Added help flag to hosto

scripts/bin/hosto

@@ -1,5 +1,20 @@
 #!/usr/bin/env bash
 
+
+function help() {
+  echo -e \
+    "Usage: $(basename $0) [OPTIONS]\n\n" \
+    "Options:\n" \
+    "   -i, --inv-file <path>       Specify the Ansible inventory to add.\n" \
+    "   -h, --help                  Show help.\n"
+}
+
+if [[ $# -eq 0 ]]; then
+  help
+  exit 1
+fi
+
+
 POSITIONAL_ARGS=()
 INVENTORY_FILE="$(pwd)/inventory"
 
@@ -10,8 +25,8 @@ while [[ $# -gt 0 ]]; do
       shift
       shift
       ;;
-    -*|--*)
-      echo "hosto: Unknown option $1"
+    -h|--help)
+      help
       exit 1
       ;;
     *)
@@ -22,10 +37,10 @@ while [[ $# -gt 0 ]]; do
 done
 
 if [ -f $INVENTORY_FILE ]; then
-    sudo inv-alias add $INVENTORY_FILE
-    eval "${POSITIONAL_ARGS[@]}"
-    sudo inv-alias rm $INVENTORY_FILE
+  sudo inv-alias add $INVENTORY_FILE
+  eval "${POSITIONAL_ARGS[@]}"
+  sudo inv-alias rm $INVENTORY_FILE
 else
-    echo "hosto: Could not find inventory file at $INVENTORY_FILE"
-    eval "${POSITIONAL_ARGS[@]}"
+  echo "hosto: Could not find inventory file at $INVENTORY_FILE"
+  eval "${POSITIONAL_ARGS[@]}"
 fi