code: def autoupdate(config_file, store, tags_only, repos=()):
      
      migrate_config(config_file, quiet=True)
      retv = 0
      output_repos = []
      changed = False
  
      input_config = load_config(config_file)
  
      for repo_config in input_config['repos']:
          if (
              repo_config['repo'] in {LOCAL, META} or
              # Skip updating any repo_configs that aren't for the specified repo
              repos and repo_config['repo'] not in repos
          ):
              output_repos.append(repo_config)
              continue
          output.write('Updating {}...'.format(repo_config['repo']))
          try:
              new_repo_config = _update_repo(repo_config, store, tags_only)
          except RepositoryCannotBeUpdatedError as error:
              output.write_line(error.args[0])
              output_repos.append(repo_config)
              retv = 1
              continue
  
          if new_repo_config['rev'] != repo_config['rev']:
              changed = True
              output.write_line(
                  'updating {} -> {}.'.format(
                      repo_config['rev'], new_repo_config['rev'],
                  ),
              )
              output_repos.append(new_repo_config)
          else:
              output.write_line('already up to date.')
              output_repos.append(repo_config)
  
      if changed:
          output_config = input_config.copy()
          output_config['repos'] = output_repos
          _write_new_config_file(config_file, output_config)
  
      return retv
docs: Auto-update the pre-commit config to the latest versions of repos.