Bug#1005029: ltsp: please make the build reproducible

[Chris Lamb]

Source: ltsp
Version: 22.01-1
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

Hi,

Whilst working on the Reproducible Builds effort [0] we noticed that
ltsp could not be built reproducibly.

Whilst ltsp does use the date provided by SOURCE_DATE_EPOCH, when
converting this to a text string it takes into account the current
timezone. A patch is therefore attached that simply passes --utc to
date(1) so that the date in the generated manpages is timezone
agnostic.

 [0] https://reproducible-builds.org/


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
-------------- next part --------------
--- a/debian/patches/reproducible-build.patch	1969-12-31 16:00:00.000000000 -0800
--- b/debian/patches/reproducible-build.patch	2022-02-05 11:05:15.577723278 -0800
@@ -0,0 +1,15 @@
+Description: Make the build reproducible
+Author: Chris Lamb <lamby at debian.org>
+Last-Update: 2022-02-05
+
+--- ltsp-22.01.orig/docs/Makefile.sh
++++ ltsp-22.01/docs/Makefile.sh
+@@ -212,7 +212,7 @@ main() {
+         _VERSION=$(. ../ltsp/common/ltsp/55-ltsp.sh && echo "$_VERSION")
+     fi
+     if [ -n "$SOURCE_DATE_EPOCH" ]; then
+-        _DATE=$(date -d"@$SOURCE_DATE_EPOCH" "+%Y-%m-%d")
++        _DATE=$(date -u -d"@$SOURCE_DATE_EPOCH" "+%Y-%m-%d")
+     else
+         _DATE=$(date "+%Y-%m-%d")
+     fi
--- a/debian/patches/series	2022-02-05 10:55:53.098635739 -0800
--- b/debian/patches/series	2022-02-05 11:05:14.469724095 -0800
@@ -0,0 +1 @@
+reproducible-build.patch