import rollup from './other-file'
rollup()

export default function rollup() {
  console.log('hi')
}

var rollup = require('jstransformer')(require('jstransformer-rollup'));
 
rollup.renderFileAsync('index.js', {
  // options here passed to rollup.rollup and bundle.generate
  // https://github.com/rollup/rollup/wiki/JavaScript-API
}).body
//=> 'function rollup() {\n  console.log('hi')\n}\nrollup()'