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Apply changes from importlib_metadata 0.11

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This commit is contained in:
Jason R. Coombs 2019-05-10 09:11:01 -04:00
parent 071cbd4ea1
commit 21eaaf47ac
8 changed files with 73 additions and 151 deletions
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83
Lib/importlib/metadata/_hooks.py
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@ -25,12 +25,14 @@ class NullFinder(DistributionFinder):
return None
class MetadataPathBaseFinder(NullFinder):
@install
class MetadataPathFinder(NullFinder):
"""A degenerate finder for distribution packages on the file system.
This finder supplies only a find_distributions() method for versions
of Python that do not have a PathFinder find_distributions().
"""
search_template = r'{pattern}(-.*)?\.(dist|egg)-info'
def find_distributions(self, name=None, path=None):
"""Return an iterable of all Distribution instances capable of
@ -51,9 +53,15 @@ class MetadataPathBaseFinder(NullFinder):
"""
return itertools.chain.from_iterable(
cls._search_path(path, pattern)
for path in map(Path, paths)
for path in map(cls._switch_path, paths)
)
@staticmethod
def _switch_path(path):
with suppress(Exception):
return zipfile.Path(path)
return Path(path)
@classmethod
def _predicate(cls, pattern, root, item):
return re.match(pattern, str(item.name), flags=re.IGNORECASE)
@ -68,82 +76,15 @@ class MetadataPathBaseFinder(NullFinder):
if cls._predicate(matcher, root, item))
@install
class MetadataPathFinder(MetadataPathBaseFinder):
search_template = r'{pattern}(-.*)?\.(dist|egg)-info'
@install
class MetadataPathEggInfoFileFinder(MetadataPathBaseFinder):
search_template = r'{pattern}(-.*)?\.egg-info'
@classmethod
def _predicate(cls, pattern, root, item):
return (
(root / item).is_file() and
re.match(pattern, str(item.name), flags=re.IGNORECASE))
class PathDistribution(Distribution):
def __init__(self, path):
"""Construct a distribution from a path to the metadata directory."""
self._path = path
def read_text(self, filename):
with suppress(FileNotFoundError, NotADirectoryError):
with self._path.joinpath(filename).open(encoding='utf-8') as fp:
return fp.read()
return None
with suppress(FileNotFoundError, NotADirectoryError, KeyError):
return self._path.joinpath(filename).read_text(encoding='utf-8')
read_text.__doc__ = Distribution.read_text.__doc__
def locate_file(self, path):
return self._path.parent / path
@install
class WheelMetadataFinder(NullFinder):
"""A degenerate finder for distribution packages in wheels.
This finder supplies only a find_distributions() method for versions
of Python that do not have a PathFinder find_distributions().
"""
search_template = r'{pattern}(-.*)?\.whl'
def find_distributions(self, name=None, path=None):
"""Return an iterable of all Distribution instances capable of
loading the metadata for packages matching the name
(or all names if not supplied) along the paths in the list
of directories ``path`` (defaults to sys.path).
"""
if path is None:
path = sys.path
pattern = '.*' if name is None else re.escape(name)
found = self._search_paths(pattern, path)
return map(WheelDistribution, found)
@classmethod
def _search_paths(cls, pattern, paths):
return (
path
for path in map(Path, paths)
if re.match(
cls.search_template.format(pattern=pattern),
str(path.name),
flags=re.IGNORECASE,
)
)
class WheelDistribution(Distribution):
def __init__(self, archive):
self._archive = zipfile.Path(archive)
name, version = archive.name.split('-')[0:2]
self._dist_info = '{}-{}.dist-info'.format(name, version)
def read_text(self, filename):
target = self._archive / self._dist_info / filename
return target.read_text() if target.exists() else None
read_text.__doc__ = Distribution.read_text.__doc__
def locate_file(self, path):
return self._archive / path