[Python-modules-team] Bug#820895: sphinx: please extend SOURCE_DATE_EPOCH support

[Alexis Bienvenüe]

Source: sphinx
Version: 1.3.6-2
Severity: wishlist
Tags: patch upstream
User: reproducible-builds at lists.alioth.debian.org
Usertags: toolchain
X-Debbugs-Cc: reproducible-builds at lists.alioth.debian.org

Dear Maintainer,

While working on the “reproducible builds” effort [1], we have noticed
that, even though sphinx honours the SOURCE_DATE_EPOCH environment
variable [2], this support is still incomplete: default copyright year
and gettext don't use it.

Various packages (eg. fabric, guidata) that build-depend on sphinx use a
conf.py that sets the copyright year from current time, like

  copyright = u'2006-%s, Author' % time.strftime('%Y')

This also breaks reproducibility of the building process.

The attached patch extends the SOURCE_DATE_EPOCH support in copyright
year and gettext, and corrects copyright strings that does not
corresponds to SOURCE_DATE_EPOCH, so that affected packages can be built
reproducibly without any change.

Regards,
Alexis Bienvenüe.

[1] https://wiki.debian.org/ReproducibleBuilds
[2] https://reproducible-builds.org/specs/source-date-epoch/


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