Improve help description

miaokong0724 · Jan 22, 2020 · 93d0b02 · 93d0b02
1 parent 2786970
commit 93d0b02
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/samples/simple-client/src/main.rs b/samples/simple-client/src/main.rs
@@ -12,17 +12,21 @@ struct Args {
     url: String,
 }
 
+const DEFAULT_URL : &str= "opc.tcp://localhost:4855";
+
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Read command line arguments
     let mut args = pico_args::Arguments::from_env();
     let args = Args {
         help: args.contains(["-h", "--help"]),
-        url: args.opt_value_from_str("--url")?.unwrap_or(String::from("opc.tcp://localhost:4855")),
+        url: args.opt_value_from_str("--url")?.unwrap_or(String::from(DEFAULT_URL)),
     };
 
     if args.help {
-        println!(r#"Simple Client"#);
-        println!(r#"Usage: simple-client --url [url]"#);
+        println!("Simple Client");
+        println!("Usage: simple-client --url [url]");
+        println!("  -h, --help   Show help");
+        println!("  --url [url]  Url to connect to (default: {})", DEFAULT_URL);
     }
     else {
         // Optional - enable OPC UA logging