+ CONVERTTOOL=convert
+fi
+
+if [[ -z $FINDCOMMAND ]]; then
+ FINDCOMMAND=find
+fi
+
+if [[ -z $XARGSCOMMAND ]]; then
+ XARGSCOMMAND=xargs
+fi
+
+if [[ -z $ECHOCOMMAND ]]; then
+ ECHOCOMMAND=echo
+fi
+
+if [[ -z $SORTCOMMAND ]]; then
+ SORTCOMMAND=sort
+fi
+
+if [[ -z $IDENTIFYCOMMAND ]]; then
+ IDENTIFYCOMMAND=identify
+fi
+
+if [[ -z $HEADCOMMAND ]]; then
+ HEADCOMMAND=head