# File lib/xdg/base_dir.rb, line 99
    def list
      environment_variables.map do |v|
        if paths = ENV[v]
          dirs = paths.split(/[:;]/)
        else
          dirs = DEFAULTS[v]
        end
        if subdirectory
          dirs.map{ |path| File.join(path, subdirectory) }
        else
          dirs
        end
      end.flatten
    end