title: Demand a Vagrant plugin within the Vagrantfile?
body: <p>Supposed execution of a <code>Vagrantfile</code> requires a specific Vagrant plugin to be installed. So, basically what you need to do is</p>
  
  <pre><code>$ vagrant plugin install foobar-plugin
  $ vagrant up
  </code></pre>
  
  <p>If you skip the first step, <code>vagrant up</code> fails.</p>
  
  <p>Is there an option in Vagrant to make it install the plugin automatically? In other words: Is it possible to specify within a <code>Vagrantfile</code> which plugins to install automatically before creating and booting up the machine?</p>