Add .plugin member to PluginValidationError to access failing plugin

Author: ids1024

pluggy/manager.py

@@ -6,6 +6,10 @@
 class PluginValidationError(Exception):
     """ plugin failed validation. """
 
+    def __init__(self, plugin, message):
+        self.plugin = plugin
+        super(Exception, self).__init__(message)
+
 
 class PluginManager(object):
     """ Core Pluginmanager class which manages registration
@@ -178,13 +182,15 @@ def get_name(self, plugin):
     def _verify_hook(self, hook, hookimpl):
         if hook.is_historic() and hookimpl.hookwrapper:
             raise PluginValidationError(
+                hookimpl.plugin,
                 "Plugin %r\nhook %r\nhistoric incompatible to hookwrapper" %
                 (hookimpl.plugin_name, hook.name))
 
         # positional arg checking
         notinspec = set(hookimpl.argnames) - set(hook.argnames)
         if notinspec:
             raise PluginValidationError(
+                hookimpl.plugin,
                 "Plugin %r for hook %r\nhookimpl definition: %s\n"
                 "Argument(s) %s are declared in the hookimpl but "
                 "can not be found in the hookspec" %
@@ -202,6 +208,7 @@ def check_pending(self):
                     for hookimpl in (hook._wrappers + hook._nonwrappers):
                         if not hookimpl.optionalhook:
                             raise PluginValidationError(
+                                hookimpl.plugin,
                                 "unknown hook %r in plugin %r" %
                                 (name, hookimpl.plugin))