From 3cb141cbaf6a29c81ea464e555df33eaa8a75eec Mon Sep 17 00:00:00 2001
From: Frank Lichtenheld <frank@lichtenheld.de>
Date: Sat, 20 Oct 2007 21:24:08 +0200
Subject: [PATCH] 500update_mo: Only update .po and .pot files if needed

Don't create unneccessary diffs.
---
 cron.d/500update_mo | 47 +++++++++++++++++++++++++--------------------
 1 file changed, 26 insertions(+), 21 deletions(-)

diff --git a/cron.d/500update_mo b/cron.d/500update_mo
index 073e842..3b5c844 100755
--- a/cron.d/500update_mo
+++ b/cron.d/500update_mo
@@ -53,19 +53,13 @@ xgettext_opts="--language=Perl --keyword=N_ --keyword=_g --foreign-user --add-co
 
 echo gettextfiles=$gettextfiles
 echo templatefiles=$templatefiles
-xgettext $xgettext_opts -d pdo -o ${podir}/pdo.pot ${gettextfiles}
-$topdir/bin/ttxgettext templates ${templatefiles} >${podir}/templates.pot
-xgettext $xgettext_opts -d sections -o ${podir}/sections.pot ${libdir}/Packages/Sections.pm
-xgettext $xgettext_opts -d langs -o ${podir}/langs.pot ${libdir}/Packages/I18N/LanguageNames.pm
+xgettext $xgettext_opts -d pdo -o ${podir}/pdo.pot.new ${gettextfiles}
+$topdir/bin/ttxgettext templates ${templatefiles} >${podir}/templates.pot.new
+xgettext $xgettext_opts -d sections -o ${podir}/sections.pot.new ${libdir}/Packages/Sections.pm
+xgettext $xgettext_opts -d langs -o ${podir}/langs.pot.new ${libdir}/Packages/I18N/LanguageNames.pm
 
 cd $podir
 
-# normalize paths in .pot files
-for domain in ${podomains}
-do
-  perl -p -i -e "s,^#:\s*\Q${topdir}\E,#: .,go" ${domain}.pot
-done
-
 # Create missing po files
 #
 for lang in ${polangs}
@@ -76,20 +70,31 @@ do
   done
 done
 
-# Update po
-#
-for lang in ${polangs} 
+# normalize paths in .pot files
+for domain in ${podomains}
 do
-  for domain in ${podomains}
-  do
-    cp ${domain}.${lang}.po ${domain}.${lang}.po.tmp
-    msgmerge --previous --quiet --sort-by-file -o ${domain}.${lang}.po ${domain}.${lang}.po.tmp ${domain}.pot
-    rm ${domain}.${lang}.po.tmp
-    # normalize paths in .po files
-    perl -p -i -e "s,^#:\s*\Q${topdir}\E,#: .,go" ${domain}.${lang}.po
-  done
+  perl -p -i -e "s,^#:\s*\Q${topdir}\E,#: .,go" ${domain}.pot.new
+  if diff -I"POT-Creation-Date" -q ${domain}.pot.new ${domain}.pot >/dev/null 2>&1
+  then
+      echo "${domain}.pot unchanged"
+      rm ${domain}.pot.new
+  else
+      echo "${domain}.pot changed"
+      mv ${domain}.pot.new ${domain}.pot
+      # Update po
+      for lang in ${polangs} 
+      do
+	echo "  update ${domain}.${lang}.po"
+	cp ${domain}.${lang}.po ${domain}.${lang}.po.tmp
+	msgmerge --previous --quiet --sort-by-file -o ${domain}.${lang}.po ${domain}.${lang}.po.tmp ${domain}.pot
+	rm ${domain}.${lang}.po.tmp
+        # normalize paths in .po files
+	perl -p -i -e "s,^#:\s*\Q${topdir}\E,#: .,go" ${domain}.${lang}.po
+      done
+  fi
 done
 
+echo
 # Update mo
 #
 test -d ${localedir} || mkdir -p ${localedir}
-- 
2.39.2