How to use the certbot.errors.ReverterError function in certbot

cp_dir,
                            os.path.basename(path) + "_" + str(idx)), path)
            except (IOError, OSError):
                # This file is required in all checkpoints.
                logger.error("Unable to recover files from %s", cp_dir)
                raise errors.ReverterError(
                    "Unable to recover files from %s" % cp_dir)

        # Remove any newly added files if they exist
        self._remove_contained_files(os.path.join(cp_dir, "NEW_FILES"))

        try:
            shutil.rmtree(cp_dir)
        except OSError:
            logger.error("Unable to remove directory: %s", cp_dir)
            raise errors.ReverterError(
                "Unable to remove directory: %s" % cp_dir)

with open(file_list, "r") as list_fd:
                filepaths = list_fd.read().splitlines()
                for path in filepaths:
                    # Files are registered before they are added... so
                    # check to see if file exists first
                    if os.path.lexists(path):
                        os.remove(path)
                    else:
                        logger.warning(
                            "File: %s - Could not be found to be deleted\n"
                            " - Certbot probably shut down unexpectedly",
                            path)
        except (IOError, OSError):
            logger.critical(
                "Unable to remove filepaths contained within %s", file_list)
            raise errors.ReverterError(
                "Unable to remove filepaths contained within "
                "{0}".format(file_list))

        return True

"""Reload users original configuration files after a temporary save.

        This function should reinstall the users original configuration files
        for all saves with temporary=True

        :raises .ReverterError: when unable to revert config

        """
        if os.path.isdir(self.config.temp_checkpoint_dir):
            try:
                self._recover_checkpoint(self.config.temp_checkpoint_dir)
            except errors.ReverterError:
                # We have a partial or incomplete recovery
                logger.fatal("Incomplete or failed recovery for %s",
                             self.config.temp_checkpoint_dir)
                raise errors.ReverterError("Unable to revert temporary config")

file will be cleaned up if the program exits unexpectedly.
        (Before a save occurs)

        :param bool temporary: If the file creation registry is for
            a temp or permanent save.
        :param \*files: file paths (str) to be registered

        :raises certbot.errors.ReverterError: If
            call does not contain necessary parameters or if the file creation
            is unable to be registered.

        """
        # Make sure some files are provided... as this is an error
        # Made this mistake in my initial implementation of apache.dvsni.py
        if not files:
            raise errors.ReverterError("Forgot to provide files to registration call")

        cp_dir = self._get_cp_dir(temporary)

        # Append all new files (that aren't already registered)
        new_fd = None
        try:
            new_fd, ex_files = self._read_and_append(os.path.join(cp_dir, "NEW_FILES"))

            for path in files:
                if path not in ex_files:
                    new_fd.write("{0}\n".format(path))
        except (IOError, OSError):
            logger.error("Unable to register file creation(s) - %s", files)
            raise errors.ReverterError(
                "Unable to register file creation(s) - {0}".format(files))
        finally:

command_file = None
        # It is strongly advised to set newline = '' on Python 3 with CSV,
        # and it fixes problems on Windows.
        kwargs = {'newline': ''} if sys.version_info[0] > 2 else {}
        try:
            if os.path.isfile(commands_fp):
                command_file = open(commands_fp, "a", **kwargs)  # type: ignore
            else:
                command_file = open(commands_fp, "w", **kwargs)  # type: ignore

            csvwriter = csv.writer(command_file)
            csvwriter.writerow(command)

        except (IOError, OSError):
            logger.error("Unable to register undo command")
            raise errors.ReverterError(
                "Unable to register undo command.")
        finally:
            if command_file is not None:
                command_file.close()

def rollback_checkpoints(self, rollback=1):
        """Revert 'rollback' number of configuration checkpoints.

        :param int rollback: Number of checkpoints to reverse. A str num will be
           cast to an integer. So "2" is also acceptable.

        :raises .ReverterError:
            if there is a problem with the input or if the function is
            unable to correctly revert the configuration checkpoints

        """
        try:
            rollback = int(rollback)
        except ValueError:
            logger.error("Rollback argument must be a positive integer")
            raise errors.ReverterError("Invalid Input")
        # Sanity check input
        if rollback < 0:
            logger.error("Rollback argument must be a positive integer")
            raise errors.ReverterError("Invalid Input")

        backups = os.listdir(self.config.backup_dir)
        backups.sort()

        if not backups:
            logger.warning(
                "Certbot hasn't modified your configuration, so rollback "
                "isn't available.")
        elif len(backups) < rollback:
            logger.warning("Unable to rollback %d checkpoints, only %d exist",
                           rollback, len(backups))

with open(changes_since_path, 'w') as f:
                f.write("No changes\n")

        # Add title to self.config.in_progress_dir CHANGES_SINCE
        try:
            with open(changes_since_tmp_path, "w") as changes_tmp:
                changes_tmp.write("-- %s --\n" % title)
                with open(changes_since_path, "r") as changes_orig:
                    changes_tmp.write(changes_orig.read())

        # Move self.config.in_progress_dir to Backups directory
            shutil.move(changes_since_tmp_path, changes_since_path)
        except (IOError, OSError):
            logger.error("Unable to finalize checkpoint - adding title")
            logger.debug("Exception was:\n%s", traceback.format_exc())
            raise errors.ReverterError("Unable to add title")

        # rename the directory as a timestamp
        self._timestamp_progress_dir()

This function should reinstall the users original configuration files
        for all saves with temporary=True

        :raises .ReverterError: when unable to revert config

        """
        if os.path.isdir(self.config.temp_checkpoint_dir):
            try:
                self._recover_checkpoint(self.config.temp_checkpoint_dir)
            except errors.ReverterError:
                # We have a partial or incomplete recovery
                logger.critical(
                    "Incomplete or failed recovery for %s",
                    self.config.temp_checkpoint_dir,
                )
                raise errors.ReverterError("Unable to revert temporary config")

self.reverter.add_to_temp_checkpoint(
                        save_files, self.save_notes)
                else:
                    self.reverter.add_to_checkpoint(save_files,
                                                    self.save_notes)
            except errors.ReverterError as err:
                raise errors.PluginError(str(err))

        self.aug.set("/augeas/save", save_state)
        self.save_notes = ""
        self.aug.save()

        if title and not temporary:
            try:
                self.reverter.finalize_checkpoint(title)
            except errors.ReverterError as err:
                raise errors.PluginError(str(err))