From e8f0f4830b6c9c198707fbd9cf90944ad46c58b8 Mon Sep 17 00:00:00 2001
From: Lin Dong <ldong@users.noreply.github.com>
Date: Sun, 26 Jul 2015 23:04:24 -0700
Subject: [PATCH] Updated vimrc

Changed to create `~/.vim/backups` directory for `persistent_undo` only once.
---
 vimrc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vimrc b/vimrc
index 5927a8b..27bbd79 100644
--- a/vimrc
+++ b/vimrc
@@ -49,7 +49,7 @@ set nowb
 " ================ Persistent Undo ==================
 " Keep undo history across sessions, by storing in file.
 " Only works all the time.
-if has('persistent_undo')
+if has('persistent_undo') && !isdirectory(expand('~').'/.vim/backups')
   silent !mkdir ~/.vim/backups > /dev/null 2>&1
   set undodir=~/.vim/backups
   set undofile