Add addonPostprocessTree for type 'style'

[jschilli]

Currently addon postprocessors that wish to postprocess style files have to run on type 'all'

when running ember serve and changing only a .js file addons that postproceesTrees for 'all' will run even though no style file changes have occurred.

I will try to look into a PR for this next week.

ref: kimroen/ember-cli-autoprefixer#11

cc: // @kimroen

[rwjblue]

Definitely 👍 on this. We should have "js", "all", and "css" types for postprocessTree.

[jschilli]

@rwjblue did you mean "js", "all" and "styles" iso "css"

I'm assuming styles as that is what we call addonTrees for in other places

[rwjblue]

The preprocessors that have in the registry are "js", "template", and "css", so I believe it should match that.

[rwjblue]

Code for preprocessor helper functions is at: https://github.com/ember-cli/ember-cli/blob/master/lib/preprocessors.js

[jschilli]

gotcha, so I'll change it to 'css' but it seems odd that we call this.addonTreesFor('styles'); so from an addon author's perspective i'm dealing with 'styles' sometimes and 'css' in others

[rwjblue]

Yes, totally agreed. We should consolidated (likely on styles).

[stefanpenner]

This is causing merge collisions for me, going to try and investigate.

[stefanpenner]

I believe this is the result of a mis-behaving add-on, and isn't the fault of this change.