From 71cc4c5037090fbfde5e1ecc42767afbed91d5b2 Mon Sep 17 00:00:00 2001
From: Jan Edmund Lazo <janedmundlazo@hotmail.com>
Date: Sun, 20 Aug 2017 22:42:45 -0400
Subject: [PATCH] Run preview script in batchfile for Windows

Bypasses the following issues in Windows:
1. Neovim does not support 8.3 filenames
   ie. fnamemodify(path, ':8')
2. fzf binary cannot parse output of fzf#shellescape
   It assumes that preview command is run in sh, not cmd.exe
---
 autoload/fzf/vim.vim | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/autoload/fzf/vim.vim b/autoload/fzf/vim.vim
index cc6f4d1..7abd64f 100644
--- a/autoload/fzf/vim.vim
+++ b/autoload/fzf/vim.vim
@@ -35,15 +35,6 @@ let s:bin = {
 \ 'preview': s:bin_dir.(executable('ruby') ? 'preview.rb' : 'preview.sh'),
 \ 'tags':    s:bin_dir.'tags.pl' }
 let s:TYPE = {'dict': type({}), 'funcref': type(function('call')), 'string': type(''), 'list': type([])}
-if s:is_win
-  if &shellslash
-    let s:bin.preview = fnamemodify(s:bin.preview, ':8')
-  else
-    set shellslash
-    let s:bin.preview = fnamemodify(s:bin.preview, ':8')
-    set noshellslash
-  endif
-endif
 
 function! s:merge_opts(dict, eopts)
   if empty(a:eopts)
@@ -83,7 +74,17 @@ function! fzf#vim#with_preview(...)
     call remove(args, 0)
   endif
 
-  let preview = ['--preview-window', window, '--preview', s:bin.preview.' '.(window =~ 'up\|down' ? '-v' : '').' {}']
+  if s:is_win
+    if exists('s:preview_script')
+      silent! call delete(s:preview_script)
+    endif
+    let s:preview_script = tempname().'.bat'
+    call writefile(['@echo off', fzf#shellescape(s:bin.preview).' %*'], s:preview_script)
+    let script = s:preview_script
+  else
+    let script = s:bin.preview
+  endif
+  let preview = ['--preview-window', window, '--preview', script.(window =~ 'up\|down' ? ' -v ' : ' ').'{}']
 
   if len(args)
     call extend(preview, ['--bind', join(map(args, 'v:val.":toggle-preview"'), ',')])