Feature: add more command-line options (#656)

add command-line options to override `external-controller`, `secret` and `external-ui` (#531)

main.go

@@ -18,18 +18,30 @@ import (
 )
 
 var (
-	version    bool
-	testConfig bool
-	homeDir    string
-	configFile string
+	flagset            map[string]bool
+	version            bool
+	testConfig         bool
+	homeDir            string
+	configFile         string
+	externalUI         string
+	externalController string
+	secret             string
 )
 
 func init() {
 	flag.StringVar(&homeDir, "d", "", "set configuration directory")
 	flag.StringVar(&configFile, "f", "", "specify configuration file")
+	flag.StringVar(&externalUI, "ext-ui", "", "override external ui directory")
+	flag.StringVar(&externalController, "ext-ctl", "", "override external controller address")
+	flag.StringVar(&secret, "secret", "", "override secret for RESTful API")
 	flag.BoolVar(&version, "v", false, "show current version of clash")
 	flag.BoolVar(&testConfig, "t", false, "test configuration and exit")
 	flag.Parse()
+
+	flagset = map[string]bool{}
+	flag.Visit(func(f *flag.Flag) {
+		flagset[f.Name] = true
+	})
 }
 
 func main() {
@@ -71,7 +83,18 @@ func main() {
 		return
 	}
 
-	if err := hub.Parse(); err != nil {
+	var options []hub.Option
+	if flagset["ext-ui"] {
+		options = append(options, hub.WithExternalUI(externalUI))
+	}
+	if flagset["ext-ctl"] {
+		options = append(options, hub.WithExternalController(externalController))
+	}
+	if flagset["secret"] {
+		options = append(options, hub.WithSecret(secret))
+	}
+
+	if err := hub.Parse(options...); err != nil {
 		log.Fatalln("Parse config error: %s", err.Error())
 	}