es2049package/src/rollup.js

ECMAScript 2049 package: zero-configuration libraries and command-line utilies by Harald Rudell

/*
© 2017-present Harald Rudell <harald.rudell@gmail.com> (http://www.haraldrudell.com)
This source code is licensed under the ISC-style license found in the LICENSE file in the root directory of this source tree.
*/
import {spawn} from 'child_process'
import {promises} from 'fs'
const {lstat, readlink} = promises
import {join} from 'path'

getPackageDirectory(process.argv[1]).then(
  directory => execCommand(directory)
  ).catch(errorHandler)

async function execCommand(rollupConfigProjectDir) {
  const realRollupExecutable = join(rollupConfigProjectDir, 'node_modules', '.bin', 'rollup')
  const args = process.argv.slice(2)
  const {status, signal} = await new Promise((resolve, reject) => spawn(realRollupExecutable, args, {stdio: 'inherit'})
    .once('close', (st, si) => resolve({status: st, signal: si}))
    .on('error', reject)
  )
  if (signal) throw new Error(`signal: ${signal} status: ${status} from ${realRollupExecutable}`)
  process.exit(status)
}

async function getPackageDirectory(executable) {
  while ((await lstat(executable)).isSymbolicLink()) {
    const target = await readlink(executable)
    executable = target.startsWith('.')
      ? join(executable, '..', target)
      : target
  }
  return join(executable, '..', '..')
}

function errorHandler(e) {
  console.error(e instanceof Error ? e.message : e)
  process.exit(1)
}