# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 2017-06-17 00:49:32
# Node ID 04fa5520d167a2a2c485017b49463407cc6fdf85
# Parent  28a0e6a4e82453a7b5ff99310bf1a9e22906591e

perf: ensure HGRCPATH is exported on Windows

After dropping the garbage collector hack, `hg perfstartup` started yelling
about not being able to import the evolve extension, which I have in my user
config.  Launching `env` shows that an empty HGRCPATH isn't exported to the
environment.  Since `env` doesn't quote, I have no idea if the variable is
trimmed, but Mercurial doesn't complain when processing it.

diff --git a/contrib/perf.py b/contrib/perf.py
--- a/contrib/perf.py
+++ b/contrib/perf.py
@@ -661,7 +661,7 @@ def perfstartup(ui, repo, **opts):
         if os.name != 'nt':
             os.system("HGRCPATH= %s version -q > /dev/null" % cmd)
         else:
-            os.environ['HGRCPATH'] = ''
+            os.environ['HGRCPATH'] = ' '
             os.system("%s version -q > NUL" % cmd)
     timer(d)
     fm.end()