From 4e9577ed76041a8d79d10ed4beafaf3f8a90ba67 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Thu, 20 Aug 2026 15:14:45 +0100
Subject: [PATCH] build: modernize with "go fix -stringsbuilder": use
 strings.Builder

---
 cmd/serve/s3/utils.go | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/cmd/serve/s3/utils.go b/cmd/serve/s3/utils.go
index a84857766..0d778dc0d 100644
--- a/cmd/serve/s3/utils.go
+++ b/cmd/serve/s3/utils.go
@@ -142,11 +142,11 @@ func prefixParser(p *gofakes3.Prefix) (path, remaining string) {
 func mkdirRecursive(path string, VFS *vfs.VFS) error {
 	path = strings.Trim(path, "/")
 	dirs := strings.Split(path, "/")
-	dir := ""
+	var dir strings.Builder
 	for _, d := range dirs {
-		dir += "/" + d
-		if _, err := VFS.Stat(dir); err != nil {
-			err := VFS.Mkdir(dir, 0777)
+		dir.WriteString("/" + d)
+		if _, err := VFS.Stat(dir.String()); err != nil {
+			err := VFS.Mkdir(dir.String(), 0777)
 			if err != nil {
 				return err
 			}