code: def require_metadata():
      "Prevent improper installs without necessary metadata. See #659"
      egg_info_dir = os.path.join(here, 'setuptools.egg-info')
      if not os.path.exists(egg_info_dir):
          msg = (
              "Cannot build setuptools without metadata. "
              "Run `bootstrap.py`."
          )
          raise RuntimeError(msgf require_metadata():
      "Prevent improper installs without necessary metadata. See #659"
      egg_info_dir = os.path.join(here, 'setuptools.egg-info')
      if not os.path.exists(egg_info_dir):
          msg = (
              "Cannot build setuptools without metadata. "
              "Run `bootstrap.py`."
          )
          raise RuntimeError(msg)
docs: Prevent improper installs without necessary metadata. See #659