[Reproducible-builds] Bug#792959: elida: please make the build reproducible

[Maria Valentina Marin]

Source: elida
Version: 0.4+nmu1
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-builds at lists.alioth.debian.org

Hi!

While working on the “reproducible builds” effort [1], we have noticed
that elida 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


-------------- next part --------------
diff -Nru elida-0.4+nmu1/debian/changelog elida-0.4+nmu2/debian/changelog
--- elida-0.4+nmu1/debian/changelog	2010-03-19 09:55:42.000000000 +0100
+++ elida-0.4+nmu2/debian/changelog	2015-07-17 17:58:58.000000000 +0200
@@ -1,3 +1,10 @@
+elida (0.4+nmu2) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Fix mtimes before building binary packages to produce reproducible output 
+
+ -- akira <marivalenm at gmail.com>  Fri, 17 Jul 2015 17:58:37 +0200
+
 elida (0.4+nmu1) unstable; urgency=low
 
   * Non-maintainer upload to fix release goal.
diff -Nru elida-0.4+nmu1/debian/rules elida-0.4+nmu2/debian/rules
--- elida-0.4+nmu1/debian/rules	2009-07-05 05:11:47.000000000 +0200
+++ elida-0.4+nmu2/debian/rules	2015-07-17 17:58:30.000000000 +0200
@@ -3,6 +3,8 @@
 P = elida
 T = debian/tmp
 
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
+
 build:
 
 binary: binary-arch binary-indep
@@ -34,6 +36,8 @@
 	dpkg-gencontrol -isp
 	chown -R root.root $T
 	chmod -R o-s,go=u,go-ws $T
+	find debian/tmp -newermt '$(BUILD_DATE)' -print0 | \
+		xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	dpkg --build $T ..
 
 binary-arch: