From 28421846074c4c60f9ff2b4124664a1305450671 Mon Sep 17 00:00:00 2001
From: Sylvain Thenault <sylvain.thenault@logilab.fr>
Date: Thu, 4 Dec 2008 18:00:49 +0100
Subject: backport init_log/set_log_methods

---
 ChangeLog      |  2 +-
 logging_ext.py | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 4b13555..78d2441 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,7 +7,7 @@ ChangeLog for logilab.common
     * tasksqueue: new module containing a class to handle prioritized tasks queue
     * proc: new module for process information / resource control
     * optik_ext: new time/bytes option types, using textutils conversion function
-	
+    * logging_ext: new set_log_methods / init_log utility functions	
 	
 2008-10-30  --  0.36.0
     * configuration:
diff --git a/logging_ext.py b/logging_ext.py
index b788c00..67b8342 100644
--- a/logging_ext.py
+++ b/logging_ext.py
@@ -8,10 +8,20 @@
 """
 __docformat__ = "restructuredtext en"
 
+import os
+import sys
 import logging
 
 from logilab.common.textutils import colorize_ansi
 
+
+def set_log_methods(cls, logger):
+    """bind standart logger's methods as methods on the class"""
+    cls.__logger = logger
+    for attr in ('lldebug', 'debug', 'info', 'warning', 'error', 'critical', 'exception'):
+        setattr(cls, attr, getattr(logger, attr))
+
+
 def xxx_cyan(record):
     if 'XXX' in record.message:
         return 'cyan'
@@ -70,3 +80,63 @@ def set_color_formatter(logger=None, **kw):
     fmt = ColorFormatter(format_msg, **kw)
     fmt.colorfilters.append(xxx_cyan)
     logger.handlers[0].setFormatter(fmt)
+
+
+LOG_FORMAT = '%(asctime)s - (%(name)s) %(levelname)s: %(message)s'
+LOG_DATE_FORMAT = '%Y-%m-%d %H:%M:%S'
+
+def init_log(debug=False, syslog=False, logthreshold=None, logfile=None,
+             logformat=LOG_FORMAT, logdateformat=LOG_DATE_FORMAT):
+    """init the log service"""
+    if os.environ.get('APYCOT_ROOT'):
+        logthreshold = logging.CRITICAL
+        # redirect logs to stdout to avoid apycot output parsing failure
+        handler = logging.StreamHandler(sys.stdout)
+    else:
+        if debug:
+            logthreshold = logging.DEBUG
+            handler = logging.StreamHandler()
+        elif logfile is None:
+            if syslog:
+                from logging import handlers
+                handler = handlers.SysLogHandler()
+            else:
+                handler = logging.StreamHandler()
+        else:
+            try:
+                handler = logging.FileHandler(logfile)
+            except IOError:
+                handler = logging.StreamHandler()
+        if logthreshold is None:
+            logthreshold = logging.ERROR
+        elif isinstance(logthreshold, basestring):
+            logthreshold = getattr(logging, THRESHOLD_MAP.get(logthreshold,
+                                                              logthreshold))
+    # configure the root logger
+    logger = logging.getLogger()
+    logger.setLevel(logthreshold)
+    # only addHandler and removeHandler method while I would like a
+    # setHandler method, so do it this way :$
+    logger.handlers = [handler]
+    isatty = hasattr(sys.__stdout__, 'isatty') and sys.__stdout__.isatty()
+    if debug and isatty:
+        fmt = ColorFormatter(logformat, logdateformat)
+        def col_fact(record):
+            if 'XXX' in record.message:
+                return 'cyan'
+            if 'kick' in record.message:
+                return 'red'
+        fmt.colorfilters.append(col_fact)
+    else:
+        fmt = logging.Formatter(logformat, logdateformat)
+    handler.setFormatter(fmt)
+    return handler
+
+# map logilab.common.logger thresholds to logging thresholds
+THRESHOLD_MAP = {'LOG_DEBUG':  'DEBUG',
+                 'LOG_INFO':   'INFO',
+                 'LOG_NOTICE': 'INFO',
+                 'LOG_WARN':   'WARNING',
+                 'LOG_ERR':    'ERROR',
+                 'LOG_CRIT':   'CRITICAL',
+                 }
-- 
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