# HG changeset patch
# User Bernhard M. Wiedemann <bwiedemann@suse.de>
# Date 1502609999 -7200
#      Sun Aug 13 09:39:59 2017 +0200
# Node ID a98e00eed893f62dd8349fc2894abca3aff4b33a
# Parent  41ce01b7d413b3654211da0147857e7d6a1495de
Facilitate reproducible builds
by allowing to externally hold constant the build date and time.
See
        https://reproducible-builds.org/specs/source-date-epoch/

Backport asap.

diff -r 41ce01b7d413 -r a98e00eed893 NEWS
--- a/NEWS	Sun Aug 13 09:39:56 2017 +0200
+++ b/NEWS	Sun Aug 13 09:39:59 2017 +0200
@@ -48,6 +48,12 @@
           https://github.com/akrzemi1/Optional
   where only "optional.hpp" is needed.
 
+- The environment variable SOURCE_DATE_EPOCH overrides the build
+  timestamp as recorded by the signatures.  See
+          https://reproducible-builds.org/specs/source-date-epoch/
+  for details.
+
+
 
 * Version 4.2  "Compressor Road"
 
diff -r 41ce01b7d413 -r a98e00eed893 src/DefaultSig.pm
--- a/src/DefaultSig.pm	Sun Aug 13 09:39:56 2017 +0200
+++ b/src/DefaultSig.pm	Sun Aug 13 09:39:59 2017 +0200
@@ -109,9 +109,10 @@
 sub update_date_and_time {
     my $self = shift;
 
+    my $now = $ENV{SOURCE_DATE_EPOCH} || time;
     my ($second, $minute, $hour,
         $day_of_month, $month, $year,
-        $day_of_week) = $self->is_using_gmt() ? gmtime : localtime;
+        $day_of_week) = $self->is_using_gmt() ? gmtime($now) : localtime($now);
 
     $self->{DATE} = $self->format_date($day_of_month, $month, $year + 1900, $day_of_week,
                                        $self->weekdays->[$day_of_week],
.scm'>
<input type='hidden' name='id' value='f2752d61bd80df3bd503a861d8a40f6170bd5beb'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=f2752d61bd80df3bd503a861d8a40f6170bd5beb'>root</a>/<a href='/guix/log/tests?id=f2752d61bd80df3bd503a861d8a40f6170bd5beb'>tests</a>/<a href='/guix/log/tests/profiles.scm?id=f2752d61bd80df3bd503a861d8a40f6170bd5beb'>profiles.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/profiles.scm?id=f2752d61bd80df3bd503a861d8a40f6170bd5beb&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-10-28 00:17:24 +0200'>2023-10-28</span></td><td><a href='/guix/commit/tests/profiles.scm?id=344e39c928bdb8e6b7e5ac79d94535921a414a05'>profiles: Hooks honor the #:system parameter of ‘profile-derivation’.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://issues.guix.gnu.org/65225&gt;.

* guix/profiles.scm (info-dir-file, package-cache-file)
(info-dir-file, ghc-package-cache-file, ca-certificate-bundle)
(emacs-subdirs, gdk-pixbuf-loaders-cache-file, glib-schemas)
(gtk-icon-themes, gtk-im-modules, linux-module-database)
(xdg-desktop-database, xdg-mime-database, fonts-dir-file)
(manual-database, manual-database/optional): Add optional #:system
parameter and pass it to ‘gexp-&gt;derivation’.
(profile-derivation): Pass HOOK a second parameter, SYSTEM.
* gnu/bootloader.scm (efi-bootloader-profile)[efi-bootloader-profile-hook]:
Add optional #:system parameter and pass it to ‘gexp-&gt;derivation’.
* guix/channels.scm (package-cache-file): Likewise.
* tests/profiles.scm ("profile-derivation, #:system, and hooks"): New
test.

Reported-by: Tobias Geerinckx-Rice &lt;me@tobias.gr&gt;
</span></span></td><td>Ludovic Courtès</td></tr>