rstnode: implement basic layered event handlers

games/rstnode/rst-server/src/cli.rs

@@ -0,0 +1,20 @@
+use crate::constants::{NAME, VERSION};
+use clap::{App, Arg};
+use std::path::PathBuf;
+
+pub fn parse() -> PathBuf {
+    let app = App::new(NAME)
+        .version(VERSION)
+        .author("Bread Machine (Katharina Fey <kookie@spacekookie.de>)")
+        .about("Stand-alone game server binary")
+        .arg(
+            Arg::with_name("assets")
+                .required(true)
+                .takes_value(true)
+                .default_value("./assets/maps")
+                .help("Path to map assets directory"),
+        );
+
+    let m = app.get_matches();
+    PathBuf::new().join(m.value_of("assets").unwrap_or("./assets/maps"))
+}