/usr/lib/python3/dist-packages/plainbox/impl/logging.py is in python3-plainbox 0.5.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright 2012, 2013 Canonical Ltd.
# Written by:
# Zygmunt Krynicki <zygmunt.krynicki@canonical.com>
#
# Checkbox is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3,
# as published by the Free Software Foundation.
#
# Checkbox 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 Checkbox. If not, see <http://www.gnu.org/licenses/>.
"""
:mod:`plainbox.impl.logging` -- configuration for logging
=========================================================
.. warning::
THIS MODULE DOES NOT HAVE STABLE PUBLIC API
"""
__all__ = ['setup_logging', 'adjust_logging']
import logging
import logging.config
import os
import sys
from plainbox.i18n import gettext as _
from plainbox.impl.color import ansi_on, ansi_off
logger = logging.getLogger("plainbox.logging")
# XXX: enable ansi escape sequences if sys.std{out,err} are both TTYs
#
# This is a bad place to take this decision (ideally we'd do that per log
# handler) but it's rather hard to do correctly (handlers know where stuff
# goes, formatters decide how stuff looks like) so this half solution is
# better than nothing.
if sys.stdout.isatty() and sys.stderr.isatty():
ansi = ansi_on
else:
ansi = ansi_off
class ANSIFormatter(logging.Formatter):
"""
Formatter that allows to expand '{ansi}' (using new-style
python formatting syntax) inside format descriptions.
"""
def __init__(self, fmt=None, datefmt=None, style='%'):
if fmt is not None:
fmt = fmt.format(ansi=ansi)
super(ANSIFormatter, self).__init__(fmt, datefmt, style)
class LevelFilter:
"""
Log filter that accepts records in a certain level range
"""
def __init__(self, min_level="NOTSET", max_level="CRITICAL"):
self.min_level = logging._checkLevel(min_level)
self.max_level = logging._checkLevel(max_level)
def filter(self, record):
if self.min_level <= record.levelno <= self.max_level:
return 1
else:
return 0
class LoggingHelper:
"""
Helper class that manages logging subsystem
"""
def setup_logging(self):
config_dict = self.DEFAULT_CONFIG
# Ensure that the logging directory exists. This is important
# because we're about to open some files there. If it can't be created
# we fall back to a console-only config.
if not os.path.exists(self.log_dir):
# It seems that exists_ok is flaky
try:
os.makedirs(self.log_dir, exist_ok=True)
except OSError as error:
config_dict = self.DEFAULT_CONSOLE_ONLY_CONFIG
# Apply the selected configuration. This overrides anything currently
# defined for all of the logging subsystem in this python runtime
logging.config.dictConfig(config_dict)
def adjust_logging(self, level=None, trace_list=None, debug_console=False):
# Bump logging on the root logger if requested
if level is not None:
logging.getLogger(None).setLevel(level)
logger.debug(_("Enabled %r on root logger"), level)
logging.getLogger("plainbox").setLevel(level)
# Enable tracing on specified loggers
if trace_list is not None:
for name in trace_list:
logging.getLogger(name).setLevel(logging.DEBUG)
logger.debug(_("Enabled debugging on logger %r"), name)
if debug_console and (level == 'DEBUG' or trace_list):
# Enable DEBUG logging to console if explicitly requested
logging.config.dictConfig(self.DEBUG_CONSOLE_CONFIG)
@property
def log_dir(self):
"""
directory with all of the log files
"""
xdg_cache_home = os.environ.get('XDG_CACHE_HOME') or \
os.path.join(os.path.expanduser('~'), '.cache')
return os.path.join(xdg_cache_home, 'plainbox', 'logs')
@property
def DEFAULT_FORMATTERS(self):
"""
Reusable dictionary with the formatter configuration plainbox uses
"""
return {
"console_debug": {
"()": "plainbox.impl.logging.ANSIFormatter",
"format": (
"{ansi.f.BLACK}{ansi.s.BRIGHT}"
"%(levelname)s"
"{ansi.s.NORMAL}{ansi.f.RESET}"
" "
"{ansi.f.CYAN}{ansi.s.DIM}"
"%(name)s"
"{ansi.f.RESET}{ansi.s.NORMAL}"
": "
"{ansi.s.DIM}"
"%(message)s"
"{ansi.s.NORMAL}"
),
},
"console_info": {
"()": "plainbox.impl.logging.ANSIFormatter",
"format": (
"{ansi.f.WHITE}{ansi.s.BRIGHT}"
"%(levelname)s"
"{ansi.s.NORMAL}{ansi.f.RESET}"
" "
"{ansi.f.CYAN}{ansi.s.BRIGHT}"
"%(name)s"
"{ansi.f.RESET}{ansi.s.NORMAL}"
": "
"%(message)s"
),
},
"console_warning": {
"()": "plainbox.impl.logging.ANSIFormatter",
"format": (
"{ansi.f.YELLOW}{ansi.s.BRIGHT}"
"%(levelname)s"
"{ansi.f.RESET}{ansi.s.NORMAL}"
" "
"{ansi.f.CYAN}%(name)s{ansi.f.RESET}"
": "
"{ansi.f.WHITE}%(message)s{ansi.f.RESET}"
),
},
"console_error": {
"()": "plainbox.impl.logging.ANSIFormatter",
"format": (
"{ansi.f.RED}{ansi.s.BRIGHT}"
"%(levelname)s"
"{ansi.f.RESET}{ansi.s.NORMAL}"
" "
"{ansi.f.CYAN}%(name)s{ansi.f.RESET}"
": "
"{ansi.f.WHITE}%(message)s{ansi.f.RESET}"
),
},
"log_precise": {
"format": (
"%(asctime)s "
"[pid:%(process)s, thread:%(threadName)s, "
"reltime:%(relativeCreated)dms] "
"%(levelname)s %(name)s: %(message)s"
),
"datefmt": "%Y-%m-%d %H:%M:%S",
},
}
@property
def DEFAULT_FILTERS(self):
"""
Reusable dictionary with the filter configuration plainbox uses
"""
return {
"only_debug": {
"()": "plainbox.impl.logging.LevelFilter",
"max_level": "DEBUG",
},
"only_info": {
"()": "plainbox.impl.logging.LevelFilter",
"min_level": "INFO",
"max_level": "INFO",
},
"only_warnings": {
"()": "plainbox.impl.logging.LevelFilter",
"min_level": "WARNING",
"max_level": "WARNING",
},
}
@property
def DEFAULT_HANDLERS(self):
"""
Reusable dictionary with the handler configuration plainbox uses.
This configuration assumes the log file locations exist and are
writable.
"""
return {
"console_debug": {
"class": "logging.StreamHandler",
"stream": "ext://sys.stdout",
"formatter": "console_debug",
"filters": ["only_debug"],
"level": 150,
},
"console_info": {
"class": "logging.StreamHandler",
"stream": "ext://sys.stdout",
"formatter": "console_info",
"filters": ["only_info"],
},
"console_warning": {
"class": "logging.StreamHandler",
"stream": "ext://sys.stderr",
"formatter": "console_warning",
"filters": ["only_warnings"],
},
"console_error": {
"class": "logging.StreamHandler",
"stream": "ext://sys.stderr",
"formatter": "console_error",
"level": "ERROR",
},
"logfile_debug": {
"class": "logging.handlers.RotatingFileHandler",
"filename": os.path.join(self.log_dir, "debug.log"),
"maxBytes": 32 << 20,
"backupCount": 3,
"mode": "a",
"formatter": "log_precise",
"delay": True,
"filters": ["only_debug"],
},
"logfile_error": {
"class": "logging.handlers.RotatingFileHandler",
"filename": os.path.join(self.log_dir, "error.log"),
"backupCount": 3,
"level": "ERROR",
"mode": "a",
"formatter": "log_precise",
"delay": True,
},
"logfile_crash": {
"class": "logging.handlers.RotatingFileHandler",
"filename": os.path.join(self.log_dir, "crash.log"),
"backupCount": 3,
"level": "ERROR",
"mode": "a",
"formatter": "log_precise",
"delay": True,
},
}
@property
def DEFAULT_CONSOLE_ONLY_HANDLERS(self):
"""
Reusable dictionary with a handler configuration using only the
console for output.
"""
return {
"console_debug": {
"class": "logging.StreamHandler",
"stream": "ext://sys.stdout",
"formatter": "console_debug",
"filters": ["only_debug"],
"level": 150,
},
"console_info": {
"class": "logging.StreamHandler",
"stream": "ext://sys.stdout",
"formatter": "console_info",
"filters": ["only_info"],
},
"console_warning": {
"class": "logging.StreamHandler",
"stream": "ext://sys.stderr",
"formatter": "console_warning",
"filters": ["only_warnings"],
},
"console_error": {
"class": "logging.StreamHandler",
"stream": "ext://sys.stderr",
"formatter": "console_error",
"level": "ERROR",
},
}
@property
def DEFAULT_LOGGERS(self):
"""
Reusable dictionary with the logger configuration plainbox uses.
This configuration assumes the log file locations exist and are
writable.
"""
return {
"plainbox": {
"level": "WARNING",
"handlers": [
"console_debug",
"console_info",
"console_warning",
"console_error",
"logfile_error",
"logfile_debug",
],
},
"plainbox.crashes": {
"level": "ERROR",
"handlers": ["logfile_crash"],
},
}
@property
def DEFAULT_CONSOLE_ONLY_LOGGERS(self):
"""
Reusable dictionary with a logger configuration using only the
console for output.
"""
return {
"plainbox": {
"level": "WARNING",
"handlers": [
"console_debug",
"console_info",
"console_warning",
"console_error",
],
},
"plainbox.crashes": {
"level": "ERROR",
"handlers": ["console_error"],
},
}
@property
def DEFAULT_CONFIG(self):
"""
Plainbox logging configuration with logfiles and console.
"""
return {
"version": 1,
"formatters": self.DEFAULT_FORMATTERS,
"filters": self.DEFAULT_FILTERS,
"handlers": self.DEFAULT_HANDLERS,
"loggers": self.DEFAULT_LOGGERS,
"root": {
"level": "WARNING",
},
"incremental": False,
"disable_existing_loggers": True,
}
@property
def DEFAULT_CONSOLE_ONLY_CONFIG(self):
"""
Plainbox logging configuration with console output only.
"""
return {
"version": 1,
"formatters": self.DEFAULT_FORMATTERS,
"filters": self.DEFAULT_FILTERS,
"handlers": self.DEFAULT_CONSOLE_ONLY_HANDLERS,
"loggers": self.DEFAULT_CONSOLE_ONLY_LOGGERS,
"root": {
"level": "WARNING",
},
"incremental": False,
"disable_existing_loggers": True,
}
@property
def DEBUG_CONSOLE_CONFIG(self):
return {
"version": 1,
"handlers": {
"console_debug": {
"level": "DEBUG",
},
},
"incremental": True,
}
# Instantiate the helper
_LoggingHelper = LoggingHelper()
# And expose two methods from it
setup_logging = _LoggingHelper.setup_logging
adjust_logging = _LoggingHelper.adjust_logging
|