Allow headless hosting via cli

rust/src/cli_parser.rs

@@ -88,7 +88,7 @@ impl INode3D for CliParser {
             .connect_other(self, |s| s.on_join_lobby());
 
         if let Some(port) = options.host {
-            NetworkManager::singleton().bind_mut().host(port);
+            NetworkManager::singleton().bind_mut().host(port, false);
         } else if let Some(addr) = options.join {
             NetworkManager::singleton().bind_mut().join_directly(addr);
         }

rust/src/net/network_manager.rs

@@ -62,7 +62,7 @@ impl INode for NetworkManager {
         cli.bind_mut()
             .signals()
             .on_host()
-            .connect_other(self, |s, port| s.host(port));
+            .connect_other(self, |s, port, headless| s.host(port, headless));
         cli.bind_mut()
             .signals()
             .on_join()
@@ -188,7 +188,7 @@ impl NetworkManager {
         }
     }
 
-    pub fn host(&mut self, port: u16) {
+    pub fn host(&mut self, port: u16, headless: bool) {
         if self.peer.is_none() {
             let mut cli = CommandLinePanel::singleton();
             cli.bind_mut()
@@ -216,7 +216,9 @@ impl NetworkManager {
                         .default_name
                         .clone();
 
-                    if let Some(game) = &mut Game::singleton() {
+                    if let Some(game) = &mut Game::singleton()
+                        && !headless
+                    {
                         let id = game.bind_mut().new_player(
                             SocketAddr::from(([0, 0, 0, 0], 0)),
                             Some(default_name),

rust/src/ui/cli.rs

@@ -128,7 +128,7 @@ impl IPanel for CommandLinePanel {
 #[godot_api]
 impl CommandLinePanel {
     #[signal]
-    pub fn on_host(port: u16);
+    pub fn on_host(port: u16, headless: bool);
     #[signal]
     pub fn on_join(port: String);
     #[signal]
@@ -223,7 +223,14 @@ impl Command for HostCommand {
     fn execute(&self, cli: &mut CommandLinePanel, params: &[&str]) {
         if let Some(port_str) = params.first() {
             if let Ok(port) = u16::from_str_radix(*port_str, 10) {
-                cli.signals().on_host().emit(port);
+                let headless = if let Some(param) = params.get(1)
+                    && *param == "--headless"
+                {
+                    true
+                } else {
+                    false
+                };
+                cli.signals().on_host().emit(port, headless);
             } else {
                 cli.publish_message(format!("Invalid port: {}", port_str), CliColor::Error);
             }

rust/src/ui/main_menu.rs

@@ -211,7 +211,7 @@ impl MainMenu {
         if let Some(host_port) = &self.host_port {
             NetworkManager::singleton()
                 .bind_mut()
-                .host(host_port.get_value() as u16);
+                .host(host_port.get_value() as u16, false);
         }
     }