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from __future__ import absolute_import
import contextlib
import logging
import logging.handlers
import os
try:
import threading
except ImportError:
import dummy_threading as threading
from pip.compat import WINDOWS
from pip.utils import ensure_dir
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()
_log_state.indentation = 0
@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.
"""
_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 format(self, record):
"""
Calls the standard formatter, but will indent all of the log messages
by our current indentation level.
"""
formatted = logging.Formatter.format(self, record)
formatted = "".join([
(" " * get_indentation()) + 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(colorama.Fore.RED)),
(logging.WARNING, _color_wrap(colorama.Fore.YELLOW)),
]
else:
COLORS = []
def __init__(self, stream=None):
logging.StreamHandler.__init__(self, stream)
if WINDOWS and colorama:
self.stream = colorama.AnsiToWin32(self.stream)
def should_color(self):
# Don't colorize things if we do not have colorama
if not colorama:
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 ASNI 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
class BetterRotatingFileHandler(logging.handlers.RotatingFileHandler):
def _open(self):
ensure_dir(os.path.dirname(self.baseFilename))
return logging.handlers.RotatingFileHandler._open(self)
class MaxLevelFilter(logging.Filter):
def __init__(self, level):
self.level = level
def filter(self, record):
return record.levelno < self.level