Rails Markdown (Kramdown) Template Handler

markdown_handler.rb

# config/initializers/markdown_handler.rb

module MarkdownHandler
  def self.erb
    @erb ||= ActionView::Template.registered_template_handler(:erb)
  end

  def self.call(template)
    compiled_source = erb.call(template)
    "Kramdown::Document.new(begin;#{compiled_source};end, auto_ids: false).to_html"
  end
end

ActionView::Template.register_template_handler :md, MarkdownHandler
ActionView::Template.register_template_handler :markdown, MarkdownHandler