class Middleman::Renderers::Markdown

def after_configuration
  markdown_exts = %w(markdown mdown md mkd mkdn)
  begin
    # Look for the user's preferred engine
    if app.config[:markdown_engine] == :redcarpet
      require 'middleman-core/renderers/redcarpet'
      ::Tilt.prefer(::Middleman::Renderers::RedcarpetTemplate, *markdown_exts)
    elsif app.config[:markdown_engine] == :kramdown
      require 'middleman-core/renderers/kramdown'
      ::Tilt.prefer(::Middleman::Renderers::KramdownTemplate, *markdown_exts)
    elsif app.config[:markdown_engine]
      # Map symbols to classes
      markdown_engine_klass = if app.config[:markdown_engine].is_a? Symbol
        engine = app.config[:markdown_engine].to_s
        engine = engine == 'rdiscount' ? 'RDiscount' : engine.camelize
        app.config[:markdown_engine_prefix].const_get("#{engine}Template")
      else
        app.config[:markdown_engine_prefix]
      end
      # Tell tilt to use that engine
      ::Tilt.prefer(markdown_engine_klass, *markdown_exts)
    end
  rescue LoadError
    # If they just left it at the default engine and don't happen to have it,
    # then they're using middleman-core bare and we shouldn't bother them.
    if app.config.setting(:markdown_engine).value_set?
      logger.warn "Requested Markdown engine (#{app.config[:markdown_engine]}) not found. Maybe the gem needs to be installed and required?"
    end
  end
end