es2049package/bin/rollup.js

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

#!/usr/bin/env node
import { spawn } from 'child_process';
import { promises } from 'fs';
import { join } from 'path';

/*
© 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.
*/
const {
  lstat,
  readlink
} = promises;
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);
}