handle help and wrong flags

main.go

@@ -11,6 +11,7 @@ import (
 	"github.com/eclipse-xpanse/policy-man/config"
 	"github.com/eclipse-xpanse/policy-man/log"
 	"github.com/eclipse-xpanse/policy-man/server"
+	"github.com/spf13/pflag"
 )
 
 // Add comments to describe server openAPI information
@@ -22,14 +23,20 @@ func main() {
 
 	cfg, err := config.LoadConf()
 	if err != nil {
-		fmt.Print("load config failed")
+		fmt.Print("loading config failed\n")
+		return
 	}
+
 	if err = log.InitLog(cfg.Log.Level, cfg.Log.Path); err != nil {
 		return
 	}
 
 	ctx := context.Background()
 
+	if isFlagPassed("help") {
+		return
+	}
+
 	go func() {
 		err := server.RunHTTPServer(ctx, cfg)
 		if err != nil {
@@ -40,3 +47,14 @@ func main() {
 
 	<-ctx.Done()
 }
+
+func isFlagPassed(name string) bool {
+	found := false
+	config.RootCmd.Flags().Visit(func(flag *pflag.Flag) {
+		if flag.Name == name {
+			found = true
+			return
+		}
+	})
+	return found
+}