Source: gnu-standards
Severity: normal
Tags: patch
User: reproducible-bui...@lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-b...@lists.alioth.debian.org

The build timestamp is embedded in various .dvi files:

  
https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/diffoscope-results/gnu-standards.html

  /usr/share/doc/gnu-standards/maintain.dvi.gz

  ··TeX·output·2022.
vs.
  ··TeX·output·2021.

  ··09.23:2204......
vs.
  ··08.22:1745......

The attached patch fixes this by setting FORCE_SOURCE_DATE=1 in
debian/rules, which texlive needs in order to respect SOURCE_DATE_EPOCH,
which is set during debian package builds to the timestamp in the latest
debian/changelog entry.

  https://reproducible-builds.org/docs/source-date-epoch/

With this patch applied, gnu-standards should build reproducibly on
tests.reproducible-builds.org

Thanks for maintaining gnu-standards!

live well,
  vagrant
From bf0d87b0b24f1372eedb1fcb885488acb7a3acc6 Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagr...@reproducible-builds.org>
Date: Sun, 3 Oct 2021 17:05:34 +0000
Subject: [PATCH] debian/rules: Export FORCE_SOURCE_DATE=1 in order for texlive
 to respect SOURCE_DATE_EPOCH when generating .dvi file.

https://reproducible-builds.org/docs/source-date-epoch/
---
 debian/rules | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/debian/rules b/debian/rules
index a8f6c74..2181658 100755
--- a/debian/rules
+++ b/debian/rules
@@ -8,6 +8,9 @@
 
 DOCUMENTS = standards.texi maintain.texi
 
+# Ensure texlive respects SOURCE_DATE_EPOCH
+export FORCE_SOURCE_DATE=1
+
 build: build-stamp
 build-stamp:
 	dh_testdir
-- 
2.33.0

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