MKD_SAFE_RENDERER = Redcarpet::Markdown.new( Redcarpet::Render::HTML.new(:filter_html => true, :hard_wrap => true), :no_intra_emphasis => true, :autolink => true ) MKD_RENDERER = Redcarpet::Markdown.new( Redcarpet::Render::HTML.new, :no_intra_emphasis => true, :autolink => true ) module MarkdownHandler def self.erb @erb ||= ActionView::Template.registered_template_handler(:erb) end def self.call(template) compiled_source = erb.call(template) "MKD_RENDERER.render(begin;#{compiled_source};end).html_safe" end end ActionView::Template.register_template_handler :md, MarkdownHandler