docs: def repodata_files(self, channels=None):
          """
          Return the repodata paths based on `channels` and the `data_directory`.
  
          There is no check for validity here.
          """
          if channels is None:
              channels = self.conda_get_condarc_channels()
  
          repodata_urls = self._set_repo_urls_from_channels(channels)
  
          repopaths = []
  
          for repourl in repodata_urls:
              fullpath = os.sep.join([self._repo_url_to_path(repourl)])
              repopaths.append(fullpath)
  
          return repopaths