Bug#1100115: font-manager: please make the build reproducible

[Chris Lamb]

Source: font-manager
Version: 0.9.4-1
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
font-manager could not be built reproducibly as it embedded timestamps
into some XML files. For example:

  ./usr/share/metainfo/com.github.FontManager.FontManager.metainfo.xml
   @@ -173,15 +173,15 @@
      </screenshots>
      <releases>
   -    <release version="0.9.4" date="2026-04-12">
   +    <release version="0.9.4" date="2025-03-11">
          <description translate="no">

A patch is attached that generates this value using SOURCE_DATE_EPOCH.

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


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
-------------- next part --------------
--- a/debian/patches/reproducible-build.patch	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/reproducible-build.patch	2025-03-11 13:12:08.368880432 +0000
@@ -0,0 +1,21 @@
+Description: Make the build reproducible
+Author: Chris Lamb <lamby at debian.org>
+Last-Update: 2025-03-11
+
+--- font-manager-0.9.4.orig/meson.build
++++ font-manager-0.9.4/meson.build
+@@ -73,8 +73,12 @@ pkglib_dir = join_paths(prefix, get_opti
+ pkglibexec_dir = join_paths(prefix, get_option('libexecdir'), meson.project_name())
+ 
+ datetime = '''
+-from datetime import date
+-print(date.today())
++import os
++import time
++print(time.strftime(
++    "%Y-%m-%d",
++    time.gmtime(int(os.environ.get('SOURCE_DATE_EPOCH', time.time())))
++))
+ '''
+ 
+ today = run_command(python, '-c', datetime, check: true).stdout().strip()
--- a/debian/patches/series	1970-01-01 01:00:00.000000000 +0100
--- b/debian/patches/series	2025-03-11 13:12:07.460876951 +0000
@@ -0,0 +1 @@
+reproducible-build.patch