# HG changeset patch
# User Matt Mackall <mpm@selenic.com>
# Date 2008-11-14 20:12:43
# Node ID 374a6b3ac623b060a4a840030ba62b9afc3c44a5
# Parent  fc06bd17c985cd5433ca8e28839b6217a22b8a2c

lookup: fast-paths for int and 'tip'

diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -437,10 +437,14 @@ class localrepository(repo.repository):
             partial[b] = c.node()
 
     def lookup(self, key):
-        if key == '.':
+        if isinstance(key, int):
+            return self.changelog.node(key)
+        elif key == '.':
             return self.dirstate.parents()[0]
         elif key == 'null':
             return nullid
+        elif key == 'tip':
+            return self.changelog.tip()
         n = self.changelog._match(key)
         if n:
             return n