plugin: reduce code duplication

Factor out supported directive checking, drop redundant checking in
handle().

1 files changed, 3 insertions, 1 deletions

diff --git a/dotbot/plugin.py b/dotbot/plugin.py
index 56d4da8..5e2c923 100644
--- a/dotbot/plugin.py
+++ b/dotbot/plugin.py
@@ -6,6 +6,8 @@ class Plugin(object):
     Abstract base class for commands that process directives.
     '''
 
+    _directive = None
+
     def __init__(self, context):
         self._context = context
         self._log = Messenger()
@@ -14,7 +16,7 @@ class Plugin(object):
         '''
         Returns true if the Plugin can handle the directive.
         '''
-        raise NotImplementedError
+        return directive == self._directive
 
     def handle(self, directive, data):
         '''