diff -r 7034365089bf -r 87e8440964a0 mercurial/scmutil.py
--- a/mercurial/scmutil.py	Fri Jul 06 18:45:26 2012 +0900
+++ b/mercurial/scmutil.py	Fri Jul 06 18:45:27 2012 +0900
@@ -196,7 +196,9 @@
     This class is used to hide the details of COW semantics and
     remote file access from higher level code.
     '''
-    def __init__(self, base, audit=True):
+    def __init__(self, base, audit=True, expand=False):
+        if expand:
+            base = os.path.realpath(util.expandpath(base))
         self.base = base
         self._audit = audit
         if audit: