[PATCH 02 of 19] basectx: add _manifestmatches method that is a duplicate of mfmatches

[Sean Farley]

# HG changeset patch
# User Sean Farley <sean.michael.farley at gmail.com>
# Date 1398304330 18000
#      Wed Apr 23 20:52:10 2014 -0500
# Node ID 4f3d70781a6031841ed191b360b7971af948977f
# Parent  ac2d57df1c2160e6da43d112b9eadfe688415472
basectx: add _manifestmatches method that is a duplicate of mfmatches

diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -61,10 +61,19 @@ class basectx(object):
 
     def __iter__(self):
         for f in sorted(self._manifest):
             yield f
 
+    def _manifestmatches(self, match, s):
+        mf = self.manifest().copy()
+        if match.always():
+            return mf
+        for fn in mf.keys():
+            if not match(fn):
+                del mf[fn]
+        return mf
+
     @propertycache
     def substate(self):
         return subrepo.state(self, self._repo.ui)
 
     def rev(self):