if not have file arg, will print usage

2019-03-07 04:28:15 +08:00 · 2019-03-07 04:28:15 +08:00 · 3d41f036da
commit 3d41f036da
parent 32d9c634d1
1 changed files with 5 additions and 0 deletions
--- a/main.go
+++ b/main.go
@ -44,6 +44,11 @@ func main() {

 	flag.Parse()

+	if len(flag.Args()) == 0{
+		flag.Usage()
+		return
+	}
+
 	switch profiler {
 	case "cpu":
 		defer profile.Start(profile.ProfilePath("."), profile.NoShutdownHook).Stop()