def recursive_generate_copy_in(copy_in, current_path)
      limited_files_of(current_path) { |file| copy_in << file }
      directories_of(current_path) do |dir|
        recursive_generate_copy_in(copy_in, ::File.join(dir))
      end
      true
    end
def recursive_generate_copy_in(copy_in, current_path)
      limited_files_of(current_path) { |file| copy_in << file }
      directories_of(current_path) do |dir|
        recursive_generate_copy_in(copy_in, ::File.join(dir))
      end
      true
    end
recursive part of generate_copy_in