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# Copyright (C) 2007 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
import errno
import sys
import os
import logging
# Let's keep this self contained so that it can be easily
# pasted in external sugar service like the datastore.
def get_logs_dir():
profile = os.environ.get('SUGAR_PROFILE', 'default')
logs_dir = os.environ.get('SUGAR_LOGS_DIR',
os.path.join(os.path.expanduser('~'),
'.sugar', profile, 'logs'))
return logs_dir
def set_level(level):
levels = { 'error' : logging.ERROR,
'warning' : logging.WARNING,
'debug' : logging.DEBUG,
'info' : logging.INFO }
if levels.has_key(level):
logging.getLogger('').setLevel(levels[level])
# pylint: disable-msg=E1101,F0401
def _except_hook(exctype, value, traceback):
# Attempt to provide verbose IPython tracebacks.
# Importing IPython is slow, so we import it lazily.
try:
from IPython.ultraTB import AutoFormattedTB
sys.excepthook = AutoFormattedTB(mode='Verbose', color_scheme='NoColor')
except ImportError:
sys.excepthook = sys.__excepthook__
sys.excepthook(exctype, value, traceback)
def start(log_filename=None):
# remove existing handlers, or logging.basicConfig() won't have no effect.
root_logger = logging.getLogger('')
for handler in root_logger.handlers:
root_logger.removeHandler(handler)
class SafeLogWrapper(object):
"""Small file-like wrapper to gracefully handle ENOSPC errors when
logging."""
def __init__(self, stream):
self._stream = stream
def write(self, s):
try:
self._stream.write(s)
except IOError, e:
# gracefully deal w/ disk full
if e.errno != errno.ENOSPC:
raise e
def flush(self):
try:
self._stream.flush()
except IOError, e:
# gracefully deal w/ disk full
if e.errno != errno.ENOSPC:
raise e
logging.basicConfig(level=logging.WARNING,
format="%(created)f %(levelname)s %(name)s: %(message)s",
stream=SafeLogWrapper(sys.stderr))
if os.environ.has_key('SUGAR_LOGGER_LEVEL'):
set_level(os.environ['SUGAR_LOGGER_LEVEL'])
if log_filename and not sys.stdin.isatty():
try:
log_path = os.path.join(get_logs_dir(), log_filename + '.log')
log_fd = os.open(log_path, os.O_WRONLY | os.O_CREAT)
os.dup2(log_fd, sys.stdout.fileno())
os.dup2(log_fd, sys.stderr.fileno())
os.close(log_fd)
sys.stdout = SafeLogWrapper(sys.stdout)
sys.stderr = SafeLogWrapper(sys.stderr)
except OSError, e:
# if we're out of space, just continue
if e.errno != errno.ENOSPC:
raise e
sys.excepthook = _except_hook
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