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python2.7: improve reproducibility

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The compiled .pyc files contain time stamp corresponding to the compile time.
This prevents binary reproducibility. This patch allows to achieve binary
reproducibility by overriding the build time stamp by the value
exported via SOURCE_DATE_EPOCH.

Patch by Bernhard M. Wiedemann, backported from https://github.com/python/cpython/pull/296

[YOCTO#11241]

(From OE-Core rev: 2a044f1e4f5c63e11e631b31f741c7aabfa6f601)

Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Juro Bystricky
2017-08-19 10:21:57 -07:00
committed by Richard Purdie
parent 924b536529
commit 07348bb76f
2 changed files with 35 additions and 0 deletions
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34
meta/recipes-devtools/python/python/support_SOURCE_DATE_EPOCH_in_py_compile_2.7.patch Normal file
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@@ -0,0 +1,34 @@
The compiled .pyc files contain time stamp corresponding to the compile time.
This prevents binary reproducibility. This patch allows to achieve binary
reproducibility by overriding the build time stamp by the value
exported via SOURCE_DATE_EPOCH.
Patch by Bernhard M. Wiedemann
Upstream-Status: Backport
Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
Fri Feb 24 17:08:25 UTC 2017 - bwiedemann@suse.com
- Add reproducible.patch to allow reproducible builds of various
python packages like python-amqp
Upstream: https://github.com/python/cpython/pull/296
@@ -0,0 +1,15 @@
Index: Python-2.7.13/Lib/py_compile.py
===================================================================
--- Python-2.7.13.orig/Lib/py_compile.py
+++ Python-2.7.13/Lib/py_compile.py
@@ -108,6 +108,10 @@ def compile(file, cfile=None, dfile=None
timestamp = long(os.fstat(f.fileno()).st_mtime)
except AttributeError:
timestamp = long(os.stat(file).st_mtime)
+ sde = os.environ.get('SOURCE_DATE_EPOCH')
+ if sde and timestamp > int(sde):
+ timestamp = int(sde)
+ os.utime(file, (timestamp, timestamp))
codestring = f.read()
try:
codeobject = __builtin__.compile(codestring, dfile or file,'exec')