From 7928057108150056524de980a5c3c63032215494 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Mon, 17 Oct 2016 12:34:09 +0900
Subject: [PATCH] Make Neovim installer synchronous during startup

Close #104

This allows for `nvim +PlugUpdate +qa` without Python.
---
 plug.vim | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/plug.vim b/plug.vim
index 583884d..e039b91 100644
--- a/plug.vim
+++ b/plug.vim
@@ -948,7 +948,7 @@ function! s:update_impl(pull, force, args) abort
     call s:warn('echom', '[vim-plug] Update Neovim for parallel installer')
   endif
 
-  let python = (has('python') || has('python3')) && (!s:nvim || has('vim_starting'))
+  let python = (has('python') || has('python3')) && !s:nvim
   let ruby = has('ruby') && !s:nvim && (v:version >= 703 || v:version == 702 && has('patch374')) && !(s:is_win && has('gui_running')) && s:check_ruby()
 
   let s:update = {
@@ -1014,6 +1014,12 @@ function! s:update_impl(pull, force, args) abort
     endtry
   else
     call s:update_vim()
+    while s:nvim && has('vim_starting')
+      sleep 100m
+      if s:update.fin
+        break
+      endif
+    endwhile
   endif
 endfunction
 
@@ -1218,8 +1224,8 @@ function! s:tick()
 while 1 " Without TCO, Vim stack is bound to explode
   if empty(s:update.todo)
     if empty(s:jobs) && !s:update.fin
-      let s:update.fin = 1
       call s:update_finish()
+      let s:update.fin = 1
     endif
     return
   endif