From ac4d188dfad2c5688c3bfb7666c3d2467bd6de7c Mon Sep 17 00:00:00 2001
From: Christoph Niethammer <niethammer@hlrs.de>
Date: Mon, 2 May 2016 08:55:19 +0000
Subject: [PATCH] Display usage information in case of unknown action.

---
 sit | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/sit b/sit
index 0a0860b..d72a5a2 100755
--- a/sit
+++ b/sit
@@ -14,6 +14,24 @@ SIT_PATH=$(cd $(dirname $PWD/$0); pwd)
 SIT_CONFIG_FILE=$SIT_PATH/etc/sit.conf
 SIT_USER_CONFIG_FILE=$HOME/.sit
 
+function usage() {
+    echo "Usage: $0 [action] <sit package name>"
+    echo "Valid actions:"
+    echo "    sit_sitinfo"
+    echo "    unpack"
+    echo "    prepare"
+    echo "    configure"
+    echo "    build"
+    echo "    pretest"
+    echo "    install"
+    echo "    posttest"
+    echo "    postinst"
+    echo "    copy_logs"
+    echo "    setperms"
+    echo "    all"
+    exit 0
+}
+
 # sit action to be performed
 sit_action=$2
 if [[ -n $sit_action ]] ; then
@@ -263,6 +281,7 @@ case $sit_action in
 ;;
 *)
     echo "Unknown action $sit_action"
+    usage
 esac