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EDIT :: logging.py

import contextlib import errno import logging import logging.handlers import os import sys from logging import Filter from typing import IO, Any, Callable, Iterator, Optional, TextIO, Type, cast from pip._internal.utils._log import VERBOSE, getLogger from pip._internal.utils.compat import WINDOWS from pip._internal.utils.deprecation import DEPRECATION_MSG_PREFIX from pip._internal.utils.misc import ensure_dir try: import threading except ImportError: import dummy_threading as threading # type: ignore try: from pip._vendor import colorama # Lots of different errors can come from this, including SystemError and # ImportError. except Exception: colorama = None _log_state = threading.local() subprocess_logger = getLogger("pip.subprocessor") class BrokenStdoutLoggingError(Exception): """ Raised if BrokenPipeError occurs for the stdout stream while logging. """ def _is_broken_pipe_error(exc_class: Type[BaseException], exc: BaseException) -> bool: if exc_class is BrokenPipeError: return True # On Windows, a broken pipe can show up as EINVAL rather than EPIPE: # https://bugs.python.org/issue19612 # https://bugs.python.org/issue30418 if not WINDOWS: return False return isinstance(exc, OSError) and exc.errno in (errno.EINVAL, errno.EPIPE) @contextlib.contextmanager def indent_log(num: int = 2) -> Iterator[None]: """ A context manager which will cause the log output to be indented for any log messages emitted inside it. """ # For thread-safety _log_state.indentation = get_indentation() _log_state.indentation += num try: yield finally: _log_state.indentation -= num def get_indentation() -> int: return getattr(_log_state, "indentation", 0) class IndentingFormatter(logging.Formatter): default_time_format = "%Y-%m-%dT%H:%M:%S" def __init__( self, *args: Any, add_timestamp: bool = False, **kwargs: Any, ) -> None: """ A logging.Formatter that obeys the indent_log() context manager. :param add_timestamp: A bool indicating output lines should be prefixed with their record's timestamp. """ self.add_timestamp = add_timestamp super().__init__(*args, **kwargs) def get_message_start(self, formatted: str, levelno: int) -> str: """ Return the start of the formatted log message (not counting the prefix to add to each line). """ if levelno < logging.WARNING: return "" if formatted.startswith(DEPRECATION_MSG_PREFIX): # Then the message already has a prefix. We don't want it to # look like "WARNING: DEPRECATION: ...." return "" if levelno < logging.ERROR: return "WARNING: " return "ERROR: " def format(self, record: logging.LogRecord) -> str: """ Calls the standard formatter, but will indent all of the log message lines by our current indentation level. """ formatted = super().format(record) message_start = self.get_message_start(formatted, record.levelno) formatted = message_start + formatted prefix = "" if self.add_timestamp: prefix = f"{self.formatTime(record)} " prefix += " " * get_indentation() formatted = "".join([prefix + line for line in formatted.splitlines(True)]) return formatted def _color_wrap(*colors: str) -> Callable[[str], str]: def wrapped(inp: str) -> str: return "".join(list(colors) + [inp, colorama.Style.RESET_ALL]) return wrapped class ColorizedStreamHandler(logging.StreamHandler): # Don't build up a list of colors if we don't have colorama if colorama: COLORS = [ # This needs to be in order from highest logging level to lowest. (logging.ERROR, _color_wrap(colorama.Fore.RED)), (logging.WARNING, _color_wrap(colorama.Fore.YELLOW)), ] else: COLORS = [] def __init__(self, stream: Optional[TextIO] = None, no_color: bool = None) -> None: super().__init__(stream) self._no_color = no_color if WINDOWS and colorama: self.stream = colorama.AnsiToWin32(self.stream) def _using_stdout(self) -> bool: """ Return whether the handler is using sys.stdout. """ if WINDOWS and colorama: # Then self.stream is an AnsiToWin32 object. stream = cast(colorama.AnsiToWin32, self.stream) return stream.wrapped is sys.stdout return self.stream is sys.stdout def should_color(self) -> bool: # Don't colorize things if we do not have colorama or if told not to if not colorama or self._no_color: return False real_stream = ( self.stream if not isinstance(self.stream, colorama.AnsiToWin32) else self.stream.wrapped ) # If the stream is a tty we should color it if hasattr(real_stream, "isatty") and real_stream.isatty(): return True # If we have an ANSI term we should color it if os.environ.get("TERM") == "ANSI": return True # If anything else we should not color it return False def format(self, record: logging.LogRecord) -> str: msg = super().format(record) if self.should_color(): for level, color in self.COLORS: if record.levelno >= level: msg = color(msg) break return msg # The logging module says handleError() can be customized. def handleError(self, record: logging.LogRecord) -> None: exc_class, exc = sys.exc_info()[:2] # If a broken pipe occurred while calling write() or flush() on the # stdout stream in logging's Handler.emit(), then raise our special # exception so we can handle it in main() instead of logging the # broken pipe error and continuing. if ( exc_class and exc and self._using_stdout() and _is_broken_pipe_error(exc_class, exc) ): raise BrokenStdoutLoggingError() return super().handleError(record) class BetterRotatingFileHandler(logging.handlers.RotatingFileHandler): def _open(self) -> IO[Any]: ensure_dir(os.path.dirname(self.baseFilename)) return super()._open() class MaxLevelFilter(Filter): def __init__(self, level: int) -> None: self.level = level def filter(self, record: logging.LogRecord) -> bool: return record.levelno < self.level class ExcludeLoggerFilter(Filter): """ A logging Filter that excludes records from a logger (or its children). """ def filter(self, record: logging.LogRecord) -> bool: # The base Filter class allows only records from a logger (or its # children). return not super().filter(record) def setup_logging(verbosity: int, no_color: bool, user_log_file: Optional[str]) -> int: """Configures and sets up all of the logging Returns the requested logging level, as its integer value. """ # Determine the level to be logging at. if verbosity >= 2: level_number = logging.DEBUG elif verbosity == 1: level_number = VERBOSE elif verbosity == -1: level_number = logging.WARNING elif verbosity == -2: level_number = logging.ERROR elif verbosity <= -3: level_number = logging.CRITICAL else: level_number = logging.INFO level = logging.getLevelName(level_number) # The "root" logger should match the "console" level *unless* we also need # to log to a user log file. include_user_log = user_log_file is not None if include_user_log: additional_log_file = user_log_file root_level = "DEBUG" else: additional_log_file = "/dev/null" root_level = level # Disable any logging besides WARNING unless we have DEBUG level logging # enabled for vendored libraries. vendored_log_level = "WARNING" if level in ["INFO", "ERROR"] else "DEBUG" # Shorthands for clarity log_streams = { "stdout": "ext://sys.stdout", "stderr": "ext://sys.stderr", } handler_classes = { "stream": "pip._internal.utils.logging.ColorizedStreamHandler", "file": "pip._internal.utils.logging.BetterRotatingFileHandler", } handlers = ["console", "console_errors", "console_subprocess"] + ( ["user_log"] if include_user_log else [] ) logging.config.dictConfig( { "version": 1, "disable_existing_loggers": False, "filters": { "exclude_warnings": { "()": "pip._internal.utils.logging.MaxLevelFilter", "level": logging.WARNING, }, "restrict_to_subprocess": { "()": "logging.Filter", "name": subprocess_logger.name, }, "exclude_subprocess": { "()": "pip._internal.utils.logging.ExcludeLoggerFilter", "name": subprocess_logger.name, }, }, "formatters": { "indent": { "()": IndentingFormatter, "format": "%(message)s", }, "indent_with_timestamp": { "()": IndentingFormatter, "format": "%(message)s", "add_timestamp": True, }, }, "handlers": { "console": { "level": level, "class": handler_classes["stream"], "no_color": no_color, "stream": log_streams["stdout"], "filters": ["exclude_subprocess", "exclude_warnings"], "formatter": "indent", }, "console_errors": { "level": "WARNING", "class": handler_classes["stream"], "no_color": no_color, "stream": log_streams["stderr"], "filters": ["exclude_subprocess"], "formatter": "indent", }, # A handler responsible for logging to the console messages # from the "subprocessor" logger. "console_subprocess": { "level": level, "class": handler_classes["stream"], "no_color": no_color, "stream": log_streams["stderr"], "filters": ["restrict_to_subprocess"], "formatter": "indent", }, "user_log": { "level": "DEBUG", "class": handler_classes["file"], "filename": additional_log_file, "encoding": "utf-8", "delay": True, "formatter": "indent_with_timestamp", }, }, "root": { "level": root_level, "handlers": handlers, }, "loggers": {"pip._vendor": {"level": vendored_log_level}}, } ) return level_number

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