settings.py

# -*- coding: utf-8 -*-
import logging
import os
from pathlib import Path

import tornado
from tornado.options import define, options

from lib import logconfig
import environment

# Make filepaths relative to settings.
path = lambda root, *a: os.path.join(root, *a)
ROOT = os.path.dirname(os.path.abspath(__file__))

define('host',
       help='host of the server',
       type=str)
define('port',
       default=6060,
       help='port of the server',
       type=int)

define('debug',
       default=True,
       help='debug mode for development',
       type=bool)
define('deploy',
       default='DEV',
       help='DEVelopment or PRODuction mode',
       type=str)

define('device_id',
       help='Device ID of RPi for authentication',
       type=str)
define('auth_key',
       help='Key phrase for authentication',
       type=str)

define('config',
       help='program configuration',
       type=str)

define('tmp_dir',
       default='/tmp/exotic-rpi',
       help='location for temporary files',
       type=str)

define('platform',
       help='FPGA platform connected to this rpi',
       type=str)

define('cmd_read',
       default='lib/fpga_reader.py',
       help='command to start FPGA serial reader program',
       type=str)

tornado.options.parse_command_line()

if options.config:
    tornado.options.parse_config_file(options.config)

SYSLOG_TAG = "exotic_rpi"
SYSLOG_FACILITY = logging.handlers.SysLogHandler.LOG_LOCAL2
LOG_LEVEL = logging.DEBUG if options.debug else logging.INFO
USE_SYSLOG = options.deploy == 'PROD'
# See PEP 391 and logconfig for formatting help.  Each section of LOGGERS
# will get merged into the corresponding section of log_settings.py.
# Handlers and log levels are set up automatically based on LOG_LEVEL and DEBUG
# unless you set them here.  Messages will not propagate through a logger
# unless propagate: True is set.
LOGGERS = {
    'loggers': {
        'tornado.application': {},  #
        'tornado.access': {},  # enable default logging
        'tornado.general': {},  #
        'rpi': {
            'level': LOG_LEVEL
        }
    }
}

logconfig.initialize_logging(SYSLOG_TAG, SYSLOG_FACILITY, LOGGERS,
                             LOG_LEVEL, USE_SYSLOG)

if not Path(options.tmp_dir).exists():
    try:
        Path(options.tmp_dir).mkdir(parents=True)  # 'exist_ok' not exists in Python3.4
    except FileExistsError:
        pass