feat(command): add --config flag to set custom config path (#1479)

cmd/flags/config.go

@@ -2,6 +2,7 @@ package flags
 
 var (
 	DataDir     string
+	ConfigPath  string
 	Debug       bool
 	NoPrefix    bool
 	Dev         bool

cmd/root.go

@@ -27,7 +27,8 @@ func Execute() {
 }
 
 func init() {
-	RootCmd.PersistentFlags().StringVar(&flags.DataDir, "data", "data", "data folder")
+	RootCmd.PersistentFlags().StringVar(&flags.DataDir, "data", "data", "data directory (relative paths are resolved against the current working directory)")
+	RootCmd.PersistentFlags().StringVar(&flags.ConfigPath, "config", "", "path to config.json (relative to current working directory; defaults to [data directory]/config.json, where [data directory] is set by --data)")
 	RootCmd.PersistentFlags().BoolVar(&flags.Debug, "debug", false, "start with debug mode")
 	RootCmd.PersistentFlags().BoolVar(&flags.NoPrefix, "no-prefix", false, "disable env prefix")
 	RootCmd.PersistentFlags().BoolVar(&flags.Dev, "dev", false, "start with dev mode")

internal/bootstrap/config.go

@@ -39,7 +39,21 @@ func InitConfig() {
 	if !filepath.IsAbs(dataDir) {
 		flags.DataDir = filepath.Join(pwd, flags.DataDir)
 	}
-	configPath := filepath.Join(flags.DataDir, "config.json")
+	// Determine config file path: use flags.ConfigPath if provided, otherwise default to <dataDir>/config.json
+	configPath := flags.ConfigPath
+	if configPath == "" {
+		configPath = filepath.Join(flags.DataDir, "config.json")
+	} else {
+		// if relative, resolve relative to working directory
+		if !filepath.IsAbs(configPath) {
+			if absPath, err := filepath.Abs(configPath); err == nil {
+				configPath = absPath
+			} else {
+				configPath = filepath.Join(pwd, configPath)
+			}
+		}
+	}
+	configPath = filepath.Clean(configPath)
 	log.Infof("reading config file: %s", configPath)
 	if !utils.Exists(configPath) {
 		log.Infof("config file not exists, creating default config file")