Fix qchess/update.sh

Accidentally bashed self in foot

qchess/update.sh

@@ -2,6 +2,8 @@
 
 # I still can't believe I am doing this
 
+# (This can't be done with gnu make, because of circular dependency issues)
+
 target=qchess.py
 components="piece.py board.py player.py thread_util.py game.py graphics.py main.py"
 # The below seems nicer, but doesn't work because things need to be imported in the right order :(
@@ -13,22 +15,52 @@ footer="# EOF - created from update.sh on $(date)"
 
 
 # If the target was modified more recently than any of the components, update the component file
-target_mod=$(stat -c %Y $target)
+target_mod=$(stat -c %Y $target 2>/dev/null)
+
+if [ $? -ne 0 ]; then
+	merge_required=true
+else
+	merge_required=false
 
-merge_required=false
+	for f in $components; do
+		
+		component_mod=$(stat -c %Y $f 2>/dev/null)
+		if [ $? -ne 0 ]; then
+			update_required=true
+		elif [ $component_mod -lt $target_mod ]; then
+			update_required=true
+		else
+			update_required=false
+		fi
 
-for f in $components; do
-	if [ $(stat -c %Y $f) -lt $target_mod ]; then
-		nawk "/+++ $f +++/, /--- $f ---/" $target | grep -v "+++ $f +++" | grep -v "\--- $f ---" > $f
-	else
-		merge_required=true
-done
+		if $update_required; then
+			echo "$0 - update $f from $target"
+			sanity=$(egrep "(+++ $f +++)|(--- $f ---)" $target | wc -l)
+			if [ $sanity -ne 2 ]; then
+				$(echo "$0 - $target does not have markers for $f in it!") 1>&2
+				exit 1
+			fi
+			cp $f $f~
+			new_contents=$(nawk "/+++ $f +++/, /--- $f ---/" $target | grep -v "+++ $f +++" | grep -v "\--- $f ---")
+			
+			echo "$new_contents" > $f
+		else
+			echo "$0 - $f is newer than $target"
+			merge_required=true
+		fi
+	done
+fi
 
+# If any components were modified more recently than the target, merge the components into the target
 if $merge_required; then
 	echo $header > $target
 	for f in $components; do
-		cat $components >> $target
+		echo "$0 - merge $f into $target"
+		echo "# +++ $f +++ #" >> $target
+		cat $f >> $target
+		echo "# --- $f --- #" >> $target
 	done
 
-	echo $footer > $target
+	echo $footer >> $target
+	chmod u+x $target
 fi