AlkantarClanX12
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import importlib.metadata
from typing import Any, Optional, Protocol, cast
class BadMetadata(ValueError):
def __init__(self, dist: importlib.metadata.Distribution, *, reason: str) -> None:
self.dist = dist
self.reason = reason
def __str__(self) -> str:
return f"Bad metadata in {self.dist} ({self.reason})"
class BasePath(Protocol):
"""A protocol that various path objects conform.
This exists because importlib.metadata uses both ``pathlib.Path`` and
``zipfile.Path``, and we need a common base for type hints (Union does not
work well since ``zipfile.Path`` is too new for our linter setup).
This does not mean to be exhaustive, but only contains things that present
in both classes *that we need*.
"""
@property
def name(self) -> str:
raise NotImplementedError()
@property
def parent(self) -> "BasePath":
raise NotImplementedError()
def get_info_location(d: importlib.metadata.Distribution) -> Optional[BasePath]:
"""Find the path to the distribution's metadata directory.
HACK: This relies on importlib.metadata's private ``_path`` attribute. Not
all distributions exist on disk, so importlib.metadata is correct to not
expose the attribute as public. But pip's code base is old and not as clean,
so we do this to avoid having to rewrite too many things. Hopefully we can
eliminate this some day.
"""
return getattr(d, "_path", None)
def get_dist_name(dist: importlib.metadata.Distribution) -> str:
"""Get the distribution's project name.
The ``name`` attribute is only available in Python 3.10 or later. We are
targeting exactly that, but Mypy does not know this.
"""
name = cast(Any, dist).name
if not isinstance(name, str):
raise BadMetadata(dist, reason="invalid metadata entry 'name'")
return name