From 4e8d08f221ae2af1807be986a1bb1acf322d18d7 Mon Sep 17 00:00:00 2001
From: Fabio Erculiani <lxnay@sabayonlinux.org>
Date: Sat, 27 Jun 2009 18:58:42 +0200
Subject: [PATCH] [entropy.core] improve plugins support, add post_setup method

It is now possible to run post SystemSettings setup stuff in
SystemSettingsPlugin instances. This could be handy to hook
code that needs SystemSettings complete metadata itself.
---
 libraries/entropy/core.py | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/libraries/entropy/core.py b/libraries/entropy/core.py
index dd5bbe092..10c13e714 100644
--- a/libraries/entropy/core.py
+++ b/libraries/entropy/core.py
@@ -182,6 +182,20 @@ class SystemSettingsPlugin:
                 system_settings_instance[plugin_id] = {}
             system_settings_instance[plugin_id][parser_id] = data
 
+    def post_setup(self, system_settings_instance):
+        """
+        This method is called by SystemSettings instance
+        after having built all the SystemSettings metadata.
+        You can reimplement this and hook your refinement code
+        into this method.
+
+        @param system_settings_instance: SystemSettings instance
+        @type system_settings_instance: SystemSettings instance
+        @return: None
+        @rtype: None
+        """
+        pass
+
 class SystemSettings(Singleton):
 
     """
@@ -378,16 +392,24 @@ class SystemSettings(Singleton):
         @rtype: None
         """
 
+        def enforce_persistent():
+            # merge persistent settings back
+            self.__data.update(self.__persistent_settings)
+            # restore backed-up settings
+            self.__data.update(self.__persistent_settings['backed_up'].copy())
+
         self.__parse()
+        enforce_persistent()
 
         # plugins support
         for plugin_id in sorted(self.__plugins):
             self.__plugins[plugin_id].parse(self)
 
-        # merge persistent settings back
-        self.__data.update(self.__persistent_settings)
-        # restore backed-up settings
-        self.__data.update(self.__persistent_settings['backed_up'].copy())
+        enforce_persistent()
+
+        # run post-SystemSettings setup, plugins hook
+        for plugin_id in sorted(self.__plugins):
+            self.__plugins[plugin_id].post_setup(self)
 
     def __setitem__(self, mykey, myvalue):
         """