gistfile1.rb

### Rails 3

$:.unshift File.join(File.dirname(__FILE__), 'rack-router/lib')
$:.unshift File.join(File.dirname(__FILE__), 'rack-mount/lib')
$:.unshift File.join(File.dirname(__FILE__), 'rails/activesupport/lib')
$:.unshift File.join(File.dirname(__FILE__), 'rails/actionpack/lib')

require 'active_support'
require 'action_view'
require 'action_view/base'
require 'action_controller'
require 'action_controller/abstract'
require 'action_controller/new_base'

module ActionController
  module Renderer
    def render(action, options = {})
      # TODO: Move this into #render_to_body
      if action.is_a?(Hash)
        options, action = action, nil 
      else
        options.merge! :action => action
      end
      
      _process_options(options)
      
      self.response_body = render_to_body(options).to_str
    end
  end
end

module ActionController
  class MyBase < AbstractBase
    use AbstractController::Callbacks
    use AbstractController::Helpers
    use AbstractController::Logger
     
    use ActionController::HideActions
    use ActionController::UrlFor
    use ActionController::Renderer # just for clarity -- not required
    use ActionController::Layouts
    
    def erect(name)
      render :text => name.new.to_s
    end
  end
end

### MyApp

$:.unshift File.join(File.dirname(__FILE__), 'app')

require 'rack/mount'
require 'rack/mount/mappers/rails_draft'

MyApp = Rack::Mount::RouteSet.new
MyApp.new_draw do |map|
  resources :posts
end

require 'models'
require 'controllers'
require 'views'

### Router

require 'rack/router'
class SimpleRack
  include Rack::Router::Routable
  
  def initialize
    prepare do |r|
      r.map "/myapp", :to => Routes
    end
  end
end

use Rack::ContentType, "text/html"
run SimpleRack.new