From a36880be2217814b7034f05eb0f402e8183befc9 Mon Sep 17 00:00:00 2001
From: Linwei <skywind3000@gmail.com>
Date: Sat, 30 May 2020 16:51:45 +0800
Subject: [PATCH] Prevent temporary window creation on Windows (#611)

Co-authored-by: skywind3000 <skywind3000@163.com>
Co-authored-by: Caleb Maclennan <caleb@alerque.com>
---
 autoload/tagbar.vim | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/autoload/tagbar.vim b/autoload/tagbar.vim
index 0f67dea..565fc2b 100644
--- a/autoload/tagbar.vim
+++ b/autoload/tagbar.vim
@@ -2871,6 +2871,39 @@ function! s:EscapeCtagsCmd(ctags_bin, args, ...) abort
     return ctags_cmd
 endfunction
 
+" run shell command in a proper way: prevent temporary window creation
+function! s:run_system(cmd, version) abort
+    if has('win32') && !has('nvim') && a:version > 0 && (has('python3') || has('python2'))
+        if a:version == 3 && has('python3')
+            let pyx = 'py3 '
+            let python_eval = 'py3eval'
+        elseif a:version == 2 && has('python2')
+            let pyx = 'py2 '
+            let python_eval = 'pyeval'
+        else
+            let pyx = 'pyx '
+            let python_eval = 'pyxeval'
+        endif
+        let l:pc = 0
+        exec pyx . 'import subprocess, vim'
+        exec pyx . '__argv = {"args":vim.eval("a:cmd"), "shell":True}'
+        exec pyx . '__argv["stdout"] = subprocess.PIPE'
+        exec pyx . '__argv["stderr"] = subprocess.STDOUT'
+        exec pyx . '__pp = subprocess.Popen(**__argv)'
+        exec pyx . '__return_text = __pp.stdout.read()'
+        exec pyx . '__pp.stdout.close()'
+        exec pyx . '__return_code = __pp.wait()'
+        exec 'let l:hr = '. python_eval .'("__return_text")'
+        exec 'let l:pc = '. python_eval .'("__return_code")'
+        let s:shell_error = l:pc
+        return l:hr
+    endif
+    let hr = system(a:cmd)
+    let s:shell_error = v:shell_error
+    return hr
+endfunction
+
+
 " s:ExecuteCtags() {{{2
 " Execute ctags with necessary shell settings
 " Partially based on the discussion at
@@ -2908,7 +2941,8 @@ function! s:ExecuteCtags(ctags_cmd) abort
         call tagbar#debug#log('Exit code: ' . v:shell_error)
         redraw!
     else
-        silent let ctags_output = system(a:ctags_cmd)
+        let py_version = get(g:, 'tagbar_python', 1)
+        silent let ctags_output = s:run_system(a:ctags_cmd, py_version)
     endif
 
     if &shell =~? 'cmd\.exe'