Provide a way to skip import of add-on assets

[ember-cli]

Provide a way to skip import of add-on assets

[kellyselden]

https://github.com/kellyselden/ember-cli-funnel was created to solve this problem, although it would need to be extended to support css as well as javascript.

[felixbuenemann]

@kellyselden It might be possible to solve this using an addon by implementing the preprocessTree hook, which runs before preprocessors. ember-cli-funnel currently wraps the EmberApp#appAndDependencies method, which runs after template and js preprocessing…

[felixbuenemann]

OK, preprocessTree doesn't currently work for excluding files, it will crash with ENOENT for the excluded files during SimpleConcat: Concat: Vendor Styles/assets/vendor.css.

[nathanhammond]

So, this is actually a known issue and we want to extract the default Ember CLI CSS handling into an addon itself and then add it back in via whatever (possibly new) public APIs that it needs.

There are likely a few more hooks that we need and we'll identify those as part of this process. Check out our core team meeting notes from the last two weeks:

• emberjs/core-notes#108
• emberjs/core-notes#109

[rwjblue]

We are working on closing the ember-cli/rfcs repo in favor of using a single central RFC's repo for everything. This was laid out in https://emberjs.github.io/rfcs/0300-rfc-process-update.html.

Sorry for the troubles, but would you mind reviewing to see if this is still something we need, and if so migrating this over to emberjs/rfcs?