Bug#1038970: c-munipack: reproducible-builds: date embedded in manpage

[Vagrant Cascadian]

Source: c-munipack
Severity: normal
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: timestamps locales
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

The build date is embedded in the cmunipack manpage:

  https://tests.reproducible-builds.org/debian/rb-pkg/bookworm/amd64/diffoscope-results/c-munipack.html

  ./usr/share/man/man3/cmunipack.3.gz

  .TH·cmunipack·3·"June·22,·2023"·"version·2.1.32"·"C\-Munipack·2.0"
  vs.
  .TH·cmunipack·3·"July·26,·2024"·"version·2.1.32"·"C\-Munipack·2.0"

The attached patch adds support for deterministic timestamps using the
SOURCE_DATE_EPOCH environment variable, which is exported by
dpkg-buildpackage. It also uses a numeric date that is independent of
the build environment locale.

According to my local tests, with this patch applied c-munipack should
build reproducibly on tests.reproducible-builds.org once it migrates to
debian/trixie! There is another issue with build paths that I will
submit a patch for shortly that also affects the build in unstable.

Thanks for maintaining c-munipack!

live well,
  vagrant
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