add log file handler

from enum import Enum

import importlib

from typing import Any, Optional

from pathlib import Path

import logging

class WorkflowEngineExitCodes(Enum):

    def run(self) -> None:

        r"""Sequential execution of the tasks specified in the JSON configuration file."""

        # set the logger file if it is specified in the configuration

        log_file_name = self.config.get("log_file_name", "")

        if log_file_name:

            # create log file to capture the root logger, in order to also capture messages from the backend

            log_file_path = Path(log_file_name)

            log_file_handler = logging.FileHandler(log_file_path)

            log_file_handler.setLevel(logging.INFO)

            # set formatter

            formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")

            log_file_handler.setFormatter(formatter)

            # add handler to root logger

            root_logger = logging.getLogger()

            root_logger.addHandler(log_file_handler)

        # verify the inputs are sensible

        self._dryrun()

        # initialize the registry of global parameters with the metadata

        self._registry = {k: v for k, v in self.config.items() if k not in ("name", "tasks")}