From ae45609cfc3fae91bb7859dde95cb0aee493f34c Mon Sep 17 00:00:00 2001
From: Tim Pope <code@tpope.net>
Date: Mon, 12 Apr 2021 14:29:53 -0400
Subject: [PATCH] Proactively detect Git dir if autocommand hasn't triggered

This is a little clunky, but enabling !empty(FugitiveGitDir()) to work
in autocommands that trigger before ours should provide an acceptable
replacement for the "User Fugitive" event and will hopefully enable us
to unltimately eliminate preemptive detection entirely.
---
 plugin/fugitive.vim | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index 0c3affe..35dca8f 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -16,9 +16,15 @@ function! FugitiveGitDir(...) abort
     let dir = get(b:, 'git_dir', '')
     if empty(dir) && (empty(bufname('')) || &buftype =~# '^\%(nofile\|acwrite\|quickfix\|prompt\)$')
       return FugitiveExtractGitDir(getcwd())
+    elseif !exists('b:git_dir') && empty(&buftype)
+      let b:git_dir = FugitiveExtractGitDir(expand('%:p'))
+      return b:git_dir
     endif
     return dir
   elseif type(a:1) == type(0)
+    if a:1 == bufnr('') && !exists('b:git_dir') && empty(&buftype)
+      let b:git_dir = FugitiveExtractGitDir(expand('%:p'))
+    endif
     return getbufvar(a:1, 'git_dir')
   elseif type(a:1) == type('')
     return substitute(s:Slash(a:1), '/$', '', '')