143 lines
4.6 KiB
Python
143 lines
4.6 KiB
Python
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import logging
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import re
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from typing import Container, Iterator, List, Optional, Union
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from pip._vendor.packaging.version import LegacyVersion, Version
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from pip._internal.utils.misc import stdlib_pkgs # TODO: Move definition here.
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DistributionVersion = Union[LegacyVersion, Version]
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logger = logging.getLogger(__name__)
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class BaseDistribution:
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@property
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def location(self):
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# type: () -> 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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"""
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raise NotImplementedError()
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@property
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def metadata_version(self):
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# type: () -> Optional[str]
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"""Value of "Metadata-Version:" in the distribution, if available."""
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raise NotImplementedError()
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@property
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def canonical_name(self):
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# type: () -> str
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raise NotImplementedError()
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@property
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def version(self):
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# type: () -> DistributionVersion
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raise NotImplementedError()
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@property
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def installer(self):
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# type: () -> str
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raise NotImplementedError()
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@property
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def editable(self):
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# type: () -> bool
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raise NotImplementedError()
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@property
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def local(self):
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# type: () -> bool
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raise NotImplementedError()
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@property
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def in_usersite(self):
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# type: () -> bool
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raise NotImplementedError()
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class BaseEnvironment:
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"""An environment containing distributions to introspect."""
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@classmethod
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def default(cls):
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# type: () -> BaseEnvironment
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raise NotImplementedError()
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@classmethod
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def from_paths(cls, paths):
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# type: (Optional[List[str]]) -> BaseEnvironment
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raise NotImplementedError()
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def get_distribution(self, name):
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# type: (str) -> Optional[BaseDistribution]
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"""Given a requirement name, return the installed distributions."""
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raise NotImplementedError()
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def _iter_distributions(self):
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# type: () -> Iterator[BaseDistribution]
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"""Iterate through installed distributions.
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This function should be implemented by subclass, but never called
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directly. Use the public ``iter_distribution()`` instead, which
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implements additional logic to make sure the distributions are valid.
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"""
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raise NotImplementedError()
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def iter_distributions(self):
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# type: () -> Iterator[BaseDistribution]
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"""Iterate through installed distributions."""
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for dist in self._iter_distributions():
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# Make sure the distribution actually comes from a valid Python
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# packaging distribution. Pip's AdjacentTempDirectory leaves folders
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# e.g. ``~atplotlib.dist-info`` if cleanup was interrupted. The
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# valid project name pattern is taken from PEP 508.
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project_name_valid = re.match(
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r"^([A-Z0-9]|[A-Z0-9][A-Z0-9._-]*[A-Z0-9])$",
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dist.canonical_name,
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flags=re.IGNORECASE,
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)
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if not project_name_valid:
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logger.warning(
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"Ignoring invalid distribution %s (%s)",
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dist.canonical_name,
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dist.location,
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)
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continue
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yield dist
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def iter_installed_distributions(
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self,
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local_only=True, # type: bool
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skip=stdlib_pkgs, # type: Container[str]
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include_editables=True, # type: bool
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editables_only=False, # type: bool
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user_only=False, # type: bool
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):
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# type: (...) -> Iterator[BaseDistribution]
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"""Return a list of installed distributions.
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:param local_only: If True (default), only return installations
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local to the current virtualenv, if in a virtualenv.
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:param skip: An iterable of canonicalized project names to ignore;
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defaults to ``stdlib_pkgs``.
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:param include_editables: If False, don't report editables.
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:param editables_only: If True, only report editables.
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:param user_only: If True, only report installations in the user
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site directory.
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"""
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it = self.iter_distributions()
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if local_only:
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it = (d for d in it if d.local)
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if not include_editables:
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it = (d for d in it if not d.editable)
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if editables_only:
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it = (d for d in it if d.editable)
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if user_only:
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it = (d for d in it if d.in_usersite)
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return (d for d in it if d.canonical_name not in skip)
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