[Reproducible-builds] Bug#792953: dhcping: please make the build reproducible

[Maria Valentina Marin]

Source: dhcping
Version: 1.2-4.1
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 dhcping 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 -u dhcping-1.2/debian/changelog dhcping-1.2/debian/changelog
--- dhcping-1.2/debian/changelog
+++ dhcping-1.2/debian/changelog
@@ -1,3 +1,10 @@
+dhcping (1.2-4.2) 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 17:22:57 +0200
+
 dhcping (1.2-4.1) unstable; urgency=low
 
   * Non-maintainer upload.
diff -u dhcping-1.2/debian/rules dhcping-1.2/debian/rules
--- dhcping-1.2/debian/rules
+++ dhcping-1.2/debian/rules
@@ -24,6 +24,8 @@
 version = $(shell grep "^$(source) " debian/changelog|head -1 |sed 's/.*(\(.*\)\-[^\-]*).*/\1/g')
 revision = $(shell grep "^$(source) " debian/changelog|head -1 |sed 's/.*([^\-]*\-\(.*\)).*/\1/g')
 
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
+
 installbin = install -g root -o root -m 755
 installdoc = install -g root -o root -m 644
 
@@ -76,6 +78,8 @@
 	#
 	dpkg-shlibdeps debian/tmp/usr/sbin/dhcping
 	dpkg-gencontrol -isp
+	find debian/tmp -newermt '$(BUILD_DATE)' -print0 | \
+		xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	dpkg --build debian/tmp ..
 
 binary: binary-indep binary-arch