OptimizeChunks not applying on first generate

[guybedford]

• Rollup Version:
• Operating System (or Browser):
• Node Version:

How Do We Reproduce?

Reproduction case: https://github.com/keithamus/rollup-repro/tree/expanded

Expected Behavior

Using optimizeChunks should result in the new chunk names being rendered during generation.

Actual Behavior

The previous chunk names are rendered into dependencies, and only after running generate again are the correct chunk names used.

[guybedford]

To clarify - the CLI output is giving chunk references like chunk__3 where that chunk was already merged into chunk__1 by the optimizing phase.

[guybedford]

The workaround for this is to run a build like:

const rollup = require('../rollup');

rollup.rollup({
  experimentalCodeSplitting: true,
  optimizeChunks: true,
  input: ['main1.js', 'main2.js', 'main3.js']
}).then(build => {
  return build.generate({ format: 'amd' })
  .then(generated => {
    return build.generate({ format: 'amd' });
  });
}).then(generated => {
  console.log(generated);
})
.catch(e => {
  console.log(e);
})