = self.metadata.get("Requires-Python") if value is None: return SpecifierSet() try: # Convert to str to satisfy the type checker; this can be a Header object. spec = SpecifierSet(str(value)) except InvalidSpecifier as e: message = "Package %r has an invalid Requires-Python: %s" logger.warning(message, self.raw_name, e) return SpecifierSet() return spec def iter_dependencies(self, extras: Collection[str] = ()) -> Iterable[Requirement]: """Dependencies of this distribution. For modern .dist-info distributions, this is the collection of "Requires-Dist:" entries in distribution metadata. """ raise NotImplementedError() def iter_provided_extras(self) -> Iterable[str]: """Extras provided by this distribution. For modern .dist-info distributions, this is the collection of "Provides-Extra:" entries in distribution metadata. """ raise NotImplementedError() class BaseEnvironment: """An environment containing distributions to introspect.""" @classmethod def default(cls) -> "BaseEnvironment": raise NotImplementedError() @classmethod def from_paths(cls, paths: Optional[List[str]]) -> "BaseEnvironment": raise NotImplementedError() def get_distribution(self, name: str) -> Optional["BaseDistribution"]: """Given a requirement name, return the installed distributions.""" raise NotImplementedError() def _iter_distributions(self) -> Iterator["BaseDistribution"]: """Iterate through installed distributions. This function should be implemented by subclass, but never called directly. Use the public ``iter_distribution()`` instead, which implements additional logic to make sure the distributions are valid. """ raise NotImplementedError() def iter_distributions(self) -> Iterator["BaseDistribution"]: """Iterate through installed distributions.""" for dist in self._iter_distributions(): # Make sure the distribution actually comes from a valid Python # packaging distribution. Pip's AdjacentTempDirectory leaves folders # e.g. ``~atplotlib.dist-info`` if cleanup was interrupted. The # valid project name pattern is taken from PEP 508. project_name_valid = re.match( r"^([A-Z0-9]\|[A-Z0-9][A-Z0-9._-]*[A-Z0-9])$", dist.canonical_name, flags=re.IGNORECASE, ) if not project_name_valid: logger.warning( "Ignoring invalid distribution %s (%s)", dist.canonical_name, dist.location, ) continue yield dist def iter_installed_distributions( self, local_only: bool = True, skip: Container[str] = stdlib_pkgs, include_editables: bool = True, editables_only: bool = False, user_only: bool = False, ) -> Iterator[BaseDistribution]: """Return a list of installed distributions. :param local_only: If True (default), only return installations local to the current virtualenv, if in a virtualenv. :param skip: An iterable of canonicalized project names to ignore; defaults to ``stdlib_pkgs``. :param include_editables: If False, don't report editables. :param editables_only: If True, only report editables. :param user_only: If True, only report installations in the user site directory. """ it = self.iter_distributions() if local_only: it = (d for d in it if d.local) if not include_editables: it = (d for d in it if not d.editable) if editables_only: it = (d for d in it if d.editable) if user_only: it = (d for d in it if d.in_usersite) return (d for d in it if d.canonical_name not in skip) class Wheel(Protocol): location: str def as_zipfile(self) -> zipfile.ZipFile: raise NotImplementedError() class FilesystemWheel(Wheel): def __init__(self, location: str) -> None: self.location = location def as_zipfile(self) -> zipfile.ZipFile: return zipfile.ZipFile(self.location, allowZip64=True) class MemoryWheel(Wheel): def __init__(self, location: str, stream: IO[bytes]) -> None: self.location = location self.stream = stream def as_zipfile(self) -> zipfile.ZipFile: return zipfile.ZipFile(self.stream, allowZip64=True)	10.84 KB	2024-10-02 19:13
📄 pkg_resources.py import email.message import logging from typing import Collection, Iterable, Iterator, List, NamedTuple, Optional from pip._vendor import pkg_resources from pip._vendor.packaging.requirements import Requirement from pip._vendor.packaging.utils import NormalizedName, canonicalize_name from pip._vendor.packaging.version import parse as parse_version from pip._internal.utils import misc # TODO: Move definition here. from pip._internal.utils.packaging import get_installer, get_metadata from pip._internal.utils.wheel import pkg_resources_distribution_for_wheel from .base import ( BaseDistribution, BaseEntryPoint, BaseEnvironment, DistributionVersion, Wheel, ) logger = logging.getLogger(__name__) class EntryPoint(NamedTuple): name: str value: str group: str class Distribution(BaseDistribution): def __init__(self, dist: pkg_resources.Distribution) -> None: self._dist = dist @classmethod def from_wheel(cls, wheel: Wheel, name: str) -> "Distribution": with wheel.as_zipfile() as zf: dist = pkg_resources_distribution_for_wheel(zf, name, wheel.location) return cls(dist) @property def location(self) -> Optional[str]: return self._dist.location @property def info_directory(self) -> Optional[str]: return self._dist.egg_info @property def canonical_name(self) -> NormalizedName: return canonicalize_name(self._dist.project_name) @property def version(self) -> DistributionVersion: return parse_version(self._dist.version) @property def installer(self) -> str: return get_installer(self._dist) @property def local(self) -> bool: return misc.dist_is_local(self._dist) @property def in_usersite(self) -> bool: return misc.dist_in_usersite(self._dist) @property def in_site_packages(self) -> bool: return misc.dist_in_site_packages(self._dist) def read_text(self, name: str) -> str: if not self._dist.has_metadata(name): raise FileNotFoundError(name) return self._dist.get_metadata(name) def iter_entry_points(self) -> Iterable[BaseEntryPoint]: for group, entries in self._dist.get_entry_map().items(): for name, entry_point in entries.items(): name, _, value = str(entry_point).partition("=") yield EntryPoint(name=name.strip(), value=value.strip(), group=group) @property def metadata(self) -> email.message.Message: return get_metadata(self._dist) def iter_dependencies(self, extras: Collection[str] = ()) -> Iterable[Requirement]: if extras: # pkg_resources raises on invalid extras, so we sanitize. extras = frozenset(extras).intersection(self._dist.extras) return self._dist.requires(extras) def iter_provided_extras(self) -> Iterable[str]: return self._dist.extras class Environment(BaseEnvironment): def __init__(self, ws: pkg_resources.WorkingSet) -> None: self._ws = ws @classmethod def default(cls) -> BaseEnvironment: return cls(pkg_resources.working_set) @classmethod def from_paths(cls, paths: Optional[List[str]]) -> BaseEnvironment: return cls(pkg_resources.WorkingSet(paths)) def _search_distribution(self, name: str) -> Optional[BaseDistribution]: """Find a distribution matching the ``name`` in the environment. This searches from all distributions available in the environment, to match the behavior of ``pkg_resources.get_distribution()``. """ canonical_name = canonicalize_name(name) for dist in self.iter_distributions(): if dist.canonical_name == canonical_name: return dist return None def get_distribution(self, name: str) -> Optional[BaseDistribution]: # Search the distribution by looking through the working set. dist = self._search_distribution(name) if dist: return dist # If distribution could not be found, call working_set.require to # update the working set, and try to find the distribution again. # This might happen for e.g. when you install a package twice, once # using setup.py develop and again using setup.py install. Now when # running pip uninstall twice, the package gets removed from the # working set in the first uninstall, so we have to populate the # working set again so that pip knows about it and the packages gets # picked up and is successfully uninstalled the second time too. try: # We didn't pass in any version specifiers, so this can never # raise pkg_resources.VersionConflict. self._ws.require(name) except pkg_resources.DistributionNotFound: return None return self._search_distribution(name) def _iter_distributions(self) -> Iterator[BaseDistribution]: for dist in self._ws: yield Distribution(dist)	4.97 KB	2024-10-02 19:13

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