mirror of
https://github.com/aykhans/AzSuicideDataVisualization.git
synced 2025-07-04 23:32:37 +00:00
first commit
This commit is contained in:
Ayxan
@ -0,0 +1,4 @@
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from ._dists import Distribution
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from ._envs import Environment
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__all__ = ["Distribution", "Environment"]
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@ -0,0 +1,41 @@
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import importlib.metadata
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from typing import Any, Optional, Protocol, cast
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class BasePath(Protocol):
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"""A protocol that various path objects conform.
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This exists because importlib.metadata uses both ``pathlib.Path`` and
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``zipfile.Path``, and we need a common base for type hints (Union does not
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work well since ``zipfile.Path`` is too new for our linter setup).
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This does not mean to be exhaustive, but only contains things that present
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in both classes *that we need*.
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"""
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name: str
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@property
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def parent(self) -> "BasePath":
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raise NotImplementedError()
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def get_info_location(d: importlib.metadata.Distribution) -> Optional[BasePath]:
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"""Find the path to the distribution's metadata directory.
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HACK: This relies on importlib.metadata's private ``_path`` attribute. Not
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all distributions exist on disk, so importlib.metadata is correct to not
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expose the attribute as public. But pip's code base is old and not as clean,
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so we do this to avoid having to rewrite too many things. Hopefully we can
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eliminate this some day.
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"""
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return getattr(d, "_path", None)
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def get_dist_name(dist: importlib.metadata.Distribution) -> str:
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"""Get the distribution's project name.
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The ``name`` attribute is only available in Python 3.10 or later. We are
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targeting exactly that, but Mypy does not know this.
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"""
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return cast(Any, dist).name
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@ -0,0 +1,274 @@
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import email.message
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import importlib.metadata
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import os
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import pathlib
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import zipfile
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from typing import (
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Collection,
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Dict,
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Iterable,
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Iterator,
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Mapping,
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NamedTuple,
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Optional,
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Sequence,
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)
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from pip._vendor.packaging.requirements import Requirement
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from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
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from pip._vendor.packaging.version import parse as parse_version
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from pip._internal.exceptions import InvalidWheel, UnsupportedWheel
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from pip._internal.metadata.base import (
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BaseDistribution,
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BaseEntryPoint,
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DistributionVersion,
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InfoPath,
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Wheel,
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)
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from pip._internal.utils.misc import normalize_path
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from pip._internal.utils.packaging import safe_extra
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from pip._internal.utils.wheel import parse_wheel, read_wheel_metadata_file
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from ._compat import BasePath, get_dist_name
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class WheelDistribution(importlib.metadata.Distribution):
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"""An ``importlib.metadata.Distribution`` read from a wheel.
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Although ``importlib.metadata.PathDistribution`` accepts ``zipfile.Path``,
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its implementation is too "lazy" for pip's needs (we can't keep the ZipFile
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handle open for the entire lifetime of the distribution object).
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This implementation eagerly reads the entire metadata directory into the
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memory instead, and operates from that.
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"""
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def __init__(
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self,
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files: Mapping[pathlib.PurePosixPath, bytes],
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info_location: pathlib.PurePosixPath,
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) -> None:
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self._files = files
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self.info_location = info_location
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@classmethod
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def from_zipfile(
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cls,
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zf: zipfile.ZipFile,
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name: str,
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location: str,
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) -> "WheelDistribution":
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info_dir, _ = parse_wheel(zf, name)
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paths = (
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(name, pathlib.PurePosixPath(name.split("/", 1)[-1]))
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for name in zf.namelist()
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if name.startswith(f"{info_dir}/")
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)
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files = {
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relpath: read_wheel_metadata_file(zf, fullpath)
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for fullpath, relpath in paths
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}
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info_location = pathlib.PurePosixPath(location, info_dir)
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return cls(files, info_location)
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def iterdir(self, path: InfoPath) -> Iterator[pathlib.PurePosixPath]:
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# Only allow iterating through the metadata directory.
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if pathlib.PurePosixPath(str(path)) in self._files:
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return iter(self._files)
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raise FileNotFoundError(path)
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def read_text(self, filename: str) -> Optional[str]:
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try:
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data = self._files[pathlib.PurePosixPath(filename)]
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except KeyError:
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return None
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try:
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text = data.decode("utf-8")
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except UnicodeDecodeError as e:
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wheel = self.info_location.parent
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error = f"Error decoding metadata for {wheel}: {e} in {filename} file"
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raise UnsupportedWheel(error)
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return text
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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 Distribution(BaseDistribution):
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def __init__(
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self,
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dist: importlib.metadata.Distribution,
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info_location: Optional[BasePath],
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installed_location: Optional[BasePath],
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) -> None:
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self._dist = dist
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self._info_location = info_location
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self._installed_location = installed_location
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@classmethod
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def from_directory(cls, directory: str) -> BaseDistribution:
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info_location = pathlib.Path(directory)
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dist = importlib.metadata.Distribution.at(info_location)
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return cls(dist, info_location, info_location.parent)
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@classmethod
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def from_wheel(cls, wheel: Wheel, name: str) -> BaseDistribution:
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try:
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with wheel.as_zipfile() as zf:
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dist = WheelDistribution.from_zipfile(zf, name, wheel.location)
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except zipfile.BadZipFile as e:
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raise InvalidWheel(wheel.location, name) from e
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except UnsupportedWheel as e:
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raise UnsupportedWheel(f"{name} has an invalid wheel, {e}")
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return cls(dist, dist.info_location, pathlib.PurePosixPath(wheel.location))
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@property
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def location(self) -> Optional[str]:
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if self._info_location is None:
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return None
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return str(self._info_location.parent)
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@property
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def info_location(self) -> Optional[str]:
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if self._info_location is None:
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return None
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return str(self._info_location)
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@property
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def installed_location(self) -> Optional[str]:
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if self._installed_location is None:
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return None
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return normalize_path(str(self._installed_location))
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def _get_dist_name_from_location(self) -> Optional[str]:
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"""Try to get the name from the metadata directory name.
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This is much faster than reading metadata.
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"""
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if self._info_location is None:
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return None
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stem, suffix = os.path.splitext(self._info_location.name)
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if suffix not in (".dist-info", ".egg-info"):
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return None
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return stem.split("-", 1)[0]
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@property
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def canonical_name(self) -> NormalizedName:
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name = self._get_dist_name_from_location() or get_dist_name(self._dist)
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return canonicalize_name(name)
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@property
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def version(self) -> DistributionVersion:
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return parse_version(self._dist.version)
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def is_file(self, path: InfoPath) -> bool:
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return self._dist.read_text(str(path)) is not None
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def iter_distutils_script_names(self) -> Iterator[str]:
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# A distutils installation is always "flat" (not in e.g. egg form), so
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# if this distribution's info location is NOT a pathlib.Path (but e.g.
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# zipfile.Path), it can never contain any distutils scripts.
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if not isinstance(self._info_location, pathlib.Path):
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return
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for child in self._info_location.joinpath("scripts").iterdir():
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yield child.name
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def read_text(self, path: InfoPath) -> str:
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content = self._dist.read_text(str(path))
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if content is None:
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raise FileNotFoundError(path)
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return content
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def iter_entry_points(self) -> Iterable[BaseEntryPoint]:
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# importlib.metadata's EntryPoint structure sasitfies BaseEntryPoint.
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return self._dist.entry_points
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@property
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def metadata(self) -> email.message.Message:
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return self._dist.metadata
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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.
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"""
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content = self._dist.read_text("requires.txt")
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if content is None:
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return
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extra = marker = "" # Section-less entries don't have markers.
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for line in content.splitlines():
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line = line.strip()
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if not line or line.startswith("#"): # Comment; ignored.
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continue
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if line.startswith("[") and line.endswith("]"): # A section header.
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extra, _, marker = line.strip("[]").partition(":")
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continue
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yield RequiresEntry(requirement=line, extra=extra, marker=marker)
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def _iter_egg_info_extras(self) -> Iterable[str]:
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"""Get extras from the egg-info directory."""
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known_extras = {""}
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for entry in self._iter_requires_txt_entries():
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if entry.extra in known_extras:
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continue
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known_extras.add(entry.extra)
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yield entry.extra
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def iter_provided_extras(self) -> Iterable[str]:
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iterator = (
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self._dist.metadata.get_all("Provides-Extra")
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or self._iter_egg_info_extras()
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)
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return (safe_extra(extra) for extra in iterator)
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def _iter_egg_info_dependencies(self) -> Iterable[str]:
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"""Get distribution dependencies from the egg-info directory.
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To ease parsing, this converts a legacy dependency entry into a PEP 508
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requirement string. Like ``_iter_requires_txt_entries()``, there is code
|
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in ``importlib.metadata`` that does mostly the same, but not do exactly
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what we need.
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|
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Namely, ``importlib.metadata`` does not normalize the extra name before
|
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putting it into the requirement string, which causes marker comparison
|
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to fail because the dist-info format do normalize. This is consistent in
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all currently available PEP 517 backends, although not standardized.
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"""
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for entry in self._iter_requires_txt_entries():
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if entry.extra and entry.marker:
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marker = f'({entry.marker}) and extra == "{safe_extra(entry.extra)}"'
|
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elif entry.extra:
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marker = f'extra == "{safe_extra(entry.extra)}"'
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||||
elif entry.marker:
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marker = entry.marker
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else:
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marker = ""
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if marker:
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yield f"{entry.requirement} ; {marker}"
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else:
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yield entry.requirement
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|
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def iter_dependencies(self, extras: Collection[str] = ()) -> Iterable[Requirement]:
|
||||
req_string_iterator = (
|
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self._dist.metadata.get_all("Requires-Dist")
|
||||
or self._iter_egg_info_dependencies()
|
||||
)
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||||
contexts: Sequence[Dict[str, str]] = [{"extra": safe_extra(e)} for e in extras]
|
||||
for req_string in req_string_iterator:
|
||||
req = Requirement(req_string)
|
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if not req.marker:
|
||||
yield req
|
||||
elif not extras and req.marker.evaluate({"extra": ""}):
|
||||
yield req
|
||||
elif any(req.marker.evaluate(context) for context in contexts):
|
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yield req
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@ -0,0 +1,163 @@
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import functools
|
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import importlib.metadata
|
||||
import os
|
||||
import pathlib
|
||||
import sys
|
||||
import zipfile
|
||||
import zipimport
|
||||
from typing import Iterator, List, Optional, Sequence, Set, Tuple
|
||||
|
||||
from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
|
||||
|
||||
from pip._internal.metadata.base import BaseDistribution, BaseEnvironment
|
||||
from pip._internal.utils.deprecation import deprecated
|
||||
|
||||
from ._compat import BasePath, get_dist_name, get_info_location
|
||||
from ._dists import Distribution
|
||||
|
||||
|
||||
class _DistributionFinder:
|
||||
"""Finder to locate distributions.
|
||||
|
||||
The main purpose of this class is to memoize found distributions' names, so
|
||||
only one distribution is returned for each package name. At lot of pip code
|
||||
assumes this (because it is setuptools's behavior), and not doing the same
|
||||
can potentially cause a distribution in lower precedence path to override a
|
||||
higher precedence one if the caller is not careful.
|
||||
|
||||
Eventually we probably want to make it possible to see lower precedence
|
||||
installations as well. It's useful feature, after all.
|
||||
"""
|
||||
|
||||
FoundResult = Tuple[importlib.metadata.Distribution, Optional[BasePath]]
|
||||
|
||||
def __init__(self) -> None:
|
||||
self._found_names: Set[NormalizedName] = set()
|
||||
|
||||
def _find_impl(self, location: str) -> Iterator[FoundResult]:
|
||||
"""Find distributions in a location."""
|
||||
# To know exactly where we find a distribution, we have to feed in the
|
||||
# paths one by one, instead of dumping the list to importlib.metadata.
|
||||
for dist in importlib.metadata.distributions(path=[location]):
|
||||
normalized_name = canonicalize_name(get_dist_name(dist))
|
||||
if normalized_name in self._found_names:
|
||||
continue
|
||||
self._found_names.add(normalized_name)
|
||||
info_location = get_info_location(dist)
|
||||
yield dist, info_location
|
||||
|
||||
def find(self, location: str) -> Iterator[BaseDistribution]:
|
||||
"""Find distributions in a location.
|
||||
|
||||
The path can be either a directory, or a ZIP archive.
|
||||
"""
|
||||
for dist, info_location in self._find_impl(location):
|
||||
if info_location is None:
|
||||
installed_location: Optional[BasePath] = None
|
||||
else:
|
||||
installed_location = info_location.parent
|
||||
yield Distribution(dist, info_location, installed_location)
|
||||
|
||||
def find_linked(self, location: str) -> Iterator[BaseDistribution]:
|
||||
"""Read location in egg-link files and return distributions in there.
|
||||
|
||||
The path should be a directory; otherwise this returns nothing. This
|
||||
follows how setuptools does this for compatibility. The first non-empty
|
||||
line in the egg-link is read as a path (resolved against the egg-link's
|
||||
containing directory if relative). Distributions found at that linked
|
||||
location are returned.
|
||||
"""
|
||||
path = pathlib.Path(location)
|
||||
if not path.is_dir():
|
||||
return
|
||||
for child in path.iterdir():
|
||||
if child.suffix != ".egg-link":
|
||||
continue
|
||||
with child.open() as f:
|
||||
lines = (line.strip() for line in f)
|
||||
target_rel = next((line for line in lines if line), "")
|
||||
if not target_rel:
|
||||
continue
|
||||
target_location = str(path.joinpath(target_rel))
|
||||
for dist, info_location in self._find_impl(target_location):
|
||||
yield Distribution(dist, info_location, path)
|
||||
|
||||
def _find_eggs_in_dir(self, location: str) -> Iterator[BaseDistribution]:
|
||||
from pip._vendor.pkg_resources import find_distributions
|
||||
|
||||
from pip._internal.metadata import pkg_resources as legacy
|
||||
|
||||
with os.scandir(location) as it:
|
||||
for entry in it:
|
||||
if not entry.name.endswith(".egg"):
|
||||
continue
|
||||
for dist in find_distributions(entry.path):
|
||||
yield legacy.Distribution(dist)
|
||||
|
||||
def _find_eggs_in_zip(self, location: str) -> Iterator[BaseDistribution]:
|
||||
from pip._vendor.pkg_resources import find_eggs_in_zip
|
||||
|
||||
from pip._internal.metadata import pkg_resources as legacy
|
||||
|
||||
try:
|
||||
importer = zipimport.zipimporter(location)
|
||||
except zipimport.ZipImportError:
|
||||
return
|
||||
for dist in find_eggs_in_zip(importer, location):
|
||||
yield legacy.Distribution(dist)
|
||||
|
||||
def find_eggs(self, location: str) -> Iterator[BaseDistribution]:
|
||||
"""Find eggs in a location.
|
||||
|
||||
This actually uses the old *pkg_resources* backend. We likely want to
|
||||
deprecate this so we can eventually remove the *pkg_resources*
|
||||
dependency entirely. Before that, this should first emit a deprecation
|
||||
warning for some versions when using the fallback since importing
|
||||
*pkg_resources* is slow for those who don't need it.
|
||||
"""
|
||||
if os.path.isdir(location):
|
||||
yield from self._find_eggs_in_dir(location)
|
||||
if zipfile.is_zipfile(location):
|
||||
yield from self._find_eggs_in_zip(location)
|
||||
|
||||
|
||||
@functools.lru_cache(maxsize=None) # Warn a distribution exactly once.
|
||||
def _emit_egg_deprecation(location: Optional[str]) -> None:
|
||||
deprecated(
|
||||
reason=f"Loading egg at {location} is deprecated.",
|
||||
replacement="to use pip for package installation.",
|
||||
gone_in=None,
|
||||
)
|
||||
|
||||
|
||||
class Environment(BaseEnvironment):
|
||||
def __init__(self, paths: Sequence[str]) -> None:
|
||||
self._paths = paths
|
||||
|
||||
@classmethod
|
||||
def default(cls) -> BaseEnvironment:
|
||||
return cls(sys.path)
|
||||
|
||||
@classmethod
|
||||
def from_paths(cls, paths: Optional[List[str]]) -> BaseEnvironment:
|
||||
if paths is None:
|
||||
return cls(sys.path)
|
||||
return cls(paths)
|
||||
|
||||
def _iter_distributions(self) -> Iterator[BaseDistribution]:
|
||||
finder = _DistributionFinder()
|
||||
for location in self._paths:
|
||||
yield from finder.find(location)
|
||||
for dist in finder.find_eggs(location):
|
||||
# _emit_egg_deprecation(dist.location) # TODO: Enable this.
|
||||
yield dist
|
||||
# This must go last because that's how pkg_resources tie-breaks.
|
||||
yield from finder.find_linked(location)
|
||||
|
||||
def get_distribution(self, name: str) -> Optional[BaseDistribution]:
|
||||
matches = (
|
||||
distribution
|
||||
for distribution in self.iter_all_distributions()
|
||||
if distribution.canonical_name == canonicalize_name(name)
|
||||
)
|
||||
return next(matches, None)
|
||||
Reference in New Issue
Block a user