text: /*
   * Copyright 2019 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
   *
   *     https://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 fs = require('fs');
  const localeCode = require('iso-639-1');
  const path = require('path');
  
  const defaultLocale = 'en';
  const isProd = Boolean(process.env.GAE_APPLICATION);
  const contentDir = isProd ? '../dist' : '../src/site/content';
  const dirs = fs.readdirSync(path.join(__dirname, contentDir));
  // @ts-ignore
  const supportedLocales = dirs.filter((dir) => localeCode.validate(dir));
  
  const isSupportedLocale = (locale) => supportedLocales.indexOf(locale) > -1;
  
  module.exports = {
    defaultLocale,
    supportedLocales,
    isSupportedLocale,
  };
  