From bf596c035e43c11c1e9f7e31a24af0dcca333d51 Mon Sep 17 00:00:00 2001
From: Nick Vollmar <nvollmar@cloudflare.com>
Date: Mon, 17 Dec 2018 11:18:34 -0600
Subject: [PATCH] TUN-1140: Show usage if invoked with no args or config

---
 cmd/cloudflared/main.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/cmd/cloudflared/main.go b/cmd/cloudflared/main.go
index b7bd2442..a5bea5fb 100644
--- a/cmd/cloudflared/main.go
+++ b/cmd/cloudflared/main.go
@@ -83,8 +83,15 @@ func flags() []cli.Flag {
 	return append(flags, access.Flags()...)
 }
 
+func isEmptyInvocation(c *cli.Context) bool {
+	return c.NArg() == 0 && c.NumFlags() == 0
+}
+
 func action(version string, shutdownC, graceShutdownC chan struct{}) cli.ActionFunc {
 	return func(c *cli.Context) (err error) {
+		if isEmptyInvocation(c) {
+			cli.ShowAppHelpAndExit(c, 1)
+		}
 		tags := make(map[string]string)
 		tags["hostname"] = c.String("hostname")
 		raven.SetTagsContext(tags)