_header.html.erb

<% if SpreeAnalytics.configured? %>
  <script type='text/javascript'>
    var jirafe= <%= raw analytics_tags.to_json %>;
    (function(){
    var d=document,g=d.createElement('script'),s=d.getElementsByTagName('script')[0];
    g.type='text/javascript',g.defer=g.async=true;g.src=d.location.protocol+'//c.jirafe.com/jirafe.js';
    s.parentNode.insertBefore(g, s);
    })();
  </script>
<% else %>
  <!-- Spree Analytics has not been initialized correctly -->
<% end %>