supybotconfig - fix __init__ order

Ignore-this: 684574bdf546a62ee97c3fbd8ac5f637
- This fixes a problem where writer_map was not properly being read
  from the supybot config system.  It was caused by __init__ in the
  Config class not being able to get data from the supybot config
  proxy.
- This patch rebinds __init__ to use the supybot config proxy
  __getattr__ scheme.
- As part of fixing this, I had to add code to rebind
  descriptors/properties to use the config proxy, too.

darcs-hash:20101210055924-82ea9-e10c282c4803cb987f6dd423838b474b686d9c50.gz

MeetBot/supybotconfig.py

@@ -77,15 +77,20 @@ class SupybotConfigProxy(object):
     def __init__(self, *args, **kwargs):
         """Do the regular default configuration, and sta"""
         OriginalConfig = self.__OriginalConfig
-        self.__C = OriginalConfig(*args, **kwargs)
+        self.__C = OriginalConfig.__new__(OriginalConfig, *args, **kwargs)
+        # We need to call the __init__ *after* we have rebound the
+        # method to get variables from the config proxy.
+        old_init = self.__C.__init__
+        new_init = types.MethodType(old_init.im_func, self, old_init.im_class)
+        new_init(*args, **kwargs)
     
     def __getattr__(self, attrname):
         """Try to get the value from the supybot registry.  If it's in
         the registry, return it.  If it's not, then proxy it to th.
         """
         if attrname in settable_attributes:
-            value = self.__C.M._registryValue(attrname,
-                                              channel=self.__C.M.channel)
+            M = self.M
+            value = M._registryValue(attrname, channel=M.channel)
             if not isinstance(value, (str, unicode)):
                 return value
             # '.' is used to mean "this is not set, use the default
@@ -93,6 +98,19 @@ class SupybotConfigProxy(object):
             if value != '.':
                 value = value.replace('\\n', '\n')
                 return value
+        # If the attribute is a _property_, we need to rebind the
+        # "fget" method to the proxy class.
+        # See http://docs.python.org/library/functions.html#property
+        #     http://docs.python.org/reference/datamodel.html#descriptors
+        C = self.__C
+        # is this a class attribute AND does it have a fget ?
+        if hasattr(C.__class__, attrname) and \
+               hasattr(getattr(C.__class__, attrname), 'fget'):
+            # Get the 'fget' descriptor, rebind it to self, return its
+            # value.
+            fget = getattr(C.__class__, attrname).fget
+            fget = types.MethodType(fget, self, C.__class__)
+            return fget()
         # We don't have this value in the registry.  So, proxy it to
         # the normal config object.  This is also the path that all
         # functions take.

ircmeeting/meeting.py

@@ -460,8 +460,6 @@ class Meeting(MeetingCommands, object):
                  setTopic=None, sendReply=None, getRegistryValue=None,
                  safeMode=False, channelNicks=None,
                  extraConfig={}, network='nonetwork'):
-        self.config = Config(self, writeRawLog=writeRawLog, safeMode=safeMode,
-                            extraConfig=extraConfig)
         if getRegistryValue is not None:
             self._registryValue = getRegistryValue
         if sendReply is not None:
@@ -472,6 +470,8 @@ class Meeting(MeetingCommands, object):
         self.channel = channel
         self.network = network
         self.currenttopic = ""
+        self.config = Config(self, writeRawLog=writeRawLog, safeMode=safeMode,
+                            extraConfig=extraConfig)
         if oldtopic:
             self.oldtopic = self.config.dec(oldtopic)
         else: