config.ru

require 'rack'
require ::File.expand_path('../myapp',  __FILE__)


run MyApp

myapp.rb

require 'guillotine'
require 'riak/client'
module MyApp
  class App < Guillotine::App
    client = Riak::Client.new :protocol => 'http', :port => 8091
    bucket = client['guillotine']
    set :db => Guillotine::Adapters::RiakAdapter.new(bucket)

    get '/' do
      redirect 'http://github.com'
    end
  end
end

result

dev git:master ❯ rackup
[2011-11-10 13:45:27] INFO  WEBrick 1.3.1
[2011-11-10 13:45:27] INFO  ruby 1.9.2 (2011-07-09) [x86_64-darwin11.2.0]
[2011-11-10 13:45:27] INFO  WEBrick::HTTPServer#start: pid=34385 port=9292
NoMethodError: undefined method `call' for MyApp:Module
	/Users/clint/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/lint.rb:48:in `_call'
	/Users/clint/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/lint.rb:36:in `call'
	/Users/clint/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/showexceptions.rb:24:in `call'
	/Users/clint/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/commonlogger.rb:20:in `call'
	/Users/clint/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/chunked.rb:41:in `call'
	/Users/clint/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/content_length.rb:14:in `call'
	/Users/clint/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/rack-1.3.5/lib/rack/handler/webrick.rb:59:in `service'
	/Users/clint/.rbenv/versions/1.9.2-p290/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
	/Users/clint/.rbenv/versions/1.9.2-p290/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
	/Users/clint/.rbenv/versions/1.9.2-p290/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'
127.0.0.1 - - [10/Nov/2011 13:45:31] "GET / HTTP/1.1" 500 38178 0.0418