From 39f9298cb2944071b2b19a6b28edf0939aa4312d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=AF=9B=E9=80=B8=E5=AE=81?= <mao.yining@outlook.com>
Date: Sat, 16 Aug 2025 17:38:33 +0200
Subject: [PATCH] runtime(vim9): Disable shellslash for shellescape() in Open()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

fixes: #17995
closes: #18004

Signed-off-by: 毛逸宁 <mao.yining@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
---
 runtime/autoload/dist/vim9.vim | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/runtime/autoload/dist/vim9.vim b/runtime/autoload/dist/vim9.vim
index 6d4079ea36..fa14bdaf04 100644
--- a/runtime/autoload/dist/vim9.vim
+++ b/runtime/autoload/dist/vim9.vim
@@ -3,7 +3,7 @@ vim9script
 # Vim runtime support library
 #
 # Maintainer:   The Vim Project <https://github.com/vim/vim>
-# Last Change:  2025 Jan 29
+# Last Change:  2025 Aug 15
 
 export def IsSafeExecutable(filetype: string, executable: string): bool
   if empty(exepath(executable))
@@ -121,6 +121,11 @@ def Viewer(): string
 enddef
 
 export def Open(file: string)
+  # disable shellslash for shellescape, required on Windows #17995
+  if exists('+shellslash') && &shellslash
+    &shellslash = false
+    defer setbufvar('%', '&shellslash', true)
+  endif
   Launch($"{Viewer()} {shellescape(file, 1)}")
 enddef