98 lines
2.6 KiB
Python
98 lines
2.6 KiB
Python
"""
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Log like a forester!
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"""
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import sys
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from functools import partial
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import logging
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import colorlog # type: ignore
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from typing import Optional
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_proj_name = 'tractor'
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_default_loglevel = None
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# Super sexy formatting thanks to ``colorlog``.
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# (NOTE: we use the '{' format style)
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# Here, `thin_white` is just the layperson's gray.
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LOG_FORMAT = (
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# "{bold_white}{log_color}{asctime}{reset}"
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"{log_color}{asctime}{reset}"
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" {bold_white}{thin_white}({reset}"
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"{thin_white}{processName}: {threadName}{reset}{bold_white}{thin_white})"
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" {reset}{log_color}[{reset}{bold_log_color}{levelname}{reset}{log_color}]"
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" {log_color}{name}"
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" {thin_white}{filename}{log_color}:{reset}{thin_white}{lineno}{log_color}"
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" {reset}{bold_white}{thin_white}{message}"
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)
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DATE_FORMAT = '%b %d %H:%M:%S'
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LEVELS = {
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'GARBAGE': 1,
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'TRACE': 5,
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'PROFILE': 15,
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'QUIET': 1000,
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}
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STD_PALETTE = {
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'CRITICAL': 'red',
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'ERROR': 'red',
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'WARNING': 'yellow',
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'INFO': 'green',
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'DEBUG': 'white',
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'TRACE': 'cyan',
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'GARBAGE': 'blue',
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}
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BOLD_PALETTE = {
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'bold': {
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level: f"bold_{color}" for level, color in STD_PALETTE.items()}
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}
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def get_logger(name: str = None) -> logging.Logger:
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'''Return the package log or a sub-log for `name` if provided.
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'''
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log = rlog = logging.getLogger(_proj_name)
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if name and name != _proj_name:
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log = rlog.getChild(name)
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log.level = rlog.level
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# additional levels
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for name, val in LEVELS.items():
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logging.addLevelName(val, name)
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# ex. create ``log.trace()``
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setattr(log, name.lower(), partial(log.log, val))
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return log
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def get_console_log(level: str = None, name: str = None) -> logging.Logger:
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'''Get the package logger and enable a handler which writes to stderr.
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Yeah yeah, i know we can use ``DictConfig``. You do it...
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'''
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log = get_logger(name) # our root logger
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if not level:
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return log
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log.setLevel(level.upper() if not isinstance(level, int) else level)
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if not any(
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handler.stream == sys.stderr # type: ignore
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for handler in log.handlers if getattr(handler, 'stream', None)
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):
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handler = logging.StreamHandler()
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formatter = colorlog.ColoredFormatter(
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LOG_FORMAT,
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datefmt=DATE_FORMAT,
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log_colors=STD_PALETTE,
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secondary_log_colors=BOLD_PALETTE,
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style='{',
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)
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handler.setFormatter(formatter)
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log.addHandler(handler)
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return log
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def get_loglevel() -> Optional[str]:
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return _default_loglevel
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