41 lines
1.7 KiB
Diff
41 lines
1.7 KiB
Diff
From 0d6dde67a01878b0d708b4216e2b31f1c76544fb Mon Sep 17 00:00:00 2001
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From: "Bernhard M. Wiedemann" <bwiedemann@suse.de>
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Date: Sat, 25 Feb 2017 06:42:28 +0100
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Subject: [PATCH] allow for reproducible builds of python packages
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See https://reproducible-builds.org/ for why this is good
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and https://reproducible-builds.org/specs/source-date-epoch/
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for the definition of this variable.
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Background:
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In some distributions like openSUSE, binary rpms contain precompiled .pyc files.
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And packages like amqp or twisted dynamically generate .py files at build time
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so those have the current time and that timestamp gets embedded
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into the .pyc file header.
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When we then adapt file timestamps in rpms to be constant,
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the timestamp in the .pyc header will no more match
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the .py timestamp in the filesystem.
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The software will still work, but it will not use the .pyc file as it should.
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---
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Lib/py_compile.py | 4 ++++
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1 file changed, 4 insertions(+)
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Index: Python-3.6.15/Lib/py_compile.py
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===================================================================
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--- Python-3.6.15.orig/Lib/py_compile.py
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+++ Python-3.6.15/Lib/py_compile.py
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@@ -137,6 +137,13 @@ def compile(file, cfile=None, dfile=None
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except FileExistsError:
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pass
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source_stats = loader.path_stats(file)
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+ sde = os.environ.get('SOURCE_DATE_EPOCH')
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+ if sde and source_stats['mtime'] > int(sde):
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+ source_stats['mtime'] = int(sde)
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+ try:
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+ os.utime(file, (source_stats['mtime'], source_stats['mtime']))
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+ except PermissionError:
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+ pass
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bytecode = importlib._bootstrap_external._code_to_bytecode(
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code, source_stats['mtime'], source_stats['size'])
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mode = importlib._bootstrap_external._calc_mode(file)
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