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# -*- coding: utf-8 -*-
import logging
import os
import sys
from django_extensions.management.signals import post_command, pre_command
def _make_writeable(filename):
"""
Make sure that the file is writeable. Useful if our source is
read-only.
"""
import stat
if sys.platform.startswith('java'):
# On Jython there is no os.access()
return
if not os.access(filename, os.W_OK):
st = os.stat(filename)
new_permissions = stat.S_IMODE(st.st_mode) | stat.S_IWUSR
os.chmod(filename, new_permissions)
def setup_logger(logger, stream, filename=None, fmt=None):
"""Sets up a logger (if no handlers exist) for console output,
and file 'tee' output if desired."""
if len(logger.handlers) < 1:
console = logging.StreamHandler(stream)
console.setLevel(logging.DEBUG)
console.setFormatter(logging.Formatter(fmt))
logger.addHandler(console)
logger.setLevel(logging.DEBUG)
if filename:
outfile = logging.FileHandler(filename)
outfile.setLevel(logging.INFO)
outfile.setFormatter(logging.Formatter("%(asctime)s " + (fmt if fmt else '%(message)s')))
logger.addHandler(outfile)
class RedirectHandler(logging.Handler):
"""Redirect logging sent to one logger (name) to another."""
def __init__(self, name, level=logging.DEBUG):
# Contemplate feasibility of copying a destination (allow original handler) and redirecting.
logging.Handler.__init__(self, level)
self.name = name
self.logger = logging.getLogger(name)
def emit(self, record):
self.logger.handle(record)
def signalcommand(func):
"""A decorator for management command handle defs that sends out a pre/post signal."""
def inner(self, *args, **kwargs):
pre_command.send(self.__class__, args=args, kwargs=kwargs)
ret = func(self, *args, **kwargs)
post_command.send(self.__class__, args=args, kwargs=kwargs, outcome=ret)
return ret
return inner
def has_ipdb():
try:
import ipdb # noqa
import IPython # noqa
return True
except ImportError:
return False
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