Switch from separate loader jars to one multiloader jar

Fabric/build.gradle.kts

@@ -1,3 +1,5 @@
+import org.gradle.jvm.tasks.Jar
+
 val modId: String by project
 val minecraftVersion: String by project
 val fabricVersion: String by project
@@ -45,6 +47,11 @@ tasks.jar {
 	exclude("com/terraformersmc/modmenu/")
 }
 
-tasks.remapJar {
-	archiveVersion.set(tasks.jar.get().archiveVersion)
+tasks.register<Jar>("uncompressedRemapJar") {
+	group = "fabric"
+	
+	from(tasks.remapJar.map { it.outputs.files.map(::zipTree) })
+
+	archiveClassifier.set("uncompressed")
+	entryCompression = ZipEntryCompression.STORED // Reduces size of multiloader jar.
 }

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

@@ -18,7 +18,7 @@
     "sources": "${sourcesURL}"
   },
   
-  "environment": "client",
+  "environment": "${sidesForFabric}",
   "entrypoints": {
     "client": [ "chylex.bettercontrols.BetterControlsMod" ],
     "modmenu": [ "chylex.bettercontrols.compatibility.ModMenuSupport" ]
@@ -26,7 +26,7 @@
   
   "mixins": [{
     "config": "${id}.mixins.json",
-    "environment": "client"
+    "environment": "${sidesForFabric}"
   }],
   
   "depends": {

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

@@ -21,11 +21,11 @@ modId = "minecraft"
 type = "required"
 versionRange = "[${minimumMinecraftVersion},)"
 ordering = "NONE"
-side = "CLIENT"
+side = "${sidesForNeoForge}"
 
 [[dependencies.${id}]]
 modId = "neoforge"
 type = "required"
 versionRange = "[${minimumNeoForgeVersion},)"
 ordering = "NONE"
-side = "CLIENT"
+side = "${sidesForNeoForge}"

build.gradle.kts

@@ -10,6 +10,7 @@ val modVersion: String by project
 val modLicense: String by project
 val modSourcesURL: String by project
 val modIssuesURL: String by project
+val modSides: String by project
 
 val minecraftVersion: String by project
 val mixinVersion: String by project
@@ -19,7 +20,6 @@ val minimumNeoForgeVersion: String by project
 val minimumFabricVersion: String by project
 
 val modNameStripped = modName.replace(" ", "")
-val jarVersion = "$minecraftVersion+v$modVersion"
 
 plugins {
 	idea
@@ -96,6 +96,13 @@ allprojects {
 	}
 	
 	tasks.withType<ProcessResources> {
+		val (sidesForNeoForge, sidesForFabric) = when (modSides) {
+			"both"   -> Pair("BOTH", "*")
+			"client" -> Pair("CLIENT", "client")
+			"server" -> Pair("SERVER", "server")
+			else     -> error("Invalid modSides value: $modSides")
+		}
+		
 		inputs.property("id", modId)
 		inputs.property("name", modName)
 		inputs.property("description", modDescription)
@@ -104,6 +111,8 @@ allprojects {
 		inputs.property("license", modLicense)
 		inputs.property("sourcesURL", modSourcesURL)
 		inputs.property("issuesURL", modIssuesURL)
+		inputs.property("sidesForNeoForge", sidesForNeoForge)
+		inputs.property("sidesForFabric", sidesForFabric)
 		inputs.property("minimumMinecraftVersion", minimumMinecraftVersion)
 		inputs.property("minimumNeoForgeVersion", minimumNeoForgeVersion)
 		inputs.property("minimumFabricVersion", minimumFabricVersion)
@@ -112,6 +121,11 @@ allprojects {
 			into("assets/$modId")
 		}
 	}
+	
+	tasks.withType<AbstractArchiveTask>().configureEach {
+		isPreserveFileTimestamps = false
+		isReproducibleFileOrder = true
+	}
 }
 
 subprojects {
@@ -136,10 +150,7 @@ subprojects {
 	}
 	
 	tasks.jar {
-		archiveVersion.set(jarVersion)
-		entryCompression = ZipEntryCompression.STORED
-		
-		from(rootProject.file("LICENSE"))
+		entryCompression = ZipEntryCompression.STORED // Reduces size of multiloader jar.
 		
 		manifest {
 			packageInformation(modId, "$modNameStripped-${project.name}")
@@ -168,20 +179,21 @@ val multiloaderJar = tasks.register<Jar>("multiloaderJar") {
 	group = "build"
 	
 	archiveBaseName.set(modNameStripped)
-	archiveVersion.set(jarVersion)
+	archiveVersion.set("$minecraftVersion+v$modVersion")
 	
 	destinationDirectory = layout.buildDirectory.dir("dist")
 	
-	fun includeJar(project: Project, jarTask: (TaskContainer) -> TaskProvider<out Jar>) {
-		from(jarTask(project.tasks).map { it.outputs }) {
+	fun includeJar(project: Project, jarTaskName: String) {
+		from(project.tasks.named(jarTaskName).map { it.outputs }) {
 			into("jars")
 			rename { "$modNameStripped-${project.name}.jar" }
 		}
 	}
 	
-	findProject(":NeoForge")?.let { includeJar(it, TaskContainer::jar) }
-	findProject(":Fabric")?.let { includeJar(it, TaskContainer::remapJar) }
+	findProject(":NeoForge")?.let { includeJar(it, "jar") }
+	findProject(":Fabric")?.let { includeJar(it, "uncompressedRemapJar") }
 	
+	from(rootProject.file("LICENSE"))
 	from(multiloaderSources.map { it.output })
 	
 	manifest {

gradle.properties

@@ -7,6 +7,7 @@ modVersion=1.3.1
 modLicense=MPL-2.0
 modSourcesURL=https://github.com/chylex/Better-Controls
 modIssuesURL=https://github.com/chylex/Better-Controls/issues
+modSides=client
 
 # Dependencies
 minecraftVersion=1.21

src/multiloader/resources/fabric.mod.json

@@ -18,7 +18,7 @@
     "sources": "${sourcesURL}"
   },
   
-  "environment": "client",
+  "environment": "${sidesForFabric}",
   
   "jars": [{
       "file": "jars/${jarPrefix}-Fabric.jar"