From 028dd3c5c4d1828eec64c099d3372ffb90572dc0 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Fri, 12 Jul 2024 14:30:49 +0800
Subject: vim-patch:9.1.0569: fnamemodify() treats ".." and "../" differently
 (#29673)

Problem:  fnamemodify() treats ".." and "../" differently.
Solution: Expand ".." properly like how "/.." is treated in 8.2.3388.
          (zeertzjq)

closes: vim/vim#15218

https://github.com/vim/vim/commit/1ee7420460768df67ea4bc73467f2d4f8b1555bd
---
 src/nvim/path.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'src/nvim')

diff --git a/src/nvim/path.c b/src/nvim/path.c
index e33e34fff3..adea7ff0f7 100644
--- a/src/nvim/path.c
+++ b/src/nvim/path.c
@@ -2393,9 +2393,13 @@ static int path_to_absolute(const char *fname, char *buf, size_t len, int force)
       p = strrchr(fname, '\\');
     }
 #endif
+    if (p == NULL && strcmp(fname, "..") == 0) {
+      // Handle ".." without path separators.
+      p = fname + 2;
+    }
     if (p != NULL) {
-      if (strcmp(p + 1, "..") == 0) {
-        // for "/path/dir/.." include the "/.."
+      if (vim_ispathsep_nocolon(*p) && strcmp(p + 1, "..") == 0) {
+        // For "/path/dir/.." include the "/..".
         p += 3;
       }
       assert(p >= fname);
-- 
cgit