[PATCH 3 of 3] perfmanifest: allow and require passing in a rev

[Siddharth Agarwal]

# HG changeset patch
# User Siddharth Agarwal <sid0 at fb.com>
# Date 1378499729 25200
#      Fri Sep 06 13:35:29 2013 -0700
# Node ID b36dabbc3a3aab387df0a56e432e067bc1c14861
# Parent  9a82c7ceac3337c8aa7f106d51419b2051e9165e
perfmanifest: allow and require passing in a rev

Previously perfmanifest would only test tip.

diff --git a/contrib/perf.py b/contrib/perf.py
--- a/contrib/perf.py
+++ b/contrib/perf.py
@@ -171,10 +171,11 @@
         copies.pathcopies(ctx1, ctx2)
     timer(d)
 
- at command('perfmanifest')
-def perfmanifest(ui, repo):
+ at command('perfmanifest', [], 'REV')
+def perfmanifest(ui, repo, rev):
+    ctx = scmutil.revsingle(repo, rev, rev)
+    t = ctx.manifestnode()
     def d():
-        t = repo.manifest.tip()
         repo.manifest._mancache.clear()
         repo.manifest._cache = None
         repo.manifest.read(t)