title: Creating a custom Vagrantfile from Packer
body: <p>I've been trying to figure out how to create a custom vagrant file from packer, I understand that in the <code>post-processor</code> section you will define a directory from which to scrap from, what I do not understand is if there needs to be a specifically named file inside as to which to gather data from.</p>
  
  <pre><code>"post-processors": [{
    "vagrantfile_template": "configs/vagrantfile_template",
    "type": "vagrant"
  }],
  </code></pre>
  
  <p>The above code to my knowledge would look under <code>configs/vagrantfile_template</code>, but what would need to be in here? Would I create a <code>Vagrantfile</code> and place it there, or would it need to be a specifically named Ruby file?</p>