added logs

main.go

@@ -16,6 +16,26 @@ func defaultConfigPath() string {
 	return filepath.Join(home, ".config", "qbhardlink", "config.yaml")
 }
 
+func defaultLogPath() string {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		home = "."
+	}
+	return filepath.Join(home, ".config", "qbhardlink", "qbhardlink.log")
+}
+
+func setupLogger(logPath string) (*os.File, error) {
+	if err := os.MkdirAll(filepath.Dir(logPath), 0755); err != nil {
+		return nil, err
+	}
+	f, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		return nil, err
+	}
+	log.SetOutput(f)
+	return f, nil
+}
+
 func main() {
 	log.SetFlags(log.Ldate | log.Ltime)
 
@@ -24,17 +44,31 @@ func main() {
 		category    = flag.String("category", "", "Torrent category (%L) [required]")
 		contentPath = flag.String("content-path", "", "Content path (%F) [required]")
 		configPath  = flag.String("config", defaultConfigPath(), "Path to config YAML file")
+		logPath     = flag.String("log", defaultLogPath(), "Path to log file (empty to disable)")
 	)
 	flag.Parse()
 
 	if *category == "" || *contentPath == "" {
-		fmt.Fprintln(os.Stderr, "Usage: qbhardlink --category <cat> --content-path <path> [--name <name>] [--config <path>]")
+		fmt.Fprintln(os.Stderr, "Usage: qbhardlink --category <cat> --content-path <path> [--name <name>] [--config <path>] [--log <path>]")
 		fmt.Fprintln(os.Stderr, "")
 		fmt.Fprintln(os.Stderr, "qBittorrent run-on-finish example:")
 		os.Stderr.WriteString("  /usr/local/bin/qbhardlink --name \"%N\" --category \"%L\" --content-path \"%F\"\n")
 		os.Exit(1)
 	}
 
+	if *logPath != "" {
+		f, err := setupLogger(*logPath)
+		if err != nil {
+			log.Printf("warning: could not open log file %q: %v (logging to stderr)", *logPath, err)
+		} else {
+			defer f.Close()
+		}
+	}
+
+	log.Printf("--- start ---")
+	log.Printf("name=%q category=%q content-path=%q", *name, *category, *contentPath)
+	log.Printf("config=%q", *configPath)
+
 	cfg, err := loadConfig(*configPath)
 	if err != nil {
 		log.Fatalf("config: %v", err)
@@ -42,11 +76,11 @@ func main() {
 
 	destSubdir, ok := cfg.Categories[*category]
 	if !ok {
-		log.Printf("category %q not in config, nothing to do (torrent: %s)", *category, *name)
+		log.Printf("category %q not in config, nothing to do", *category)
 		os.Exit(0)
 	}
 
-	log.Printf("processing torrent %q (category: %s -> %s)", *name, *category, destSubdir)
+	log.Printf("category %q -> dest subdir %q", *category, destSubdir)
 
 	if err := processHardlinks(cfg, *contentPath, destSubdir); err != nil {
 		log.Fatalf("error: %v", err)