From 5695fb84743ace811c03a5cd39ca7a825fa9caf7 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Sat, 23 Jul 2016 10:13:25 +0900
Subject: [PATCH] Do not proceed if $GIT_DIR or $GIT_WORK_TREE is found

Close #506
---
 plug.vim | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/plug.vim b/plug.vim
index 866db9c..ff1827b 100644
--- a/plug.vim
+++ b/plug.vim
@@ -705,6 +705,12 @@ function! s:prepare(...)
     throw 'Invalid current working directory. Cannot proceed.'
   endif
 
+  for evar in ['$GIT_DIR', '$GIT_WORK_TREE']
+    if exists(evar)
+      throw evar.' detected. Cannot proceed.'
+    endif
+  endfor
+
   call s:job_abort()
   if s:switch_in()
     normal q