title: Passing options to Haml on the command line
body: <p>I'm using Haml from the command-line to do a basic transform of one .haml file to .html, like this:</p>
  
  <pre><code>&gt; haml input.haml output.html
  </code></pre>
  
  <p>Thing is, this produces single-quotes around attributes in the resulting HTML. So how to I pass in the <code>:attr_wrapper =&gt; '"'</code> option from the command-line?</p>
  
  <p>Alternatively, can I just globally set <code>:attr_wrapper</code> to a double-quote?</p>