NodeJS recursive directory listing without a module package

nodejs-recursive-directory.js

/**
 * Goes through the given directory to return all files and folders recursively
 * @author Ash Blue ash@blueashes.com
 * @example getFilesRecursive('./folder/sub-folder');
 * @requires Must include the file system module native to NodeJS, ex. var fs = require('fs');
 * @param {string} folder Folder location to search through
 * @returns {object} Nested tree of the found files
 */
// var fs = require('fs');
function getFilesRecursive (folder) {
    var fileContents = fs.readdirSync(folder),
        fileTree = [],
        stats;

    fileContents.forEach(function (fileName) {
        stats = fs.lstatSync(folder + '/' + fileName);

        if (stats.isDirectory()) {
            fileTree.push({
                name: fileName,
                children: getFilesRecursive(folder + '/' + fileName)
            });
        } else {
            fileTree.push({
                name: fileName
            });
        }
    });

    return fileTree;
};