docs: More help/usage

scripts/backup.sh

@@ -45,8 +45,22 @@ do
             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"
+            echo "Usage: $0 [-r <repository url>] [-b <branch>] [-d <path dest>] [-n <num>] [-v] [-x] [-i] [-h]"
+            echo
+            echo "Ex: $0 \\"
+            echo "      -r $REPOSITORY \\"
+            echo "      -b $BRANCH \\"
+            echo "      -d $DATA_DIR"
+            echo
+            echo "Available flags:"
+            echo "      -r <repository url> - set remote repository url (suffixed by .git) to backup"
+            echo "      -b <branch> - branch to backup"
+            echo "      -d </path/to/path> - where to backup; relative or absolute"
+            echo "      -n <num> - number of commit to backup (default: unlimited)"
+            echo "      -i - ignore tracking information - to restart from scratch"
+            echo "      -v - verbose mode"
+            echo "      -x - debug mode"
+            echo "      -h - this help"
             exit 0
             ;;
         ?)