From b12904e21db8a575ccdd35beec3a45072569ba6e Mon Sep 17 00:00:00 2001
From: peter-lyr <llydrp.ldp@gmail.com>
Date: Mon, 24 Aug 2026 12:15:56 +0800
Subject: [PATCH] fix(explorer): handle Windows drive roots correctly in tree
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On Windows, scandir("D:") (no trailing slash) resolves to the drive’s
current directory (e.g. D:/ob1) instead of the root D:/. snacks’ explorer
tree.norm() stripped the trailing slash from "D:/", producing "D:",
so opening or navigating to a drive root showed the current directory’s
contents (stale) instead of the actual root.

Fix two things in tree.lua:
1. norm: keep the trailing slash for Windows drive roots (D:/).
2. Tree:child: skip empty path segment produced by the trailing slash,
   and keep the trailing slash for drive-letter root nodes, avoiding
   double slashes (D://name) when joining child paths.

Verified headless on Windows:
- open D:/ -> real root listing (many entries), not stale ob1 contents
- normal directories unchanged
- navigating D:/ob1 up to D:/ now shows the drive root correctly
---
 lua/snacks/explorer/tree.lua | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/lua/snacks/explorer/tree.lua b/lua/snacks/explorer/tree.lua
index 850c2ae10..d0d43651e 100644
--- a/lua/snacks/explorer/tree.lua
+++ b/lua/snacks/explorer/tree.lua
@@ -26,7 +26,13 @@
 local uv = vim.uv or vim.loop
 
 local function norm(path)
-  return svim.fs.normalize(path):gsub("/$", ""):gsub("^$", "/")
+  path = svim.fs.normalize(path)
+  -- keep trailing slash for Windows drive roots (D:/), otherwise
+  -- scandir("D:") resolves to the drive's current dir, not its root
+  if not path:match("^%a:/$") then
+    path = path:gsub("/$", "")
+  end
+  return path:gsub("^$", "/")
 end
 
 local function assert_dir(path)
@@ -77,9 +83,18 @@ end
 ---@param name string
 ---@param type string
 function Tree:child(node, name, type)
+  -- skip empty segment from trailing slash (e.g. drive root "D:/")
+  if name == "" then
+    return node
+  end
   if not node.children[name] then
-    local path = node.path .. "/" .. name
-    path = node == self.root and name or path
+    -- strip trailing slash from parent so drive roots don't double up ("D://name")
+    local base = node.path:gsub("/$", "")
+    local path = base .. "/" .. name
+    -- drive-letter root ("D:") keeps its trailing slash, so scandir hits the root
+    if node == self.root then
+      path = name:match("^%a:$") and (name .. "/") or name
+    end
     node.children[name] = {
       name = name,
       path = path,