Non-Rails Rackup with Sprockets, Compass, and Twitter Bootstrap

application.sass

@import "compass"
@import "bootstrap"

config.ru

require 'bundler'
Bundler.setup :default, (ENV['RACK_ENV'] || 'development')

require 'sprockets'
require 'compass'
require 'sprockets-sass'
require 'bootstrap-sass'

map '/assets' do
  environment = Sprockets::Environment.new
  environment.append_path 'assets/javascripts'
  environment.append_path 'assets/stylesheets'
  run environment
end

run lambda{|env| [200, {}, ['Put your app here.']]}

Gemfile

source "https://rubygems.org"

gem 'sprockets'
gem 'sprockets-sass'
gem 'sass'
gem 'compass'
gem 'bootstrap-sass'