# Common methods for PatchVersion-like models. They need a working :path
# method, which must return the patch file path
module PatchVersionLikeMethods
  def text
    @text || case path
             when nil
               raise RuntimeError, "Can't read patch text. Unsaved patch version?"
             else
               File.read(path)
             end
  end
  def size; text.size; end
end