On 12/4/25 22:00, Ross Burton wrote:
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On 21 Nov 2025, at 05:46, Changqing Li via
lists.openembedded.org<[email protected]> wrote:
No, there is no .bbappend. Here is how to reproduce it:
we have a git repo, which contains downloades sources, which contains jquery's
sources: ${BP}.js, ${BP}.min.js, ${BP}.min.map .
Create project under path A, and clone source_mirror under A/sources_mirror,
and set A/sources_mirror as the first PREMIRRORS
Create another project under path B, and clone source_mirror under
B/sources_mirror, and set B/sources_mirror as the first PREMIRRORS
In this way, since jquery sources are fetched by git, the files mtime is the
current time when the files are checking out. So files mtime in project A is
different with project B.
Then bitabke jquery under A and B get different rpm package, the different part is
"Build Date", which is get from source_date_epoch.
According to logic of get_source_date_epoch, source_date_epoch of project will
set to the youngest file of the sources.
in this case, unstable files mtime cause unstable source_date_epoch.
I agree with others on this thread: the fetcher expects that mtimes are
preserved, but putting the mirror into a git repository for distribution
doesn’t preserve mtimes. The problem here is using git, not the fetcher. This
is a relatively niche problem because most upstreams are tarballs or git repos,
so the problem doesn’t affect them.
There are tools to deal with this problem, for example metastore
(https://github.com/przemoc/metastore) which tracks timestamps.
(also, we’re only shipping jquery for diffoscope, we can improve the packaging
here)
Thanks. There is another patch for this issue.
https://git.openembedded.org/openembedded-core/commit/?h=master-next&id=7a47c786e98c16c384c6872a662dd3142e7ee9d6
//Changqing
Ross
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