CLI flag to give P2 the controller

src/input.rs

@@ -272,13 +272,14 @@ impl Mappings for InputMapping {
 #[derive(Clone)]
 pub struct MappingProvider {
     persistence: Persistence,
+    first_gamepad_is_p2: bool,
     device_mappings: Arc<RwLock<HashMap<DeviceId, Arc<RwLock<GamepadMapping>>>>>,
     sim_mappings: HashMap<SimId, Arc<RwLock<InputMapping>>>,
     gamepad_info: Arc<RwLock<HashMap<GamepadId, GamepadInfo>>>,
 }
 
 impl MappingProvider {
-    pub fn new(persistence: Persistence) -> Self {
+    pub fn new(persistence: Persistence, first_gamepad_is_p2: bool) -> Self {
         let mut sim_mappings = HashMap::new();
         let mut device_mappings = HashMap::new();
 
@@ -307,6 +308,7 @@ impl MappingProvider {
             device_mappings: Arc::new(RwLock::new(device_mappings)),
             gamepad_info: Arc::new(RwLock::new(HashMap::new())),
             sim_mappings,
+            first_gamepad_is_p2,
         }
     }
 
@@ -338,7 +340,12 @@ impl MappingProvider {
         .clone();
         drop(lock);
         let mut lock = self.gamepad_info.write().unwrap();
-        let bound_to = SimId::values()
+        let players = if self.first_gamepad_is_p2 {
+            vec![SimId::Player2, SimId::Player1]
+        } else {
+            vec![SimId::Player1, SimId::Player2]
+        };
+        let bound_to = players
             .into_iter()
             .find(|sim_id| lock.values().all(|info| info.bound_to != Some(*sim_id)));
         if let Entry::Vacant(entry) = lock.entry(gamepad.id()) {