Documentation Is:

• Missing
• Needed
• Confusing
• Not Sure?

Please Explain in Detail...

I'm not entirely sure if what I'm asking about is possible, this might be a feature request. Per the title, I have a few entry points, and each of those needs to output multiple formats, and chunks should be shared between them.

So something like:

rollup({
  input: ['src/ponyfill.js', 'src/polyfill.js'],
  output: [{
    dir: 'dist/esm/'
    format: 'esm'
  }, {
    dir: 'dist/cjs/'
    format: 'cjs'
  }]
}) 

Where src/polyfill.js imports src/ponyfill.js.

And, ideally would like to be able to have per-output plugins too, e.g. for minified vs. non-minified bundle.

This is related to #3325, as:

1. Can't do multiple configs via the API
2. bundle.write only takes one OutputOptions, not an array of OutputOptions, so I think this isn't possible via the API

Based on 2. I think I'd currently have to run rollup and bundle.write once on each format right now, which is pretty time-consuming as none of the work is re-used between formats.

This is something I'm running into in with supporting multiple entries in TSDX: jaredpalmer/tsdx#367 . Currently rollup is ran on each format and on each input, which is very time-consuming and, more problematically, no code is shared between the two bundles.

Also seems related to the quite older #1150

Your Proposal for Changes

Clarify if this is possible (with the API and CLI). If not, what are the current workarounds? Running rollup for each format with multiple inputs?