[Reproducible-builds] Bug#793005: checkpw: please make the build reproducible

[Maria Valentina Marin]

Source: checkpw
Version: 1.02-1.1
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 checkpw 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 checkpw-1.02/debian/changelog checkpw-1.02/debian/changelog
--- checkpw-1.02/debian/changelog
+++ checkpw-1.02/debian/changelog
@@ -1,3 +1,10 @@
+checkpw (1.02-1.2) 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 00:06:55 +0200
+
 checkpw (1.02-1.1) unstable; urgency=high
 
   * Non-maintainer upload.
diff -u checkpw-1.02/debian/rules checkpw-1.02/debian/rules
--- checkpw-1.02/debian/rules
+++ checkpw-1.02/debian/rules
@@ -7,6 +7,7 @@
 
 DIET_ARCHS =alpha amd64 arm hppa i386 ia64 mips mipsel powerpc ppc64 s390 sparc
 ARCH ?=$(shell dpkg-architecture -qDEB_HOST_ARCH)
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
 
 ifneq (,$(findstring diet,$(DEB_BUILD_OPTIONS)))
   CC =diet -v -Os gcc
@@ -79,6 +80,8 @@
 binary-arch: deb-checkdir deb-checkuid install checkpw.deb
 	test '$(CC)' != 'gcc' || dpkg-shlibdeps '$(DIR)'/usr/bin/*
 	dpkg-gencontrol -isp -pcheckpw -P'$(DIR)'
+	find '$(DIR)' -newermt '$(BUILD_DATE)' -print0 | \
+		xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	dpkg -b '$(DIR)' ..
 
 binary: binary-indep binary-arch