snippet.rb

module Namespace

  # Load file into module/class namespace.

  def module_load(path)
    if path =~ /^[\/~.]/
      file = File.expand_path(path)
    else
      $LOAD_PATH.each do |lp|
        file = File.join(lp,path)
        break if File.exist?(file)
        file = nil
      end
    end

    module_eval(File.read(file))
  end

  # Require file into module/class namespace.

  def module_require(path)
    if path =~ /^[\/~.]/
      file = File.expand_path(path)
    else
      $LOAD_PATH.each do |lp|
        file = File.join(lp,path)
        break if File.exist?(file)
        file += '.rb'
        break if File.exist?(file)
        file = nil
      end
    end

    @loaded ||= {}
    if @loaded.key?(file)
      false
    else
      @loaded[file] = true
      module_eval(File.read(file))
      true
    end
  end

  def require(path)
    self.module_require(path)
  end
  
  def load(path)
    self.module_load(path)
  end

end

module Root
end

module C 
  extend Namespace
  module_require 'm'
end

### Contents of m.rb
# 
# class A
# end
# 
# module M
#   class B
#   end
# end
# 
# require 'c'
#

### Contents of c.rb
#
# class CCC
# end
# 
# class ::DDD
# end
# 
# class Root::EEE
# end
#

C::A # => C::A

C::M::B # => C::M::B

C::CCC # => C::CCC

DDD # => DDD

Root::EEE # => Root::EEE

CCC # => 
# ~> -:97: uninitialized constant CCC (NameError)