Adding inline help

scripts/backup.sh

@@ -8,7 +8,7 @@ DATA_DIR=$(pwd)/data
 MAX_NUM=0
 VERBOSE=0
 
-while getopts ":r:b:d:vxn:" opt
+while getopts ":r:b:d:vxn:h" opt
 do
     case ${opt} in
         r)
@@ -29,6 +29,11 @@ do
         x)
             set -x
             ;;
+        h)
+            echo "Usage: $0 [-r <repository url>] [-b <branch>] [-d <absolute path dest>] [-n <num>] [-v] [-x] [-h]"
+            echo "Ex: $0 -r $REPOSITORY -b $BRANCH -d $DATA_DIR"
+            exit 0
+            ;;
         ?)
             echo "Invalid option -${OPTARG}"
             exit 1