From cbaf4f30881025d8243ad3c4ba99c1a885c46c03 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Sun, 15 Mar 2015 13:04:47 +0900
Subject: [PATCH] Allow using Ruby/Python for PlugUpgrade on Windows (#192)

---
 plug.vim | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/plug.vim b/plug.vim
index e625951..7ec5945 100644
--- a/plug.vim
+++ b/plug.vim
@@ -1749,9 +1749,9 @@ function! s:upgrade()
       if v:shell_error
         throw get(s:lines(output), -1, v:shell_error)
       endif
-    elseif s:ruby
+    elseif has('ruby')
       call s:upgrade_using_ruby(new)
-    elseif s:py2
+    elseif has('python')
       call s:upgrade_using_python(new)
     else
       return s:err('Missing: curl executable, ruby support or python support')