polymer-cli/src/run.ts

A commandline tool for Polymer projects

/**
 * @license
 * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at
 * http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at
 * http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at
 * http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at
 * http://polymer.github.io/PATENTS.txt
 */

// Be mindful of adding imports here, as this is on the hot path of all
// commands.

import * as logging from 'plylog';
import * as updateNotifier from 'update-notifier';
import {PolymerCli} from './polymer-cli';

const packageJson = require('../package.json');
const logger = logging.getLogger('cli.main');

// Update Notifier: Asynchronously check for package updates and, if needed,
// notify on the next time the CLI is run.
// See https://github.com/yeoman/update-notifier#how for info on how this works.
updateNotifier({pkg: packageJson}).notify();

(async () => {
  const args = process.argv.slice(2);
  const cli = new PolymerCli(args);
  try {
    const result = await cli.run();
    if (result && result.constructor &&
        result.constructor.name === 'CommandResult') {
      process.exit(result.exitCode);
    }
  } catch (err) {
    logger.error('cli runtime exception: ' + err);
    if (err.stack) {
      logger.error(err.stack);
    }
    process.exit(1);
  }
})();