[Reproducible-builds] Bug#792978: nec: please make the build reproducible

[Maria Valentina Marin]

Source: nec
Version: 2-16
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 nec 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 nec-2/debian/changelog nec-2/debian/changelog
--- nec-2/debian/changelog
+++ nec-2/debian/changelog
@@ -1,3 +1,10 @@
+nec (2-16.1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Fix mtimes before building binary packages to produce reproducible output 
+
+ -- akira <marivalenm at gmail.com>  Tue, 14 Jul 2015 21:55:17 +0200
+
 nec (2-16) unstable; urgency=low
   * fix spelling error in nec2small binary
   * remove duplicate priority field in control file
diff -u nec-2/debian/rules nec-2/debian/rules
--- nec-2/debian/rules
+++ nec-2/debian/rules
@@ -16,7 +16,9 @@
 
 ifeq (,$(findstring nostrip,$(DEB_BUILD_OPTIONS)))
 INSTALL_PROGRAM += -s
-endif 
+endif
+
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
 
 build:
 	$(checkdir)
@@ -99,6 +101,8 @@
 	dh_md5sums --tmpdir=debian/tmp
 	chown -R root.root debian/tmp
 	chmod -R go=rX debian/tmp
+	find debian/tmp -newermt '$(BUILD_DATE)' -print0 | \
+		xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	dpkg --build debian/tmp ..
 
 define checkdir