Register FML in Middleman

config.rb

# Register the FML plugin to middleman
module Middleman::Renderers::FAQML
  def registered(app)
    begin
      require "faqml"
      app.before_configuration { template_extensions :fml => :html }
      ::FAQML::Engine.set_default_options(
        :buffer    => '@_out_buf',
        :generator => ::Temple::Generators::StringBuffer
      )
    rescue LoadError
    end
  end
end
Middleman::Application.register Middleman::Renderers::FAQML