From 8d25715e55b0cdfea0f2b117fe6a22425884bc1f Mon Sep 17 00:00:00 2001
From: Marko Korhonen <marko.korhonen@reekynet.com>
Date: Sun, 19 Jan 2020 23:16:32 +0200
Subject: [PATCH] Require argument, else display help

Signed-off-by: Marko Korhonen <marko.korhonen@reekynet.com>
---
 src/cli.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/cli.rs b/src/cli.rs
index c438f14..0f69a8c 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -1,11 +1,12 @@
 extern crate clap;
-use clap::{App, Arg};
+use clap::{App, AppSettings, Arg};
 
 pub fn get_args() -> clap::ArgMatches<'static> {
     App::new("LiQuid Screen Dim")
         .version(env!("CARGO_PKG_VERSION"))
         .author(env!("CARGO_PKG_AUTHORS"))
         .about(env!("CARGO_PKG_DESCRIPTION"))
+        .setting(AppSettings::ArgRequiredElseHelp)
         .arg(
             Arg::with_name("dim")
                 .long("dim")