[Reproducible-builds] Bug#792998: chiark-utils: please make the build reproducible

[Maria Valentina Marin]

Source: chiark-utils
Version: 4.4.2
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 chiark-utils  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 chiark-utils-4.4.2/debian/changelog chiark-utils-4.4.2+nmu1/debian/changelog
--- chiark-utils-4.4.2/debian/changelog	2014-12-21 16:14:10.000000000 +0100
+++ chiark-utils-4.4.2+nmu1/debian/changelog	2015-07-17 00:14:23.000000000 +0200
@@ -1,3 +1,10 @@
+chiark-utils (4.4.2+nmu1) 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 00:14:00 +0200
+
 chiark-utils (4.4.2) unstable; urgency=low
 
   Copyright licencing fixes:
diff -Nru chiark-utils-4.4.2/debian/rules chiark-utils-4.4.2+nmu1/debian/rules
--- chiark-utils-4.4.2/debian/rules	2014-10-26 15:20:47.000000000 +0100
+++ chiark-utils-4.4.2+nmu1/debian/rules	2015-07-17 00:13:56.000000000 +0200
@@ -9,6 +9,8 @@
 packages_arch=	chiark-rwbuffer chiark-really chiark-utils-bin
 packages=	$(packages_indep) $(packages_arch)
 
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
+
 cwd=	$(shell pwd)
 d=	$(cwd)/debian
 t=	$d/tmp
@@ -113,6 +115,8 @@
 	chown -R root.root debian/tmp
 	chmod -R g-ws debian/tmp
 	debian/rules binary-hook-$p
+	find $t/$p -newermt '$(BUILD_DATE)' -print0 | \
+		xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	dpkg --build $t/$p ..
 
 binary-indep:	checkroot build binary-prep