transfer_mv safer on same directories

tools/transfer_mv

@@ -1,5 +1,10 @@
 #!/bin/bash
 
-[ ! -d "$1" ] && echo "SOURCE FOLDER $1 not reachable!" && exit -1
-rsync -a --no-inc-recursive --info=progress2 --remove-source-files "$1" "$2" && find "$1" -type d -empty -delete
+SOURCE=$(realpath "$1")
+DEST=$(realpath "$2")
 
+[ ! -d "$SOURCE" ] && echo "SOURCE FOLDER <$SOURCE> not reachable!" && exit 1
+[ ! -d "$DEST" ] && echo "DESTINATION FOLDER missing!" && exit 2
+[ "$SOURCE" == "$DEST" ] && echo "SOURCE and DESTINATION overriden!" && exit 3
+
+rsync -a --no-inc-recursive --info=progress2 --remove-source-files "$SOURCE" "$DEST" && find "$SOURCE" -type d -empty -delete