gistfile1.rb

  # Render a template file using Tilt. Templates can
  # have multiple file extensions, which will be rendered one at a
  # time. For example, "foo.md.erb" will first be run through ERB,
  # then through Markdown.

  def self.render template, context = nil, options = {}
    context ||= Object.new
    options.merge! default_encoding: Encoding::UTF_8

    file = Dir["app/templates/#{template}.*"].first

    unless file and File.file? file
      raise "Can't find [#{template}] template."
    end

    input = File.read file
    steps = file.split(".").reverse

    output = steps.inject(input) do |input, step|
      renderer = Tilt[step]
      renderer ? renderer.new(file) { input }.render(context, options) : input
    end
  end