mirror of
https://github.com/pypa/pip
synced 2023-12-13 21:30:23 +01:00
9ba2bb90fb
The importlib.metadata and pkg_resources backends unfortunately normalize extras differently, and we don't really want to continue using the latter's logic (being partially lossy while still not compliant to standards), so we add a new abstraction for the purpose.
703 lines
25 KiB
Python
703 lines
25 KiB
Python
import csv
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import email.message
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import functools
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import json
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import logging
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import pathlib
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import re
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import zipfile
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from typing import (
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IO,
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TYPE_CHECKING,
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Any,
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Collection,
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Container,
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Dict,
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Iterable,
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Iterator,
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List,
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NamedTuple,
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Optional,
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Tuple,
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Union,
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)
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from pip._vendor.packaging.requirements import Requirement
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from pip._vendor.packaging.specifiers import InvalidSpecifier, SpecifierSet
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from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
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from pip._vendor.packaging.version import LegacyVersion, Version
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from pip._internal.exceptions import NoneMetadataError
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from pip._internal.locations import site_packages, user_site
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from pip._internal.models.direct_url import (
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DIRECT_URL_METADATA_NAME,
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DirectUrl,
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DirectUrlValidationError,
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)
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from pip._internal.utils.compat import stdlib_pkgs # TODO: Move definition here.
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from pip._internal.utils.egg_link import egg_link_path_from_sys_path
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from pip._internal.utils.misc import is_local, normalize_path
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from pip._internal.utils.urls import url_to_path
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from ._json import msg_to_json
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if TYPE_CHECKING:
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from typing import Protocol
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else:
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Protocol = object
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DistributionVersion = Union[LegacyVersion, Version]
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InfoPath = Union[str, pathlib.PurePath]
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logger = logging.getLogger(__name__)
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class BaseEntryPoint(Protocol):
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@property
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def name(self) -> str:
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raise NotImplementedError()
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@property
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def value(self) -> str:
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raise NotImplementedError()
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@property
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def group(self) -> str:
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raise NotImplementedError()
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def _convert_installed_files_path(
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entry: Tuple[str, ...],
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info: Tuple[str, ...],
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) -> str:
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"""Convert a legacy installed-files.txt path into modern RECORD path.
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The legacy format stores paths relative to the info directory, while the
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modern format stores paths relative to the package root, e.g. the
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site-packages directory.
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:param entry: Path parts of the installed-files.txt entry.
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:param info: Path parts of the egg-info directory relative to package root.
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:returns: The converted entry.
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For best compatibility with symlinks, this does not use ``abspath()`` or
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``Path.resolve()``, but tries to work with path parts:
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1. While ``entry`` starts with ``..``, remove the equal amounts of parts
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from ``info``; if ``info`` is empty, start appending ``..`` instead.
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2. Join the two directly.
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"""
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while entry and entry[0] == "..":
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if not info or info[-1] == "..":
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info += ("..",)
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else:
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info = info[:-1]
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entry = entry[1:]
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return str(pathlib.Path(*info, *entry))
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class RequiresEntry(NamedTuple):
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requirement: str
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extra: str
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marker: str
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class BaseDistribution(Protocol):
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@classmethod
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def from_directory(cls, directory: str) -> "BaseDistribution":
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"""Load the distribution from a metadata directory.
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:param directory: Path to a metadata directory, e.g. ``.dist-info``.
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"""
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raise NotImplementedError()
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@classmethod
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def from_metadata_file_contents(
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cls,
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metadata_contents: bytes,
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filename: str,
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project_name: str,
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) -> "BaseDistribution":
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"""Load the distribution from the contents of a METADATA file.
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This is used to implement PEP 658 by generating a "shallow" dist object that can
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be used for resolution without downloading or building the actual dist yet.
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:param metadata_contents: The contents of a METADATA file.
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:param filename: File name for the dist with this metadata.
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:param project_name: Name of the project this dist represents.
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"""
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raise NotImplementedError()
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@classmethod
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def from_wheel(cls, wheel: "Wheel", name: str) -> "BaseDistribution":
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"""Load the distribution from a given wheel.
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:param wheel: A concrete wheel definition.
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:param name: File name of the wheel.
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:raises InvalidWheel: Whenever loading of the wheel causes a
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:py:exc:`zipfile.BadZipFile` exception to be thrown.
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:raises UnsupportedWheel: If the wheel is a valid zip, but malformed
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internally.
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"""
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raise NotImplementedError()
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def __repr__(self) -> str:
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return f"{self.raw_name} {self.version} ({self.location})"
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def __str__(self) -> str:
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return f"{self.raw_name} {self.version}"
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@property
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def location(self) -> Optional[str]:
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"""Where the distribution is loaded from.
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A string value is not necessarily a filesystem path, since distributions
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can be loaded from other sources, e.g. arbitrary zip archives. ``None``
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means the distribution is created in-memory.
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Do not canonicalize this value with e.g. ``pathlib.Path.resolve()``. If
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this is a symbolic link, we want to preserve the relative path between
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it and files in the distribution.
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"""
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raise NotImplementedError()
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@property
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def editable_project_location(self) -> Optional[str]:
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"""The project location for editable distributions.
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This is the directory where pyproject.toml or setup.py is located.
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None if the distribution is not installed in editable mode.
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"""
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# TODO: this property is relatively costly to compute, memoize it ?
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direct_url = self.direct_url
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if direct_url:
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if direct_url.is_local_editable():
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return url_to_path(direct_url.url)
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else:
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# Search for an .egg-link file by walking sys.path, as it was
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# done before by dist_is_editable().
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egg_link_path = egg_link_path_from_sys_path(self.raw_name)
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if egg_link_path:
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# TODO: get project location from second line of egg_link file
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# (https://github.com/pypa/pip/issues/10243)
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return self.location
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return None
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@property
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def installed_location(self) -> Optional[str]:
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"""The distribution's "installed" location.
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This should generally be a ``site-packages`` directory. This is
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usually ``dist.location``, except for legacy develop-installed packages,
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where ``dist.location`` is the source code location, and this is where
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the ``.egg-link`` file is.
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The returned location is normalized (in particular, with symlinks removed).
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"""
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raise NotImplementedError()
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@property
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def info_location(self) -> Optional[str]:
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"""Location of the .[egg|dist]-info directory or file.
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Similarly to ``location``, a string value is not necessarily a
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filesystem path. ``None`` means the distribution is created in-memory.
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For a modern .dist-info installation on disk, this should be something
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like ``{location}/{raw_name}-{version}.dist-info``.
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Do not canonicalize this value with e.g. ``pathlib.Path.resolve()``. If
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this is a symbolic link, we want to preserve the relative path between
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it and other files in the distribution.
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"""
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raise NotImplementedError()
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@property
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def installed_by_distutils(self) -> bool:
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"""Whether this distribution is installed with legacy distutils format.
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A distribution installed with "raw" distutils not patched by setuptools
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uses one single file at ``info_location`` to store metadata. We need to
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treat this specially on uninstallation.
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"""
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info_location = self.info_location
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if not info_location:
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return False
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return pathlib.Path(info_location).is_file()
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@property
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def installed_as_egg(self) -> bool:
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"""Whether this distribution is installed as an egg.
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This usually indicates the distribution was installed by (older versions
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of) easy_install.
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"""
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location = self.location
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if not location:
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return False
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return location.endswith(".egg")
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@property
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def installed_with_setuptools_egg_info(self) -> bool:
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"""Whether this distribution is installed with the ``.egg-info`` format.
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This usually indicates the distribution was installed with setuptools
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with an old pip version or with ``single-version-externally-managed``.
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Note that this ensure the metadata store is a directory. distutils can
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also installs an ``.egg-info``, but as a file, not a directory. This
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property is *False* for that case. Also see ``installed_by_distutils``.
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"""
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info_location = self.info_location
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if not info_location:
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return False
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if not info_location.endswith(".egg-info"):
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return False
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return pathlib.Path(info_location).is_dir()
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@property
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def installed_with_dist_info(self) -> bool:
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"""Whether this distribution is installed with the "modern format".
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This indicates a "modern" installation, e.g. storing metadata in the
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``.dist-info`` directory. This applies to installations made by
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setuptools (but through pip, not directly), or anything using the
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standardized build backend interface (PEP 517).
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"""
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info_location = self.info_location
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if not info_location:
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return False
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if not info_location.endswith(".dist-info"):
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return False
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return pathlib.Path(info_location).is_dir()
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@property
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def canonical_name(self) -> NormalizedName:
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raise NotImplementedError()
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@property
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def version(self) -> DistributionVersion:
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raise NotImplementedError()
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@property
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def setuptools_filename(self) -> str:
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"""Convert a project name to its setuptools-compatible filename.
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This is a copy of ``pkg_resources.to_filename()`` for compatibility.
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"""
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return self.raw_name.replace("-", "_")
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@property
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def direct_url(self) -> Optional[DirectUrl]:
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"""Obtain a DirectUrl from this distribution.
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Returns None if the distribution has no `direct_url.json` metadata,
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or if `direct_url.json` is invalid.
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"""
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try:
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content = self.read_text(DIRECT_URL_METADATA_NAME)
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except FileNotFoundError:
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return None
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try:
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return DirectUrl.from_json(content)
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except (
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UnicodeDecodeError,
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json.JSONDecodeError,
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DirectUrlValidationError,
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) as e:
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logger.warning(
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"Error parsing %s for %s: %s",
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DIRECT_URL_METADATA_NAME,
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self.canonical_name,
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e,
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)
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return None
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@property
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def installer(self) -> str:
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try:
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installer_text = self.read_text("INSTALLER")
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except (OSError, ValueError, NoneMetadataError):
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return "" # Fail silently if the installer file cannot be read.
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for line in installer_text.splitlines():
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cleaned_line = line.strip()
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if cleaned_line:
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return cleaned_line
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return ""
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@property
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def requested(self) -> bool:
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return self.is_file("REQUESTED")
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@property
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def editable(self) -> bool:
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return bool(self.editable_project_location)
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@property
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def local(self) -> bool:
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"""If distribution is installed in the current virtual environment.
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Always True if we're not in a virtualenv.
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"""
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if self.installed_location is None:
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return False
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return is_local(self.installed_location)
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@property
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def in_usersite(self) -> bool:
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if self.installed_location is None or user_site is None:
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return False
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return self.installed_location.startswith(normalize_path(user_site))
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@property
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def in_site_packages(self) -> bool:
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if self.installed_location is None or site_packages is None:
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return False
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return self.installed_location.startswith(normalize_path(site_packages))
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def is_file(self, path: InfoPath) -> bool:
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"""Check whether an entry in the info directory is a file."""
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raise NotImplementedError()
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def iter_distutils_script_names(self) -> Iterator[str]:
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"""Find distutils 'scripts' entries metadata.
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If 'scripts' is supplied in ``setup.py``, distutils records those in the
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installed distribution's ``scripts`` directory, a file for each script.
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"""
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raise NotImplementedError()
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def read_text(self, path: InfoPath) -> str:
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"""Read a file in the info directory.
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:raise FileNotFoundError: If ``path`` does not exist in the directory.
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:raise NoneMetadataError: If ``path`` exists in the info directory, but
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cannot be read.
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"""
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raise NotImplementedError()
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def iter_entry_points(self) -> Iterable[BaseEntryPoint]:
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raise NotImplementedError()
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def _metadata_impl(self) -> email.message.Message:
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raise NotImplementedError()
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@functools.lru_cache(maxsize=1)
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def _metadata_cached(self) -> email.message.Message:
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# When we drop python 3.7 support, move this to the metadata property and use
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# functools.cached_property instead of lru_cache.
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metadata = self._metadata_impl()
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self._add_egg_info_requires(metadata)
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return metadata
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@property
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def metadata(self) -> email.message.Message:
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"""Metadata of distribution parsed from e.g. METADATA or PKG-INFO.
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This should return an empty message if the metadata file is unavailable.
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:raises NoneMetadataError: If the metadata file is available, but does
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not contain valid metadata.
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"""
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return self._metadata_cached()
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@property
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def metadata_dict(self) -> Dict[str, Any]:
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"""PEP 566 compliant JSON-serializable representation of METADATA or PKG-INFO.
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This should return an empty dict if the metadata file is unavailable.
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:raises NoneMetadataError: If the metadata file is available, but does
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not contain valid metadata.
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"""
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return msg_to_json(self.metadata)
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@property
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def metadata_version(self) -> Optional[str]:
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"""Value of "Metadata-Version:" in distribution metadata, if available."""
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return self.metadata.get("Metadata-Version")
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@property
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def raw_name(self) -> str:
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"""Value of "Name:" in distribution metadata."""
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# The metadata should NEVER be missing the Name: key, but if it somehow
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# does, fall back to the known canonical name.
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return self.metadata.get("Name", self.canonical_name)
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@property
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def requires_python(self) -> SpecifierSet:
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"""Value of "Requires-Python:" in distribution metadata.
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If the key does not exist or contains an invalid value, an empty
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SpecifierSet should be returned.
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"""
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value = self.metadata.get("Requires-Python")
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if value is None:
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return SpecifierSet()
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try:
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# Convert to str to satisfy the type checker; this can be a Header object.
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spec = SpecifierSet(str(value))
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except InvalidSpecifier as e:
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message = "Package %r has an invalid Requires-Python: %s"
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logger.warning(message, self.raw_name, e)
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return SpecifierSet()
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return spec
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def iter_dependencies(self, extras: Collection[str] = ()) -> Iterable[Requirement]:
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"""Dependencies of this distribution.
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For modern .dist-info distributions, this is the collection of
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"Requires-Dist:" entries in distribution metadata.
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"""
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raise NotImplementedError()
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def iter_provided_extras(self) -> Iterable[str]:
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"""Extras provided by this distribution.
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For modern .dist-info distributions, this is the collection of
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"Provides-Extra:" entries in distribution metadata.
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The return value of this function is not particularly useful other than
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display purposes due to backward compatibility issues and the extra
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names being poorly normalized prior to PEP 685. If you want to perform
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logic operations on extras, use :func:`is_extra_provided` instead.
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"""
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raise NotImplementedError()
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def is_extra_provided(self, extra: str) -> bool:
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"""Check whether an extra is provided by this distribution.
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This is needed mostly for compatibility issues with pkg_resources not
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following the extra normalization rules defined in PEP 685.
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"""
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raise NotImplementedError()
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def _iter_declared_entries_from_record(self) -> Optional[Iterator[str]]:
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try:
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text = self.read_text("RECORD")
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except FileNotFoundError:
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return None
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# This extra Path-str cast normalizes entries.
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return (str(pathlib.Path(row[0])) for row in csv.reader(text.splitlines()))
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def _iter_declared_entries_from_legacy(self) -> Optional[Iterator[str]]:
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try:
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text = self.read_text("installed-files.txt")
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except FileNotFoundError:
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return None
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paths = (p for p in text.splitlines(keepends=False) if p)
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root = self.location
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info = self.info_location
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if root is None or info is None:
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return paths
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try:
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info_rel = pathlib.Path(info).relative_to(root)
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except ValueError: # info is not relative to root.
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return paths
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if not info_rel.parts: # info *is* root.
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return paths
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return (
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_convert_installed_files_path(pathlib.Path(p).parts, info_rel.parts)
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for p in paths
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)
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def iter_declared_entries(self) -> Optional[Iterator[str]]:
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"""Iterate through file entries declared in this distribution.
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For modern .dist-info distributions, this is the files listed in the
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``RECORD`` metadata file. For legacy setuptools distributions, this
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comes from ``installed-files.txt``, with entries normalized to be
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compatible with the format used by ``RECORD``.
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:return: An iterator for listed entries, or None if the distribution
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contains neither ``RECORD`` nor ``installed-files.txt``.
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"""
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return (
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self._iter_declared_entries_from_record()
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or self._iter_declared_entries_from_legacy()
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)
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def _iter_requires_txt_entries(self) -> Iterator[RequiresEntry]:
|
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"""Parse a ``requires.txt`` in an egg-info directory.
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This is an INI-ish format where an egg-info stores dependencies. A
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section name describes extra other environment markers, while each entry
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is an arbitrary string (not a key-value pair) representing a dependency
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as a requirement string (no markers).
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There is a construct in ``importlib.metadata`` called ``Sectioned`` that
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does mostly the same, but the format is currently considered private.
|
|
"""
|
|
try:
|
|
content = self.read_text("requires.txt")
|
|
except FileNotFoundError:
|
|
return
|
|
extra = marker = "" # Section-less entries don't have markers.
|
|
for line in content.splitlines():
|
|
line = line.strip()
|
|
if not line or line.startswith("#"): # Comment; ignored.
|
|
continue
|
|
if line.startswith("[") and line.endswith("]"): # A section header.
|
|
extra, _, marker = line.strip("[]").partition(":")
|
|
continue
|
|
yield RequiresEntry(requirement=line, extra=extra, marker=marker)
|
|
|
|
def _iter_egg_info_extras(self) -> Iterable[str]:
|
|
"""Get extras from the egg-info directory."""
|
|
known_extras = {""}
|
|
for entry in self._iter_requires_txt_entries():
|
|
extra = canonicalize_name(entry.extra)
|
|
if extra in known_extras:
|
|
continue
|
|
known_extras.add(extra)
|
|
yield extra
|
|
|
|
def _iter_egg_info_dependencies(self) -> Iterable[str]:
|
|
"""Get distribution dependencies from the egg-info directory.
|
|
|
|
To ease parsing, this converts a legacy dependency entry into a PEP 508
|
|
requirement string. Like ``_iter_requires_txt_entries()``, there is code
|
|
in ``importlib.metadata`` that does mostly the same, but not do exactly
|
|
what we need.
|
|
|
|
Namely, ``importlib.metadata`` does not normalize the extra name before
|
|
putting it into the requirement string, which causes marker comparison
|
|
to fail because the dist-info format do normalize. This is consistent in
|
|
all currently available PEP 517 backends, although not standardized.
|
|
"""
|
|
for entry in self._iter_requires_txt_entries():
|
|
extra = canonicalize_name(entry.extra)
|
|
if extra and entry.marker:
|
|
marker = f'({entry.marker}) and extra == "{extra}"'
|
|
elif extra:
|
|
marker = f'extra == "{extra}"'
|
|
elif entry.marker:
|
|
marker = entry.marker
|
|
else:
|
|
marker = ""
|
|
if marker:
|
|
yield f"{entry.requirement} ; {marker}"
|
|
else:
|
|
yield entry.requirement
|
|
|
|
def _add_egg_info_requires(self, metadata: email.message.Message) -> None:
|
|
"""Add egg-info requires.txt information to the metadata."""
|
|
if not metadata.get_all("Requires-Dist"):
|
|
for dep in self._iter_egg_info_dependencies():
|
|
metadata["Requires-Dist"] = dep
|
|
if not metadata.get_all("Provides-Extra"):
|
|
for extra in self._iter_egg_info_extras():
|
|
metadata["Provides-Extra"] = extra
|
|
|
|
|
|
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.
|
|
|
|
The name may not be normalized. The implementation must canonicalize
|
|
it for lookup.
|
|
"""
|
|
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_all_distributions(self) -> Iterator[BaseDistribution]:
|
|
"""Iterate through all installed distributions without any filtering."""
|
|
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.
|
|
|
|
This is based on ``iter_all_distributions()`` with additional filtering
|
|
options. Note that ``iter_installed_distributions()`` without arguments
|
|
is *not* equal to ``iter_all_distributions()``, since some of the
|
|
configurations exclude packages by default.
|
|
|
|
: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_all_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)
|