code: def ProcessPathSpec(self, mediator, path_spec):
      
      self.last_activity_timestamp = time.time()
      self.processing_status = definitions.STATUS_INDICATOR_RUNNING
  
      file_entry = path_spec_resolver.Resolver.OpenFileEntry(
          path_spec, resolver_context=mediator.resolver_context)
  
      if file_entry is None:
        display_name = mediator.GetDisplayNameForPathSpec(path_spec)
        logger.warning(
            'Unable to open file entry with path spec: {0:s}'.format(
                display_name))
        self.processing_status = definitions.STATUS_INDICATOR_IDLE
        return
  
      mediator.SetFileEntry(file_entry)
  
      try:
        if file_entry.IsDirectory():
          self._ProcessDirectory(mediator, file_entry)
        self._ProcessFileEntry(mediator, file_entry)
  
      finally:
        mediator.ResetFileEntry()
  
        self.last_activity_timestamp = time.time()
        self.processing_status = definitions.STATUS_INDICATOR_IDLE
docs: Processes a path specification.
  
      Args:
        mediator (ParserMediator): mediates the interactions between
            parsers and other components, such as storage and abort signals.
        path_spec (dfvfs.PathSpec): path specification.