fix: Isolate mixins in alternative source sets

src/compat/jade/java/moe/nea/firmament/compat/jade/Compat.kt

@@ -0,0 +1,12 @@
+package moe.nea.firmament.compat.jade
+
+import net.fabricmc.loader.api.FabricLoader
+import moe.nea.firmament.util.compatloader.CompatMeta
+import moe.nea.firmament.util.compatloader.ICompatMeta
+
+@CompatMeta
+object Compat : ICompatMeta {
+	override fun shouldLoad(): Boolean {
+		return FabricLoader.getInstance().isModLoaded("jade")
+	}
+}

src/compat/rei/java/moe/nea/firmament/compat/rei/Compat.kt

@@ -0,0 +1,12 @@
+package moe.nea.firmament.compat.rei
+
+import net.fabricmc.loader.api.FabricLoader
+import moe.nea.firmament.util.compatloader.CompatMeta
+import moe.nea.firmament.util.compatloader.ICompatMeta
+
+@CompatMeta
+object Compat : ICompatMeta {
+	override fun shouldLoad(): Boolean {
+		return FabricLoader.getInstance().isModLoaded("roughlyenoughitems")
+	}
+}

src/compat/wildfireGender/java/moe/nea/firmament/compat/gender/Compat.kt

@@ -0,0 +1,13 @@
+package moe.nea.firmament.compat.gender
+
+import net.fabricmc.loader.api.FabricLoader
+import moe.nea.firmament.util.compatloader.CompatMeta
+import moe.nea.firmament.util.compatloader.ICompatMeta
+
+@CompatMeta
+object Compat : ICompatMeta {
+	override fun shouldLoad(): Boolean {
+		return FabricLoader.getInstance().isModLoaded("wildfire_gender")
+	}
+
+}

src/main/java/moe/nea/firmament/init/AutoDiscoveryPlugin.java

@@ -1,6 +1,9 @@
 package moe.nea.firmament.init;
 
 
+import moe.nea.firmament.util.ErrorUtil;
+import moe.nea.firmament.util.compatloader.ICompatMeta;
+
 import java.io.File;
 import java.io.IOException;
 import java.net.MalformedURLException;
@@ -94,7 +97,7 @@ public class AutoDiscoveryPlugin {
 		String norm = (className.substring(0, className.length() - ".class".length()))
 			              .replace("\\", "/")
 			              .replace("/", ".");
-		if (norm.startsWith(getMixinPackage() + ".") && !norm.endsWith(".")) {
+		if (norm.startsWith(getMixinPackage() + ".") && !norm.endsWith(".") && ICompatMeta.Companion.shouldLoad(norm)) {
 			mixins.add(norm.substring(getMixinPackage().length() + 1));
 		}
 	}
@@ -125,6 +128,7 @@ public class AutoDiscoveryPlugin {
 	 */
 	public List<String> getMixins() {
 		if (mixins != null) return mixins;
+		try {
 			System.out.println("Trying to discover mixins");
 			mixins = new ArrayList<>();
 			URL classUrl = getClass().getProtectionDomain().getCodeSource().getLocation();
@@ -137,12 +141,12 @@ public class AutoDiscoveryPlugin {
 					if (s.isBlank()) {
 						continue;
 					}
-				try {
 					tryDiscoverFromContentFile(new File(s).toURI().toURL());
-				} catch (MalformedURLException e) {
-					throw new RuntimeException(e);
 				}
 			}
+		} catch (Exception e) {
+			e.printStackTrace();
+			System.exit(1);
 		}
 		return mixins;
 	}

src/main/kotlin/Compat.kt

@@ -0,0 +1,11 @@
+package moe.nea.firmament
+
+import moe.nea.firmament.util.compatloader.CompatMeta
+import moe.nea.firmament.util.compatloader.ICompatMeta
+
+@CompatMeta
+object Compat : ICompatMeta {
+	override fun shouldLoad(): Boolean {
+		return true
+	}
+}

src/main/kotlin/features/FeatureManager.kt

@@ -31,6 +31,7 @@ import moe.nea.firmament.features.mining.PickaxeAbility
 import moe.nea.firmament.features.mining.PristineProfitTracker
 import moe.nea.firmament.features.world.FairySouls
 import moe.nea.firmament.features.world.Waypoints
+import moe.nea.firmament.util.compatloader.ICompatMeta
 import moe.nea.firmament.util.data.DataHolder
 
 object FeatureManager : DataHolder<FeatureManager.Config>(serializer(), "features", ::Config) {
@@ -83,6 +84,7 @@ object FeatureManager : DataHolder<FeatureManager.Config>(serializer(), "feature
 
 	fun subscribeEvents() {
 		SubscriptionList.allLists.forEach { list ->
+			if (ICompatMeta.shouldLoad(list.javaClass.name))
 				runCatching {
 					list.provideSubscriptions {
 						it.owner.javaClass.classes.forEach {

src/main/kotlin/util/compatloader/CompatLoader.kt

@@ -6,7 +6,7 @@ import kotlin.reflect.KClass
 import kotlin.streams.asSequence
 import moe.nea.firmament.Firmament
 
-abstract class CompatLoader<T : Any>(val kClass: Class<T>) {
+open class CompatLoader<T : Any>(val kClass: Class<T>) {
 	constructor(kClass: KClass<T>) : this(kClass.java)
 
 	val loader: ServiceLoader<T> = ServiceLoader.load(kClass)

src/main/kotlin/util/compatloader/CompatMeta.kt

@@ -0,0 +1,48 @@
+package moe.nea.firmament.util.compatloader
+
+import java.util.ServiceLoader
+import moe.nea.firmament.events.subscription.SubscriptionList
+import moe.nea.firmament.init.AutoDiscoveryPlugin
+import moe.nea.firmament.util.ErrorUtil
+
+/**
+ * Declares the compat meta interface for the current source set.
+ * This is used by [CompatLoader], [SubscriptionList], and [AutoDiscoveryPlugin]. Annotate a [ICompatMeta] object with
+ * this.
+ */
+annotation class CompatMeta
+
+interface ICompatMetaGen {
+	fun owns(className: String): Boolean
+	val meta: ICompatMeta
+}
+
+interface ICompatMeta {
+	fun shouldLoad(): Boolean
+
+	companion object {
+		val allMetas = ServiceLoader
+			.load(ICompatMetaGen::class.java)
+			.toList()
+
+		fun shouldLoad(className: String): Boolean {
+			// TODO: replace this with a more performant package lookup
+			val meta = if (ErrorUtil.aggressiveErrors) {
+				val fittingMetas = allMetas.filter { it.owns(className) }
+				require(fittingMetas.size == 1) { "Orphaned or duplicate owned class $className (${fittingMetas.map { it.meta }}). Consider adding a @CompatMeta object." }
+				fittingMetas.single()
+			} else {
+				allMetas.firstOrNull { it.owns(className) }
+			}
+			return meta?.meta?.shouldLoad() ?: true
+		}
+	}
+}
+
+object CompatHelper {
+	fun isOwnedByPackage(className: String, vararg packages: String): Boolean {
+		// TODO: create package lookup structure once
+		val packageName = className.substringBeforeLast('.')
+		return packageName in packages
+	}
+}

src/texturePacks/java/moe/nea/firmament/features/texturepack/Compat.kt

@@ -0,0 +1,11 @@
+package moe.nea.firmament.features.texturepack
+
+import moe.nea.firmament.util.compatloader.CompatMeta
+import moe.nea.firmament.util.compatloader.ICompatMeta
+
+@CompatMeta
+object Compat : ICompatMeta {
+	override fun shouldLoad(): Boolean {
+		return true
+	}
+}

symbols/src/main/kotlin/process/CompatMetaProcessor.kt

@@ -0,0 +1,63 @@
+package moe.nea.firmament.annotations.process
+
+import com.google.auto.service.AutoService
+import com.google.devtools.ksp.processing.CodeGenerator
+import com.google.devtools.ksp.processing.Dependencies
+import com.google.devtools.ksp.processing.KSPLogger
+import com.google.devtools.ksp.processing.Resolver
+import com.google.devtools.ksp.processing.SymbolProcessor
+import com.google.devtools.ksp.processing.SymbolProcessorEnvironment
+import com.google.devtools.ksp.processing.SymbolProcessorProvider
+import com.google.devtools.ksp.symbol.KSAnnotated
+import com.google.devtools.ksp.symbol.KSClassDeclaration
+import com.google.devtools.ksp.symbol.KSName
+
+class CompatMetaProcessor(val logger: KSPLogger, val codeGenerator: CodeGenerator, val sourceSetName: String) :
+	SymbolProcessor {
+	override fun process(resolver: Resolver): List<KSAnnotated> {
+		val files = resolver.getAllFiles().toList()
+		val packages = files.mapTo(mutableSetOf()) { it.packageName.asString() }
+		packages.add("moe.nea.firmament.annotations.generated.$sourceSetName")
+		val compatMeta = resolver.getSymbolsWithAnnotation("moe.nea.firmament.util.compatloader.CompatMeta")
+			.singleOrNull() as KSClassDeclaration? ?: return listOf()
+		val dependencies = Dependencies(aggregating = true, *files.toTypedArray())
+		val generatedFileName = "GeneratedCompat${sourceSetName.replaceFirstChar { it.uppercaseChar() }}"
+		val compatFile =
+			codeGenerator.createNewFile(dependencies, "moe.nea.firmament.annotations.generated.$sourceSetName", generatedFileName)
+				.bufferedWriter()
+		compatFile.appendLine("// This file is @generated by SubscribeAnnotationProcessor")
+		compatFile.appendLine("// Do not edit")
+		compatFile.appendLine("package moe.nea.firmament.annotations.generated.$sourceSetName")
+		compatFile.appendLine("class $generatedFileName : moe.nea.firmament.util.compatloader.ICompatMetaGen {")
+		compatFile.appendLine("""
+	override fun owns(className: String): Boolean {
+		return moe.nea.firmament.util.compatloader.CompatHelper.isOwnedByPackage(className, ${
+			packages.joinToString { "\"" + it + "\"" }
+		})
+	}
+
+	override val meta: moe.nea.firmament.util.compatloader.ICompatMeta
+		get() = ${compatMeta.qualifiedName!!.asString()}
+""")
+		compatFile.appendLine("}")
+		compatFile.close()
+		val metaInf = codeGenerator.createNewFileByPath(
+			dependencies,
+			"META-INF/services/moe.nea.firmament.util.compatloader.ICompatMetaGen", extensionName = "")
+			.bufferedWriter()
+		metaInf.append("moe.nea.firmament.annotations.generated.$sourceSetName.")
+		metaInf.appendLine(generatedFileName)
+		metaInf.close()
+		return listOf()
+	}
+
+
+	@AutoService(SymbolProcessorProvider::class)
+	class Provider : SymbolProcessorProvider {
+		override fun create(environment: SymbolProcessorEnvironment): SymbolProcessor {
+			return CompatMetaProcessor(environment.logger,
+			                           environment.codeGenerator,
+			                           environment.options["firmament.sourceset"] ?: "main")
+		}
+	}
+}

symbols/src/main/kotlin/process/SubscribeAnnotationProcessor.kt

@@ -32,7 +32,7 @@ class SubscribeAnnotationProcessor(
         val generatedFileName = "AllSubscriptions${sourceSetName.replaceFirstChar { it.uppercaseChar() }}"
         val subscriptionsFile =
             codeGenerator
-                .createNewFile(dependencies, "moe.nea.firmament.annotations.generated", generatedFileName)
+                .createNewFile(dependencies, "moe.nea.firmament.annotations.generated.$sourceSetName", generatedFileName)
                 .bufferedWriter()
         subscriptionsFile.apply {
             appendLine("// This file is @generated by SubscribeAnnotationProcessor")
@@ -40,7 +40,7 @@ class SubscribeAnnotationProcessor(
             for (file in subscriptionSet) {
                 appendLine("// Dependency: ${file.filePath}")
             }
-            appendLine("package moe.nea.firmament.annotations.generated")
+            appendLine("package moe.nea.firmament.annotations.generated.$sourceSetName")
             appendLine()
             appendLine("import moe.nea.firmament.events.subscription.*")
             appendLine()
@@ -65,7 +65,7 @@ class SubscribeAnnotationProcessor(
             dependencies,
             "META-INF/services/moe.nea.firmament.events.subscription.SubscriptionList", extensionName = "")
             .bufferedWriter()
-        metaInf.append("moe.nea.firmament.annotations.generated.")
+        metaInf.append("moe.nea.firmament.annotations.generated.$sourceSetName.")
         metaInf.appendLine(generatedFileName)
         metaInf.close()
     }