Support multiple (array) input/output options in rollupOptions

[olemarius]

Is your feature request related to a problem? Please describe.
I need to output two separate .html files based on my input; The first is the default index.html file, the second is a html file containing only the script tags so that I can import that file from a legacy website. Rollup's config can be an array containing multiple inputs/outputs, which is what I need, ref https://rollupjs.org/guide/en/#configuration-files

// rollup.config.js, example from rollup docs:
export default [{
  input: 'main-a.js',
  output: {
    file: 'dist/bundle-a.js',
    format: 'cjs'
  }
}, {
  input: 'main-b.js',
  output: [
    {
      file: 'dist/bundle-b1.js',
      format: 'cjs'
    },
    {
      file: 'dist/bundle-b2.js',
      format: 'es'
    }
  ]
}];

example config

import vue from '@vitejs/plugin-vue'

import rollupConfig from './rollup.config'

// https://vitejs.dev/config/
export default defineConfig({
    build: {
        rollupOptions: rollupConfig
    },
  plugins: [vue()]
})

[yyx990803]

You can't because vite build runs a single Rollup build. If you want multiple builds, have multiple vite config files and run vite build -c different.config.js

[ldexterldesign]

👋 #3278 (comment)