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gh-93461: Invalidate sys.path_importer_cache entries with relative paths by tiran · Pull Request #93653 · python/cpython · GitHub
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gh-93461: Invalidate sys.path_importer_cache entries with relative paths #93653

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Merged
ambv merged 4 commits into from
Jun 10, 2022
Merged

gh-93461: Invalidate sys.path_importer_cache entries with relative paths #93653

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983288b
gh-93461: Invalidate sys.path_importer_cache entries with relative paths
tiran Jun 9, 2022
98f63aa
Fix and add test cases
tiran Jun 9, 2022
41aeca2
Use abspath for Windows
tiran Jun 10, 2022
5163c35
Don't include trailing '/.' to FileFinder path
tiran Jun 10, 2022
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gh-93461: Invalidate sys.path_importer_cache entries with relative paths
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@tiran
tiran committed Jun 9, 2022
commit 983288bdfb0aa6f4f0cc81d4bf9d5b726e2e5a61
4 changes: 3 additions & 1 deletion Lib/importlib/_bootstrap_external.py
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Expand Up @@ -1399,7 +1399,9 @@ def invalidate_caches():
"""Call the invalidate_caches() method on all path entry finders
stored in sys.path_importer_caches (where implemented)."""
for name, finder in list(sys.path_importer_cache.items()):
if finder is None:
# Drop entry if finder name is a relative path. The current
# working directory may have changed.
if finder is None or not _path_isabs(name):
del sys.path_importer_cache[name]
elif hasattr(finder, 'invalidate_caches'):
finder.invalidate_caches()
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2022-06-09-19-19-02.gh-issue-93461.5DqP1e.rst
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@@ -0,0 +1,3 @@
:func:`importlib.invalidate_caches` now drops entries from
:data:`sys.path_importer_cache` with a relative path as name. This solves a
caching issue when a process changes its current working directory.