[Feature Request] Integration with `rollup-plugin-alias`

[JounQin]

Type of Issue

• Bug Report
• Feature Request

Description

A bug: please describe the error that you encountered

A feature: please describe your use case and motivation

Support rollup-plugin-alias for aliasing from loash-es -> lodash.

How To Reproduce

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

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

A feature: do you have a first draft or an idea how to implement?

{
  "alias": {
    "lodash": "lodash-es"
  }
}

Something like parcel resolution which reads it from package.json.

Version Information

$ node_modules/.bin/ng-packagr --version
ng-packagr: 5.5.0
@angular/*: 8.2.3
typescript: 3.5.3
rxjs: 6.5.2
node: v12.8.1
yarn: 1.17.3

Please include all version numbers that might be relevant, e.g. third-party libraries

[alan-agius4]

Hi, thanks for the interest, however rollup is only used to generate FESM and UMD bundles and it will not process ESM bundles.

Hence, we cannot add any transformers/plugins in the pipeline unless they are a must to either generate FESMs or UMD bundles.