skip unsupported files

internal/ripsort.go

@@ -42,7 +42,12 @@ func Sort(dst, path string) {
 		os.Exit(1)
 	}
 
+	// Handle single file
 	if !info.IsDir() {
+		if !fileSupported(path) {
+			slog.Error("Unsupported file format", "file", path)
+			os.Exit(1)
+		}
 		if err := sortSong(path, dst); err != nil {
 			slog.Error("Failed to sort single file", "file", path, "err", err)
 			os.Exit(1)
@@ -50,6 +55,7 @@ func Sort(dst, path string) {
 		return
 	}
 
+	// Handle directory
 	err = filepath.WalkDir(path, func(p string, d fs.DirEntry, err error) error {
 		if err != nil {
 			slog.Error("Failed to walk path", "path", path, "file", p, "err", err)
@@ -57,6 +63,9 @@ func Sort(dst, path string) {
 		}
 
 		if !d.IsDir() {
+			if !fileSupported(p) {
+				return nil
+			}
 			if err := sortSong(p, dst); err != nil {
 				slog.Error("Failed to sort file", "file", p, "err", err)
 				return err