# HG changeset patch
# User Yuya Nishihara <yuya@tcha.org>
# Date 1423148807 -32400
# Node ID 4fa72a09c73df58cc94e7094082ebba8adf8c7f0
# Parent  eb1c9700d19d7391af033d4c7f30ebbacfaa55a6
graphlog: remove useless check for empty repo when --follow is specified

This prepares for extracting common part from getgraphlogrevs() and
getlogrevs(). getlogrevs() does not handle empty repo specially.

When it was added at d74099ac2ac1, revs were build by old-style query, '.:0'.
So I think the purpose of "len(repo) > 0" was to handle the case of . = null.
Currently it isn't necessary for 'reverse(:.)', and it does not work if repo
is not empty but p1 is null.

  $ hg up null
  $ hg glog --follow -T '{rev}:{node|short}\n'
  o  0:0a04b987be5a

The subsequent patch will fix this problem, so drops the wrong version for now.

diff -r eb1c9700d19d -r 4fa72a09c73d mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Thu Feb 05 23:49:18 2015 +0900
+++ b/mercurial/cmdutil.py	Fri Feb 06 00:06:47 2015 +0900
@@ -1837,7 +1837,7 @@
     if opts.get('rev'):
         revs = scmutil.revrange(repo, opts['rev'])
     else:
-        if follow and len(repo) > 0:
+        if follow:
             revs = repo.revs('reverse(:.)')
         else:
             revs = revset.spanset(repo)