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395 lines
13 KiB
Python
395 lines
13 KiB
Python
from __future__ import absolute_import
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import contextlib
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import errno
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import logging
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import logging.handlers
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import os
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import sys
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from logging import Filter
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from pip._vendor.six import PY2
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from pip._internal.utils.compat import WINDOWS
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from pip._internal.utils.deprecation import DEPRECATION_MSG_PREFIX
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from pip._internal.utils.misc import ensure_dir, subprocess_logger
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try:
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import threading
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except ImportError:
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import dummy_threading as threading # type: ignore
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try:
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# Use "import as" and set colorama in the else clause to avoid mypy
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# errors and get the following correct revealed type for colorama:
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# `Union[_importlib_modulespec.ModuleType, None]`
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# Otherwise, we get an error like the following in the except block:
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# > Incompatible types in assignment (expression has type "None",
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# variable has type Module)
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# TODO: eliminate the need to use "import as" once mypy addresses some
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# of its issues with conditional imports. Here is an umbrella issue:
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# https://github.com/python/mypy/issues/1297
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from pip._vendor import colorama as _colorama
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# Lots of different errors can come from this, including SystemError and
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# ImportError.
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except Exception:
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colorama = None
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else:
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# Import Fore explicitly rather than accessing below as colorama.Fore
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# to avoid the following error running mypy:
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# > Module has no attribute "Fore"
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# TODO: eliminate the need to import Fore once mypy addresses some of its
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# issues with conditional imports. This particular case could be an
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# instance of the following issue (but also see the umbrella issue above):
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# https://github.com/python/mypy/issues/3500
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from pip._vendor.colorama import Fore
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colorama = _colorama
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_log_state = threading.local()
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_log_state.indentation = 0
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class BrokenStdoutLoggingError(Exception):
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"""
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Raised if BrokenPipeError occurs for the stdout stream while logging.
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"""
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pass
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# BrokenPipeError does not exist in Python 2 and, in addition, manifests
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# differently in Windows and non-Windows.
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if WINDOWS:
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# In Windows, a broken pipe can show up as EINVAL rather than EPIPE:
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# https://bugs.python.org/issue19612
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# https://bugs.python.org/issue30418
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if PY2:
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def _is_broken_pipe_error(exc_class, exc):
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"""See the docstring for non-Windows Python 3 below."""
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return (exc_class is IOError and
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exc.errno in (errno.EINVAL, errno.EPIPE))
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else:
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# In Windows, a broken pipe IOError became OSError in Python 3.
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def _is_broken_pipe_error(exc_class, exc):
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"""See the docstring for non-Windows Python 3 below."""
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return ((exc_class is BrokenPipeError) or # noqa: F821
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(exc_class is OSError and
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exc.errno in (errno.EINVAL, errno.EPIPE)))
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elif PY2:
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def _is_broken_pipe_error(exc_class, exc):
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"""See the docstring for non-Windows Python 3 below."""
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return (exc_class is IOError and exc.errno == errno.EPIPE)
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else:
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# Then we are in the non-Windows Python 3 case.
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def _is_broken_pipe_error(exc_class, exc):
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"""
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Return whether an exception is a broken pipe error.
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Args:
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exc_class: an exception class.
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exc: an exception instance.
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"""
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return (exc_class is BrokenPipeError) # noqa: F821
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@contextlib.contextmanager
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def indent_log(num=2):
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"""
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A context manager which will cause the log output to be indented for any
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log messages emitted inside it.
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"""
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_log_state.indentation += num
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try:
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yield
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finally:
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_log_state.indentation -= num
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def get_indentation():
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return getattr(_log_state, 'indentation', 0)
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class IndentingFormatter(logging.Formatter):
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def __init__(self, *args, **kwargs):
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"""
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A logging.Formatter that obeys the indent_log() context manager.
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:param add_timestamp: A bool indicating output lines should be prefixed
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with their record's timestamp.
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"""
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self.add_timestamp = kwargs.pop("add_timestamp", False)
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super(IndentingFormatter, self).__init__(*args, **kwargs)
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def get_message_start(self, formatted, levelno):
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"""
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Return the start of the formatted log message (not counting the
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prefix to add to each line).
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"""
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if levelno < logging.WARNING:
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return ''
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if formatted.startswith(DEPRECATION_MSG_PREFIX):
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# Then the message already has a prefix. We don't want it to
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# look like "WARNING: DEPRECATION: ...."
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return ''
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if levelno < logging.ERROR:
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return 'WARNING: '
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return 'ERROR: '
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def format(self, record):
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"""
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Calls the standard formatter, but will indent all of the log message
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lines by our current indentation level.
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"""
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formatted = super(IndentingFormatter, self).format(record)
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message_start = self.get_message_start(formatted, record.levelno)
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formatted = message_start + formatted
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prefix = ''
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if self.add_timestamp:
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# TODO: Use Formatter.default_time_format after dropping PY2.
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t = self.formatTime(record, "%Y-%m-%dT%H:%M:%S")
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prefix = '%s,%03d ' % (t, record.msecs)
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prefix += " " * get_indentation()
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formatted = "".join([
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prefix + line
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for line in formatted.splitlines(True)
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])
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return formatted
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def _color_wrap(*colors):
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def wrapped(inp):
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return "".join(list(colors) + [inp, colorama.Style.RESET_ALL])
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return wrapped
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class ColorizedStreamHandler(logging.StreamHandler):
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# Don't build up a list of colors if we don't have colorama
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if colorama:
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COLORS = [
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# This needs to be in order from highest logging level to lowest.
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(logging.ERROR, _color_wrap(Fore.RED)),
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(logging.WARNING, _color_wrap(Fore.YELLOW)),
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]
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else:
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COLORS = []
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def __init__(self, stream=None, no_color=None):
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logging.StreamHandler.__init__(self, stream)
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self._no_color = no_color
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if WINDOWS and colorama:
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self.stream = colorama.AnsiToWin32(self.stream)
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def _using_stdout(self):
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"""
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Return whether the handler is using sys.stdout.
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"""
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if WINDOWS and colorama:
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# Then self.stream is an AnsiToWin32 object.
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return self.stream.wrapped is sys.stdout
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return self.stream is sys.stdout
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def should_color(self):
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# Don't colorize things if we do not have colorama or if told not to
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if not colorama or self._no_color:
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return False
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real_stream = (
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self.stream if not isinstance(self.stream, colorama.AnsiToWin32)
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else self.stream.wrapped
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)
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# If the stream is a tty we should color it
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if hasattr(real_stream, "isatty") and real_stream.isatty():
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return True
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# If we have an ANSI term we should color it
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if os.environ.get("TERM") == "ANSI":
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return True
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# If anything else we should not color it
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return False
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def format(self, record):
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msg = logging.StreamHandler.format(self, record)
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if self.should_color():
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for level, color in self.COLORS:
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if record.levelno >= level:
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msg = color(msg)
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break
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return msg
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# The logging module says handleError() can be customized.
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def handleError(self, record):
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exc_class, exc = sys.exc_info()[:2]
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# If a broken pipe occurred while calling write() or flush() on the
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# stdout stream in logging's Handler.emit(), then raise our special
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# exception so we can handle it in main() instead of logging the
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# broken pipe error and continuing.
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if (exc_class and self._using_stdout() and
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_is_broken_pipe_error(exc_class, exc)):
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raise BrokenStdoutLoggingError()
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return super(ColorizedStreamHandler, self).handleError(record)
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class BetterRotatingFileHandler(logging.handlers.RotatingFileHandler):
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def _open(self):
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ensure_dir(os.path.dirname(self.baseFilename))
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return logging.handlers.RotatingFileHandler._open(self)
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class MaxLevelFilter(Filter):
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def __init__(self, level):
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self.level = level
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def filter(self, record):
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return record.levelno < self.level
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class ExcludeLoggerFilter(Filter):
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"""
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A logging Filter that excludes records from a logger (or its children).
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"""
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def filter(self, record):
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# The base Filter class allows only records from a logger (or its
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# children).
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return not super(ExcludeLoggerFilter, self).filter(record)
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def setup_logging(verbosity, no_color, user_log_file):
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"""Configures and sets up all of the logging
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Returns the requested logging level, as its integer value.
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"""
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# Determine the level to be logging at.
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if verbosity >= 1:
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level = "DEBUG"
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elif verbosity == -1:
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level = "WARNING"
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elif verbosity == -2:
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level = "ERROR"
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elif verbosity <= -3:
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level = "CRITICAL"
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else:
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level = "INFO"
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level_number = getattr(logging, level)
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# The "root" logger should match the "console" level *unless* we also need
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# to log to a user log file.
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include_user_log = user_log_file is not None
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if include_user_log:
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additional_log_file = user_log_file
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root_level = "DEBUG"
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else:
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additional_log_file = "/dev/null"
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root_level = level
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# Disable any logging besides WARNING unless we have DEBUG level logging
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# enabled for vendored libraries.
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vendored_log_level = "WARNING" if level in ["INFO", "ERROR"] else "DEBUG"
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# Shorthands for clarity
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log_streams = {
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"stdout": "ext://sys.stdout",
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"stderr": "ext://sys.stderr",
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}
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handler_classes = {
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"stream": "pip._internal.utils.logging.ColorizedStreamHandler",
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"file": "pip._internal.utils.logging.BetterRotatingFileHandler",
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}
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handlers = ["console", "console_errors", "console_subprocess"] + (
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["user_log"] if include_user_log else []
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)
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logging.config.dictConfig({
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"version": 1,
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"disable_existing_loggers": False,
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"filters": {
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"exclude_warnings": {
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"()": "pip._internal.utils.logging.MaxLevelFilter",
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"level": logging.WARNING,
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},
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"restrict_to_subprocess": {
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"()": "logging.Filter",
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"name": subprocess_logger.name,
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},
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"exclude_subprocess": {
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"()": "pip._internal.utils.logging.ExcludeLoggerFilter",
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"name": subprocess_logger.name,
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},
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},
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"formatters": {
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"indent": {
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"()": IndentingFormatter,
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"format": "%(message)s",
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},
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"indent_with_timestamp": {
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"()": IndentingFormatter,
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"format": "%(message)s",
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"add_timestamp": True,
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},
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},
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"handlers": {
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"console": {
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"level": level,
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"class": handler_classes["stream"],
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"no_color": no_color,
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"stream": log_streams["stdout"],
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"filters": ["exclude_subprocess", "exclude_warnings"],
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"formatter": "indent",
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},
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"console_errors": {
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"level": "WARNING",
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"class": handler_classes["stream"],
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"no_color": no_color,
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"stream": log_streams["stderr"],
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"filters": ["exclude_subprocess"],
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"formatter": "indent",
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},
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# A handler responsible for logging to the console messages
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# from the "subprocessor" logger.
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"console_subprocess": {
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"level": level,
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"class": handler_classes["stream"],
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"no_color": no_color,
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"stream": log_streams["stderr"],
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"filters": ["restrict_to_subprocess"],
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"formatter": "indent",
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},
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"user_log": {
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"level": "DEBUG",
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"class": handler_classes["file"],
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"filename": additional_log_file,
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"delay": True,
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"formatter": "indent_with_timestamp",
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},
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},
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"root": {
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"level": root_level,
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"handlers": handlers,
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},
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"loggers": {
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"pip._vendor": {
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"level": vendored_log_level
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}
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},
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})
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return level_number
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