Extensibility

[chadhietala]

If we are trying to have a SSOT for how to build packages, this is going to need to have extension points. We recently refactored Ember's build pipeline to move away from emberjs-build due to the abstractness and lack of extensibility. This project should provide a base class that provides something like the following:

class GlimmerBuild {
  constructor(options) {
     this.targets = options.targets;
     this.babel = options.babel.options;
  }

  typeScriptTree(tree: TypeScriptTree) {
     // perform any preprocess on typescript tree
  }

  esNextTree(tree: ESNextTree) {
   // post typescript tree / perform any pre-babel processing
  }

  esTree(tree: ESTree) {
   // post babel tree, perform any post-processing
  }

  package(tree: FinalLooseTree) {
   // do any packaging here
  }
}

class GlimmerApplicationBuild extends GlimmerBuild {}

return new GlimmerApplicationBuild().package()