During development, I have found quite useful to import the EmberJS project as git submodule instead of importing the emberjs build file.
This project setup allows easier debugging and provides a context to gain a better understanding of EmberJS internals.
Before, I setup the rake pipeline library and now I wanted to check it broccoli. So far, I did not find out any clear example, I have shared a demo example to whom it may be interested.
Based on ember-cli and ember-dev, the broccoli and rake pipeline configuration with the collection of plugins and filters could be useful to anyone interested on running any similar build process.