Source: dpatch
Version: 2.0.35
Severity: wishlist
Tags: patch
User: reproducible-builds@lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-builds@lists.alioth.debian.org

Hi!

While working on the “reproducible builds” effort [1], we have noticed
that dpatch could not be built reproducibly.

The attached patch sets the mtimes of all files which are modified
during the built to the date of the last changelog entry in order to
produce files with reproducible metadata.

Cheers,
akira

[1]: https://wiki.debian.org/ReproducibleBuilds


diff -Nru dpatch-2.0.35/debian/changelog dpatch-2.0.35+nmu1/debian/changelog
--- dpatch-2.0.35/debian/changelog      2012-02-07 10:09:06.000000000 +0100
+++ dpatch-2.0.35+nmu1/debian/changelog 2015-07-17 17:32:07.000000000 +0200
@@ -1,3 +1,10 @@
+dpatch (2.0.35+nmu1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Fix mtimes before building binary packages to produce reproducible output
+
+ -- akira <marival...@gmail.com>  Fri, 17 Jul 2015 17:31:49 +0200
+
 dpatch (2.0.35) unstable; urgency=low
 
   * Mark the package Multi-Arch: foreign, thanks Riku Voipio
diff -Nru dpatch-2.0.35/debian/rules dpatch-2.0.35+nmu1/debian/rules
--- dpatch-2.0.35/debian/rules  2011-10-23 23:17:10.000000000 +0200
+++ dpatch-2.0.35+nmu1/debian/rules     2015-07-17 17:31:46.000000000 +0200
@@ -9,6 +9,8 @@
 
 DOCS           = README.History README.source README.svn-mergeWithUpstream
 
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
+
 build-dpatch:
        test -e debian/control
        ${MAKE}
@@ -72,6 +74,8 @@
        find ${DPATCH} -type f -name '*.gz' | xargs chmod 0644
        find ${DPATCH}/DEBIAN -type f | xargs chmod 0644
        dpkg-gencontrol -isp -P${DPATCH}
+       find ${DPATCH} -newermt '$(BUILD_DATE)' -print0 | \
+               xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
        dpkg --build ${DPATCH} ..
 
 binary-indep: binary-dpatch
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