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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