Cleaner way to handle special actions 'help' and 'version'

psu

@@ -30,7 +30,6 @@ main() {
 
   set_globals "$@"
 
-  if [ "$ACTION" != "help" ] && [ "$ACTION" != "version" ]; then
   # Get Portainer auth token. Will be used on every API request.
   echo_verbose "Getting auth token..."
   AUTH_TOKEN=$(http \
@@ -60,7 +59,6 @@ main() {
   STACK=$(echo "$STACKS" \
     | jq --arg PORTAINER_STACK_NAME "$PORTAINER_STACK_NAME" -jc '.[] | select(.Name == $PORTAINER_STACK_NAME)')
   echo_debug "Stack ${PORTAINER_STACK_NAME} -> $(echo $STACK | jq -C .)"
-  fi
 
   if [ $ACTION == "deploy" ]; then
     deploy
@@ -273,11 +271,9 @@ set_globals() {
 
   # Check required arguments have been provided
   check_argument "$ACTION" "action" "ACTION" "a" "action"
-  if [ "$ACTION" != "help" ] && [ "$ACTION" != "version" ]; then
   check_argument "$PORTAINER_USER" "portainer user" "PORTAINER_USER" "u" "user"
   check_argument "$PORTAINER_PASSWORD" "portainer password" "PORTAINER_PASSWORD" "p" "password"
   check_argument "$PORTAINER_URL" "portainer url" "PORTAINER_URL" "l" "url"
-  fi
   if [ "$ACTION" == "deploy" ]; then
     check_argument "$DOCKER_COMPOSE_FILE" "docker compose file" "DOCKER_COMPOSE_FILE" "c" "compose-file"
     if [ -n "$ENVIRONMENT_VARIABLES_FILE" ] && [[ ! -f "$ENVIRONMENT_VARIABLES_FILE" ]]; then
@@ -285,7 +281,7 @@ set_globals() {
       exit 1
     fi
   fi
-  if [ "$ACTION" != "list" ] && [ "$ACTION" != "help" ] && [ "$ACTION" != "version" ]; then
+  if [ "$ACTION" != "list" ]; then
     check_argument "$PORTAINER_STACK_NAME" "portainer stack name" "PORTAINER_STACK_NAME" "n" "name"
   fi
 }
@@ -436,6 +432,7 @@ inputs() {
         if [ -n "$version_message" ]; then
           ACTION="version"
           echo "$version_message"
+          exit 0
         fi
         ;;
       -h|--help|help)
@@ -490,6 +487,7 @@ inputs() {
             exit 1
           fi
         fi
+        exit 0
         ;;
       -a=*|--action=*|-a|--action)
         # DEPRECATED: To keep backwards compatibility with psu 0.1.x