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# Changes between Version 2 and Version 3 of TracLogging

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Timestamp:
06/05/14 14:37:16 (9 years ago)
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 v2 [[TracGuideToc]] Trac supports logging of system messages using the standard [http://docs.python.org/lib/module-logging.html logging module] that comes with Python. Trac supports logging of system messages using the standard [http://docs.python.org/library/logging.html logging module] that comes with Python. Logging is configured in the [logging] section in [wiki:TracIni#logging-section trac.ini]. '''none'':: Suppress all log messages. '''file''':: Log messages to a file, specified with the log_file option in [wiki:TracIni#logging-section trac.ini]. '''file''':: Log messages to a file, specified with the log_file option in [wiki:TracIni#logging-section trac.ini]. Relative paths in log_file are resolved relative to the log directory of the environment. '''stderr''':: Output all log entries to console ([wiki:TracStandalone tracd] only). '''syslog''':: (UNIX) Send all log messages to the local syslogd via named pipe /dev/log. By default, syslog will write them to the file /var/log/messages. == Log Format == Starting with Trac 0.10.4 (see [trac:#2844 #2844]), it is possible to set the output format for log entries. This can be done through the log_format option in [wiki:TracIni#logging-section trac.ini]. The format is a string which can contain any of the [http://docs.python.org/lib/node422.html Python logging Formatter variables]. Additonally, the following Trac-specific variables can be used: Starting with Trac 0.10.4 (see [trac:#2844 #2844]), it is possible to set the output format for log entries. This can be done through the log_format option in [wiki:TracIni#logging-section trac.ini]. The format is a string which can contain any of the [http://docs.python.org/library/logging.html#logrecord-attributes Python logging Formatter variables]. Additonally, the following Trac-specific variables can be used: '''$(basename)s''':: The last path component of the current environment. '''$(path)s''':: The absolute path for the current environment.