enums are undefined on namespace merging

Type of Issue

[x] Bug Report
[ ] Feature Request

Description

A bug: please describe the error that you encountered Typescript declartion merging leaves, enums undefined.

export interface Test {

}

export namespace Test {
  export enum TestEnum {
    Hello='Hello',
    World='World'
  }
}

Test.TestEnum === undefined.
Test.TestEnum.Hello <-- throws error because undefined.

How To Reproduce

A bug: please include instructions how to reproduce. Issues without reproduction are likely to receive no feedback.

1. Create some files with the above setup.
2. Attempt to import the Test interface and use the TestEnum somewhere. It will throw an error because the TestEnum is undefined

Can you reproduce the error in the integration tests in ng-packagr? If possible, take a look at the integration/samples and try to break one of these builds!

Is the error you faced in an application importing the library Try to break the Angular CLI app in integration/consumers/ng-cli!

Expected Behaviour

A bug: please describe what behaviour or result you expected No Error

Version Information

$ node_modules/.bin/ng-packagr --version
ng-packagr: 2.4.2
@angular/*: 5.2.4
typescript: 2.7.1
rxjs: 5.5.10
node: 9.8.1
npm/yarn: yarn 1.5.1

[kevupton]

Hey @alan-agius4, tsickle has released version 0.29.0 which apparently fixes this problem. 🥂 🎊

[alan-agius4]

Did you use annotateForClosureCompiler in your own project before? As without this flag tsickle won’t be used.