gistfile1.rb

<tomcat-users>
<% @roles.each do |role| -%>
<role rolename="<%= role %>" />
<% end -%>
<% @users.each do |user| -%>
<user username="<%= user['id'] %>" password="<%= user['password'] %>" roles="<%= user['roles'].join(', ') %>" />
<% end -%>
</tomcat-users>