File reproducible.patch of Package xroachng

Date: 2023-06-09
Author: Bernhard M. Wiedemann <bwiedemann suse de>
Subject: Allow to override build date

Allow to override build date with SOURCE_DATE_EPOCH
in order to make builds reproducible.
See https://reproducible-builds.org/ for why this is good
and https://reproducible-builds.org/specs/source-date-epoch/
for the definition of this variable.
This date call only works with GNU date.
Also use UTC/gmtime to be independent of timezone.

%B still causes variations with locales, so ISO 8601 date format is recommended.

Index: xroachng-1.0.3/simplemake.sh
===================================================================
--- xroachng-1.0.3.orig/simplemake.sh
+++ xroachng-1.0.3/simplemake.sh
@@ -66,7 +66,7 @@ $CC -o xroachng *.o $FLAGS || exit 1
 cd ..
 echo "creating man page xroachng.1 in directory $PWD:"
 version=`src/xroachng -v|awk '{print $2}'`
-sed "s'SYSTEMTHEMES'$PKGDATADIR/xroachng/themes/*';s/VERSION/$version/;s/DATE/`date +'%B %Y'`/" < xroachng.1.tmpl > xroachng.1
+sed "s'SYSTEMTHEMES'$PKGDATADIR/xroachng/themes/*';s/VERSION/$version/;s/DATE/`date -u -d @${SOURCE_DATE_EPOCH:-$(date +%s)} +'%B %Y'`/" < xroachng.1.tmpl > xroachng.1
 
 echo
 echo " ***********************************************************************"
Index: xroachng-1.0.3/Makefile.am
===================================================================
--- xroachng-1.0.3.orig/Makefile.am
+++ xroachng-1.0.3/Makefile.am
@@ -11,7 +11,7 @@ EXTRA_DIST = \
 man_MANS = xroachng.1
 
 xroachng.1: xroachng.1.tmpl
-	sed "s/VERSION/$(VERSION)/;s/DATE/`date +'%B %Y'`/" < $< > $@
+	sed "s/VERSION/$(VERSION)/;s/DATE/`date -u -d @${SOURCE_DATE_EPOCH:-$(date +%s)} +'%B %Y'`/" < $< > $@
 
 CLEANFILES = xroachng.1
 
Index: xroachng-1.0.3/Makefile.in
===================================================================
--- xroachng-1.0.3.orig/Makefile.in
+++ xroachng-1.0.3/Makefile.in
@@ -868,7 +868,7 @@ uninstall-man: uninstall-man1
 
 
 xroachng.1: xroachng.1.tmpl
-	sed "s/VERSION/$(VERSION)/;s/DATE/`date +'%B %Y'`/" < $< > $@
+	sed "s/VERSION/$(VERSION)/;s/DATE/`date -u -d @${SOURCE_DATE_EPOCH:-$(date +%s)} +'%B %Y'`/" < $< > $@
 
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.