title: How do I tell fabric which role current site has?
body: <p>I have just one command in fabfile.py:</p>
  
  <pre><code>@role('dev')
  def test():
      local('...')
  </code></pre>
  
  <p>Now, I can use <code>--role=dev</code> in every command, but this is extremely stupid.</p>
  
  <p>What I want is to install my project in a host once, with a certain role, then use it without repeating this parameter.</p>