From ddefa110702e4f219886eab2b10980d1315b7b1b Mon Sep 17 00:00:00 2001
From: robobun <robobun@oven.sh>
Date: Sun, 1 Feb 2026 00:33:59 -0800
Subject: [PATCH] fix(fs): handle '.' path normalization on Windows (#26634)
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## Summary
- Fix path normalization for "." on Windows where `normalizeStringBuf`
was incorrectly stripping it to an empty string
- This caused `existsSync('.')`, `statSync('.')`, and other fs
operations to fail on Windows

## Test plan
- Added regression test `test/regression/issue/26631.test.ts` that tests
`existsSync`, `exists`, `statSync`, and `stat` for both `.` and `..`
paths
- All tests pass locally with `bun bd test
test/regression/issue/26631.test.ts`
- Verified code compiles on all platforms with `bun run zig:check-all`

Fixes #26631

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
---
 src/bun.js/node/types.zig           |  4 +++
 test/regression/issue/26631.test.ts | 42 +++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 test/regression/issue/26631.test.ts

diff --git a/src/bun.js/node/types.zig b/src/bun.js/node/types.zig
index 4e5fc66cac..e0bb397537 100644
--- a/src/bun.js/node/types.zig
+++ b/src/bun.js/node/types.zig
@@ -649,6 +649,10 @@ pub const PathLike = union(enum) {
                 const normal = path_handler.normalizeBuf(resolve, b, .windows);
                 return strings.toKernel32Path(@alignCast(std.mem.bytesAsSlice(u16, buf)), normal);
             }
+            // Handle "." specially since normalizeStringBuf strips it to an empty string
+            if (s.len == 1 and s[0] == '.') {
+                return strings.toKernel32Path(@alignCast(std.mem.bytesAsSlice(u16, buf)), ".");
+            }
             const normal = path_handler.normalizeStringBuf(s, b, true, .windows, false);
             return strings.toKernel32Path(@alignCast(std.mem.bytesAsSlice(u16, buf)), normal);
         }
diff --git a/test/regression/issue/26631.test.ts b/test/regression/issue/26631.test.ts
new file mode 100644
index 0000000000..6598f4b706
--- /dev/null
+++ b/test/regression/issue/26631.test.ts
@@ -0,0 +1,42 @@
+import { expect, test } from "bun:test";
+import { existsSync, statSync } from "node:fs";
+import { exists, stat } from "node:fs/promises";
+
+// https://github.com/oven-sh/bun/issues/26631
+// Path resolution fails for current directory '.' on Windows
+
+test("existsSync('.') should return true", () => {
+  expect(existsSync(".")).toBe(true);
+});
+
+test("exists('.') should return true", async () => {
+  expect(await exists(".")).toBe(true);
+});
+
+test("statSync('.') should return directory stats", () => {
+  const stats = statSync(".");
+  expect(stats.isDirectory()).toBe(true);
+});
+
+test("stat('.') should return directory stats", async () => {
+  const stats = await stat(".");
+  expect(stats.isDirectory()).toBe(true);
+});
+
+test("existsSync('..') should return true", () => {
+  expect(existsSync("..")).toBe(true);
+});
+
+test("exists('..') should return true", async () => {
+  expect(await exists("..")).toBe(true);
+});
+
+test("statSync('..') should return directory stats", () => {
+  const stats = statSync("..");
+  expect(stats.isDirectory()).toBe(true);
+});
+
+test("stat('..') should return directory stats", async () => {
+  const stats = await stat("..");
+  expect(stats.isDirectory()).toBe(true);
+});