rollup.js

'use strict'
const fs = require('fs')
const rollup = require('rollup').rollup
const nodeResolve = require('rollup-plugin-node-resolve')
const commonjs = require('rollup-plugin-commonjs')
const json = require('rollup-plugin-json')
const buble = require('buble')

const writeFilePromise = (path, data) =>
  new Promise((resolve, reject) =>
    fs.writeFile(path, data, err =>
      err ? reject(err) : resolve('file written')
    )
  )

rollup({
  entry: 'lib/js/repl.js',
  plugins: [
    nodeResolve({
      jsnext: true,
      main: true,
      skip: ['ramda', 'sanctuary', 'buble', 'ramda-fantasy'],
      extensions: ['.js', '.json']
    }),
    commonjs({
      include: './node_modules/**'
    }),
    json()
  ]
})
  .then(function(bundle) {
    const result = bundle.generate({
      format: 'iife',
      moduleName: 'ramtuary',
      globals: {
        ramda: 'R',
        sanctuary: 'S',
        buble: 'buble',
        'ramda-fantasy': 'RF'
      }
    })
    return buble.transform(result.code).code
  })
  .then(code => writeFilePromise('lib/js/bundle.js', code))
  .then(console.log)
  .catch(console.error)