File reproducibledocs.patch of Package mp

Author: Bernhard M. Wiedemann <bwiedemann suse de>
Date: 2025-06-02

Patch Grutatxt to not add varying timestamps
into .html files and man-pages, if $SOURCE_DATE_EPOCH is set
so that we can have reproducible-builds.

This patch was done while working on reproducible builds for openSUSE.

diff --git a/grutatxt b/grutatxt
index 78e4327..6a68dcf 100755
--- a/grutatxt
+++ b/helpers/grutatxt
@@ -167,7 +167,7 @@ unless ($no_body) {
     print O "<title>$title</title>\n";
 
     printf O "<!-- converted from text by grutatxt $VERSION on %s -->\n", scalar(localtime)
-        unless $no_time_sig;
+        unless $no_time_sig or $ENV{SOURCE_DATE_EPOCH};
 
     if ($css) {
         if ($embed_css) {
diff --git a/Grutatxt.pm b/Grutatxt.pm
index cc0834d..7352fdd 100644
--- a/Grutatxt.pm
+++ b/helpers/Grutatxt.pm
@@ -1426,7 +1426,7 @@ sub _prefix
 {
     my ($gh) = @_;
 
-    $gh->_push(".TH \"$gh->{'page-name'}\" \"$gh->{'section'}\" \"" . localtime() . "\"");
+    $gh->_push(".TH \"$gh->{'page-name'}\" \"$gh->{'section'}\" \"" . localtime($ENV{SOURCE_DATE_EPOCH} || time) . "\"");
 }