simple_autoloader.rb

# Extremely simple autoloading implementation
class Module
  alias const_missing_without_autoloading const_missing
  def const_missing(const)
    path = "#{name.gsub('::', '/')}/#{const}"
    path.gsub!(/([a-z\d])([A-Z])/,'\1_\2')
    require path.downcase
    const_defined?(const) ? const_get(const) : super
  rescue LoadError => error
    warn(error.message)
    super
  end
end