Add IModListReadyCallback

Technici4n · Apr 14, 2024 · 76b3c4d · 76b3c4d
1 parent 1c8c324
commit 76b3c4d
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diff --git a/loader/src/main/java/net/neoforged/fml/IModListReadyCallback.java b/loader/src/main/java/net/neoforged/fml/IModListReadyCallback.java
@@ -0,0 +1,14 @@
+package net.neoforged.fml;
+
+import java.util.ServiceLoader;
+
+/**
+ * Callback invoked after {@link ModContainer}s are created and the {@link ModList} is populated,
+ * but before mods are constructed.
+ *
+ * <p>Instances are loaded via {@link ServiceLoader} from GAME and upper layers.
+ */
+@FunctionalInterface
+public interface IModListReadyCallback {
+    void onModListReady(ModList modList);
+}
diff --git a/loader/src/main/java/net/neoforged/fml/ModLoader.java b/loader/src/main/java/net/neoforged/fml/ModLoader.java
@@ -17,6 +17,7 @@
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
+import java.util.ServiceLoader;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionException;
 import java.util.concurrent.Executor;
@@ -189,6 +190,12 @@ public void gatherAndInitializeMods(final ModWorkManager.DrivenExecutor syncExec
         modList.setLoadedMods(modContainers);
         this.modList = modList;
 
+        runInitTask("Mod Initialization Callbacks", syncExecutor, periodicTask, () -> {
+            for (var callback : ServiceLoader.load(FMLLoader.getGameLayer(), IModListReadyCallback.class)) {
+                callback.onModListReady(modList);
+            }
+        });
+
         constructMods(syncExecutor, parallelExecutor, periodicTask);
     }