unbundle/src/index.js

`require()` and `import`/`export` in the browser, without the bundling

import debug from 'debug'
import streamToPromise from 'stream-to-promise'
import {resolve, relative} from 'path'
import mdeps from 'module-deps'

import {findOutputPath} from './findOutputPath'
import {processFile} from './processFile'

export default async (entry, destination) => {
  const log = debug('unbundle')
  entry = resolve(process.cwd(), entry)
  destination = resolve(process.cwd(), destination)

  log(`Entry: ${entry}`)
  log(`Destination: ${destination}`)

  const processors = []
  const dependencies = mdeps({
    ignoreMissing: true,
    transform: [
      ['babelify', { /* babelrc options */ }]
    ]
  })
  dependencies.on('file', (file) => {
    processors.push((async () => {
      const output = findOutputPath(file, entry, destination)
      log(relative(process.cwd(), output))
      await processFile(file, output, destination)
    })())
  })
  dependencies.on('missing', (id, parent) => log(`Missing: ${id}`))
  dependencies.end({file: entry})
  await streamToPromise(dependencies)
  return await Promise.all(processors)
}