# HG changeset patch
# User Jeff Hammel <jhammel@mozilla.com>
# Date 1306815182 25200
# Node ID 8179c05d7692469c9f578bd9701a6f5e78278b16
# Parent  a545438386869a1c780225b88392732a7766528b
note ABC

diff -r a54543838686 -r 8179c05d7692 buttercup/source.py
--- a/buttercup/source.py	Mon May 30 21:11:19 2011 -0700
+++ b/buttercup/source.py	Mon May 30 21:13:02 2011 -0700
@@ -18,6 +18,9 @@
     def directory(self):
         return os.path.join(self.srcdir, self.directory_name(self.uri))
 
+    def update(self):
+        raise NotImplementedError("`Source` is an abstract base class")
+
 class HgSource(Source):
     """mercurial source"""