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# Copyright 2010 Google Inc. All Rights Reserved.
from itertools import chain
import gzip
import logging
import logging.handlers
import time
import traceback
def SetUpRootLogger(filename=None, level=None, display_flags={}):
console_handler = logging.StreamHandler()
console_handler.setFormatter(CustomFormatter(AnsiColorCoder(), display_flags))
logging.root.addHandler(console_handler)
if filename:
file_handler = logging.handlers.RotatingFileHandler(
filename,
maxBytes=10 * 1024 * 1024,
backupCount=9,
delay=True)
file_handler.setFormatter(CustomFormatter(NullColorCoder(), display_flags))
logging.root.addHandler(file_handler)
if level:
logging.root.setLevel(level)
class NullColorCoder(object):
def __call__(self, *args):
return ''
class AnsiColorCoder(object):
CODES = {'reset': (0,),
'bold': (1, 22),
'italics': (3, 23),
'underline': (4, 24),
'inverse': (7, 27),
'strikethrough': (9, 29),
'black': (30, 40),
'red': (31, 41),
'green': (32, 42),
'yellow': (33, 43),
'blue': (34, 44),
'magenta': (35, 45),
'cyan': (36, 46),
'white': (37, 47)}
def __call__(self, *args):
codes = []
for arg in args:
if arg.startswith('bg-') or arg.startswith('no-'):
codes.append(self.CODES[arg[3:]][1])
else:
codes.append(self.CODES[arg][0])
return '\033[%sm' % ';'.join(map(str, codes))
class CustomFormatter(logging.Formatter):
COLORS = {'DEBUG': ('white',),
'INFO': ('green',),
'WARN': ('yellow', 'bold'),
'ERROR': ('red', 'bold'),
'CRIT': ('red', 'inverse', 'bold')}
def __init__(self, coder, display_flags={}):
items = []
if display_flags.get('datetime', True):
items.append('%(asctime)s')
if display_flags.get('level', True):
items.append('%(levelname)s')
if display_flags.get('name', True):
items.append(coder('cyan') + '[%(threadName)s:%(name)s]' + coder('reset'))
items.append('%(prefix)s%(message)s')
logging.Formatter.__init__(self, fmt=' '.join(items))
self._coder = coder
def formatTime(self, record):
ct = self.converter(record.created)
t = time.strftime('%Y-%m-%d %H:%M:%S', ct)
return '%s.%02d' % (t, record.msecs / 10)
def formatLevelName(self, record):
if record.levelname in ['WARNING', 'CRITICAL']:
levelname = record.levelname[:4]
else:
levelname = record.levelname
return ''.join([self._coder(*self.COLORS[levelname]), levelname,
self._coder('reset')])
def formatMessagePrefix(self, record):
try:
return ' %s%s:%s ' % (self._coder('black', 'bold'), record.prefix,
self._coder('reset'))
except AttributeError:
return ''
def format(self, record):
if record.exc_info:
if not record.exc_text:
record.exc_text = self.formatException(record.exc_info)
else:
record.exc_text = ''
fmt = record.__dict__.copy()
fmt.update({'levelname': self.formatLevelName(record),
'asctime': self.formatTime(record),
'prefix': self.formatMessagePrefix(record)})
s = []
for line in chain(record.getMessage().splitlines(),
record.exc_text.splitlines()):
fmt['message'] = line
s.append(self._fmt % fmt)
return '\n'.join(s)
class CompressedFileHandler(logging.FileHandler):
def _open(self):
return gzip.open(self.baseFilename + '.gz', self.mode, 9)
def HandleUncaughtExceptions(fun):
"""Catches all exceptions that would go outside decorated fun scope."""
def _Interceptor(*args, **kwargs):
try:
return fun(*args, **kwargs)
except StandardError:
logging.exception('Uncaught exception:')
return _Interceptor
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