CoreMods 5.2.0

Full Changelog:
https://gist.github.com/Jonathing/c3ad28b2a048ac839a7baba5417ee870

The key features are:
- ES6 language support
- Thoroughly updated ASMAPI, with full documentation
- Bug fixes (some optional for backwards-compatibility)
- Partial internal code cleanup

Author: Jonathing

README.md

@@ -1,13 +1,23 @@
 # CoreMods
 
-New JavaScript based system for implementing CoreMods.
+CoreMods is a JavaScript-based system that acts as a wrapper around ObjectWeb ASM.
 
-Why?
+## Purpose
 
-Because it means that it's a lot easier to manage the lifecycle correctly. We can isolate
-CoreMod logic to the proper ClassLoading contexts without effort on the part of the Modder.
+CoreMods need to be sandboxed, or otherwise isolated, in their own environments so that they are not able to cause early
+class-loading. They transform classes as only as they are loaded and do not have access to objects outside of the
+sandbox given to them. This helps prevent issues that would otherwise arise from CoreMods written traditionally in Java.
 
-It hopefully also communicates that CoreMods are strictly arms-length : they operate on 
-classes as they load _only_ - changing structures and behaviours through that means.
+Since CoreMods integrates with ModLauncher's transformation system, it is easier to manage the lifecycle as CoreMods is
+only responsible for managing the transformation as ModLauncher is instead the one responsible for providing the class
+loading system.
 
-This is connected to Forge and FML through the CoreMod SPI being implemented in new Forge. 
+## Usage
+
+CoreMods are JavaScript files that are sandboxed by the limitations provided within the CoreMod engine. It is only able
+to access a limited set of classes and packages. ASMAPI, included within CoreMods, exists to provide several helpful
+tools for writing CoreMods. You can view this class yourself to see its usages, or you can find examples of it in other
+CoreMods.
+
+The best way to find examples for CoreMods is to look at Forge itself, since it includes complex examples that utilize
+much of the functionality within the sandbox.

build.gradle

@@ -39,11 +39,15 @@ dependencies {
     testImplementation('org.powermock:powermock-core:2.0.+')
     testImplementation('org.hamcrest:hamcrest-core:2.2')
     testImplementation('org.apache.logging.log4j:log4j-core:2.19.0')
+    testImplementation(libs.modlauncher)
+    testImplementation(libs.forgespi)
+    testImplementation(libs.unsafe)
     testCompileOnly('org.jetbrains:annotations:21.0.1')
     testRuntimeOnly('org.junit.jupiter:junit-jupiter-engine:5.7.+')
     testRuntimeOnly(project(':coremods-test-jar'))
-    
+
     compileOnly(libs.modlauncher)
+    compileOnly(libs.securemodules)
     implementation(libs.log4j.api)
     api(libs.bundles.asm)
     compileOnly(libs.forgespi)

coremods-test/build.gradle

@@ -41,6 +41,9 @@ dependencies {
     testImplementation(project(':coremods-test-jar'))
     testImplementation(libs.junit.api)
     testImplementation(libs.log4j.api)
+    testImplementation(libs.modlauncher)
+    testImplementation(libs.forgespi)
+    testImplementation(libs.unsafe)
     testRuntimeOnly(libs.bundles.junit.runtime)
     testCompileOnly(libs.nulls)
 }

coremods-test/src/test/java/module-info.java

@@ -3,10 +3,15 @@
  * SPDX-License-Identifier: LGPL-2.1-only
  */
 module net.minecraftforge.coremods.test {
+    requires cpw.mods.modlauncher;
     requires net.minecraftforge.forgespi;
-	requires org.junit.jupiter.api;
-	requires org.apache.logging.log4j;
-	requires cpw.mods.modlauncher;
-	requires org.objectweb.asm.tree;
-	requires org.jetbrains.annotations;
-}
+    requires net.minecraftforge.coremod;
+    requires org.junit.jupiter.api;
+    requires org.apache.logging.log4j;
+    requires org.objectweb.asm.tree;
+    requires org.jetbrains.annotations;
+    requires net.minecraftforge.unsafe;
+
+    provides cpw.mods.modlauncher.api.ITransformationService
+        with net.minecraftforge.coremod.test.TestTransformerService;
+}

coremods-test/src/test/java/net/minecraftforge/coremod/test/CoreModTest.java

@@ -6,9 +6,12 @@
 
 import net.minecraftforge.coremod.CoreModEngine;
 
+import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 import java.util.stream.Collectors;
 
+import net.minecraftforge.forgespi.coremod.ICoreModFile;
+import net.minecraftforge.unsafe.UnsafeHacks;
 import org.junit.jupiter.api.Test;
 import org.objectweb.asm.tree.ClassNode;
 
@@ -18,11 +21,13 @@ public class CoreModTest {
 
     @SuppressWarnings("unchecked")
     @Test
-    void testJSLoading() {
+    void testJSLoading() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
         final CoreModEngine coreModEngine = new CoreModEngine();
-        coreModEngine.loadCoreMod(new JSFileLoader("src/test/javascript/testcoremod.js"));
-        coreModEngine.loadCoreMod(new JSFileLoader("src/test/javascript/testcore2mod.js"));
-        coreModEngine.loadCoreMod(new JSFileLoader("src/test/javascript/testdata.js"));
+        var loadCoreMod = coreModEngine.getClass().getMethod("loadCoreMod", ICoreModFile.class);
+        UnsafeHacks.setAccessible(loadCoreMod);
+        loadCoreMod.invoke(coreModEngine, new JSFileLoader("src/test/javascript/testcoremod.js"));
+        loadCoreMod.invoke(coreModEngine, new JSFileLoader("src/test/javascript/testcore2mod.js"));
+        loadCoreMod.invoke(coreModEngine, new JSFileLoader("src/test/javascript/testdata.js"));
         final List<ITransformer<?>> iTransformers = coreModEngine.initializeCoreMods();
         iTransformers.forEach(t -> {
             System.out.printf("targ: %s\n", t.targets().stream().map(ITransformer.Target::getClassName).collect(Collectors.joining(",")));

coremods-test/src/test/java/net/minecraftforge/coremod/test/TestLaunchTransformer.java

@@ -9,8 +9,11 @@
 import cpw.mods.modlauncher.api.ITransformer;
 import net.minecraftforge.coremod.CoreModEngine;
 
+import net.minecraftforge.forgespi.coremod.ICoreModFile;
+import net.minecraftforge.unsafe.UnsafeHacks;
 import org.junit.jupiter.api.Test;
 
+import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 import java.util.concurrent.Callable;
 
@@ -21,14 +24,16 @@ public static List<ITransformer<?>> getTransformers() {
     }
 
     @Test
-    public void testCoreModLoading() {
+    public void testCoreModLoading() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
         System.setProperty("test.harness", "out/production/classes,out/test/classes,out/testJars/classes,build/classes/java/main,build/classes/java/test,build/classes/java/testJars");
         System.setProperty("test.harness.callable", "net.minecraftforge.coremod.test.TestLaunchTransformer$Callback");
 
-        cme.loadCoreMod(new JSFileLoader("src/test/javascript/testcoremod.js"));
-        cme.loadCoreMod(new JSFileLoader("src/test/javascript/testcore2mod.js"));
-        cme.loadCoreMod(new JSFileLoader("src/test/javascript/testmethodcoremod.js"));
-        cme.loadCoreMod(new JSFileLoader("src/test/javascript/testmethodcoreinsert.js"));
+        var loadCoreMod = cme.getClass().getMethod("loadCoreMod", ICoreModFile.class);
+        UnsafeHacks.setAccessible(loadCoreMod);
+        loadCoreMod.invoke(cme, new JSFileLoader("src/test/javascript/testcoremod.js"));
+        loadCoreMod.invoke(cme, new JSFileLoader("src/test/javascript/testcore2mod.js"));
+        loadCoreMod.invoke(cme, new JSFileLoader("src/test/javascript/testmethodcoremod.js"));
+        loadCoreMod.invoke(cme, new JSFileLoader("src/test/javascript/testmethodcoreinsert.js"));
 
         Launcher.main("--version", "1.0", "--launchTarget", "testharness");
     }

coremods-test/src/test/javascript/testcore2mod.js

@@ -1,3 +1,7 @@
+/*
+ * Copyright (c) Forge Development LLC
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
 var core2fn = function() {
     print("Core2 function!");
 }

coremods-test/src/test/javascript/testcoremod.js

@@ -1,3 +1,7 @@
+/*
+ * Copyright (c) Forge Development LLC
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
 function initializeCoreMod() {
     print("Hello");
     Java.type('net.minecraftforge.coremod.api.ASMAPI').loadFile('testcoremod2.js')

coremods-test/src/test/javascript/testcoremod2.js

@@ -1,3 +1,7 @@
+/*
+ * Copyright (c) Forge Development LLC
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
 function moreFunctions() {
     print("Poopy from more functions!");
 }

coremods-test/src/test/javascript/testdata.js

@@ -1,3 +1,7 @@
+/*
+ * Copyright (c) Forge Development LLC
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
 function initializeCoreMod() {
     var data = Java.type('net.minecraftforge.coremod.api.ASMAPI').loadData('testdata.json')
     print('Loaded JSON: ' + JSON.stringify(data))