text: /**
   * Copyright 2018 Google LLC
   *
   * 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 acorn = require('acorn');
  
  function getEcmaVersion(code) {
    try {
      acorn.parse(code, {
        ecmaVersion: 5,
        sourceType: 'module',
        allowHashBang: true,
      });
      return 5;
    } catch (e) {
      return 2015;
    }
  }
  
  module.exports = getEcmaVersion;
  