text: /**
   * Copyright (c) Facebook, Inc. and its affiliates.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   */
  
  module.exports = function preset(context, opts = {}) {
    const {siteConfig = {}} = context;
    const {themeConfig} = siteConfig;
    const {algolia, googleAnalytics, gtag} = themeConfig;
    const isProd = process.env.NODE_ENV === 'production';
  
    return {
      themes: [
        [require.resolve('@docusaurus/theme-classic'), opts.theme],
        // Don't add this if algolia config is not defined.
        algolia && require.resolve('@docusaurus/theme-search-algolia'),
      ],
      plugins: [
        [require.resolve('@docusaurus/plugin-content-docs'), opts.docs],
        [require.resolve('@docusaurus/plugin-content-blog'), opts.blog],
        [require.resolve('@docusaurus/plugin-content-pages'), opts.pages],
        isProd &&
          googleAnalytics &&
          require.resolve('@docusaurus/plugin-google-analytics'),
        isProd && gtag && require.resolve('@docusaurus/plugin-google-gtag'),
        isProd && [require.resolve('@docusaurus/plugin-sitemap'), opts.sitemap],
      ],
    };
  };
  