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import toml
import yaml
import logging
import os
from . import validators
from os.path import join, isdir, isfile
from typing import Optional, Any, MutableMapping
from argparse import ArgumentParser
from ..util import parse_addr
my_validators = {}
def _get_validator(name: str) -> Optional[callable]:
if hasattr(validators, f'{name}_validator'):
return getattr(validators, f'{name}_validator')
if name in my_validators:
return my_validators[name]
return None
def add_validator(name: str, f: callable):
my_validators[name] = f
class ConfigUnit:
NAME = 'dumb'
data: MutableMapping[str, Any]
@classmethod
def get_config_path(cls, name=None) -> str:
if name is None:
name = cls.NAME
if name is None:
raise ValueError('get_config_path: name is none')
dirnames = (
join(os.environ['HOME'], '.config', 'homekit'),
'/etc/homekit'
)
for dirname in dirnames:
if isdir(dirname):
for fmt in ('toml', 'yaml'):
filename = join(dirname, f'{name}.{fmt}')
if isfile(filename):
return filename
raise IOError(f'config \'{name}\' not found')
def __init__(self, name=None):
self.data = {}
if self.NAME != 'dumb':
self.load_from(self.get_config_path())
self.validate()
elif name is not None:
self.NAME = name
def load_from(self, path: str):
if path.endswith('.toml'):
self.data = toml.load(path)
elif path.endswith('.yaml'):
with open(path, 'r') as fd:
self.data = yaml.safe_load(fd)
def validate(self):
v = _get_validator(self.NAME)
v(self.data)
def __getitem__(self, key):
return self.data[key]
def __setitem__(self, key, value):
raise NotImplementedError('overwriting config values is prohibited')
def __contains__(self, key):
return key in self.data
def get(self, key: str, default=None):
cur = self.data
pts = key.split('.')
for i in range(len(pts)):
k = pts[i]
if i < len(pts)-1:
if k not in cur:
raise KeyError(f'key {k} not found')
else:
return cur[k] if k in cur else default
cur = self.data[k]
raise KeyError(f'option {key} not found')
def get_addr(self, key: str):
return parse_addr(self.get(key))
def items(self):
return self.data.items()
class Config:
app_name: Optional[str]
app_config: ConfigUnit
def __init__(self):
self.app_name = None
self.app_config = ConfigUnit()
def load_app(self,
name: Optional[str] = None,
use_cli=True,
parser: ArgumentParser = None):
self.app_name = name
if (name is None) and (not use_cli):
raise RuntimeError('either config name must be none or use_cli must be True')
log_default_fmt = False
log_file = None
log_verbose = False
no_config = name is False
path = None
if use_cli:
if parser is None:
parser = ArgumentParser()
if not no_config:
parser.add_argument('-c', '--config', type=str, required=name is None,
help='Path to the config in TOML or YAML format')
parser.add_argument('-V', '--verbose', action='store_true')
parser.add_argument('--log-file', type=str)
parser.add_argument('--log-default-fmt', action='store_true')
args = parser.parse_args()
if not no_config and args.config:
path = args.config
if args.verbose:
log_verbose = True
if args.log_file:
log_file = args.log_file
if args.log_default_fmt:
log_default_fmt = args.log_default_fmt
if not no_config and path is None:
path = ConfigUnit.get_config_path(name=name)
if not no_config:
self.app_config.load_from(path)
if 'logging' in self.app_config:
if not log_file and 'file' in self.app_config['logging']:
log_file = self.app_config['logging']['file']
if log_default_fmt and 'default_fmt' in self.app_config['logging']:
log_default_fmt = self.app_config['logging']['default_fmt']
setup_logging(log_verbose, log_file, log_default_fmt)
if use_cli:
return args
config = Config()
app_config = config.app_config
def is_development_mode() -> bool:
if 'HK_MODE' in os.environ and os.environ['HK_MODE'] == 'dev':
return True
return ('logging' in config.app_config) and ('verbose' in config.app_config['logging']) and (config.app_config['logging']['verbose'] is True)
def setup_logging(verbose=False, log_file=None, default_fmt=False):
logging_level = logging.INFO
if is_development_mode() or verbose:
logging_level = logging.DEBUG
_add_logging_level('TRACE', logging.DEBUG-5)
log_config = {'level': logging_level}
if not default_fmt:
log_config['format'] = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
if log_file is not None:
log_config['filename'] = log_file
log_config['encoding'] = 'utf-8'
logging.basicConfig(**log_config)
# https://stackoverflow.com/questions/2183233/how-to-add-a-custom-loglevel-to-pythons-logging-facility/35804945#35804945
def _add_logging_level(levelName, levelNum, methodName=None):
"""
Comprehensively adds a new logging level to the `logging` module and the
currently configured logging class.
`levelName` becomes an attribute of the `logging` module with the value
`levelNum`. `methodName` becomes a convenience method for both `logging`
itself and the class returned by `logging.getLoggerClass()` (usually just
`logging.Logger`). If `methodName` is not specified, `levelName.lower()` is
used.
To avoid accidental clobberings of existing attributes, this method will
raise an `AttributeError` if the level name is already an attribute of the
`logging` module or if the method name is already present
Example
-------
>>> addLoggingLevel('TRACE', logging.DEBUG - 5)
>>> logging.getLogger(__name__).setLevel("TRACE")
>>> logging.getLogger(__name__).trace('that worked')
>>> logging.trace('so did this')
>>> logging.TRACE
5
"""
if not methodName:
methodName = levelName.lower()
if hasattr(logging, levelName):
raise AttributeError('{} already defined in logging module'.format(levelName))
if hasattr(logging, methodName):
raise AttributeError('{} already defined in logging module'.format(methodName))
if hasattr(logging.getLoggerClass(), methodName):
raise AttributeError('{} already defined in logger class'.format(methodName))
# This method was inspired by the answers to Stack Overflow post
# http://stackoverflow.com/q/2183233/2988730, especially
# http://stackoverflow.com/a/13638084/2988730
def logForLevel(self, message, *args, **kwargs):
if self.isEnabledFor(levelNum):
self._log(levelNum, message, args, **kwargs)
def logToRoot(message, *args, **kwargs):
logging.log(levelNum, message, *args, **kwargs)
logging.addLevelName(levelNum, levelName)
setattr(logging, levelName, levelNum)
setattr(logging.getLoggerClass(), methodName, logForLevel)
setattr(logging, methodName, logToRoot)
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