From 9db36f7ba3310c2c51a169ea4a88c77946270b0e Mon Sep 17 00:00:00 2001
From: Jake Craige <jakecraige@users.noreply.github.com>
Date: Sun, 25 Nov 2018 15:47:47 -0800
Subject: [PATCH] Improve serve command error message (#2017)

Update the command matcher for the server command to log a more helpful
message when it's called without a subcommand.

Before:
```sh
$ target/debug/grin server
:: Some(ArgMatches { args: {}, subcommand: None, usage: Some("USAGE:\n    grin server [OPTIONS] [SUBCOMMAND]") })
```

After:
```sh
$ target/debug/grin server
Subcommand required, use 'grin help server' for details
```
---
 src/bin/cmd/server.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/bin/cmd/server.rs b/src/bin/cmd/server.rs
index ebce5b00a..96cbea21c 100644
--- a/src/bin/cmd/server.rs
+++ b/src/bin/cmd/server.rs
@@ -174,6 +174,9 @@ pub fn server_command(server_args: Option<&ArgMatches>, mut global_config: Globa
 				}
 			}
 			("stop", _) => println!("TODO. Just 'kill $pid' for now. Maybe /tmp/grin.pid is $pid"),
+			("", _) => {
+				println!("Subcommand required, use 'grin help server' for details");
+			}
 			(cmd, _) => {
 				println!(":: {:?}", server_args);
 				panic!(