Switch from separate loader jars to one multiloader jar

Fabric/src/main/resources/fabric.mod.json

@@ -6,7 +6,7 @@
   "version": "${version}",
   "license": "${license}",
   
-  "icon": "assets/bettercontrols/icon.png",
+  "icon": "assets/${id}/logo.png",
   
   "authors": [
     "${author}"

NeoForge/src/main/resources/META-INF/neoforge.mods.toml

@@ -11,7 +11,7 @@ displayURL = "${sourcesURL}"
 description = "${description}"
 authors = "${author}"
 version = "${version}"
-logoFile = "icon.png"
+logoFile = "assets/${id}/logo.png"
 
 [[mixins]]
 config = "${id}.mixins.json"

build.gradle.kts

@@ -1,6 +1,6 @@
 @file:Suppress("ConvertLambdaToReference")
 
-import org.gradle.api.file.DuplicatesStrategy.EXCLUDE
+import org.gradle.jvm.tasks.Jar
 
 val modId: String by project
 val modName: String by project
@@ -94,6 +94,24 @@ allprojects {
 	dependencies {
 		implementation("org.jetbrains:annotations:24.1.0")
 	}
+	
+	tasks.withType<ProcessResources> {
+		inputs.property("id", modId)
+		inputs.property("name", modName)
+		inputs.property("description", modDescription)
+		inputs.property("version", modVersion)
+		inputs.property("author", modAuthor)
+		inputs.property("license", modLicense)
+		inputs.property("sourcesURL", modSourcesURL)
+		inputs.property("issuesURL", modIssuesURL)
+		inputs.property("minimumMinecraftVersion", minimumMinecraftVersion)
+		inputs.property("minimumNeoForgeVersion", minimumNeoForgeVersion)
+		inputs.property("minimumFabricVersion", minimumFabricVersion)
+		
+		from(rootProject.file("logo.png")) {
+			into("assets/$modId")
+		}
+	}
 }
 
 subprojects {
@@ -112,18 +130,6 @@ subprojects {
 	}
 	
 	tasks.processResources {
-		inputs.property("id", modId)
-		inputs.property("name", modName)
-		inputs.property("description", modDescription)
-		inputs.property("version", modVersion)
-		inputs.property("author", modAuthor)
-		inputs.property("license", modLicense)
-		inputs.property("sourcesURL", modSourcesURL)
-		inputs.property("issuesURL", modIssuesURL)
-		inputs.property("minimumMinecraftVersion", minimumMinecraftVersion)
-		inputs.property("minimumNeoForgeVersion", minimumNeoForgeVersion)
-		inputs.property("minimumFabricVersion", minimumFabricVersion)
-		
 		from(rootProject.sourceSets.main.get().resources) {
 			expand(inputs.properties)
 		}
@@ -131,18 +137,12 @@ subprojects {
 	
 	tasks.jar {
 		archiveVersion.set(jarVersion)
+		entryCompression = ZipEntryCompression.STORED
 		
 		from(rootProject.file("LICENSE"))
 		
 		manifest {
-			attributes(
-				"Specification-Title" to modId,
-				"Specification-Vendor" to modAuthor,
-				"Specification-Version" to "1",
-				"Implementation-Title" to "$modNameStripped-${project.name}",
-				"Implementation-Vendor" to modAuthor,
-				"Implementation-Version" to modVersion,
-			)
+			packageInformation(modId, "$modNameStripped-${project.name}")
 		}
 	}
 	
@@ -151,18 +151,54 @@ subprojects {
 	}
 }
 
-val copyJars = tasks.register<Copy>("copyJars") {
+fun Manifest.packageInformation(specificationTitle: String, implementationTitle: String) {
+	attributes(
+		"Specification-Title" to specificationTitle,
+		"Specification-Vendor" to modAuthor,
+		"Specification-Version" to "1",
+		"Implementation-Title" to implementationTitle,
+		"Implementation-Vendor" to modAuthor,
+		"Implementation-Version" to modVersion,
+	)
+}
+
+val multiloaderSources = sourceSets.register("multiloader")
+
+val multiloaderJar = tasks.register<Jar>("multiloaderJar") {
 	group = "build"
-	duplicatesStrategy = EXCLUDE
 	
-	for (subproject in subprojects) {
-		dependsOn(subproject.tasks.assemble)
-		from(subproject.base.libsDirectory.file("${subproject.base.archivesName.get()}-$jarVersion.jar"))
+	archiveBaseName.set(modNameStripped)
+	archiveVersion.set(jarVersion)
+	
+	destinationDirectory = layout.buildDirectory.dir("dist")
+	
+	fun includeJar(project: Project, jarTask: (TaskContainer) -> TaskProvider<out Jar>) {
+		from(jarTask(project.tasks).map { it.outputs }) {
+			into("jars")
+			rename { "$modNameStripped-${project.name}.jar" }
+		}
 	}
 	
-	into(project.layout.buildDirectory.dir("dist"))
+	findProject(":NeoForge")?.let { includeJar(it, TaskContainer::jar) }
+	findProject(":Fabric")?.let { includeJar(it, TaskContainer::remapJar) }
+	
+	from(multiloaderSources.map { it.output })
+	
+	manifest {
+		packageInformation("$modId-multiloader", modNameStripped)
+		attributes("FMLModType" to "GAMELIBRARY")
+	}
+}
+
+tasks.named<ProcessResources>("processMultiloaderResources").configure {
+	inputs.property("group", project.group)
+	inputs.property("jarPrefix", modNameStripped)
+	
+	filesMatching(listOf("fabric.mod.json", "META-INF/jarjar/metadata.json")) {
+		expand(inputs.properties)
+	}
 }
 
 tasks.assemble {
-	finalizedBy(copyJars)
+	finalizedBy(multiloaderJar)
 }

src/multiloader/resources/META-INF/jarjar/metadata.json

@@ -0,0 +1,13 @@
+{
+  "jars": [{
+    "identifier": {
+      "group": "${group}",
+      "artifact": "${id}"
+    },
+    "version": {
+      "artifactVersion": "${version}",
+      "range": "[${version}]"
+    },
+    "path": "jars/${jarPrefix}-NeoForge.jar"
+  }]
+}

src/multiloader/resources/fabric.mod.json

@@ -0,0 +1,34 @@
+{
+  "schemaVersion": 1,
+  "id": "${id}_multiloader",
+  "name": "${name} (Multiloader)",
+  "description": "${description}",
+  "version": "${version}",
+  "license": "${license}",
+  
+  "icon": "assets/${id}/logo.png",
+  
+  "authors": [
+    "${author}"
+  ],
+  
+  "contact": {
+    "homepage": "https://chylex.com",
+    "issues": "${issuesURL}",
+    "sources": "${sourcesURL}"
+  },
+  
+  "environment": "client",
+  
+  "jars": [{
+      "file": "jars/${jarPrefix}-Fabric.jar"
+  }],
+  
+  "custom": {
+    "modmenu": {
+      "parent": "${id}",
+      "badges": [ "library" ],
+      "update_checker": false
+    }
+  }
+}