This subsection shows example 'config.ru' files for various web frameworks.

==== Camping ====
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require 'rubygems'
require 'rack'
require 'camping'

##### Begin Camping application
Camping.goes :Blog

...your application code here...
##### End Camping application

run Rack::Adapter::Camping.new(Blog)
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For Camping versions 2.0 and up, using `run Blog` as the final line will do.

==== Halcyon ====
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require 'rubygems'
require 'halcyon'
$LOAD_PATH.unshift(Halcyon.root / 'lib')
Halcyon::Runner.load_config Halcyon.root/'config'/'config.yml'
run Halcyon::Runner.new
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==== Mack ====
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ENV["MACK_ENV"] = ENV["RACK_ENV"]
load("Rakefile")
require 'rubygems'
require 'mack'
run Mack::Utils::Server.build_app
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==== Merb ====
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require 'rubygems'
require 'merb-core'

Merb::Config.setup(
  :merb_root   => File.expand_path(File.dirname(__FILE__)),
  :environment => ENV['RACK_ENV']
)
Merb.environment = Merb::Config[:environment]
Merb.root = Merb::Config[:merb_root]
Merb::BootLoader.run

run Merb::Rack::Application.new
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==== Ramaze ====
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require "start"
Ramaze.trait[:essentials].delete Ramaze::Adapter
Ramaze.start :force => true
run Ramaze::Adapter::Base
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==== Sinatra ====
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require 'rubygems'
require 'sinatra'

root_dir = File.dirname(__FILE__)

set :environment, ENV['RACK_ENV'].to_sym
set :root,        root_dir
set :app_file,    File.join(root_dir, 'app.rb')
disable :run

run Sinatra::Application
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