fix /reload

src/main/java/net/wovenmc/woven/impl/tags/WovenTagsImpl.java

@@ -48,7 +48,7 @@
 @ApiStatus.Internal
 public class WovenTagsImpl implements WovenTags {
 	public static final WovenTagsImpl INSTANCE = new WovenTagsImpl();
-	public static DynamicRegistryManager.Impl registryManager;
+	public static DynamicRegistryManager registryManager;
 
 	private final Map<RegistryKey<? extends Registry<?>>, TagGroup<?>> tagGroupMap = new HashMap<>();
 
@@ -76,7 +76,7 @@ public <T> Tag<T> get(RegistryKey<Registry<T>> registryKey, Identifier id) {
 	@SuppressWarnings({ "rawtypes", "unchecked" })
 	public List<TagLoaderInfo<?>> prepare(ResourceManager manager) {
 		tagGroupMap.clear();
-		Map<? extends RegistryKey<? extends Registry<?>>, ? extends SimpleRegistry<?>> dynRegistries = ((DynamicRegistryManagerImplAccessor) (Object) registryManager)
+		Map<? extends RegistryKey<? extends Registry<?>>, ? extends SimpleRegistry<?>> dynRegistries = ((DynamicRegistryManagerImplAccessor) registryManager)
 				.getRegistries();
 		List<TagLoaderInfo<?>> loaderList = new ArrayList<>();
 

src/main/java/net/wovenmc/woven/mixin/tags/MinecraftServerMixin.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2020 WovenMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.wovenmc.woven.mixin.tags;
+
+import java.util.concurrent.CompletableFuture;
+
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import net.minecraft.resource.ServerResourceManager;
+import net.minecraft.server.MinecraftServer;
+import net.wovenmc.woven.impl.tags.WovenTagsImpl;
+
+@Mixin(MinecraftServer.class)
+public class MinecraftServerMixin {
+	@Shadow
+	@Final
+	private ServerResourceManager serverResourceManager;
+
+	@Inject(at = @At("HEAD"), method = "reloadResources")
+	private void storeServerDynamicRegManager(CallbackInfoReturnable<CompletableFuture<Void>> cir) {
+		WovenTagsImpl.registryManager = ((MinecraftServer) (Object) this).getRegistryManager();
+	}
+}

src/main/resources/woven-tags.mixins.json

@@ -6,6 +6,7 @@
     "DynamicRegistryManagerImplAccessor",
     "DynamicRegistryManagerMixin",
     "FluidTagsAccessor",
+    "MinecraftServerMixin",
     "TagManagerLoaderMixin"
   ]
 }