[Reproducible-builds] Bug#825706: imagemagick: please use deterministic timestamps in pdf metadata

[Reiner Herrmann]

Source: imagemagick
Version: 8:6.8.9.9-7
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: toolchain timestamps
X-Debbugs-Cc: reproducible-builds at lists.alioth.debian.org

Hi!

While working on the "reproducible builds" effort [1], we have noticed
that imagemagick embeds the current time/date when converting images
into PDF files (CreationDate / ModDate in metadata).

The attached patch adds support for the SOURCE_DATE_EPOCH environmeht
variable [2] to replace the timestamp with a deterministic one.

Regards,
 Reiner

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