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gh-116811: Ensure MetadataPathFinder.invalidate_caches is reachable when delegated through PathFinder. (#116812) 

* Make MetadataPathFinder a proper classmethod.

* In PathFinder.invalidate_caches, also invoke MetadataPathFinder.invalidate_caches.

* Add blurb
This commit is contained in:
Jason R. Coombs 2024-03-14 17:59:00 -04:00 committed by GitHub
parent be59aaf3ab
commit 5f52d20a93
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3
Lib/importlib/_bootstrap_external.py
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@ -1470,6 +1470,9 @@ class PathFinder:
# https://bugs.python.org/issue45703 # https://bugs.python.org/issue45703
_NamespacePath._epoch += 1 _NamespacePath._epoch += 1
from importlib.metadata import MetadataPathFinder
MetadataPathFinder.invalidate_caches()
@staticmethod @staticmethod
def _path_hooks(path): def _path_hooks(path):
"""Search sys.path_hooks for a finder for 'path'.""" """Search sys.path_hooks for a finder for 'path'."""

1
Lib/importlib/metadata/__init__.py
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@ -797,6 +797,7 @@ class MetadataPathFinder(DistributionFinder):
path.search(prepared) for path in map(FastPath, paths) path.search(prepared) for path in map(FastPath, paths)
) )
@classmethod
def invalidate_caches(cls) -> None: def invalidate_caches(cls) -> None:
FastPath.__new__.cache_clear() FastPath.__new__.cache_clear()

2
Misc/NEWS.d/next/Library/2024-03-14-10-01-23.gh-issue-116811._h5iKP.rst Normal file
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@ -0,0 +1,2 @@
In ``PathFinder.invalidate_caches``, delegate to
``MetadataPathFinder.invalidate_caches``.