_analytics.html.erb

<% if @current_site.google_analytics_web_property_id %>
  <script type="text/javascript">
    var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
    document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
  </script>
  <script type="text/javascript">
    try {
      var pageTracker = _gat._getTracker("<%= @current_site.google_analytics_web_property_id %>");
      pageTracker._trackPageview();
    } catch(err) {}
  </script>
<% end %>

_analytics.html.haml

- if @current_site.google_analytics_web_property_id
  :javascript
    var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
    document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
  :javascript
    try {
      var pageTracker = _gat._getTracker("#{@current_site.google_analytics_web_property_id}");
      pageTracker._trackPageview();
    } catch(err) {}