#
#
# patch "tracvc/mtn/backend.py"
#  from [35c9ba8f6a4795f433d9b8588c1945f41ee9e91e]
#    to [59a61d9bd8479507a3c52ef03fe8cf219edb6ef6]
#
============================================================
--- tracvc/mtn/backend.py	35c9ba8f6a4795f433d9b8588c1945f41ee9e91e
+++ tracvc/mtn/backend.py	59a61d9bd8479507a3c52ef03fe8cf219edb6ef6
@@ -193,7 +193,7 @@ class MonotoneRepository(Repository):
     """
     Represents a Monotone repository.
     """
-
+    
     def __init__(self, path, log, binary, cachespec, revpropspec = None):
         Repository.__init__(self, 'mtn:%s' % path, None, log)
         self.mtn = MTN(path, log, binary, cachespec)
@@ -238,6 +238,20 @@ class MonotoneRepository(Repository):
         rev = self.normalize_rev(rev) or self.get_youngest_rev()
         return MonotoneNode(self.mtn, rev, path)
 
+    def sync(self, feedback=None):
+        """Perform a sync of the repository cache, if relevant.
+        
+        If given, `feedback` must be a callback taking a `rev` parameter.
+        The backend will call this function for each `rev` it decided to
+        synchronize, once the synchronization changes are committed to the 
+        cache.
+        """
+        pass
+
+    def sync_changeset(self, rev):
+        """Resync the repository cache for the given `rev`, if relevant."""
+        pass
+
     def get_oldest_rev(self):
         """
         Return the oldest revision stored in the repository.