Code to add user email as custom variable to analytics

gistfile1.js

  var _gaq = _gaq || [];
  _gaq.push(['_setAccount', 'analytics-profile-id']);
  <% if current_user %>
  _gaq.push(['_setCustomVar', 1, 'UserEmail', '<%= current_user.email %>']);
  <% end %>
  _gaq.push(['_trackPageview']);

  (function() {
    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
  })();