From 1651cd7f2031682e5e54d1f9bab48a0b33ffca07 Mon Sep 17 00:00:00 2001
From: Tim Pope <code@tpope.net>
Date: Mon, 13 Sep 2021 16:58:42 -0400
Subject: [PATCH] Extract helper to determine PTY availability

I constantly have to ask about this to troubleshoot bug reports, so make
it easier to determine.

Also rename g:fugitive_pty to make it clearer that it's not a preference
but a debugging tool.
---
 autoload/fugitive.vim | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/autoload/fugitive.vim b/autoload/fugitive.vim
index e679ec1..a62b096 100644
--- a/autoload/fugitive.vim
+++ b/autoload/fugitive.vim
@@ -3433,6 +3433,11 @@ augroup fugitive_job
         \ endfor
 augroup END
 
+function! fugitive#CanPty() abort
+  return get(g:, 'fugitive_pty_debug_override',
+        \ has('unix') && !has('win32unix') && (has('patch-8.0.0744') || has('nvim')) && fugitive#GitVersion() !~# '\.windows\>')
+endfunction
+
 function! fugitive#PagerFor(argv, ...) abort
   let args = a:argv
   if empty(args)
@@ -3609,7 +3614,7 @@ function! fugitive#Command(line1, line2, range, bang, mods, arg) abort
   endif
   if s:run_jobs
     call extend(env, {'COLUMNS': '' . (&columns - 1)}, 'keep')
-    let state.pty = allow_pty && get(g:, 'fugitive_pty', has('unix') && !has('win32unix') && (has('patch-8.0.0744') || has('nvim')) && fugitive#GitVersion() !~# '\.windows\>')
+    let state.pty = allow_pty && fugitive#CanPty()
     if !state.pty
       let args = s:AskPassArgs(dir) + args
     endif