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#!/usr/bin/python
# Copyright (C) 2010 Canonical
#
# Authors:
# Geliy Sokolov
# Michael Vogt
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; version 3.
#
# This program 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 General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
import logging
import logging.handlers
import os.path
from paths import SOFTWARE_CENTER_CACHE_DIR
""" setup global logging for software-center """
class NullFilterThatWarnsAboutRootLoggerUsage(logging.Filter):
""" pass all messages through, but warn about messages that
come from the root logger (and not from the softwarecenter root)
"""
def filter(self, record):
if not record.name.startswith("softwarecenter"):
fixme_msg = logging.getLogger("softwarecenter.fixme").findCaller()
s = "logs to the root logger: '%s'" % str(fixme_msg)
logging.getLogger("softwarecenter.fixme").warn(s)
return 1
class OrFilter(logging.Filter):
""" A filter that can have multiple filter strings and shows
the message if any of the filter strings matches
"""
def __init__(self):
self.filters = []
def filter(self, record):
for (fname,flen) in self.filters:
if (flen == 0 or
fname == record.name or
(len(record.name)>flen and record.name[flen] == ".")):
return 1
return 0
def add(self, log_filter):
""" add a log_filter string to the list of OR expressions """
self.filters.append((log_filter, len(log_filter)))
def add_filters_from_string(long_filter_str):
""" take the string passed from e.g. the commandline and create
logging.Filters for it. It will prepend "softwarecenter."
if that is not passed and will split "," to support mulitple
filters
"""
logging.debug("adding filter: '%s'" % long_filter_str)
logfilter = OrFilter()
for filter_str in long_filter_str.split(","):
filter_str = filter_str.strip("")
if filter_str == "":
return
if not (filter_str.startswith("sc") or
filter_str.startswith("softwarecenter")):
filter_str = "sc.%s" % filter_str
if filter_str.startswith("sc"):
filter_str = "softwarecenter" + filter_str[2:]
logfilter.add(filter_str)
# attach or filter
handler.addFilter(logfilter)
# setup global software-center logging
root = logging.getLogger()
fmt = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s", None)
handler = logging.StreamHandler()
handler.setFormatter(fmt)
root.addHandler(handler)
handler.addFilter(NullFilterThatWarnsAboutRootLoggerUsage())
# create log file
if not os.path.exists(SOFTWARE_CENTER_CACHE_DIR):
os.makedirs(SOFTWARE_CENTER_CACHE_DIR)
logfile_path = os.path.join(SOFTWARE_CENTER_CACHE_DIR, "software-center.log")
# try to fix inaccessible s-c directory (#688682)
if not os.access(SOFTWARE_CENTER_CACHE_DIR, os.W_OK):
logging.warn("found not writable '%s' dir, trying to fix" % SOFTWARE_CENTER_CACHE_DIR)
# if we have to do more renames, soemthing else is wrong and its
# ok to crash later to learn about the problem
for i in range(10):
target = "%s.%s" % (SOFTWARE_CENTER_CACHE_DIR, i)
if not os.path.exists(target):
os.rename(SOFTWARE_CENTER_CACHE_DIR, target)
break
os.makedirs(SOFTWARE_CENTER_CACHE_DIR)
# according to bug 688682 many people have a non-writeable logfile
if os.path.exists(logfile_path) and not os.access(logfile_path, os.W_OK):
try:
logging.warn("trying to fix non-writeable logfile")
os.remove(logfile_path)
except:
logging.exception("failed to fix non-writeable logfile")
logfile_handler = logging.handlers.RotatingFileHandler(logfile_path,
maxBytes=100*1000,
backupCount=5)
logfile_handler.setLevel(logging.INFO)
logfile_handler.setFormatter(fmt)
root.addHandler(logfile_handler)
root.setLevel(logging.INFO)
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