errors.js

/**
 * Copyright 2017 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


const chalk = require('chalk');


const log = (msg) => process.stderr.write(msg);


module.exports = (err) => {
  if (err instanceof Error) {
    log(`\n${err.stack}\n`);
  } else {
    log('\n');
    for (let {source, line, column, desc, type} of err.errors) {
      const color = chalk[type == 'error' ? 'red' : 'yellow'];

      log(`${color(`[${type}]`)} ${desc}\n`);
      log(chalk.gray(`${source} [${line}:${column}]\n\n`));
    }
  }
};