Mixin Extras, plus a few bugfixes:

- Bumped provided version of Fabric Loader from 0.14.24 to 0.15.0
- Added MixinExtras as a jar-in-jar mod inside of quilt loader.
    - This is an additional library for creating mixins in more expressive and compatible ways.
      For example "@WrapOperation" is a more compatible way of doing "@reDIrect", if you don't need
      to replace the method call in all circumstances.
      For more information please see the MixinExtras wiki page: https://github.com/LlamaLad7/MixinExtras/wiki
    - You can use the system property "-Dloader.disable_builtin_mixin_extras=true" to disable loader's builtin
      version of mixin extras. As such mods that use mixin extras are encouraged to add it as a dependency in their
      quilt.mod.json to make the crash more obvious when a user has disabled it but a mod requires it.
- Re-added a previous fix that was added in 0.18.1-beta.1 and accidently removed in  0.18.1-beta.58:
    - Changed the entrypoint hook to use the old fabric class when running in versions before 1.17.
        - This allows NotEnoughCrashes to redirect our entrypoint

Bug Fixes:

- Fixed QuiltClassPath.getResources not always returning all paths, when multiple mods ship the same file.

build.gradle

@@ -1,3 +1,6 @@
+import net.fabricmc.loom.build.nesting.JarNester
+import org.slf4j.LoggerFactory
+
 buildscript {
 	dependencies {
 		classpath "org.kohsuke:github-api:${project.github_api}"
@@ -75,6 +78,14 @@ configurations {
 	implementation {
 		extendsFrom include
 	}
+
+	development {
+		transitive = false
+	}
+
+	api {
+		extendsFrom development
+	}
 }
 
 dependencies {
@@ -100,6 +111,8 @@ dependencies {
 	include "com.electronwill.night-config:toml:${project.night_config}"
 	api "org.quiltmc:quilt-config:${project.quilt_config}"
 
+	development "io.github.llamalad7:mixinextras-fabric:$mixin_extras"
+
 	// also must update in minecraft AND minecraft test
 	compileOnly "org.quiltmc.chasm:chasm:${project.quilt_chasm}"
 	compileOnly "org.quiltmc.chasm:chassembly:${project.quilt_chasm}"
@@ -136,6 +149,7 @@ processResources {
 	inputs.property "asm_tree", project.asm
 	inputs.property "asm_util", project.asm
 	inputs.property "quilt_config", project.quilt_config
+	inputs.property "mixin_extras", project.mixin_extras
 
 	filesMatching("quilt.mod.json") {
 		expand "version": project.version
@@ -154,6 +168,7 @@ processResources {
 			"asm_tree": project.asm,
 			"asm_util": project.asm,
 			"quilt_config": project.quilt_config,
+			"mixin_extras": project.mixin_extras,
 		)
 	}
 }
@@ -232,6 +247,10 @@ task fatJar(type: ShadowJar, dependsOn: getSat4jAbout) {
 	exclude 'sat4j.version'
 	exclude 'META-INF/maven/org.ow2.sat4j/*/**'
 
+	doLast {
+		JarNester.nestJars(project.configurations.development.files, archiveFile.get().asFile, LoggerFactory.getLogger("JiJ"))
+	}
+
 	outputs.upToDateWhen { false }
 }
 

gradle.properties

@@ -5,7 +5,7 @@ group = org.quiltmc
 description = The mod loading component of Quilt
 url = https://github.com/quiltmc/quilt-loader
 # Don't forget to change this in QuiltLoaderImpl as well
-quilt_loader = 0.22.1-beta.2
+quilt_loader = 0.22.1-alexlocal.13
 
 # Fabric & Quilt Libraries
 asm = 9.6
@@ -27,3 +27,4 @@ junit_bom = 5.9.3
 proguard_gradle = 7.3.2
 github_api = 1.315
 flexver = 1.1.0
+mixin_extras = 0.3.0

minecraft/minecraft-test/build.gradle

@@ -15,8 +15,8 @@ repositories {
 
 dependencies {
 	testImplementation 'org.junit.jupiter:junit-jupiter:5.8.1'
-	minecraft "com.mojang:minecraft:23w12a"
-	mappings "org.quiltmc:quilt-mappings:23w12a+build.1:intermediary-v2"
+	minecraft "com.mojang:minecraft:1.20.2"
+	mappings "org.quiltmc:quilt-mappings:1.20.2+build.1:intermediary-v2"
 
 
 	implementation project(":minecraft")

minecraft/minecraft-test/src/main/java/net/fabricmc/minecraft/test/mixin/MixinGrassBlock.java

@@ -1,19 +1,35 @@
 package net.fabricmc.minecraft.test.mixin;
 
+import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
+import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
+import com.llamalad7.mixinextras.sugar.Local;
+
+import net.minecraft.block.Blocks;
 import net.minecraft.block.BlockState;
 import net.minecraft.block.Fertilizable;
 import net.minecraft.block.GrassBlock;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.random.RandomGenerator;
 import net.minecraft.world.World;
+import net.minecraft.world.WorldView;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Overwrite;
+import org.spongepowered.asm.mixin.injection.At;
 
 @Mixin(GrassBlock.class)
 public abstract class MixinGrassBlock implements Fertilizable {
 	@Override
 	@Overwrite
-	public boolean canGrow(World world, RandomGenerator random, BlockPos pos, BlockState state) {
+	public boolean canFertilize(World world, RandomGenerator random, BlockPos pos, BlockState state) {
 		return false;
 	}
+
+    @WrapOperation(method = "isFertilizable", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/WorldView;getBlockState(Lnet/minecraft/util/math/BlockPos;)Lnet/minecraft/block/BlockState;"))
+    private BlockState testMixinExtras(WorldView instance, BlockPos pos, Operation<BlockState> original, @Local(argsOnly = true) BlockState state) {
+        if (state == null) {
+            return Blocks.AIR.getDefaultState();
+        }
+
+        return original.call(instance, pos);
+    }
 }

minecraft/minecraft-test/src/main/java/net/fabricmc/minecraft/test/mixin/MixinGuiMain.java

@@ -23,6 +23,7 @@
 
 import net.fabricmc.minecraft.test.server_only.TestMixinGuiHelper;
 
+import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.screen.Screen;
 import net.minecraft.client.gui.screen.TitleScreen;
 import net.minecraft.client.util.math.MatrixStack;
@@ -35,8 +36,8 @@ protected MixinGuiMain(Text textComponent_1) {
 	}
 
 	@Inject(method = "render", at = @At("RETURN"))
-	public void render(MatrixStack matrixStack, int mouseX, int mouseY, float delta, CallbackInfo info) {
-		this.textRenderer.draw(matrixStack, "Quilt Test Mod", 2, this.height - 30, -1);
+	public void render(GuiGraphics graphics, int mouseX, int mouseY, float delta, CallbackInfo info) {
+	    graphics.drawShadowedText(textRenderer, "Quilt Test Mod", 2, this.height - 30, -1);
 		TestMixinGuiHelper.help();
 	}
 }

minecraft/minecraft-test/src/test/java/JunitTest.java

@@ -1,3 +1,13 @@
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import com.llamalad7.mixinextras.MixinExtrasBootstrap;
+
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.quiltmc.loader.api.QuiltLoader;
+
 import net.fabricmc.loader.api.FabricLoader;
 
 import net.minecraft.Bootstrap;
@@ -7,17 +17,13 @@
 import net.minecraft.item.Items;
 import net.minecraft.registry.Registries;
 import net.minecraft.util.Identifier;
-import org.junit.jupiter.api.BeforeAll;
-import org.junit.jupiter.api.Test;
-import org.quiltmc.loader.api.QuiltLoader;
-
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertFalse;
+import net.minecraft.util.math.BlockPos;
 
 public class JunitTest {
 	@BeforeAll
 	public static void setup() {
 		System.out.println("Initializing Minecraft");
+		MixinExtrasBootstrap.init();
 		SharedConstants.createGameVersion();
 		Bootstrap.initialize();
 		System.out.println("Minecraft initialized");
@@ -35,10 +41,19 @@ public void testItems() {
 	public void testMixin() {
 		// MixinGrassBlock sets canGrow to false
 		GrassBlock grassBlock = (GrassBlock) Blocks.GRASS_BLOCK;
-		boolean canGrow = grassBlock.canGrow(null, null, null, null);
+		boolean canGrow = grassBlock.canFertilize(null, null, null, null);
 		assertFalse(canGrow);
 	}
 
+	@Test
+	public void testMixinExtras() {
+		// MixinGrassBlock sets isFertilizable to true
+		GrassBlock grassBlock = (GrassBlock) Blocks.GRASS_BLOCK;
+		System.out.println("Grass Block = " + grassBlock);
+		boolean isFertilizable = grassBlock.isFertilizable(null, BlockPos.ORIGIN, null);
+		assertTrue(isFertilizable);
+	}
+
 	@Test
 	@SuppressWarnings("deprecation")
 	public void testAccessLoader() {

minecraft/src/main/java/org/quiltmc/loader/impl/game/minecraft/patch/EntrypointPatch.java

@@ -51,6 +51,7 @@
 
 
 public class EntrypointPatch extends GamePatch {
+	/* QUILT */private static final VersionPredicate BEFORE_1_17 = createVersionPredicate("<=1.17");
 	private static final VersionPredicate VERSION_1_19_4 = createVersionPredicate(">=1.19.4-");
 
 	private final MinecraftGameProvider gameProvider;
@@ -60,7 +61,16 @@ public EntrypointPatch(MinecraftGameProvider gameProvider) {
 	}
 
 	private void finishEntrypoint(EnvType type, ListIterator<AbstractInsnNode> it) {
-		String methodName = String.format("start%s", type == EnvType.CLIENT ? "Client" : "Server");
+		String sideName = type == EnvType.CLIENT ? "Client" : "Server";
+		/* START OF QUILT */
+		// Compatibility for older fabric mods which redirect our start hook
+		if (BEFORE_1_17.test(getGameVersion())) {
+			String internalName = "net/fabricmc/loader/entrypoint/minecraft/hooks/Entrypoint" + sideName;
+			it.add(new MethodInsnNode(Opcodes.INVOKESTATIC, internalName, "start", "(Ljava/io/File;Ljava/lang/Object;)V", false));
+			return;
+		}
+		/* END OF QUILT */
+		String methodName = String.format("start%s", sideName);
 		it.add(new MethodInsnNode(Opcodes.INVOKESTATIC, Hooks.INTERNAL_NAME, methodName, "(Ljava/io/File;Ljava/lang/Object;)V", false));
 	}
 

src/main/java/org/quiltmc/loader/impl/QuiltLoaderImpl.java

@@ -129,7 +129,7 @@ public final class QuiltLoaderImpl {
 
 	public static final int ASM_VERSION = Opcodes.ASM9;
 
-	public static final String VERSION = "0.22.1-beta.2";
+	public static final String VERSION = "0.22.1-alexlocal.13";
 	public static final String MOD_ID = "quilt_loader";
 	public static final String DEFAULT_MODS_DIR = "mods";
 	public static final String DEFAULT_CACHE_DIR = ".cache";

src/main/java/org/quiltmc/loader/impl/filesystem/QuiltClassPath.java

@@ -702,10 +702,11 @@ public int getEqualPathIndex(Path in) {
 
 		public Path get(String key) {
 			for (Path value : values) {
+				Path compare = value;
 				if (value instanceof OverlappingPath) {
-					value = ((OverlappingPath) value).paths[0];
+					compare = ((OverlappingPath) value).paths[0];
 				}
-				if (isEqual(key, value)) {
+				if (isEqual(key, compare)) {
 					return value;
 				}
 			}

src/main/java/org/quiltmc/loader/impl/gui/QuiltForkComms.java

@@ -84,22 +84,17 @@ public static QuiltForkComms connect(File medium, Consumer<LoaderValue> handler)
 		if (overridePort == null) {
 			File portFile = new File(medium.toString() + ".port");
 			File readyFile = new File(medium.toString() + ".ready");
-			File classpath = new File(medium.toString() + ".cp");
+			File classpathFile = new File(medium.toString() + ".cp");
 			if (portFile.exists()) {
 				portFile.delete();
 			}
 			if (readyFile.exists()) {
 				readyFile.delete();
 			}
-			if (classpath.exists()) {
-				classpath.delete();
+			if (classpathFile.exists()) {
+				classpathFile.delete();
 			}
 
-			// Write classpath to file
-			Files.write(classpath.toPath(), System.getProperty("java.class.path")
-				.replace(" ", "\" \"")
-				.getBytes(StandardCharsets.UTF_8));
-
 			List<String> commands = new ArrayList<>();
 			commands.add(System.getProperty("java.home") + File.separator + "bin" + File.separator + "java");
 			// GC chosen to minimise real memory usage, and maximise returning memory to the OS
@@ -109,7 +104,15 @@ public static QuiltForkComms connect(File medium, Consumer<LoaderValue> handler)
 			commands.add("-XX:MaxHeapFreeRatio=10");
 			commands.add("-XX:MinHeapFreeRatio=2");
 			commands.add("-cp");
-			commands.add("@" + classpath.toString());
+			String classpath = System.getProperty("java.class.path").replace(" ", "\" \"");
+			if (System.getProperty("java.version").startsWith("1.")) {
+				// Java 8 and below doesn't support @-file expansion
+				// I'm not sure exactly which version added @-file expansion, but it works in java 11
+				commands.add(classpath);
+			} else {
+				Files.write(classpathFile.toPath(), classpath.getBytes(StandardCharsets.UTF_8));
+				commands.add("@" + classpathFile.toString());
+			}
 			commands.add(QuiltForkServerMain.class.getName());
 
 			commands.add("--file");

src/main/java/org/quiltmc/loader/impl/launch/knot/Knot.java

@@ -282,7 +282,7 @@ public void addToClassPath(Path path, String... allowedPrefixes) {
 
 	@Override
 	public void addToClassPath(Path path, ModContainer mod, URL origin, String... allowedPrefixes) {
-		Log.debug(LogCategory.KNOT, "Adding " + path + " to classpath.");
+		Log.debug(LogCategory.KNOT, "Adding " + path.getFileSystem() + " " + path + " to classpath.");
 
 		try {
 			URL url = UrlUtil.asUrl(path);

src/main/java/org/quiltmc/loader/impl/plugin/quilt/StandardQuiltPlugin.java

@@ -56,6 +56,7 @@
 import org.quiltmc.loader.api.plugin.solver.LoadOption;
 import org.quiltmc.loader.api.plugin.solver.ModLoadOption;
 import org.quiltmc.loader.api.plugin.solver.RuleContext;
+import org.quiltmc.loader.impl.QuiltLoaderImpl;
 import org.quiltmc.loader.impl.filesystem.QuiltJoinedFileSystem;
 import org.quiltmc.loader.impl.game.GameProvider;
 import org.quiltmc.loader.impl.game.GameProvider.BuiltinMod;
@@ -78,6 +79,7 @@
 public class StandardQuiltPlugin extends BuiltinQuiltPlugin {
 
 	public static final boolean DEBUG_PRINT_STATE = Boolean.getBoolean(SystemProperties.DEBUG_MOD_SOLVING);
+	public static final boolean DISBALE_BUILTIN_MIXIN_EXTRAS = Boolean.getBoolean(SystemProperties.DISABLE_BUILTIN_MIXIN_EXTRAS);
 
 	private QuiltOverrides overrides;
 	private final Map<String, OptionalModIdDefintion> modDefinitions = new HashMap<>();
@@ -273,6 +275,16 @@ private ModLoadOption[] scan0(Path root, QuiltLoaderIcon fileIcon, ModLocation l
 				}
 
 				PluginGuiTreeNode jarNode = guiNode.addChild(QuiltLoaderText.of(jar), SortOrder.ALPHABETICAL_ORDER);
+				if (DISBALE_BUILTIN_MIXIN_EXTRAS) {
+					if (QuiltLoaderImpl.MOD_ID.equals(meta.id())) {
+						if (inner.toString().startsWith("/META-INF/jars/mixinextras-")) {
+							Log.info(LogCategory.GENERAL, "Disabling loader's builtin mixin extras library due to command line flag");
+							jarNode.addChild(QuiltLoaderText.translate("mixin_extras.disabled"));
+							jarNode.mainIcon(QuiltLoaderGui.iconDisabled());
+							continue;
+						}
+					}
+				}
 				context().addFileToScan(inner, jarNode, false);
 			}
 
@@ -379,6 +391,12 @@ public void onLoadOptionAdded(LoadOption option) {
 					replace(override.fuzzy, override.overrides.breakOverrides, breaks);
 				}
 
+				if (QuiltLoaderImpl.MOD_ID.equals(metadata.id())) {
+					if (DISBALE_BUILTIN_MIXIN_EXTRAS) {
+						depends.removeIf(dep -> dep instanceof ModDependency.Only && ((ModDependency.Only) dep).id().id().equals("mixinextras"));
+					}
+				}
+
 				for (ModDependency dep : depends) {
 					if (!dep.shouldIgnore()) {
 						ctx.addRule(createModDepLink(context().manager(), ctx, mod, dep));

src/main/java/org/quiltmc/loader/impl/util/SystemProperties.java

@@ -92,6 +92,7 @@ private SystemProperties() {}
 	public static final String DEBUG_DUMP_FILESYSTEM_CONTENTS = "loader.debug.filesystem.dump_contents";
 	public static final String ALWAYS_DEFER_FILESYSTEM_OPERATIONS = "loader.workaround.defer_all_filesystem_operations";
 	public static final String DISABLE_QUILT_CLASS_PATH_CUSTOM_TABLE = "loader.quilt_class_path.disable_custom_table";
+	public static final String DISABLE_BUILTIN_MIXIN_EXTRAS = "loader.disable_builtin_mixin_extras";
 
 	// ##############
 	// # Validation #

src/main/resources/changelog/0.22.1.txt

@@ -2,7 +2,20 @@ Features:
 
 - Changed the solver pre-processor to include it's state in the crash report when it encounters a contradiction.
     - This makes it easy for a loader developer to reproduce the solver state in order to debug it.
+- Bumped provided version of Fabric Loader from 0.14.24 to 0.15.0
+- Added MixinExtras as a jar-in-jar mod inside of quilt loader.
+    - This is an additional library for creating mixins in more expressive and compatible ways.
+      For example "@WrapOperation" is a more compatible way of doing "@Redirect", if you don't need
+      to replace the method call in all circumstances.
+      For more information please see the MixinExtras wiki page: https://github.com/LlamaLad7/MixinExtras/wiki
+    - You can use the system property "-Dloader.disable_builtin_mixin_extras=true" to disable loader's builtin
+      version of mixin extras. As such mods that use mixin extras are encouraged to add it as a dependency in their
+      quilt.mod.json to make the crash more obvious when a user has disabled it but a mod requires it.
+- Re-added a previous fix that was added in 0.18.1-beta.1 and accidently removed in  0.18.1-beta.58:
+    - Changed the entrypoint hook to use the old fabric class when running in versions before 1.17.
+        - This allows NotEnoughCrashes to redirect our entrypoint
 
 Bug Fixes:
 
 - Fixed a solver pre-processor bug where chooseBasedOnOnly didn't check for new constants, resulting in later contradictions.
+- Fixed QuiltClassPath.getResources not always returning all paths, when multiple mods ship the same file.

src/main/resources/lang/quilt_loader.properties

@@ -21,6 +21,7 @@ tab.file_list=Files
 tab.mod_list=Mods
 msg.load_state=Mod loading state (for debugging - this means it worked!)
 msg.load_state.warns=Mod loading state (for debugging - this means it worked!)\n%s warnings.
+mixin_extras.disabled=Mixin Extras disabled by -Dloader.disable_builtin_mixin_extras=true
 # Buttons
 button.view_file=View %s
 button.edit_file=Edit %s

src/main/resources/quilt.mod.json

@@ -20,10 +20,13 @@
     },
     "intermediate_mappings": "net.fabricmc:intermediary",
     "provides": [
-      {
-        "id": "fabricloader",
-        "version": "0.14.24"
-      }
-    ]
+        {
+          "id": "fabricloader",
+          "version": "0.15.0"
+        }
+      ],
+      "depends": [
+        "mixinextras"
+      ]
   }
 }