title: How to bundle multiple files in nested directory in gulp?
body: <p>I am using gulp and what I need to do is to bundle all the files in multiple nested directories in <code>node_modlues</code> folder to <code>public/js/libName</code> and <code>dist/js/libName</code> so that I can use that module in my client.   </p>
  
  <pre><code>dist 
     js 
  node_modules 
     test_library
         file1.js
         file2.js 
         folder1
             file1.js
             file2.js
         folder2
             file3.js
             file4.js         
  public
      js 
  </code></pre>