WIP: Add name parameter to PluginManager.load_setuptools_entrypoints

Related to pytest-dev/pytest#4727

Author: nicoddemus

pluggy/manager.py

@@ -251,7 +251,7 @@ def check_pending(self):
                                 % (name, hookimpl.plugin),
                             )
 
-    def load_setuptools_entrypoints(self, entrypoint_name):
+    def load_setuptools_entrypoints(self, entrypoint_name, name=None):
         """ Load modules from querying the specified setuptools entrypoint name.
         Return the number of loaded plugins. """
         from pkg_resources import (
@@ -260,7 +260,7 @@ def load_setuptools_entrypoints(self, entrypoint_name):
             VersionConflict,
         )
 
-        for ep in iter_entry_points(entrypoint_name):
+        for ep in iter_entry_points(entrypoint_name, name=name):
             # is the plugin registered or blocked?
             if self.get_plugin(ep.name) or self.is_blocked(ep.name):
                 continue