text: #!/usr/bin/env node
  
  'use strict';
  
  /*!
   * Script to generate SRI hashes for use in our docs.
   * Remember to use the same vendor files as the CDN ones,
   * otherwise the hashes won't match!
   *
   * Copyright 2017-2019 The Bootstrap Authors
   * Copyright 2017-2019 Twitter, Inc.
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/v3-dev/LICENSE)
   */
  
  var crypto = require('crypto');
  var fs = require('fs');
  var path = require('path');
  var replace = require('replace-in-file');
  
  var configFile = path.join(__dirname, '../_config.yml');
  
  // Array of objects which holds the files to generate SRI hashes for.
  // `file` is the path from the root folder
  // `configPropertyName` is the _config.yml variable's name of the file
  var files = [
    {
      file: 'dist/css/bootstrap.min.css',
      configPropertyName: 'css_hash'
    },
    {
      file: 'dist/css/bootstrap-theme.min.css',
      configPropertyName: 'css_theme_hash'
    },
    {
      file: 'dist/js/bootstrap.min.js',
      configPropertyName: 'js_hash'
    }
  ];
  
  files.forEach(function (file) {
    fs.readFile(file.file, 'utf8', function (err, data) {
      if (err) {
        throw err;
      }
  
      var algo = 'sha384';
      var hash = crypto.createHash(algo).update(data, 'utf8').digest('base64');
      var integrity = algo + '-' + hash;
  
      console.log(file.configPropertyName + ': ' + integrity);
  
      try {
        replace.sync({
          files: configFile,
          from: new RegExp('(\\s' + file.configPropertyName + ':\\s+"|\')(\\S+)("|\')'),
          to: '$1' + integrity + '$3'
        });
      } catch (error) {
        console.error('Error occurred:', error);
      }
    });
  });
  