Load default biomes into registry at earliest convenience, then load custom biomes later.

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/WorldEditPlugin.java

@@ -236,18 +236,18 @@ public class WorldEditPlugin extends JavaPlugin {
         // datapacks aren't loaded until just before the world is, and bukkit has no event for this
         // so the earliest we can do this is in WorldInit
         setupTags();
-        setupBiomes(); // FAWE - load biomes later
+        setupBiomes(); // FAWE - load biomes later. Initialize biomes twice to allow for the registry to be present for
+        // plugins requiring WE biomes during startup, as well as allowing custom biomes loaded later on to be present in WE.
         WorldEdit.getInstance().getEventBus().post(new PlatformReadyEvent(platform));
     }
 
     @SuppressWarnings({"deprecation", "unchecked"})
     private void initializeRegistries() {
-        /* // FAWE start - move Biomes to their own method
-        for (Biome biome : Biome.values()) {
-            String lowerCaseBiomeName = biome.name().toLowerCase(Locale.ROOT);
-            BiomeType.REGISTRY.register("minecraft:" + lowerCaseBiomeName, new BiomeType("minecraft:" + lowerCaseBiomeName));
-        }
+        // FAWE start - move Biomes to their own method. Initialize biomes twice to allow for the registry to be present for
+        // plugins requiring WE biomes during startup, as well as allowing custom biomes loaded later on to be present in WE.
+        setupBiomes();
         // FAWE end
+        /*
 
         // Block & Item
         for (Material material : Material.values()) {
@@ -311,14 +311,11 @@ public class WorldEditPlugin extends JavaPlugin {
     // FAWE start
     private void setupBiomes() {
         if (this.adapter.value().isPresent()) {
-            // We don't know which world is the one with the data packs
-            // so we just loop over them. Doesn't hurt
-            for (org.bukkit.World world : Bukkit.getWorlds()) {
-                // cast is needed, thanks to raw types <3
-                for (final NamespacedKey biome : ((BukkitImplAdapter<?>) adapter.value().get()).getRegisteredBiomes(world)) {
-                    if (BiomeType.REGISTRY.get(biome.toString()) == null) { // only register once
-                        BiomeType.REGISTRY.register(biome.toString(), new BiomeType(biome.toString()));
-                    }
+            // Biomes are stored globally in the server. Registries are not kept per-world in Minecraft.
+            // The WorldServer get-registries method simply delegates to the MinecraftServer method.
+            for (final NamespacedKey biome : ((BukkitImplAdapter<?>) adapter.value().get()).getRegisteredBiomes()) {
+                if (BiomeType.REGISTRY.get(biome.toString()) == null) { // only register once
+                    BiomeType.REGISTRY.register(biome.toString(), new BiomeType(biome.toString()));
                 }
             }
         } else {

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/BukkitImplAdapter.java

@@ -311,10 +311,9 @@ public interface BukkitImplAdapter<T> extends IBukkitAdapter {
     /**
      * Returns an iterable of all biomes known to the server.
      *
-     * @param world the world to load the registered biomes from.
      * @return all biomes known to the server.
      */
-    default Iterable<NamespacedKey> getRegisteredBiomes(World world) {
+    default Iterable<NamespacedKey> getRegisteredBiomes() {
         return Arrays.stream(Biome.values())
                 .map(Keyed::getKey)
                 .collect(Collectors.toList());