Do stuff

lib/markdown_html.rb

@@ -5,6 +5,10 @@ RubyPython.start python_exe: 'python2.6' if ENV['RACK_ENV'] == 'production'
 class MarkdownHTML < Redcarpet::Render::HTML
   include Redcarpet::Render::SmartyPants
 
+  def initialize(options={})
+    super options.merge(with_toc_data: true)
+  end
+
   def block_code(code, language)
     Pygments.highlight(code, lexer: language)
   end

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

lib/render_child.rb

@@ -0,0 +1,4 @@
+def render_child(name)
+  child = @item.children.find { |child| child.identifier == name }
+  child.reps.find { |rep| rep.name == :default }.content_at_snapshot(:last)
+end