Update README for ember-cli-babel@6

High Level items:

• We use babel-preset-env to control transpilation.
• The project.targets property (which comes from config/targets.js`) is used to pass babel-preset-env’s list of targets.
• All options added in options.babel are passed on to babel-preset-env

New public API’s:

• transpileTree (from https://github.com/babel/ember-cli-babel/pull/126)
• isPluginRequired (from https://github.com/babel/ember-cli-babel/commit/16ed3369658c296444fc6df6d5a9e8e8a560f111 and https://github.com/babel/ember-cli-babel/pull/117)
• We allow options.babel6 for backwards compat with older ember-cli versions (which were sharing the projects babel config from ember-cli-build.js between both the app/addon itself and ember-cli’s internal transpilation)

Plugin ordering:

1. plugins in options.babel.plugins
2. modules plugin if options['ember-cli-babel'].compileModules is true
3. plugins from `babel-preset-env
4. plugins in options.babel.postTransformPlugins

[rwjblue]

https://github.com/babel/ember-cli-babel/pull/154 did a significant pass to refactor the README. I believe the snippets have been simplified (and are now valid), and all of the options we support are documented.

Closing…

[buschtoens]

When you turn on the custom treeForAddon hook, the final vendor.js looks a bit different, resulting in this error:

Error: Could not find module `foo-addon/components/foo-component/component` imported from `in-repo-addon-demo/components/foo-component`
    at missingModule (loader.js:232)
    at findModule (loader.js:243)
    at Module.findDeps (loader.js:173)
    at findModule (loader.js:247)
    at requireModule (loader.js:26)
    at Class._extractDefaultExport (index.js:392)
    at Class.resolveOther (index.js:108)
    at Class.superWrapper [as resolveOther] (ember.debug.js:42849)
    at Class.resolve (ember.debug.js:7201)
    at resolve (ember.debug.js:4590)

Here’s a diff: https://gist.github.com/buschtoens/20a8a96b9c5ac07b73db0ef96abf08e3/revisions