Fix platform registration, config setup

worldedit-core/src/main/java/com/sk89q/worldedit/world/registry/LegacyMapper.java

@@ -43,6 +43,8 @@ import java.util.logging.Logger;
 
 import javax.annotation.Nullable;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
 public class LegacyMapper {
 
     private static final Logger log = Logger.getLogger(LegacyMapper.class.getCanonicalName());
@@ -100,6 +102,7 @@ public class LegacyMapper {
             try {
                 String id = itemEntry.getKey();
                 ItemType type = ItemTypes.get(itemEntry.getValue());
+                checkNotNull(type);
                 itemToStringMap.put(type, id);
                 stringToItemMap.put(id, type);
             } catch (Exception e) {

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeAdapter.java

@@ -134,8 +134,10 @@ public final class ForgeAdapter {
                     .collect(Collectors.toList()));
         }
         if (property instanceof net.minecraft.state.EnumProperty) {
+            // Note: do not make x.getName a method reference.
+            // It will cause runtime bootstrap exceptions.
             return new EnumProperty(property.getName(), ((net.minecraft.state.EnumProperty<?>) property).getAllowedValues().stream()
-                    .map(IStringSerializable::getName)
+                    .map(x -> x.getName())
                     .collect(Collectors.toList()));
         }
         return new IPropertyAdapter<>(property);

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/ForgeWorldEdit.java

@@ -36,26 +36,34 @@ import com.sk89q.worldedit.world.block.BlockType;
 import com.sk89q.worldedit.world.entity.EntityType;
 import com.sk89q.worldedit.world.item.ItemCategory;
 import com.sk89q.worldedit.world.item.ItemType;
+import net.minecraft.client.Minecraft;
 import net.minecraft.entity.player.EntityPlayerMP;
 import net.minecraft.tags.BlockTags;
 import net.minecraft.tags.ItemTags;
 import net.minecraft.util.ResourceLocation;
 import net.minecraft.world.World;
+import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.event.CommandEvent;
 import net.minecraftforge.event.entity.player.PlayerInteractEvent;
 import net.minecraftforge.event.entity.player.PlayerInteractEvent.LeftClickEmpty;
 import net.minecraftforge.eventbus.api.Event;
+import net.minecraftforge.eventbus.api.IEventBus;
 import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.DistExecutor;
 import net.minecraftforge.fml.ModContainer;
 import net.minecraftforge.fml.ModLoadingContext;
+import net.minecraftforge.fml.SidedProvider;
 import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.event.lifecycle.FMLClientSetupEvent;
 import net.minecraftforge.fml.event.lifecycle.FMLCommonSetupEvent;
+import net.minecraftforge.fml.event.lifecycle.FMLLoadCompleteEvent;
 import net.minecraftforge.fml.event.server.FMLServerAboutToStartEvent;
 import net.minecraftforge.fml.event.server.FMLServerStartedEvent;
 import net.minecraftforge.fml.event.server.FMLServerStoppingEvent;
 import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
+import net.minecraftforge.fml.loading.FMLCommonLaunchHandler;
+import net.minecraftforge.fml.loading.FMLLoader;
 import net.minecraftforge.fml.loading.FMLPaths;
 import net.minecraftforge.registries.ForgeRegistries;
 import org.apache.logging.log4j.LogManager;
@@ -92,13 +100,15 @@ public class ForgeWorldEdit {
     public ForgeWorldEdit() {
         inst = this;
 
-        FMLJavaModLoadingContext.get().getModEventBus().addListener(this::init);
+        IEventBus modBus = FMLJavaModLoadingContext.get().getModEventBus();
+        modBus.addListener(this::init);
+        modBus.addListener(this::load);
 
         MinecraftForge.EVENT_BUS.register(ThreadSafeCache.getInstance());
         MinecraftForge.EVENT_BUS.register(this);
     }
 
-    public void init(FMLCommonSetupEvent event) {
+    private void init(FMLCommonSetupEvent event) {
         this.container = ModLoadingContext.get().getActiveContainer();
 
         // Setup working directory
@@ -111,9 +121,6 @@ public class ForgeWorldEdit {
             }
         }
 
-        config = new ForgeConfiguration(this);
-        config.load();
-
         WECUIPacketHandler.init();
         InternalPacketHandler.init();
         proxy.registerHandlers();
@@ -121,6 +128,14 @@ public class ForgeWorldEdit {
         LOGGER.info("WorldEdit for Forge (version " + getInternalVersion() + ") is loaded");
     }
 
+    private void load(FMLLoadCompleteEvent event) {
+        if (FMLLoader.getDist() == Dist.CLIENT) {
+            // we want to setup platform before we hit the main menu
+            // but this event is async -- so we must delay until the first game loop:
+            Minecraft.getInstance().addScheduledTask(this::setupPlatform);
+        }
+    }
+
     @SubscribeEvent
     public void serverAboutToStart(FMLServerAboutToStartEvent event) {
         if (this.platform != null) {
@@ -128,6 +143,10 @@ public class ForgeWorldEdit {
             WorldEdit.getInstance().getPlatformManager().unregister(platform);
         }
 
+        setupPlatform();
+    }
+
+    private void setupPlatform() {
         this.platform = new ForgePlatform(this);
 
         WorldEdit.getInstance().getPlatformManager().register(platform);
@@ -139,30 +158,43 @@ public class ForgeWorldEdit {
 //        }
 
         setupRegistries();
+
+        config = new ForgeConfiguration(this);
+        config.load();
     }
 
     private void setupRegistries() {
         // Blocks
         for (ResourceLocation name : ForgeRegistries.BLOCKS.getKeys()) {
+            if (BlockType.REGISTRY.get(name.toString()) == null) {
                 BlockType.REGISTRY.register(name.toString(), new BlockType(name.toString(),
                     input -> ForgeAdapter.adapt(ForgeAdapter.adapt(input.getBlockType()).getDefaultState())));
             }
+        }
         // Items
         for (ResourceLocation name : ForgeRegistries.ITEMS.getKeys()) {
+            if (ItemType.REGISTRY.get(name.toString()) == null) {
                 ItemType.REGISTRY.register(name.toString(), new ItemType(name.toString()));
             }
+        }
         // Entities
         for (ResourceLocation name : ForgeRegistries.ENTITIES.getKeys()) {
+            if (EntityType.REGISTRY.get(name.toString()) == null) {
                 EntityType.REGISTRY.register(name.toString(), new EntityType(name.toString()));
             }
+        }
         // Tags
         for (ResourceLocation name : BlockTags.getCollection().getRegisteredTags()) {
+            if (BlockCategory.REGISTRY.get(name.toString()) == null) {
                 BlockCategory.REGISTRY.register(name.toString(), new BlockCategory(name.toString()));
             }
+        }
         for (ResourceLocation name : ItemTags.getCollection().getRegisteredTags()) {
+            if (ItemCategory.REGISTRY.get(name.toString()) == null) {
                 ItemCategory.REGISTRY.register(name.toString(), new ItemCategory(name.toString()));
             }
         }
+    }
 
     @SubscribeEvent
     public void serverStopping(FMLServerStoppingEvent event) {