For automatic unregistration, key plugin classes by the module fullpath.

Can't key them by the module itself because once the module is loaded, classes may already be registered.

Also, checkTimestamps now returns the correct answer.

src/mcedit2/plugins.py

@@ -85,7 +85,7 @@ class PluginRef(object):
             modtime = os.stat(filename).st_mtime
             timestamps[filename] = modtime
 
-        changed = timestamps == self.timestamps
+        changed = timestamps != self.timestamps
         self.timestamps = timestamps
         return changed
 
@@ -109,8 +109,13 @@ class PluginRef(object):
         try:
             io, pathname, description = self.findModule()
             log.info("Trying to load plugin from %s", self.filename)
+            global _currentPluginPathname
+            _currentPluginPathname = pathname
+
             self.pluginModule = imp.load_module(basename, io, pathname, description)
-            registerModule(self.filename, self.pluginModule)
+            registerModule(self.fullpath, self.pluginModule)
+            _currentPluginPathname = None
+
             if hasattr(self.pluginModule, 'displayName'):
                 self._displayName = self.pluginModule.displayName
 
@@ -128,7 +133,7 @@ class PluginRef(object):
         if self.pluginModule is None:
             return
         try:
-            unregisterModule(self.pluginModule)
+            unregisterModule(self.fullpath, self.pluginModule)
             sys.modules.remove(self.pluginModule)
         except Exception as e:
             self.unloadError = traceback.format_exc()
@@ -150,7 +155,11 @@ class PluginRef(object):
         return os.path.splitext(os.path.basename(self.filename))[0]
 
     def exists(self):
-        return os.path.exists(self.filename)
+        return os.path.exists(self.fullpath)
+
+    @property
+    def fullpath(self):
+        return os.path.join(self.pluginsDir, self.filename)
 
     @property
     def enabled(self):
@@ -216,43 +225,30 @@ def detectPlugin(filename, pluginsDir):
 # --- Plugin registration ---
 
 _loadedModules = {}
-_pluginClassesByModule = defaultdict(list)
+_pluginClassesByPathname = defaultdict(list)
-_currentPluginModule = None
+_currentPluginPathname = None
 
 def registerModule(filename, pluginModule):
-    global _currentPluginModule
     if hasattr(pluginModule, "register"):
-        _currentPluginModule = pluginModule
         pluginModule.register()
-        _currentPluginModule = None
 
     _loadedModules[filename] = pluginModule
     pluginModule.__FOUND_FILENAME__ = filename
 
-def unregisterModule(pluginModule):
+def unregisterModule(filename, pluginModule):
     if hasattr(pluginModule, "unregister"):
         pluginModule.unregister()
 
-    classes = _pluginClassesByModule.pop(pluginModule)
+    classes = _pluginClassesByPathname.pop(filename)
     if classes:
         for cls in classes:
             _unregisterClass(cls)
 
     _loadedModules.pop(pluginModule.__FOUND_FILENAME__)
 
-def reloadModule(filename):
-    module = _loadedModules.get(filename)
-    if module:
-        filename = module.__FOUND_FILENAME__
-        unregisterModule(module)
-
-        reload(module)
-        registerModule(filename, module)
-    # else loadModule(filename)?
-
 
 def _registerClass(cls):
-    _pluginClassesByModule[_currentPluginModule].append(cls)
+    _pluginClassesByPathname[_currentPluginPathname].append(cls)
 
 
 def _unregisterClass(cls):