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import logging |
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import sys |
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from pathlib import Path |
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from typing import Optional |
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import regex |
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from loguru import logger |
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from loguru._logger import Logger |
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from typeddfs import FileFormat |
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_LOGGER_ARG_PATTERN = regex.compile(r"(?:[A-Z]+:)??(.*)", flags=regex.V1) |
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class InterceptHandler(logging.Handler): |
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""" |
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Redirects standard logging to loguru. |
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""" |
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def emit(self, record): |
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# Get corresponding Loguru level if it exists |
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try: |
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level = logger.level(record.levelname).name |
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except ValueError: |
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level = record.levelno |
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# Find caller from where originated the logged message |
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frame, depth = logging.currentframe(), 2 |
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while frame.f_code.co_filename == logging.__file__: |
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frame = frame.f_back |
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depth += 1 |
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logger.opt(depth=depth, exception=record.exc_info).log(level, record.getMessage()) |
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def _notice(__message: str, *args, **kwargs): |
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return logger.log("NOTICE", __message, *args, **kwargs) |
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def _caution(__message: str, *args, **kwargs): |
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return logger.log("CAUTION", __message, *args, **kwargs) |
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class MyLogger(Logger): |
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""" |
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A wrapper that has a fake notice() method to trick static analysis. |
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""" |
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def notice(self, __message: str, *args, **kwargs): |
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raise NotImplementedError() # not real |
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def caution(self, __message: str, *args, **kwargs): |
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raise NotImplementedError() # not real |
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class MandosLogging: |
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# this is required for mandos to run |
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DEFAULT_LEVEL: str = "NOTICE" |
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@classmethod |
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def init(cls) -> None: |
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""" |
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Sets an initial configuration. |
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""" |
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cls._init() |
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cls.redirect_std_logging() |
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cls.set_main_level(MandosLogging.DEFAULT_LEVEL) |
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@classmethod |
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def _init(cls) -> None: |
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try: |
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logger.level("NOTICE", no=35) |
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except TypeError: |
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# this happens if it's already been added (e.g. from an outside library) |
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# if we don't have it set after this, we'll find out soon enough |
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logger.debug("Could not add 'NOTICE' loguru level. Did you already set it?") |
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try: |
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logger.level("CAUTION", no=25) |
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except TypeError: |
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logger.debug("Could not add 'CAUTION' loguru level. Did you already set it?") |
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logger.notice = _notice |
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logger.caution = _caution |
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@classmethod |
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def redirect_std_logging(cls, level: int = 10) -> None: |
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# 10 b/c we're really never going to want trace output |
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logging.basicConfig(handlers=[InterceptHandler()], level=level) |
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@classmethod |
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def set_main_level(cls, level: str) -> None: |
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logger.remove() |
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logger.add(sys.stderr, level=level) |
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@classmethod |
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def disable_main(cls) -> None: |
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logger.remove() |
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@classmethod |
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def add_path_logger(cls, path: Path, level: str) -> None: |
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serialize = FileFormat.from_path(path) is FileFormat.json |
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compression = FileFormat.compression_from_path(path).name.lstrip(".") |
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logger.add( |
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str(path), |
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level=level, |
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compression=compression, |
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serialize=serialize, |
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backtrace=True, |
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diagnose=True, |
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enqueue=True, |
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) |
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class MandosSetup: |
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LEVELS = ["off", "error", "notice", "warning", "caution", "info", "debug"] |
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ALIASES = dict(none="off", no="off", verbose="info", quiet="error") |
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def __call__( |
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self, |
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log: Optional[Path] = None, |
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level: str = MandosLogging.DEFAULT_LEVEL, |
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skip: bool = False, |
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) -> None: |
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""" |
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This function controls all aspects of the logging as set via command-line. |
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Args: |
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level: The level for stderr |
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log: If set, the path to a file. Can be prefixed with ``:level:`` to set the level |
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(e.g. ``:INFO:mandos-run.log.gz``). Can serialize to JSON if .json is used |
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instead of .log or .txt. |
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""" |
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if skip: |
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return |
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level = MandosSetup.ALIASES.get(level.lower(), level).upper() |
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if level not in MandosSetup.LEVELS: |
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_permitted = ", ".join([*MandosSetup.LEVELS, *MandosSetup.ALIASES.keys()]) |
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raise ValueError(f"{level} not a permitted log level (allowed: {_permitted}") |
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if level == "OFF": |
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MandosLogging.disable_main() |
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else: |
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MandosLogging.set_main_level(level) |
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match = _LOGGER_ARG_PATTERN.match(str(log)) |
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if log is not None: |
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path_level = "DEBUG" if match.group(1) is None else match.group(1) |
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path = Path(match.group(2)) |
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MandosLogging.add_path_logger(path, path_level) |
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logger.info(f"Added logger to {path} at level {path_level}") |
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logger.notice(f"Ready. Set log level to {level}") |
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# weird as hell, but it works |
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# noinspection PyTypeChecker |
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logger: MyLogger = logger |
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MANDOS_SETUP = MandosSetup() |
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