Re: [oe-core][PATCH] reproducible: fix git SOURCE_DATE_EPOCH randomness

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Fri Feb 13, 2026 at 1:42 AM CET, Randolph Sapp via lists.openembedded.org wrote:
> From: Randolph Sapp <rs@ti.com>
>
> Anything that defines multiple git sources should have the largest value
> taken when calculating the SOURCE_DATE_EPOCH for a package.
>
> The previous iteration actually introduced some degree of randomness, as
> it would stop on the first git repository reported by os.walk, which
> does not assure any specific ordering by default.
>
> Signed-off-by: Randolph Sapp <rs@ti.com>
> ---

Hi Randolph,

Thanks for trying to fix this. However, it looks like this is causing
another intermittent issue.

We got the following error on the autobuilder:

ERROR: libjitterentropy-3.6.3-r0 do_unpack: Error executing a python function in exec_func_python() autogenerated:
...
File: '/srv/pokybuild/yocto-worker/qemux86-world/build/layers/openembedded-core/meta/lib/oe/reproducible.py', lineno: 107, function: get_source_date_epoch_from_git
     0103:            bb.debug(1, "%s does not have a valid HEAD: %s" % (gitpath, p.stdout.decode('utf-8')))
     0104:            continue
     0105:
     0106:        bb.debug(1, "git repository: %s" % gitpath)
 *** 0107:        p = subprocess.run(['git', '-c', 'log.showSignature=false', '--git-dir', gitpath, 'log', '-1', '--pretty=%ct'],
     0108:                           check=True, stdout=subprocess.PIPE)
     0109:        sources_dates.append(int(p.stdout.decode('utf-8')))
     0110:
     0111:    if sources_dates:
File: '/usr/lib64/python3.13/subprocess.py', lineno: 577, function: run
     0573:            # We don't call process.wait() as .__exit__ does that for us.
     0574:            raise
     0575:        retcode = process.poll()
     0576:        if check and retcode:
 *** 0577:            raise CalledProcessError(retcode, process.args,
     0578:                                     output=stdout, stderr=stderr)
     0579:    return CompletedProcess(process.args, retcode, stdout, stderr)
     0580:
     0581:
Exception: subprocess.CalledProcessError: Command '['git', '-c', 'log.showSignature=false', '--git-dir', '/srv/pokybuild/yocto-worker/qemux86-world/build/build/tmp/work/x86-64-v3-poky-linux/libjitterentropy/3.6.3/sources/libjitterentropy-3.6.3/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/tests/raw-entropy/recording_userspace/jitterentropy/.git/', 'log', '-1', '--pretty=%ct']' returned non-zero exit status 128.


https://autobuilder.yoctoproject.org/valkyrie/#/builders/59/builds/3177
https://autobuilder.yoctoproject.org/valkyrie/#/builders/3/builds/3231
https://autobuilder.yoctoproject.org/valkyrie/#/builders/6/builds/3194
https://autobuilder.yoctoproject.org/valkyrie/#/builders/37/builds/3345

I only saw it on libjitterentropy so far. I quickly tried to reproduce
locally, without any success. Yet I confirm dropping this patch solve
the issue.

Can you have a look?

Thanks,
Mathieu

-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com