[Reproducible-builds] Bug#792977: luakit: please make the build reproducible

[Maria Valentina Marin]

Source: luakit
Version: 2012.09.13-r1-4
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 luakit 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 luakit-2012.09.13-r1/debian/changelog luakit-2012.09.13-r1/debian/changelog
--- luakit-2012.09.13-r1/debian/changelog	2015-05-26 03:46:14.000000000 +0200
+++ luakit-2012.09.13-r1/debian/changelog	2015-07-14 21:45:24.000000000 +0200
@@ -1,3 +1,9 @@
+luakit (2012.09.13-r1-5) UNRELEASED; urgency=medium
+
+  * Fix mtimes before building binary packages to produce reproducible output 
+
+ -- akira <marivalenm at gmail.com>  Tue, 14 Jul 2015 21:45:01 +0200
+
 luakit (2012.09.13-r1-4) unstable; urgency=medium
 
   * Patch from Chris Lamb to make the build reproducible.
diff -Nru luakit-2012.09.13-r1/debian/rules luakit-2012.09.13-r1/debian/rules
--- luakit-2012.09.13-r1/debian/rules	2015-05-26 03:45:48.000000000 +0200
+++ luakit-2012.09.13-r1/debian/rules	2015-07-14 21:43:50.000000000 +0200
@@ -13,6 +13,8 @@
 DEB_BUILD_GNU_TYPE = $(shell dpkg-architecture -qDEB_BUILD_GNU_TYPE)
 DEB_HOST_GNU_TYPE = $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
 
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
+
 STRIP=strip
 
 ifneq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE))
@@ -81,6 +83,8 @@
 	chmod a-x debian/$(package)/usr/share/luakit/lib/lousy/*.lua
 	chown -R root:root debian/$(package)
 	chmod -R go=rX debian/$(package)
+	find debian/luakit -newermt '$(BUILD_DATE)' -print0 | \
+		xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 
 	dpkg --build debian/$(package) ..