CLI argument to start the server at startup

src/app.rs

@@ -41,10 +41,15 @@ pub struct Application {
     persistence: Persistence,
     viewports: HashMap<ViewportId, Viewport>,
     focused: Option<ViewportId>,
+    init_debug_port: Option<u16>,
 }
 
 impl Application {
-    pub fn new(client: EmulatorClient, proxy: EventLoopProxy<UserEvent>) -> Self {
+    pub fn new(
+        client: EmulatorClient,
+        proxy: EventLoopProxy<UserEvent>,
+        debug_port: Option<u16>,
+    ) -> Self {
         let icon = load_icon().ok().map(Arc::new);
         let persistence = Persistence::new();
         let mappings = MappingProvider::new(persistence.clone());
@@ -63,6 +68,7 @@ impl Application {
             persistence,
             viewports: HashMap::new(),
             focused: None,
+            init_debug_port: debug_port,
         }
     }
 
@@ -86,9 +92,12 @@ impl ApplicationHandler<UserEvent> for Application {
             self.persistence.clone(),
             SimId::Player1,
         );
-        let wrapper = Viewport::new(event_loop, self.icon.clone(), Box::new(app));
-        self.focused = Some(wrapper.id());
-        self.viewports.insert(wrapper.id(), wrapper);
+        self.open(event_loop, Box::new(app));
+        if let Some(port) = self.init_debug_port {
+            let mut server = GdbServerWindow::new(SimId::Player1, self.client.clone());
+            server.start(port);
+            self.open(event_loop, Box::new(server));
+        }
     }
 
     fn window_event(