Fix #168: handle empty command gracefully

diff --git a/launcher b/launcher
index 65371e300c7bd03fdc2298a4491cddf7191fc41b..b4b0d370684566a071cb779b9dd478c2f188f221 100755 (executable)
--- a/launcher
+++ b/launcher
@@ -310,7 +310,7 @@ RUBY
   install_docker
 }
 
-[ $command == "cleanup" ] && {
+[ "$command" == "cleanup" ] && {
   echo
   echo "The following command will"
   echo "- Delete all docker images for old containers"