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"""A formatter and StreamHandler for colorizing logging output."""
import logging
import sys
from certbot import util
class StreamHandler(logging.StreamHandler):
"""Sends colored logging output to a stream.
If the specified stream is not a tty, the class works like the
standard logging.StreamHandler. Default red_level is logging.WARNING.
:ivar bool colored: True if output should be colored
:ivar bool red_level: The level at which to output
"""
def __init__(self, stream=None):
if sys.version_info < (2, 7):
# pragma: no cover
# pylint: disable=non-parent-init-called
logging.StreamHandler.__init__(self, stream)
else:
super(StreamHandler, self).__init__(stream)
self.colored = (sys.stderr.isatty() if stream is None else
stream.isatty())
self.red_level = logging.WARNING
def format(self, record):
"""Formats the string representation of record.
:param logging.LogRecord record: Record to be formatted
:returns: Formatted, string representation of record
:rtype: str
"""
out = (logging.StreamHandler.format(self, record)
if sys.version_info < (2, 7)
else super(StreamHandler, self).format(record))
if self.colored and record.levelno >= self.red_level:
return ''.join((util.ANSI_SGR_RED, out, util.ANSI_SGR_RESET))
else:
return out
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