From b69a61fa775431d1848978081a3a0807769fdb9b Mon Sep 17 00:00:00 2001
From: Ral <noreply@git.tinkeral.ch>
Date: Tue, 28 Mar 2023 00:36:11 +0200
Subject: [PATCH] Print help if no arguments given

---
 src/args.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/args.rs b/src/args.rs
index 9b07992..fff65ea 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -8,7 +8,7 @@ fn hex_address(a: &str) -> Result<u16, std::num::ParseIntError> {
 }
 
 #[derive(Parser, Debug)]
-#[command(version, about, long_about = None, next_line_help = true)]
+#[command(version, about, long_about = None, next_line_help = true, arg_required_else_help(true))]
 pub struct Args {
     /// The linux i2c device file, something like /dev/i2c-*.
     #[arg(short, long)]