Do stuff

lib/nav.rb

@@ -0,0 +1,14 @@
+include Nanoc::Helpers::LinkTo
+
+def nav_link_with_active(text, target, attributes = {})
+  path = target.is_a?(String) ? target : target.path
+  rep_path = @item_rep.path
+
+  active = if path == '/'
+             path == rep_path
+           else
+             /^#{path}/ =~ rep_path
+           end
+
+  "<li #{'class="active"' if active}>" + link_to(text, target, attributes) + "</li>"
+end