Runt is a simple website development tool that helps you:
It can do that simpler than Grunt and in addition it can Monitor your filesystem for changes and do a rebuild when necessary. Further more it will analyze the dependencies in templates (like partials) and less files (imports) that should trigger a rebuild. So even if you change an included File, it will trigger a rebuild on change.
npm install -g runt
runt [--config=<config-file>] [--quiet] [--build] [--watch] [--show-config]
The default for --config is ./runt.json
Now grows support is also available. If the growl node module is available and functional it is used to also display a notification when a build item is completed.