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import textwrap
from logging import CRITICAL, DEBUG, INFO, Formatter
from logging import Logger as _Logger
from logging import StreamHandler as _StreamHandler
from logging import addLevelName, setLoggerClass, FileHandler, Filter
from plasTeX.Config import defaultConfig
MAX_WIDTH = 75
LOG_FORMAT = '[%(name)s] %(levelname)s: %(message)s'
STATUS_FORMAT = '%(message)s'
ROOT_LOG_FORMAT = '%(levelname)s: %(message)s'
DEBUG1 = DEBUG - 1
DEBUG2 = DEBUG - 2
DEBUG3 = DEBUG - 3
DEBUG4 = DEBUG - 4
DEBUG5 = DEBUG - 5
addLevelName(DEBUG1, 'DEBUG-1')
addLevelName(DEBUG2, 'DEBUG-2')
addLevelName(DEBUG3, 'DEBUG-3')
addLevelName(DEBUG4, 'DEBUG-4')
addLevelName(DEBUG5, 'DEBUG-5')
class Logger(_Logger):
def __init__(self, name='', *args, **kwargs):
_Logger.__init__(self, name, *args, **kwargs)
self.propagate = 0
level = locals().get(defaultConfig()['logging']['logging'].get(name))
if not name:
handler = StreamHandler()
handler.setFormatter(StreamFormatter(ROOT_LOG_FORMAT))
elif name in ['status', '(status)']:
handler = StatusHandler()
handler.setFormatter(StreamFormatter(STATUS_FORMAT))
level = INFO
else:
handler = StreamHandler()
handler.setFormatter(StreamFormatter(LOG_FORMAT))
self.addHandler(handler)
if level is not None:
self.setLevel(level)
def debug1(self, *args, **kwargs):
return self.log(DEBUG1, *args, **kwargs)
def debug2(self, *args, **kwargs):
return self.log(DEBUG2, *args, **kwargs)
def debug3(self, *args, **kwargs):
return self.log(DEBUG3, *args, **kwargs)
def debug4(self, *args, **kwargs):
return self.log(DEBUG4, *args, **kwargs)
def debug5(self, *args, **kwargs):
return self.log(DEBUG5, *args, **kwargs)
def dot(self):
return self.info('.')
class StreamFormatter(Formatter):
def format(self, record):
""" Format the specified record as text. """
record.message = record.getMessage()
if self._fmt.count("%(asctime)"):
record.asctime = self.formatTime(record, self.datefmt)
s = self._fmt % record.__dict__
if record.exc_info:
if s[-1] != "\n":
s = s + "\n"
s = s + self.formatException(record.exc_info)
return '\n '.join(textwrap.wrap(s, MAX_WIDTH))
class StreamHandler(_StreamHandler):
currentpos = 0
lastwrite = None
def emit(self, record):
""" Emit a record. """
try:
msg = self.format(record)
try:
self.checkLastWrite()
self.stream.write("%s\n" % msg)
except (UnicodeDecodeError, UnicodeEncodeError):
self.checkLastWrite()
self.stream.write("%s\n" % msg.encode("UTF-8"))
StreamHandler.currentpos = 0
StreamHandler.lastwrite = StreamHandler
self.flush()
except:
self.handleError(record)
def checkLastWrite(self):
if StreamHandler.lastwrite == StatusHandler:
self.stream.write('\n')
StreamHandler.currentpos = 0
def checkPos(self, length):
pos = StreamHandler.currentpos
if pos and pos + length > MAX_WIDTH:
self.stream.write('\n')
StreamHandler.currentpos = 0
StreamHandler.currentpos += length
class StatusHandler(StreamHandler):
""" StreamHandler with no newlines after each emit """
def emit(self, record):
""" Emit a record. """
try:
msg = self.format(record)
try:
self.checkPos(len(msg))
self.stream.write(msg)
except (UnicodeDecodeError, UnicodeEncodeError):
msg = msg.encode("UTF-8")
self.checkPos(len(msg))
self.stream.write(msg)
StreamHandler.lastwrite = StatusHandler
self.flush()
except:
self.handleError(record)
setLoggerClass(Logger)
root = Logger()
_loggers = {None:root}
def getLogger(name=None):
"""
Return a logger with the specified name, creating it if necessary.
If no name is specified, return the root logger.
"""
if name:
logger = Logger.manager.getLogger(name)
_loggers[name] = logger
return logger
else:
return root
def disableLogging():
""" Disable all logging """
for logger in list(_loggers.values()):
logger.setLevel(CRITICAL)
def fileLogging(fname):
"""
Remove all StreamHandlers;
Add a single FileHandler (filename given as arg);
Add a filter to omit dots.
"""
def dotfilter(record):
if not isinstance(record.msg, str) or record.msg.strip() != '.':
return True
logfilter = Filter()
logfilter.filter = dotfilter
fhandler = FileHandler(fname, 'w')
for logger in list(_loggers.values()):
for handler in logger.handlers:
logger.removeHandler(handler)
logger.addHandler(fhandler)
logger.addFilter(logfilter)
def updateLogLevels(levels):
"""
Update logging levels from dictionary
whose keys are logger names and values are levels
(both are strings).
Non-existent loggers are created.
Loggers whose names are not keys of the input dictionary are unaffected.
"""
for name, lvl in levels.items():
getLogger(None if name == 'root' else name).setLevel(lvl)
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