[Reproducible-builds] Bug#792945: authbind : please make the build reproducible

[Maria Valentina Marin]

Source: authbind
Version: 3.0.3.5
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 authbind 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 authbind-2.1.1/debian/changelog authbind-2.1.1+nmu1/debian/changelog
--- authbind-2.1.1/debian/changelog	2012-06-11 00:17:19.000000000 +0200
+++ authbind-2.1.1+nmu1/debian/changelog	2015-07-15 23:42:10.000000000 +0200
@@ -1,3 +1,10 @@
+authbind (2.1.1+nmu1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Fix mtimes before building binary packages to produce reproducible output
+
+ -- akira <marivalenm at gmail.com>  Wed, 15 Jul 2015 23:40:51 +0200
+
 authbind (2.1.1) unstable; urgency=low
 
   * Manpage has an example of which files will be checked and read
diff -Nru authbind-2.1.1/debian/rules authbind-2.1.1+nmu1/debian/rules
--- authbind-2.1.1/debian/rules	2012-06-03 02:45:04.000000000 +0200
+++ authbind-2.1.1+nmu1/debian/rules	2015-07-15 23:37:33.000000000 +0200
@@ -29,6 +29,8 @@
 
 arch = $(shell dpkg --print-architecture)
 
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
+
 INSTALL = install
 INSTALL_FILE    = $(INSTALL) -p    -o root -g root  -m  644
 INSTALL_PROGRAM = $(INSTALL) -p    -o root -g root  -m  755
@@ -90,6 +92,8 @@
 	dpkg-gencontrol -isp
 	chown -R root.root debian/tmp
 	chmod -R g-ws debian/tmp
+	find debian/tmp -newermt '$(BUILD_DATE)' -print0 | \
+		xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	dpkg --build debian/tmp ..
 
 binary:	 binary-indep binary-arch