# HG changeset patch
# User Matt Mackall <mpm@selenic.com>
# Date 2015-02-01 22:26:35
# Node ID ff070a53ee74a786aecc798780e1cf92eba06399
# Parent  751d1138ce353352274980c47e1efd52ca37484b

filectx: if we have a _descendantrev, use it to adjust linkrev

This lets us use _adjustlinkrev lazily.

diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -633,6 +633,11 @@ class basefilectx(object):
             return self._changeid
         elif '_changectx' in self.__dict__:
             return self._changectx.rev()
+        elif '_descendantrev' in self.__dict__:
+            # this file context was created from a revision with a known
+            # descendant, we can (lazily) correct for linkrev aliases
+            return self._adjustlinkrev(self._path, self._filelog,
+                                       self._filenode, self._descendantrev)
         else:
             return self._filelog.linkrev(self._filerev)