Merge pull request #30 from RonnyPfannschmidt/fix-17-detect-module

fix #17 by considering only routines

CHANGELOG

@@ -4,6 +4,10 @@
 - fix bug where callbacks for historic hooks would not be called for
   already registered plugins.  Thanks Simon Gmizelj for the PR
   and holger krekel for further fixes.
+- fix #17 by considering only actual functions for hooks
+  this removes the ability to register arbitrary callable objects
+  which at first glance is a reasonable simplification,
+  thanks RonnyPfannschmidt for report and pr.
 
 0.4.0
 -----

pluggy.py

@@ -375,6 +375,8 @@ def register(self, plugin, name=None):
 
     def parse_hookimpl_opts(self, plugin, name):
         method = getattr(plugin, name)
+        if not inspect.isroutine(method):
+            return
         try:
             res = getattr(method, self.project_name + "_impl", None)
         except Exception:

testing/test_pluggy.py

@@ -656,6 +656,15 @@ def hello_myhook(self, arg1):
         results = pm.hook.hello_myhook(arg1=17)
         assert results == [18, 18]
 
+    def test_prefix_hookimpl_dontmatch_module(self):
+        pm = PluginManager(hookspec.project_name, "hello_")
+
+        class BadPlugin:
+            hello_module = __import__('email')
+
+        pm.register(BadPlugin())
+        pm.check_pending()
+
 
 def test_parse_hookimpl_override():
     class MyPluginManager(PluginManager):