Current File : //opt/alt/python35/lib/python3.5/site-packages/pip/_internal/utils/logging.py
# The following comment should be removed at some point in the future.
# mypy: disallow-untyped-defs=False
from __future__ import absolute_import
import contextlib
import errno
import logging
import logging.handlers
import os
import sys
from logging import Filter, getLogger
from pip._vendor.six import PY2
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:
# Use "import as" and set colorama in the else clause to avoid mypy
# errors and get the following correct revealed type for colorama:
# `Union[_importlib_modulespec.ModuleType, None]`
# Otherwise, we get an error like the following in the except block:
# > Incompatible types in assignment (expression has type "None",
# variable has type Module)
# TODO: eliminate the need to use "import as" once mypy addresses some
# of its issues with conditional imports. Here is an umbrella issue:
# https://github.com/python/mypy/issues/1297
from pip._vendor import colorama as _colorama
# Lots of different errors can come from this, including SystemError and
# ImportError.
except Exception:
colorama = None
else:
# Import Fore explicitly rather than accessing below as colorama.Fore
# to avoid the following error running mypy:
# > Module has no attribute "Fore"
# TODO: eliminate the need to import Fore once mypy addresses some of its
# issues with conditional imports. This particular case could be an
# instance of the following issue (but also see the umbrella issue above):
# https://github.com/python/mypy/issues/3500
from pip._vendor.colorama import Fore
colorama = _colorama
_log_state = threading.local()
subprocess_logger = getLogger('pip.subprocessor')
class BrokenStdoutLoggingError(Exception):
"""
Raised if BrokenPipeError occurs for the stdout stream while logging.
"""
pass
# BrokenPipeError does not exist in Python 2 and, in addition, manifests
# differently in Windows and non-Windows.
if WINDOWS:
# In Windows, a broken pipe can show up as EINVAL rather than EPIPE:
# https://bugs.python.org/issue19612
# https://bugs.python.org/issue30418
if PY2:
def _is_broken_pipe_error(exc_class, exc):
"""See the docstring for non-Windows Python 3 below."""
return (exc_class is IOError and
exc.errno in (errno.EINVAL, errno.EPIPE))
else:
# In Windows, a broken pipe IOError became OSError in Python 3.
def _is_broken_pipe_error(exc_class, exc):
"""See the docstring for non-Windows Python 3 below."""
return ((exc_class is BrokenPipeError) or # noqa: F821
(exc_class is OSError and
exc.errno in (errno.EINVAL, errno.EPIPE)))
elif PY2:
def _is_broken_pipe_error(exc_class, exc):
"""See the docstring for non-Windows Python 3 below."""
return (exc_class is IOError and exc.errno == errno.EPIPE)
else:
# Then we are in the non-Windows Python 3 case.
def _is_broken_pipe_error(exc_class, exc):
"""
Return whether an exception is a broken pipe error.
Args:
exc_class: an exception class.
exc: an exception instance.
"""
return (exc_class is BrokenPipeError) # noqa: F821
@contextlib.contextmanager
def indent_log(num=2):
"""
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():
return getattr(_log_state, 'indentation', 0)
class IndentingFormatter(logging.Formatter):
def __init__(self, *args, **kwargs):
"""
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 = kwargs.pop("add_timestamp", False)
super(IndentingFormatter, self).__init__(*args, **kwargs)
def get_message_start(self, formatted, levelno):
"""
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):
"""
Calls the standard formatter, but will indent all of the log message
lines by our current indentation level.
"""
formatted = super(IndentingFormatter, self).format(record)
message_start = self.get_message_start(formatted, record.levelno)
formatted = message_start + formatted
prefix = ''
if self.add_timestamp:
# TODO: Use Formatter.default_time_format after dropping PY2.
t = self.formatTime(record, "%Y-%m-%dT%H:%M:%S")
prefix = '{t},{record.msecs:03.0f} '.format(**locals())
prefix += " " * get_indentation()
formatted = "".join([
prefix + line
for line in formatted.splitlines(True)
])
return formatted
def _color_wrap(*colors):
def wrapped(inp):
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(Fore.RED)),
(logging.WARNING, _color_wrap(Fore.YELLOW)),
]
else:
COLORS = []
def __init__(self, stream=None, no_color=None):
logging.StreamHandler.__init__(self, stream)
self._no_color = no_color
if WINDOWS and colorama:
self.stream = colorama.AnsiToWin32(self.stream)
def _using_stdout(self):
"""
Return whether the handler is using sys.stdout.
"""
if WINDOWS and colorama:
# Then self.stream is an AnsiToWin32 object.
return self.stream.wrapped is sys.stdout
return self.stream is sys.stdout
def should_color(self):
# 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):
msg = logging.StreamHandler.format(self, 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):
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 self._using_stdout() and
_is_broken_pipe_error(exc_class, exc)):
raise BrokenStdoutLoggingError()
return super(ColorizedStreamHandler, self).handleError(record)
class BetterRotatingFileHandler(logging.handlers.RotatingFileHandler):
def _open(self):
ensure_dir(os.path.dirname(self.baseFilename))
return logging.handlers.RotatingFileHandler._open(self)
class MaxLevelFilter(Filter):
def __init__(self, level):
self.level = level
def filter(self, record):
return record.levelno < self.level
class ExcludeLoggerFilter(Filter):
"""
A logging Filter that excludes records from a logger (or its children).
"""
def filter(self, record):
# The base Filter class allows only records from a logger (or its
# children).
return not super(ExcludeLoggerFilter, self).filter(record)
def setup_logging(verbosity, no_color, user_log_file):
"""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 >= 1:
level = "DEBUG"
elif verbosity == -1:
level = "WARNING"
elif verbosity == -2:
level = "ERROR"
elif verbosity <= -3:
level = "CRITICAL"
else:
level = "INFO"
level_number = getattr(logging, level)
# 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,
"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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