Simple markdown include renderer for Jekyll.

markdown.rb

module Jekyll
  class MarkdownTag < Liquid::Tag
    def initialize(tag_name, text, tokens)
      super
      @text = text.strip
    end

    def html_renderer(config)
      @html_renderer ||= Jekyll::Converters::Markdown.new(config)
    end

    def render(context)
      tmpl = File.read File.join Dir.pwd, "_includes", @text
      site = context.registers[:site]
      tmpl = (Liquid::Template.parse tmpl).render site.site_payload
      html_renderer(site.config).convert(tmpl)
    end
  end
end

Liquid::Template.register_tag('markdown', Jekyll::MarkdownTag)


# {% markdown foo.md %}
# renders _includes/foo.md