From c87d5c4c946d80a13b6400370ab338b8623835e5 Mon Sep 17 00:00:00 2001
From: Holger Levsen <holger@layer-acht.org>
Date: Sun, 4 Jan 2015 12:18:31 +0100
Subject: reproducible: only update meta_pkgsets if the new one aint empty

---
 bin/reproducible_create_meta_pkg_sets.sh | 34 ++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 15 deletions(-)

diff --git a/bin/reproducible_create_meta_pkg_sets.sh b/bin/reproducible_create_meta_pkg_sets.sh
index b38df355..4de36f0a 100755
--- a/bin/reproducible_create_meta_pkg_sets.sh
+++ b/bin/reproducible_create_meta_pkg_sets.sh
@@ -28,23 +28,27 @@ convert_into_source_packages_only() {
 update_if_similar() {
 	# this is mostly done to not accidently overwrite the lists
 	# with garbage, eg. when external services are down
-	TARGET=$TPATH/$1
-	if [ -f $TARGET ] ; then
-		LENGTH=$(cat $TARGET | wc -w)
-		NEWLEN=$(cat $TMPFILE | wc -w)
-		PERCENT=$(echo "$LENGTH*100/$NEWLEN"|bc)
-		if [ $PERCENT -gt 107 ] || [ $PERCENT -lt 93 ] ; then
-			mv $TMPFILE $TARGET.new
-			echo 
-			echo diff $TARGET $TARGET.new
-			diff $TARGET $TARGET.new
-			echo
-			echo "Too much difference, aborting. Please investigate and update manually."
-			exit 1
+	if [ -s $TMPFILE ] ; then
+		TARGET=$TPATH/$1
+		if [ -f $TARGET ] ; then
+			LENGTH=$(cat $TARGET | wc -w)
+			NEWLEN=$(cat $TMPFILE | wc -w)
+			PERCENT=$(echo "$LENGTH*100/$NEWLEN"|bc)
+			if [ $PERCENT -gt 107 ] || [ $PERCENT -lt 93 ] ; then
+				mv $TMPFILE $TARGET.new
+				echo
+				echo diff $TARGET $TARGET.new
+				diff $TARGET $TARGET.new
+				echo
+				echo "Too much difference, aborting. Please investigate and update manually."
+				exit 1
+			fi
 		fi
+		mv $TMPFILE $TARGET
+		echo "$(date) - $TARGET updated."
+	else
+		echo "$(date) - $TARGET not updated, $TMPFILE is empty."
 	fi
-	mv $TMPFILE $TARGET
-	echo "$(date) - $TARGET updated."
 }
 
 
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