[bug-gettext] [PATCH] Please respect SOURCE_DATE_EPOCH wen generating ChangeLog entries

[Chris Lamb]

Hi,

Whilst working on the "reproducible builds" effort [0], we noticed that
the gettextize tool generates ChangeLog files and entries which include
the current date, rendering generated builds unreproducible (eg. avahi
et al). The timestamps are also additionally timezone-specific.

The attached patch modifies gettextize to respect SOURCE_DATE_EPOCH[1]
if available. I have a GNU contributor agreement (la...@gnu.org)

 [0] https://wiki.debian.org/ReproducibleBuilds
 [1] https://reproducible-builds.org/specs/source-date-epoch/


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      la...@debian.org / chris-lamb.co.uk
       `-

diff --git a/gettext-tools/misc/gettextize.in b/gettext-tools/misc/gettextize.in
index a4a77f4..0d40d29 100644
--- a/gettext-tools/misc/gettextize.in
+++ b/gettext-tools/misc/gettextize.in
@@ -398,7 +398,7 @@ please=
 
 # Variable:
 # - date            current date, for use in ChangeLog entries.
-date=`date --utc +%Y-%m-%d`
+date=`date --utc --date="@${SOURCE_DATE_EPOCH:-$(date +%s)}" +%Y-%m-%d`
 
 # func_copy from to
 # copies a file.