[PATCH 2 of 2] devel-warn: issue a warning for old style revsets

[Pierre-Yves David]

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david at fb.com>
# Date 1434737831 25200
#      Fri Jun 19 11:17:11 2015 -0700
# Node ID 13887cc1647ef5a2f39f3ae447fba4961499fa98
# Parent  a51f19e7f84edf50d1d751d8f55466bb10f4ba05
devel-warn: issue a warning for old style revsets

We have move to smartset class more than a year ago, we now have the tool to
aggressively nudge developer into upgrading their extensions.

diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -319,10 +319,14 @@ def getset(repo, subset, x):
     if not x:
         raise error.ParseError(_("missing argument"))
     s = methods[x[0]](repo, subset, *x[1:])
     if util.safehasattr(s, 'isascending'):
         return s
+    if (repo.ui.configbool('devel', 'all-warnings')
+            or repo.ui.configbool('devel', 'old-revset')):
+        repo.ui.develwarn('revset use list instead of smartset, '
+                          '(upgrade your code)')
     return baseset(s)
 
 def _getrevsource(repo, r):
     extra = repo[r].extra()
     for label in ('source', 'transplant_source', 'rebase_source'):