[PATCH 1 of 2] subrepo: check that subrepo paths are not existing files

[Jordi Gutiérrez Hermoso]

# HG changeset patch
# User Jordi Gutiérrez Hermoso <jordigh at octave.org>
# Date 1410279390 14400
#      Tue Sep 09 12:16:30 2014 -0400
# Node ID 7611a7833657301d9a881095828d5e75558d82f9
# Parent  897041f6b025778193c6da5b9795da09a91c866e
subrepo: check that subrepo paths are not existing files

This check has to happen early one, as the .hgsub file is being
parsed. This should provide an early error message.

diff --git a/mercurial/subrepo.py b/mercurial/subrepo.py
--- a/mercurial/subrepo.py
+++ b/mercurial/subrepo.py
@@ -126,6 +126,10 @@ def state(ctx, ui):
 
     state = {}
     for path, src in p[''].items():
+
+        if os.path.isfile(path):
+            raise util.Abort(_('subrepository path is an existing file: %s')
+                             % path)
         kind = 'hg'
         if src.startswith('['):
             if ']' not in src: