# HG changeset patch
# User Phil Cohen <phillco@fb.com>
# Date 2017-10-13 19:34:22
# Node ID 0c812885586b3d97dedb4c54d80586e2993eba42
# Parent  f21eecc64ace88f2eeeaadabdd99e8829f45758f

context: add overlayfilectx.cmp()

Differential Revision: https://phab.mercurial-scm.org/D1058

diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -2098,6 +2098,9 @@ class overlayworkingfilectx(workingfilec
         self._parent = parent
         self._path = path
 
+    def cmp(self, fctx):
+        return self.data() != fctx.data()
+
     def ctx(self):
         return self._parent