Mercurial > libervia-backend
annotate sat/core/log_config.py @ 3836:e183f1fbfa8d
doc (cli/pubsub): add doc for ``reference`` subcommand:
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| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Sun, 10 Jul 2022 16:15:09 +0200 |
| parents | 7550ae9cfbac |
| children | 760f563b1243 |
| rev | line source |
|---|---|
| 3028 | 1 #!/usr/bin/env python3 |
| 3137 | 2 |
| 991 | 3 |
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Renamed the project from "Salut à Toi" to "Libervia":
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4 # Libervia: an XMPP client |
| 3479 | 5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org) |
| 991 | 6 |
| 7 # This program is free software: you can redistribute it and/or modify | |
| 8 # it under the terms of the GNU Affero General Public License as published by | |
| 9 # the Free Software Foundation, either version 3 of the License, or | |
| 10 # (at your option) any later version. | |
| 11 | |
| 12 # This program is distributed in the hope that it will be useful, | |
| 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 # GNU Affero General Public License for more details. | |
| 16 | |
| 17 # You should have received a copy of the GNU Affero General Public License | |
| 18 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 | |
| 20 """High level logging functions""" | |
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21 # XXX: this module use standard logging module when possible, but as SàT can work in different cases where logging is not the best choice (twisted, pyjamas, etc), it is necessary to have a dedicated module. Additional feature like environment variables and colors are also managed. |
| 991 | 22 |
| 23 from sat.core.constants import Const as C | |
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24 from sat.core import log |
| 991 | 25 |
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26 |
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27 class TwistedLogger(log.Logger): |
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28 colors = True |
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29 force_colors = False |
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30 |
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31 def __init__(self, *args, **kwargs): |
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32 super().__init__(*args, **kwargs) |
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33 from twisted.logger import Logger |
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34 self.twisted_log = Logger() |
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35 |
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36 def out(self, message, level=None, **kwargs): |
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37 """Actually log the message |
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38 |
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39 @param message: formatted message |
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40 """ |
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41 if kwargs.pop('exc_info', False): |
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42 message = self.addTraceback(message) |
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43 self.twisted_log.emit( |
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44 level=self.level_map[level], |
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45 format=message, |
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46 sat_logged=True, |
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47 **kwargs, |
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48 ) |
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49 |
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50 |
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51 class ConfigureBasic(log.ConfigureBase): |
| 1942 | 52 def configureColors(self, colors, force_colors, levels_taints_dict): |
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53 super(ConfigureBasic, self).configureColors( |
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54 colors, force_colors, levels_taints_dict |
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55 ) |
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56 if colors: |
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57 import sys |
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58 |
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59 try: |
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60 isatty = sys.stdout.isatty() |
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61 except AttributeError: |
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62 isatty = False |
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63 # FIXME: isatty should be tested on each handler, not globaly |
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64 if (force_colors or isatty): |
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65 # we need colors |
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66 log.Logger.post_treat = lambda logger, level, message: self.ansiColors( |
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67 level, message |
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68 ) |
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69 elif force_colors: |
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70 raise ValueError("force_colors can't be used if colors is False") |
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71 |
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72 @staticmethod |
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73 def getProfile(): |
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74 """Try to find profile value using introspection""" |
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75 import inspect |
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76 |
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77 stack = inspect.stack() |
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78 current_path = stack[0][1] |
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79 for frame_data in stack[:-1]: |
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80 if frame_data[1] != current_path: |
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81 if ( |
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82 log.backend == C.LOG_BACKEND_STANDARD |
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83 and "/logging/__init__.py" in frame_data[1] |
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84 ): |
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85 continue |
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86 break |
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87 |
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88 frame = frame_data[0] |
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89 args = inspect.getargvalues(frame) |
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90 try: |
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91 profile = args.locals.get("profile") or args.locals["profile_key"] |
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92 except (TypeError, KeyError): |
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93 try: |
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94 try: |
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95 profile = args.locals["self"].profile |
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96 except AttributeError: |
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97 try: |
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98 profile = args.locals["self"].parent.profile |
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99 except AttributeError: |
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100 profile = args.locals[ |
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101 "self" |
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102 ].host.profile # used in quick_frontend for single profile configuration |
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103 except Exception: |
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104 # we can't find profile, we return an empty value |
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105 profile = "" |
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106 return profile |
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107 |
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108 |
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109 class ConfigureTwisted(ConfigureBasic): |
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110 LOGGER_CLASS = TwistedLogger |
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111 |
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112 def preTreatment(self): |
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113 from twisted import logger |
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114 global logger |
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115 self.level_map = { |
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116 C.LOG_LVL_DEBUG: logger.LogLevel.debug, |
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117 C.LOG_LVL_INFO: logger.LogLevel.info, |
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118 C.LOG_LVL_WARNING: logger.LogLevel.warn, |
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119 C.LOG_LVL_ERROR: logger.LogLevel.error, |
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120 C.LOG_LVL_CRITICAL: logger.LogLevel.critical, |
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121 } |
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122 self.LOGGER_CLASS.level_map = self.level_map |
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123 |
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124 def configureLevel(self, level): |
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125 self.level = self.level_map[level] |
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126 |
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127 def configureOutput(self, output): |
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128 import sys |
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129 from twisted.python import logfile |
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130 self.log_publisher = logger.LogPublisher() |
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131 |
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132 if output is None: |
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133 output = C.LOG_OPT_OUTPUT_SEP + C.LOG_OPT_OUTPUT_DEFAULT |
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134 self.manageOutputs(output) |
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135 |
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136 if C.LOG_OPT_OUTPUT_DEFAULT in log.handlers: |
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137 if self.backend_data is None: |
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138 raise ValueError( |
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139 "You must pass options as backend_data with Twisted backend" |
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140 ) |
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141 options = self.backend_data |
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142 log_file = logfile.LogFile.fromFullPath(options['logfile']) |
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143 self.log_publisher.addObserver( |
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144 logger.FileLogObserver(log_file, self.textFormatter)) |
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145 # we also want output to stdout if we are in debug or nodaemon mode |
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146 if options.get("nodaemon", False) or options.get("debug", False): |
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147 self.log_publisher.addObserver( |
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148 logger.FileLogObserver(sys.stdout, self.textFormatter)) |
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149 |
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150 if C.LOG_OPT_OUTPUT_FILE in log.handlers: |
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151 |
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152 for path in log.handlers[C.LOG_OPT_OUTPUT_FILE]: |
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153 log_file = ( |
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154 sys.stdout if path == "-" else logfile.LogFile.fromFullPath(path) |
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155 ) |
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156 self.log_publisher.addObserver( |
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157 logger.FileLogObserver(log_file, self.textFormatter)) |
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158 |
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159 if C.LOG_OPT_OUTPUT_MEMORY in log.handlers: |
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160 raise NotImplementedError( |
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161 "Memory observer is not implemented in Twisted backend" |
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162 ) |
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163 |
| 1942 | 164 def configureColors(self, colors, force_colors, levels_taints_dict): |
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165 super(ConfigureTwisted, self).configureColors( |
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166 colors, force_colors, levels_taints_dict |
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167 ) |
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168 self.LOGGER_CLASS.colors = colors |
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169 self.LOGGER_CLASS.force_colors = force_colors |
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170 if force_colors and not colors: |
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171 raise ValueError("colors must be True if force_colors is True") |
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172 |
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173 def postTreatment(self): |
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174 """Install twistedObserver which manage non SàT logs""" |
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175 # from twisted import logger |
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176 import sys |
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177 filtering_obs = logger.FilteringLogObserver( |
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178 observer=self.log_publisher, |
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179 predicates=[ |
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180 logger.LogLevelFilterPredicate(self.level), |
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181 ] |
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182 ) |
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183 logger.globalLogBeginner.beginLoggingTo([filtering_obs]) |
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184 |
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185 def textFormatter(self, event): |
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186 if event.get('sat_logged', False): |
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187 timestamp = ''.join([logger.formatTime(event.get("log_time", None)), " "]) |
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188 return f"{timestamp}{event.get('log_format', '')}\n" |
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189 else: |
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190 eventText = logger.eventAsText( |
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191 event, includeSystem=True) |
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192 if not eventText: |
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193 return None |
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194 return eventText.replace("\n", "\n\t") + "\n" |
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195 |
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196 |
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197 class ConfigureStandard(ConfigureBasic): |
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198 def __init__( |
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199 self, |
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200 level=None, |
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201 fmt=None, |
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202 output=None, |
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203 logger=None, |
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204 colors=False, |
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205 levels_taints_dict=None, |
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206 force_colors=False, |
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207 backend_data=None, |
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208 ): |
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209 if fmt is None: |
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210 fmt = C.LOG_OPT_FORMAT[1] |
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211 if output is None: |
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212 output = C.LOG_OPT_OUTPUT[1] |
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213 super(ConfigureStandard, self).__init__( |
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214 level, |
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215 fmt, |
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216 output, |
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217 logger, |
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218 colors, |
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219 levels_taints_dict, |
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220 force_colors, |
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221 backend_data, |
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222 ) |
| 991 | 223 |
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224 def preTreatment(self): |
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225 """We use logging methods directly, instead of using Logger""" |
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226 import logging |
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227 |
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228 log.getLogger = logging.getLogger |
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229 log.debug = logging.debug |
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230 log.info = logging.info |
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231 log.warning = logging.warning |
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232 log.error = logging.error |
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233 log.critical = logging.critical |
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234 |
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235 def configureLevel(self, level): |
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236 if level is None: |
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237 level = C.LOG_LVL_DEBUG |
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238 self.level = level |
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239 |
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240 def configureFormat(self, fmt): |
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241 super(ConfigureStandard, self).configureFormat(fmt) |
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242 import logging |
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243 |
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244 class SatFormatter(logging.Formatter): |
| 3028 | 245 """Formatter which manage SàT specificities""" |
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246 _format = fmt |
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247 _with_profile = "%(profile)s" in fmt |
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248 |
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249 def __init__(self, can_colors=False): |
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250 super(SatFormatter, self).__init__(self._format) |
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251 self.can_colors = can_colors |
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252 |
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253 def format(self, record): |
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254 if self._with_profile: |
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255 record.profile = ConfigureStandard.getProfile() |
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256 do_color = self.with_colors and (self.can_colors or self.force_colors) |
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257 if ConfigureStandard._color_location: |
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258 # we copy raw formatting strings for color_* |
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259 # as formatting is handled in ansiColors in this case |
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260 if do_color: |
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261 record.color_start = log.COLOR_START |
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262 record.color_end = log.COLOR_END |
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263 else: |
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264 record.color_start = record.color_end = "" |
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265 s = super(SatFormatter, self).format(record) |
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266 if do_color: |
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267 s = ConfigureStandard.ansiColors(record.levelname, s) |
| 3056 | 268 return s |
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269 |
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270 self.formatterClass = SatFormatter |
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271 |
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272 def configureOutput(self, output): |
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273 self.manageOutputs(output) |
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274 |
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275 def configureLogger(self, logger): |
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276 self.name_filter = log.FilterName(logger) if logger else None |
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277 |
| 1942 | 278 def configureColors(self, colors, force_colors, levels_taints_dict): |
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279 super(ConfigureStandard, self).configureColors( |
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280 colors, force_colors, levels_taints_dict |
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281 ) |
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282 self.formatterClass.with_colors = colors |
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283 self.formatterClass.force_colors = force_colors |
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284 if not colors and force_colors: |
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285 raise ValueError("force_colors can't be used if colors is False") |
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286 |
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287 def _addHandler(self, root_logger, hdlr, can_colors=False): |
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288 hdlr.setFormatter(self.formatterClass(can_colors)) |
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289 root_logger.addHandler(hdlr) |
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290 root_logger.setLevel(self.level) |
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291 if self.name_filter is not None: |
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292 hdlr.addFilter(self.name_filter) |
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293 |
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294 def postTreatment(self): |
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295 import logging |
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296 |
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297 root_logger = logging.getLogger() |
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298 if len(root_logger.handlers) == 0: |
| 3028 | 299 for handler, options in list(log.handlers.items()): |
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300 if handler == C.LOG_OPT_OUTPUT_DEFAULT: |
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301 hdlr = logging.StreamHandler() |
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302 try: |
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303 can_colors = hdlr.stream.isatty() |
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304 except AttributeError: |
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305 can_colors = False |
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306 self._addHandler(root_logger, hdlr, can_colors=can_colors) |
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307 elif handler == C.LOG_OPT_OUTPUT_MEMORY: |
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308 from logging.handlers import BufferingHandler |
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309 |
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310 class SatMemoryHandler(BufferingHandler): |
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311 def emit(self, record): |
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312 super(SatMemoryHandler, self).emit(self.format(record)) |
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313 |
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314 hdlr = SatMemoryHandler(options) |
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315 log.handlers[ |
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316 handler |
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317 ] = ( |
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318 hdlr |
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319 ) # we keep a reference to the handler to read the buffer later |
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320 self._addHandler(root_logger, hdlr, can_colors=False) |
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321 elif handler == C.LOG_OPT_OUTPUT_FILE: |
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322 import os.path |
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323 |
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324 for path in options: |
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325 hdlr = logging.FileHandler(os.path.expanduser(path)) |
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326 self._addHandler(root_logger, hdlr, can_colors=False) |
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327 else: |
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328 raise ValueError("Unknown handler type") |
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329 else: |
| 3028 | 330 root_logger.warning("Handlers already set on root logger") |
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331 |
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332 @staticmethod |
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333 def memoryGet(size=None): |
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334 """Return buffered logs |
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335 |
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336 @param size: number of logs to return |
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337 """ |
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338 mem_handler = log.handlers[C.LOG_OPT_OUTPUT_MEMORY] |
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339 return ( |
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340 log_msg for log_msg in mem_handler.buffer[size if size is None else -size :] |
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341 ) |
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342 |
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343 |
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344 log.configure_cls[C.LOG_BACKEND_BASIC] = ConfigureBasic |
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345 log.configure_cls[C.LOG_BACKEND_TWISTED] = ConfigureTwisted |
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346 log.configure_cls[C.LOG_BACKEND_STANDARD] = ConfigureStandard |
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347 |
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348 |
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349 def configure(backend, **options): |
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350 """Configure logging behaviour |
| 991 | 351 @param backend: can be: |
| 352 C.LOG_BACKEND_STANDARD: use standard logging module | |
| 353 C.LOG_BACKEND_TWISTED: use twisted logging module (with standard logging observer) | |
| 354 C.LOG_BACKEND_BASIC: use a basic print based logging | |
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355 C.LOG_BACKEND_CUSTOM: use a given Logger subclass |
| 991 | 356 """ |
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357 return log.configure(backend, **options) |
| 991 | 358 |
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359 |
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360 def _parseOptions(options): |
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361 """Parse string options as given in conf or environment variable, and return expected python value |
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362 |
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363 @param options (dict): options with (key: name, value: string value) |
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364 """ |
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365 COLORS = C.LOG_OPT_COLORS[0] |
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366 LEVEL = C.LOG_OPT_LEVEL[0] |
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367 |
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368 if COLORS in options: |
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369 if options[COLORS].lower() in ("1", "true"): |
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370 options[COLORS] = True |
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371 elif options[COLORS] == "force": |
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372 options[COLORS] = True |
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373 options["force_colors"] = True |
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374 else: |
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375 options[COLORS] = False |
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376 if LEVEL in options: |
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377 level = options[LEVEL].upper() |
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378 if level not in C.LOG_LEVELS: |
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379 level = C.LOG_LVL_INFO |
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380 options[LEVEL] = level |
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381 |
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382 |
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383 def satConfigure(backend=C.LOG_BACKEND_STANDARD, const=None, backend_data=None): |
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384 """Configure logging system for SàT, can be used by frontends |
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385 |
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386 logs conf is read in SàT conf, then in environment variables. It must be done before Memory init |
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387 @param backend: backend to use, it can be: |
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388 - C.LOG_BACKEND_BASIC: print based backend |
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389 - C.LOG_BACKEND_TWISTED: Twisted logging backend |
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390 - C.LOG_BACKEND_STANDARD: standard logging backend |
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391 @param const: Const class to use instead of sat.core.constants.Const (mainly used to change default values) |
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392 """ |
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393 if const is not None: |
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394 global C |
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395 C = const |
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396 log.C = const |
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397 from sat.tools import config |
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398 import os |
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399 |
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400 log_conf = {} |
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401 sat_conf = config.parseMainConf() |
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402 for opt_name, opt_default in C.LOG_OPTIONS(): |
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403 try: |
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404 log_conf[opt_name] = os.environ[ |
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405 "".join((C.ENV_PREFIX, C.LOG_OPT_PREFIX.upper(), opt_name.upper())) |
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406 ] |
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407 except KeyError: |
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408 log_conf[opt_name] = config.getConfig( |
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409 sat_conf, C.LOG_OPT_SECTION, C.LOG_OPT_PREFIX + opt_name, opt_default |
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410 ) |
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411 |
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412 _parseOptions(log_conf) |
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413 configure(backend, backend_data=backend_data, **log_conf) |