next.js/bin/next-build

#!/usr/bin/env node

import { resolve, dirname } from 'path'
import parseArgs from 'minimist'
import fs from 'mz/fs'
import mkdirp from 'mkdirp-then';
import glob from 'glob-promise'
import { transpile, bundle } from '../server/build'

const argv = parseArgs(process.argv.slice(2), {
  alias: {
    h: 'help',
  },
  boolean: ['h']
})

const dir = resolve(argv._[0] || '.')

Promise.resolve()
.then(async () => {
  const paths = await glob('**/*.js', { cwd: dir, ignore: 'node_modules/**' })
  await Promise.all(paths.map(async (p) => {
    const code = await transpile(resolve(dir, p))
    const outpath = resolve(dir, '.next', p)
    await writeFile(outpath, code)
  }))

  const pagePaths = await glob('.next/pages/**/*.js', { cwd: dir })
  await Promise.all(pagePaths.map(async (p) => {
    const code = await bundle(resolve(dir, p))
    const outpath = resolve(dir, '.next', p)
    await writeFile(outpath, code)
  }))
})
.catch((err) => {
  console.error(err)
  exit(1)
})

async function writeFile (path, data) {
  await mkdirp(dirname(path))
  await fs.writeFile(path, data, { encoding: 'utf8', flag: 'w+' })
}