Remove classes from plugins and use decorators instead

jedi/evaluate/__init__.py

@@ -121,7 +121,7 @@ class Evaluator(object):
 
         # Plugin API
         from jedi.plugins import plugin_manager
-        plugin_callbacks = plugin_manager.get_callbacks(self)
+        plugin_callbacks = plugin_manager.get_callbacks()
         self.execute = plugin_callbacks.decorate('execute', callback=_execute)
         self._import_module = partial(
             plugin_callbacks.decorate(

jedi/plugins/__init__.py

@@ -1,5 +1,5 @@
-from jedi.plugins.stdlib import StdlibPlugin
-from jedi.plugins.flask import FlaskPlugin
+from jedi.plugins import stdlib
+from jedi.plugins import flask
 
 
 class _PluginManager(object):
@@ -12,12 +12,12 @@ class _PluginManager(object):
         """
         self._registered_plugins.append(plugin_class)
 
-    def _build_chain(self, evaluator):
+    def _build_chain(self):
         for plugin_class in self._registered_plugin_classes:
-            yield plugin_class(evaluator)
+            yield plugin_class
 
-    def get_callbacks(self, evaluator):
-        return _PluginCallbacks(self._build_chain(evaluator))
+    def get_callbacks(self):
+        return _PluginCallbacks(self._build_chain())
 
 
 class _PluginCallbacks(object):
@@ -27,11 +27,13 @@ class _PluginCallbacks(object):
     def decorate(self, name, callback):
         for plugin in reversed(self._plugins):
             # Need to reverse so the first plugin is run first.
-            callback = getattr(plugin, name)(callback)
+            try:
+                func = getattr(plugin, name)
+            except AttributeError:
+                pass
+            else:
+                callback = func(callback)
         return callback
 
 
-plugin_manager = _PluginManager([
-    StdlibPlugin,
-    FlaskPlugin,
-])
+plugin_manager = _PluginManager([stdlib, flask])

jedi/plugins/base.py

@@ -1,21 +0,0 @@
-class BasePlugin(object):
-    """
-    Plugins are created each time an evaluator is created.
-    """
-    def __init__(self, evaluator):
-        # In __init__ you can do some caching.
-        self._evaluator = evaluator
-
-    def execute(self, callback):
-        """
-        Decorates the execute(context, arguments) function.
-        """
-        return callback
-
-    def import_module(self, callback):
-        """
-        Decorates the
-        import_module(evaluator, import_path, sys_path, add_error_callback)
-        function.
-        """
-        return callback

jedi/plugins/flask.py

@@ -1,8 +1,4 @@
-from jedi.plugins.base import BasePlugin
-
-
-class FlaskPlugin(BasePlugin):
-    def import_module(self, callback):
+def import_module(callback):
     """
     Handle "magic" Flask extension imports:
     ``flask.ext.foo`` is really ``flask_foo`` or ``flaskext.foo``.

jedi/plugins/stdlib.py

@@ -12,7 +12,6 @@ compiled module that returns the types for C-builtins.
 import parso
 
 from jedi._compatibility import force_unicode
-from jedi.plugins.base import BasePlugin
 from jedi import debug
 from jedi.evaluate.helpers import get_str_or_none
 from jedi.evaluate.arguments import ValuesArguments, \
@@ -98,15 +97,14 @@ _NAMEDTUPLE_FIELD_TEMPLATE = '''\
 '''
 
 
-class StdlibPlugin(BasePlugin):
-    def execute(self, callback):
+def execute(callback):
     def wrapper(context, arguments):
         try:
             obj_name = context.name.string_name
         except AttributeError:
             pass
         else:
-                if context.parent_context == self._evaluator.builtins_module:
+            if context.parent_context == context.evaluator.builtins_module:
                 module_name = 'builtins'
             elif context.parent_context is not None and context.parent_context.is_module():
                 module_name = context.parent_context.py__name__()