I'm currently building a pretty big application over at @zeit: While bundling the react application, I'm also bundling/transpiling the electron part.

To accomplish this, I've created a rollup.config.electron.js and a rollup.config.react.js who're both doing different things (but pretty similar). At the same time, I'm using concurrently to run the CLI with -w for both configs at the same time. In my opinion, that's all pretty hacky.

So my wish would be that I could simply combine both configs in one rollup.config.js:

export default [
  {
    entry: 'src/foo.js',
    dest: 'dist/foo.js'
  }, {
    entry: 'src/bar.js',
    dest: 'dist/bar.js'
  }
]

This has already been suggested in #703 and several approaches have been mentioned. However, not a single of them is a long-term solution, if you ask me. This could be much easier!

Because of this reason, @bahmutov created rollem. However, the package isn't as fast as rollup itself would be because it's implementing the whole --watch functionality on its own. In addition, it does not support ES2015 module syntax.

IMHO, we should just build this into the core.