Add more usage help on errors (#1)

run.sh

@@ -5,6 +5,12 @@ set -eu
 tests=(webgoat benchmark insecure-bank)
 basedir=$(dirname "$0")
 
+print_help() {
+ echo "Usage: $0 start [webgoat|benchmark|insecure-bank]"
+ echo " $0 stop"
+ echo " $0 logs"
+}
+
 print() {
  level=$1
  message=$2
@@ -88,11 +94,19 @@ fi
 
 if [ $# -lt 1 ]; then
  print "ERROR" "Choose one of the available commands: start, stop, logs"
+ echo
+ print_help
  exit 1
 fi
 
 case $1 in
  "start")
+ if [ $# -lt 2 ]; then
+ print "ERROR" "Missing sample name, chose one of: ${tests[*]}"
+ echo
+ print_help
+ exit 1
+ fi
  start "$2"
  ;;
  "stop")
@@ -101,8 +115,14 @@ case $1 in
  "logs")
  logs
  ;;
+ -h|--help)
+ print_help
+ exit 0
+ ;;
  *)
  print "ERROR" "Invalid command '$1' chose one of: start, stop, logs"
+ echo
+ print_help
  exit 1
  ;;
 esac