U main.go: add -extract arg for builtin static

server-go/cloud-clip/main.go

@@ -378,12 +378,57 @@ func mkdir_uploads() {
 	}
 }
 
+func extract_static(dest_dir string) error {
+	// mkdir
+	if _, err := os.Stat(dest_dir); os.IsNotExist(err) {
+		err := os.MkdirAll(dest_dir, 0755)
+		if err != nil {
+			log.Fatalf("Failed to create extract directory: %v", err)
+		}
+		log.Println("++ Extract directory Created")
+	} else {
+		fmt.Println("== Extract directory Exists")
+	}
+
+	// extract
+	err := fs.WalkDir(embed_static_fs, "static", func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+
+		relPath := strings.TrimPrefix(path, "static")
+		destPath := filepath.Join(dest_dir, relPath)
+
+		if d.IsDir() {
+			return os.MkdirAll(destPath, 0755)
+		}
+
+		data, err := embed_static_fs.ReadFile(path)
+		if err != nil {
+			return err
+		}
+
+		return os.WriteFile(destPath, data, 0644)
+	})
+
+	if err != nil {
+		log.Fatalf("Failed to extract static files: %v", err)
+	} else {
+		fmt.Println("== builtin Static files extracted to", dest_dir)
+	}
+
+	return nil
+}
+
 //go:embed static
 var embed_static_fs embed.FS
 
 // specify external static folder
 var flg_external_static = flag.String("static", "", "Path to external static files, example ./static")
 
+// extract builtin static for user custmize
+var flg_extract = flag.String("extract", "", "Path to extract builtin static, example ./static_out")
+
 func main() {
 	load_history()
 	mkdir_uploads() // mkdir -p uplodas
@@ -392,6 +437,11 @@ func main() {
 
 	flag.Parse()
 
+	if *flg_extract != "" {
+		extract_static(*flg_extract)
+		return
+	}
+
 	if *flg_external_static == "" {
 		// use builtin static
 		fmt.Println("== serve from builtin static")