Reintroduce test mixins & a command that shows non-categorized features

While removed in 029b832 because a lambda was
broken, there is now again a use for this since
a high coverage of all features across all
categories is a nice goal, and this will make it
easy to see if anything gets added in future
snapshots.

src/main/java/net/pixaurora/janerator/TestMixinConfig.java

@@ -0,0 +1,44 @@
+package net.pixaurora.janerator;
+
+import java.util.List;
+import java.util.Set;
+
+import org.jetbrains.annotations.Nullable;
+import org.objectweb.asm.tree.ClassNode;
+import org.quiltmc.loader.api.QuiltLoader;
+import org.spongepowered.asm.mixin.extensibility.IMixinConfigPlugin;
+import org.spongepowered.asm.mixin.extensibility.IMixinInfo;
+
+public class TestMixinConfig implements IMixinConfigPlugin {
+    @Override
+    public void onLoad(String mixinPackage) {
+    }
+
+    @Override
+    public String getRefMapperConfig() {
+        return null;
+    }
+
+    @Override
+    public boolean shouldApplyMixin(String targetClassName, String mixinClassName) {
+        return QuiltLoader.isDevelopmentEnvironment();
+    }
+
+    @Override
+    public void acceptTargets(Set<String> myTargets, Set<String> otherTargets) {
+    }
+
+    @Override
+    @Nullable
+    public List<String> getMixins() {
+        return null;
+    }
+
+    @Override
+    public void preApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+    }
+
+    @Override
+    public void postApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+    }
+}

src/main/java/net/pixaurora/janerator/command/HandpickedFeatureCoverageCommand.java

@@ -0,0 +1,53 @@
+package net.pixaurora.janerator.command;
+
+import com.mojang.brigadier.CommandDispatcher;
+
+import net.minecraft.commands.CommandBuildContext;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.core.RegistryAccess;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.network.chat.Component;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.level.levelgen.feature.ConfiguredFeature;
+import net.pixaurora.janerator.worldgen.feature.HandpickedFeatureCategory;
+
+import static net.minecraft.commands.Commands.literal;
+
+import java.util.List;
+import java.util.stream.Stream;
+
+public class HandpickedFeatureCoverageCommand {
+    public static void register(CommandDispatcher<CommandSourceStack> dispatcher, CommandBuildContext buildContext) {
+        dispatcher.register(
+            literal("report-feature-coverage")
+                .requires(source -> source.hasPermission(2))
+                .requires(CommandSourceStack::isPlayer)
+                .executes(commandContext -> printBlocks(commandContext.getSource()))
+        );
+    }
+
+    public static int printBlocks(CommandSourceStack source) {
+        RegistryAccess registry = source.registryAccess();
+
+        List<ResourceKey<ConfiguredFeature<?, ?>>> coveredFeatures = Stream.of(HandpickedFeatureCategory.values())
+            .flatMap(category -> category.includedFeatures().stream())
+            .toList();
+
+        List<String> missingFeatures = registry.lookupOrThrow(Registries.CONFIGURED_FEATURE).listElementIds()
+            .filter(feature -> !coveredFeatures.contains(feature))
+            .map(ResourceKey::location)
+            .map(ResourceLocation::getPath)
+            .toList();
+
+        int amountMissing = missingFeatures.size();
+
+        source.sendSuccess(() -> Component.literal(String.format("%d features that were found missing from handpicked categories!", amountMissing)), false);
+
+        if (amountMissing > 0) {
+            source.sendSuccess(() -> Component.literal(String.join(", ", missingFeatures)), false);
+        }
+
+        return 1;
+    }
+}

src/main/java/net/pixaurora/janerator/mixin/test/CommandsMixin.java

@@ -0,0 +1,27 @@
+package net.pixaurora.janerator.mixin.test;
+
+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.CallbackInfo;
+
+import com.mojang.brigadier.CommandDispatcher;
+
+import net.minecraft.commands.CommandBuildContext;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.commands.Commands;
+import net.pixaurora.janerator.command.HandpickedFeatureCoverageCommand;
+
+@Mixin(Commands.class)
+public class CommandsMixin {
+    @Shadow
+    @Final
+    private CommandDispatcher<CommandSourceStack> dispatcher;
+
+    @Inject(method = "<init>", at = @At("RETURN"))
+    private void onRegister(Commands.CommandSelection selection, CommandBuildContext buildContext, CallbackInfo ci) {
+        HandpickedFeatureCoverageCommand.register(this.dispatcher, buildContext);
+    }
+}

src/main/resources/janerator.mixins.json

@@ -4,19 +4,19 @@
 	"package": "net.pixaurora.janerator.mixin",
 	"compatibilityLevel": "JAVA_17",
 	"mixins": [
-        "ChunkAccessMixin",
-        "ChunkGeneratorMixin",
-        "ChunkGeneratorsMixin",
-        "ChunkStatusMixin",
-        "LevelChunkSectionMixin",
-        "MinecraftServerMixin",
-        "NoiseBasedChunkGeneratorAccessor",
-        "NoiseBasedChunkGeneratorMixin",
-        "NoiseChunkAccessor",
-        "PlacedFeatureMixin",
-        "ProtoChunkMixin"
-    ],
+		"ChunkAccessMixin",
+		"ChunkGeneratorMixin",
+		"ChunkGeneratorsMixin",
+		"ChunkStatusMixin",
+		"LevelChunkSectionMixin",
+		"MinecraftServerMixin",
+		"NoiseBasedChunkGeneratorAccessor",
+		"NoiseBasedChunkGeneratorMixin",
+		"NoiseChunkAccessor",
+		"PlacedFeatureMixin",
+		"ProtoChunkMixin"
+	],
 	"injectors": {
 		"defaultRequire": 1
 	}
-}
+}

src/main/resources/janerator.test.mixins.json

@@ -0,0 +1,13 @@
+{
+	"required": true,
+	"minVersion": "0.8",
+	"package": "net.pixaurora.janerator.mixin.test",
+	"compatibilityLevel": "JAVA_17",
+	"mixins": [
+		"CommandsMixin"
+	],
+	"injectors": {
+		"defaultRequire": 1
+	},
+	"plugin": "net.pixaurora.janerator.TestMixinConfig"
+}

src/main/resources/quilt.mod.json

@@ -33,7 +33,8 @@
 		]
 	},
 	"mixin": [
-        "janerator.mixins.json"
+        "janerator.mixins.json",
+        "janerator.test.mixins.json"
     ],
     "quilt_loom": {
         "injected_interfaces": {