diff options
Diffstat (limited to 'dev-python/pycparser/files/pycparser-2.21-lextab-cache.patch')
| -rw-r--r-- | dev-python/pycparser/files/pycparser-2.21-lextab-cache.patch | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/dev-python/pycparser/files/pycparser-2.21-lextab-cache.patch b/dev-python/pycparser/files/pycparser-2.21-lextab-cache.patch deleted file mode 100644 index d24999e7273a..000000000000 --- a/dev-python/pycparser/files/pycparser-2.21-lextab-cache.patch +++ /dev/null @@ -1,66 +0,0 @@ -From 35a279ecb9af41a6f95ddbc6a0f1beaa2472d165 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Micha=C5=82=20G=C3=B3rny?= <mgorny@gentoo.org> -Date: Sun, 26 Feb 2023 01:04:34 +0100 -Subject: [PATCH] _build_tables: Invalidate cache before importing generated - modules (#494) - -Make sure to invalidate finder caches before trying to import generated -modules. This is necessary according to the Python documentation: -https://docs.python.org/3/library/importlib.html#importlib.invalidate_caches - -This fixes a hard-to-reproduce bug that Python would be unable to find -just-generated `lextab.py` if mtime of the current directory did not -change from the moment the script was started. This could -e.g. be the case if one has second-precision timestamps and removes -the generated file just before starting the build, e.g.: - - $ rm pycparser/lextab.py; python -m build -nw - -It could also be reproduced easier by doing something like: - - $ cd pycparser - $ touch .; python -B _build_tables.py - Traceback (most recent call last): - File "/var/tmp/pycparser/pycparser/_build_tables.py", line 38, in <module> - import lextab - ModuleNotFoundError: No module named 'lextab' - -This is because the first command (`rm` or `touch`) updates the mtime -of the directory to the current time. If the script is run fast enough, -it manages to scan the directory and then write the new `lextab.py` -within the same second. As a result, mtime of the directory after -writing the new file is the same as when the script was started, finder -does not invalidate the cache and assumes that `lextab.py` does not -exist since it did not exist when the directory was scanned earlier. - -This potentially fixes #493. - -It was originally reported on https://bugs.gentoo.org/701878. -Thanks to Gary E. Miller for patience in reproducing the problem -and proxy-debugging it for me, as well as testing the final patch before -submission. ---- - pycparser/_build_tables.py | 3 +++ - 1 file changed, 3 insertions(+) - -diff --git a/pycparser/_build_tables.py b/pycparser/_build_tables.py -index 958381ad..4f371079 100644 ---- a/pycparser/_build_tables.py -+++ b/pycparser/_build_tables.py -@@ -13,6 +13,7 @@ - # Insert '.' and '..' as first entries to the search path for modules. - # Restricted environments like embeddable python do not include the - # current working directory on startup. -+import importlib - import sys - sys.path[0:0] = ['.', '..'] - -@@ -32,6 +33,8 @@ - - # Load to compile into .pyc - # -+importlib.invalidate_caches() -+ - import lextab - import yacctab - import c_ast |