[Reproducible-builds] Bug#827361: matplotlib: please honour SOURCE_DATE_EPOCH to allow reproducible output

[Alexis Bienvenüe]

Package: matplotlib
Version: 1.5.2~rc2-1
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 some packages (like python-shapely) use matplotlib in their
building process, leading to unreproducible builds (due to the
timestamps inserted in PS/PDF files).

To solve this kind of issues, it would be nice to make matplotlib
support the SOURCE_DATE_EPOCH environment variable [2], so that the
sources last modification date can be used for the timestamps in these
PS and PDF files.

See the attached patch for a proposed solution.

Regards,
Alexis Bienvenüe.

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




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