From e3859c2862b441059012e51cbd9e7eccc6b13470 Mon Sep 17 00:00:00 2001
From: mathieui <mathieui@mathieui.net>
Date: Sun, 13 Apr 2014 23:13:18 +0200
Subject: [PATCH] Do not load a plugin if its init() traceback

and show a somehow helpful error message in this case
---
 src/plugin.py         |  5 ++++-
 src/plugin_manager.py | 18 +++++++++++++-----
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/src/plugin.py b/src/plugin.py
index dfb0fff1..49f79ad5 100644
--- a/src/plugin.py
+++ b/src/plugin.py
@@ -10,6 +10,8 @@ from timed_events import TimedEvent, DelayedEvent
 import config
 import inspect
 import traceback
+import logging
+log = logging.getLogger(__name__)
 
 class PluginConfig(config.Config):
     """
@@ -81,7 +83,8 @@ class SafetyMetaclass(type):
     def __new__(meta, name, bases, class_dict):
         for k, v in class_dict.items():
             if inspect.isfunction(v):
-                class_dict[k] = SafetyMetaclass.safe_func(v)
+                if k != '__init__' and k != 'init':
+                    class_dict[k] = SafetyMetaclass.safe_func(v)
         return type.__new__(meta, name, bases, class_dict)
 
 class PluginWrap(object):
diff --git a/src/plugin_manager.py b/src/plugin_manager.py
index c58082e9..b3816939 100644
--- a/src/plugin_manager.py
+++ b/src/plugin_manager.py
@@ -92,10 +92,17 @@ class PluginManager(object):
         self.tab_keys[name] = {}
         self.tab_commands[name] = {}
         self.event_handlers[name] = []
-        self.plugins[name] = module.Plugin(self.plugin_api, self.core, self.plugins_conf_dir)
-
-        if notify:
-            self.core.information('Plugin %s loaded' % name, 'Info')
+        try:
+            self.plugins[name] = None
+            self.plugins[name] = module.Plugin(self.plugin_api, self.core, self.plugins_conf_dir)
+        except Exception as e:
+            log.error('Error while loading the plugin %s', name, exc_info=True)
+            if notify:
+                self.core.information('Unable to load the plugin %s: %s' % (name, e), 'Error')
+            self.unload(name, notify=False)
+        else:
+            if notify:
+                self.core.information('Plugin %s loaded' % name, 'Info')
 
     def unload(self, name, notify=True):
         if name in self.plugins:
@@ -115,7 +122,8 @@ class PluginManager(object):
                 for event_name, handler in self.event_handlers[name][:]:
                     self.del_event_handler(name, event_name, handler)
 
-                self.plugins[name].unload()
+                if self.plugins[name] is not None:
+                    self.plugins[name].unload()
                 del self.plugins[name]
                 del self.commands[name]
                 del self.keys[name]