fix(headless-fixes): remove InputSystem and NuiManager from headlesses

engine/src/main/java/org/terasology/engine/core/TerasologyEngine.java

@@ -247,7 +247,6 @@ private void verifyInitialisation() {
         verifyRequiredSystemIsRegistered(Time.class);
         verifyRequiredSystemIsRegistered(DisplayDevice.class);
         verifyRequiredSystemIsRegistered(RenderingSubsystemFactory.class);
-        verifyRequiredSystemIsRegistered(InputSystem.class);
     }
 
     /**
@@ -588,7 +587,9 @@ private void switchState(GameState newState) {
         newState.init(this);
         stateChangeSubscribers.forEach(StateChangeSubscriber::onStateChange);
         InputSystem inputSystem = rootContext.get(InputSystem.class);
-        inputSystem.drainQueues();
+        if (inputSystem != null) {
+            inputSystem.drainQueues();
+        }
     }
 
     @Override

engine/src/main/java/org/terasology/engine/core/modes/AbstractState.java

@@ -31,7 +31,7 @@ public abstract class AbstractState implements GameState {
     protected EventSystem eventSystem;
     protected ComponentSystemManager componentSystemManager;
 
-    protected void initEntityAndComponentManagers() {
+    protected void initEntityAndComponentManagers(boolean isHeadless) {
         verifyNotNull(context);
         CoreRegistry.setContext(context);
 
@@ -41,9 +41,10 @@ protected void initEntityAndComponentManagers() {
 
         eventSystem = context.get(EventSystem.class);
         context.put(Console.class, new ConsoleImpl(context));
-
-        NUIManager nuiManager = new NUIManagerInternal((TerasologyCanvasRenderer) context.get(CanvasRenderer.class), context);
-        context.put(NUIManager.class, nuiManager);
+        if (!isHeadless) {
+            NUIManager nuiManager = new NUIManagerInternal((TerasologyCanvasRenderer) context.get(CanvasRenderer.class), context);
+            context.put(NUIManager.class, nuiManager);
+        }
 
         componentSystemManager = new ComponentSystemManager(context);
         context.put(ComponentSystemManager.class, componentSystemManager);

engine/src/main/java/org/terasology/engine/core/modes/StateIngame.java

@@ -83,24 +83,28 @@ public void init(GameEngine engine) {
         componentSystemManager = context.get(ComponentSystemManager.class);
         entityManager = context.get(EngineEntityManager.class);
         cameraTargetSystem = context.get(CameraTargetSystem.class);
-        inputSystem = context.get(InputSystem.class);
-        eventSystem.registerEventHandler(nuiManager);
+        if (nuiManager != null) {
+            inputSystem = context.get(InputSystem.class);
+            eventSystem.registerEventHandler(nuiManager);
+        }
         networkSystem = context.get(NetworkSystem.class);
         storageManager = context.get(StorageManager.class);
         storageServiceWorker = context.get(StorageServiceWorker.class);
         console = context.get(Console.class);
 
-        // Show or hide the HUD according to the settings
-        nuiManager.getHUD().bindVisible(new ReadOnlyBinding<Boolean>() {
-            @Override
-            public Boolean get() {
-                return !context.get(Config.class).getRendering().getDebug().isHudHidden();
-            }
-        });
+        if (nuiManager != null) {
+            // Show or hide the HUD according to the settings
+            nuiManager.getHUD().bindVisible(new ReadOnlyBinding<Boolean>() {
+                @Override
+                public Boolean get() {
+                    return !context.get(Config.class).getRendering().getDebug().isHudHidden();
+                }
+            });
+        }
 
         if (networkSystem.getMode() == NetworkMode.CLIENT) {
             String motd = networkSystem.getServer().getInfo().getMOTD();
-            if (motd != null && motd.length() != 0) {
+            if (nuiManager != null && motd != null && motd.length() != 0) {
                 nuiManager.pushScreen(MessagePopup.ASSET_URI, MessagePopup.class).setMessage("Server MOTD", motd);
             }
         }
@@ -133,7 +137,9 @@ public void dispose(boolean shuttingDown) {
         // TODO: Shutdown background threads
         eventSystem.process();
         GameThread.processWaitingProcesses();
-        nuiManager.clear();
+        if (nuiManager != null) {
+            nuiManager.clear();
+        }
 
         context.get(AudioManager.class).stopAllSounds();
 
@@ -162,11 +168,13 @@ public void dispose(boolean shuttingDown) {
         console.dispose();
         GameThread.clearWaitingProcesses();
 
-        /*
-         * Clear the binding as otherwise the complete ingame state would be
-         * referenced.
-         */
-        nuiManager.getHUD().clearVisibleBinding();
+        if (nuiManager != null) {
+            /*
+             * Clear the binding as otherwise the complete ingame state would be
+             * referenced.
+             */
+            nuiManager.getHUD().clearVisibleBinding();
+        }
     }
 
     @Override
@@ -187,8 +195,9 @@ public void update(float delta) {
             storageManager.update();
         }
 
-
-        updateUserInterface(delta);
+        if (nuiManager != null) {
+            updateUserInterface(delta);
+        }
 
         storageServiceWorker.flushNotificationsToConsole(console);
     }

engine/src/main/java/org/terasology/engine/core/modes/StateLoading.java

@@ -26,10 +26,10 @@
 import org.terasology.engine.core.modes.loadProcesses.InitialisePhysics;
 import org.terasology.engine.core.modes.loadProcesses.InitialiseRecordAndReplay;
 import org.terasology.engine.core.modes.loadProcesses.InitialiseRemoteWorld;
+import org.terasology.engine.core.modes.loadProcesses.InitialiseRendering;
 import org.terasology.engine.core.modes.loadProcesses.InitialiseSystems;
 import org.terasology.engine.core.modes.loadProcesses.InitialiseWorld;
 import org.terasology.engine.core.modes.loadProcesses.InitialiseWorldGenerator;
-import org.terasology.engine.core.modes.loadProcesses.InitialiseRendering;
 import org.terasology.engine.core.modes.loadProcesses.JoinServer;
 import org.terasology.engine.core.modes.loadProcesses.LoadEntities;
 import org.terasology.engine.core.modes.loadProcesses.LoadExtraBlockData;
@@ -110,8 +110,10 @@ public void init(GameEngine engine) {
 
         systemConfig = context.get(SystemConfig.class);
 
-        this.nuiManager = new NUIManagerInternal((TerasologyCanvasRenderer) context.get(CanvasRenderer.class), context);
-        context.put(NUIManager.class, nuiManager);
+        if (netMode.hasLocalClient()) {
+            this.nuiManager = new NUIManagerInternal((TerasologyCanvasRenderer) context.get(CanvasRenderer.class), context);
+            context.put(NUIManager.class, nuiManager);
+        }
 
         EngineTime time = (EngineTime) context.get(Time.class);
         time.setPaused(true);
@@ -134,9 +136,10 @@ public void init(GameEngine engine) {
         }
 
         popStep();
-        loadingScreen = nuiManager.pushScreen("engine:loadingScreen", LoadingScreen.class);
-        loadingScreen.updateStatus(current.getMessage(), current.getProgress());
-
+        if (nuiManager != null) {
+            loadingScreen = nuiManager.pushScreen("engine:loadingScreen", LoadingScreen.class);
+            loadingScreen.updateStatus(current.getMessage(), current.getProgress());
+        }
         chunkGenerationStarted = false;
     }
 
@@ -167,16 +170,20 @@ private void initClient() {
 
     private void initHost() {
         loadProcesses.add(new RegisterMods(context, gameManifest));
-        if(netMode.hasLocalClient()) {
+        if (netMode.hasLocalClient()) {
             loadProcesses.add(new InitialiseRendering(context));
         }
         loadProcesses.add(new InitialiseEntitySystem(context));
         loadProcesses.add(new RegisterBlocks(context, gameManifest));
-        loadProcesses.add(new InitialiseGraphics(context));
+        if (netMode.hasLocalClient()) {
+            loadProcesses.add(new InitialiseGraphics(context));
+        }
         loadProcesses.add(new LoadPrefabs(context));
         loadProcesses.add(new ProcessBlockPrefabs(context));
         loadProcesses.add(new InitialiseComponentSystemManager(context));
-        loadProcesses.add(new RegisterInputSystem(context));
+        if (netMode.hasLocalClient()) {
+            loadProcesses.add(new RegisterInputSystem(context));
+        }
         loadProcesses.add(new RegisterSystems(context, netMode));
         loadProcesses.add(new InitialiseCommandSystem(context));
         loadProcesses.add(new LoadExtraBlockData(context));
@@ -252,14 +259,17 @@ public void update(float delta) {
             }
         }
         if (current == null) {
-            nuiManager.closeScreen(loadingScreen);
-            nuiManager.setHUDVisible(true);
+            if (nuiManager != null) {
+                nuiManager.closeScreen(loadingScreen);
+                nuiManager.setHUDVisible(true);
+            }
             context.get(GameEngine.class).changeState(new StateIngame(gameManifest, context));
         } else {
             float progressValue = (progress + current.getExpectedCost() * current.getProgress()) / maxProgress;
-            loadingScreen.updateStatus(current.getMessage(), progressValue);
-            nuiManager.update(delta);
-
+            if (nuiManager != null) {
+                loadingScreen.updateStatus(current.getMessage(), progressValue);
+                nuiManager.update(delta);
+            }
             // chunk generation begins at the AwaitCharacterSpawn step
             if (current instanceof AwaitCharacterSpawn && !chunkGenerationStarted) {
                 chunkGenerationStarted = true;
@@ -280,7 +290,9 @@ public void update(float delta) {
 
     @Override
     public void render() {
-        nuiManager.render();
+        if (nuiManager != null) {
+            nuiManager.render();
+        }
     }
 
     @Override

engine/src/main/java/org/terasology/engine/core/modes/StateMainMenu.java

@@ -44,7 +44,7 @@ public StateMainMenu(String showMessageOnLoad) {
     @Override
     public void init(GameEngine gameEngine) {
         context = gameEngine.createChildContext();
-        initEntityAndComponentManagers();
+        initEntityAndComponentManagers(false);
 
         createLocalPlayer(context);
 

engine/src/main/java/org/terasology/engine/core/subsystem/headless/HeadlessInput.java

@@ -4,7 +4,6 @@
 
 import org.terasology.engine.context.Context;
 import org.terasology.engine.core.subsystem.EngineSubsystem;
-import org.terasology.engine.input.InputSystem;
 
 public class HeadlessInput implements EngineSubsystem {
 
@@ -19,8 +18,7 @@ public void postInitialise(Context context) {
     }
 
     private void initControls(Context context) {
-        InputSystem inputSystem = new InputSystem();
-        context.put(InputSystem.class, inputSystem);
+
     }
 
 }

engine/src/main/java/org/terasology/engine/core/subsystem/headless/mode/StateHeadlessSetup.java

@@ -15,7 +15,6 @@
 import org.terasology.engine.core.module.ModuleManager;
 import org.terasology.engine.core.module.StandardModuleExtension;
 import org.terasology.engine.game.GameManifest;
-import org.terasology.engine.input.InputSystem;
 import org.terasology.engine.network.NetworkMode;
 import org.terasology.engine.rendering.nui.layers.mainMenu.savedGames.GameInfo;
 import org.terasology.engine.rendering.nui.layers.mainMenu.savedGames.GameProvider;
@@ -40,12 +39,9 @@ public StateHeadlessSetup() {
     @Override
     public void init(GameEngine gameEngine) {
         context = gameEngine.createChildContext();
-        initEntityAndComponentManagers();
+        initEntityAndComponentManagers(true);
         createLocalPlayer(context);
 
-        componentSystemManager.register(context.get(InputSystem.class), "engine:InputSystem");
-        componentSystemManager.initialise();
-
         GameManifest gameManifest;
         List<GameInfo> savedGames = GameProvider.getSavedGames();
         if (savedGames.size() > 0) {

engine/src/main/java/org/terasology/engine/core/subsystem/headless/renderer/HeadlessWorldRenderer.java

@@ -8,7 +8,6 @@
 import org.joml.Vector3ic;
 import org.terasology.engine.config.Config;
 import org.terasology.engine.context.Context;
-import org.terasology.engine.logic.players.LocalPlayerSystem;
 import org.terasology.engine.monitoring.PerformanceMonitor;
 import org.terasology.engine.rendering.assets.material.Material;
 import org.terasology.engine.rendering.cameras.Camera;
@@ -48,8 +47,6 @@ public class HeadlessWorldRenderer implements WorldRenderer {
     public HeadlessWorldRenderer(Context context) {
         this.worldProvider = context.get(WorldProvider.class);
         this.chunkProvider = context.get(ChunkProvider.class);
-        LocalPlayerSystem localPlayerSystem = context.get(LocalPlayerSystem.class);
-        localPlayerSystem.setPlayerCamera(noCamera);
         config = context.get(Config.class);
     }
 

engine/src/main/java/org/terasology/engine/input/InputSystem.java

@@ -14,6 +14,7 @@
 import org.terasology.engine.core.subsystem.config.BindsManager;
 import org.terasology.engine.entitySystem.entity.EntityRef;
 import org.terasology.engine.entitySystem.systems.BaseComponentSystem;
+import org.terasology.engine.entitySystem.systems.RegisterMode;
 import org.terasology.engine.entitySystem.systems.RegisterSystem;
 import org.terasology.engine.input.cameraTarget.CameraTargetSystem;
 import org.terasology.engine.input.events.CharEvent;
@@ -61,7 +62,7 @@
  * In addition to raw keyboard and mouse input, the system handles Bind Buttons and Bind Axis, which can be mapped to
  * one or more inputs.
  */
-@RegisterSystem
+@RegisterSystem(RegisterMode.CLIENT)
 public class InputSystem extends BaseComponentSystem {
 
     @In

engine/src/main/java/org/terasology/engine/logic/chat/ChatSystem.java

@@ -50,7 +50,9 @@ public class ChatSystem extends BaseComponentSystem {
 
     @Override
     public void initialise() {
-        overlay = nuiManager.addOverlay(NotificationOverlay.ASSET_URI, NotificationOverlay.class);
+        if (nuiManager != null) {
+            overlay = nuiManager.addOverlay(NotificationOverlay.ASSET_URI, NotificationOverlay.class);
+        }
     }
 
     @ReceiveEvent(components = ClientComponent.class)

engine/src/main/java/org/terasology/engine/logic/console/ConsoleSystem.java

@@ -8,13 +8,13 @@
 import org.terasology.engine.entitySystem.systems.BaseComponentSystem;
 import org.terasology.engine.entitySystem.systems.RegisterMode;
 import org.terasology.engine.entitySystem.systems.RegisterSystem;
+import org.terasology.engine.input.binds.general.ConsoleButton;
 import org.terasology.engine.logic.console.commandSystem.ConsoleCommand;
 import org.terasology.engine.logic.console.ui.NotificationOverlay;
-import org.terasology.input.ButtonState;
-import org.terasology.engine.input.binds.general.ConsoleButton;
 import org.terasology.engine.network.ClientComponent;
 import org.terasology.engine.registry.In;
 import org.terasology.engine.rendering.nui.NUIManager;
+import org.terasology.input.ButtonState;
 
 @RegisterSystem
 public class ConsoleSystem extends BaseComponentSystem {
@@ -29,16 +29,18 @@ public class ConsoleSystem extends BaseComponentSystem {
 
     @Override
     public void initialise() {
-        overlay = nuiManager.addOverlay(NotificationOverlay.ASSET_URI, NotificationOverlay.class);
-        console.subscribe((Message message) -> {
-            if (!nuiManager.isOpen("engine:console")) {
-                // make sure the message isn't already shown in the chat overlay
-                if (message.getType() != CoreMessageType.CHAT && message.getType() != CoreMessageType.NOTIFICATION
-                        || !nuiManager.isOpen("engine:chat")) {
-                    overlay.setVisible(true);
+        if (nuiManager != null) {
+            overlay = nuiManager.addOverlay(NotificationOverlay.ASSET_URI, NotificationOverlay.class);
+            console.subscribe((Message message) -> {
+                if (!nuiManager.isOpen("engine:console")) {
+                    // make sure the message isn't already shown in the chat overlay
+                    if (message.getType() != CoreMessageType.CHAT && message.getType() != CoreMessageType.NOTIFICATION
+                            || !nuiManager.isOpen("engine:chat")) {
+                        overlay.setVisible(true);
+                    }
                 }
-            }
-        });
+            });
+        }
     }
 
     @ReceiveEvent(components = ClientComponent.class, priority = EventPriority.PRIORITY_CRITICAL)

facades/PC/src/main/java/org/terasology/engine/Terasology.java

@@ -23,7 +23,6 @@
 import org.terasology.engine.core.subsystem.config.BindsSubsystem;
 import org.terasology.engine.core.subsystem.headless.HeadlessAudio;
 import org.terasology.engine.core.subsystem.headless.HeadlessGraphics;
-import org.terasology.engine.core.subsystem.headless.HeadlessInput;
 import org.terasology.engine.core.subsystem.headless.HeadlessTimer;
 import org.terasology.engine.core.subsystem.headless.mode.HeadlessStateChangeListener;
 import org.terasology.engine.core.subsystem.headless.mode.StateHeadlessSetup;
@@ -270,8 +269,7 @@ private void populateSubsystems(TerasologyEngineBuilder builder) {
         if (isHeadless) {
             builder.add(new HeadlessGraphics())
                     .add(new HeadlessTimer())
-                    .add(new HeadlessAudio())
-                    .add(new HeadlessInput());
+                    .add(new HeadlessAudio());
         } else {
             EngineSubsystem audio = soundEnabled ? new LwjglAudio() : new HeadlessAudio();
             builder.add(audio)