[Reproducible-builds] Bug#801212: unicode-data: please make the build reproducible

[Esa Peuha]

Source: unicode-data
Version: 8.0-1
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
X-Debbugs-Cc: reproducible-builds at lists.alioth.debian.org

Hi!

While working on the “reproducible builds” effort [1], we have noticed
that unicode-data could not be built reproducibly.

The attached patch sets TZ=UTC before calling unzip, ensuring that
the modification time of the extracted files will not vary depending
on the timezone of the build enviromnent. Once this patch is applied,
unicode-data can be built reproducibly.

 [1]: https://wiki.debian.org/ReproducibleBuilds
-------------- next part --------------
--- debian/rules.orig	2015-06-20 15:14:56.000000000 +0300
+++ debian/rules	2015-10-07 16:38:16.972507828 +0300
@@ -17,8 +17,8 @@
 	dh_testdir
 	mkdir -p $(SOURCE_DIR)
 	mkdir -p $(STAMP_DIR)
-	(cd $(SOURCE_DIR) && unzip ../UCD.zip )
-	(cd $(SOURCE_DIR) && unzip ../Unihan.zip )
+	(cd $(SOURCE_DIR) && TZ=UTC unzip ../UCD.zip )
+	(cd $(SOURCE_DIR) && TZ=UTC unzip ../Unihan.zip )
 	( find $(SOURCE_DIR) -name '*txt' | while read f; do \
 		tr -d \\r < $$f > tmpf  ; \
 		mv tmpf $$f ;			\