I want to add an ES6 JavaScript executor to my mod. I've tried GraalVM and currently org.mozilla:rhino, which work fine in an external main() entry point, but in-game, they always throw a java.lang.ClassNotFoundException. I attempted to use Shadow to relocate the package names, but it doesn’t seem to have any effect—maybe I misconfigured Shadow?
I tried consulting AI and searching Google, and followed various suggested Gradle script configurations, but all attempts failed (Some of the tutorials I found use outdated versions, which might be causing conflicts or missing critical fixes.). So now I've cleaned up the uncertain parts in my build.gradle
plugins {
id 'eclipse'
id 'idea'
id 'maven-publish'
id 'net.minecraftforge.gradle' version '[6.0,6.2)'
id 'org.parchmentmc.librarian.forgegradle' version '1.+'
id 'org.spongepowered.mixin' version '0.7.+' // Mixin 插件
id 'com.github.johnrengelman.shadow' version '8.1.1'
}
mixin {
add sourceSets.main, "acheli-refmap.json"
config "mixins.archers_helicopter.json"
}
//Version number generation
// 使用安全操作符和默认值处理未定义的属性
def suffix = project.findProperty('suffix') ?: ""
def type = project.findProperty('type') ?: ""
def platform = project.findProperty('platform') ?: ""
def modVersion = project.findProperty('mod_version') ?: "0.0.0" // 必须定义默认版本
// 构建版本号逻辑
def suf = ""
def typ = ""
def plat = ""
if (suffix != "") {
suf = "-${suffix}"
}
if (type != "") {
typ = "-${type}"
}
if (platform != "") {
plat = "${platform}"
}
version = "${plat}-${modVersion}-${new Date().format('MMdd.HHmm')}${suf}${typ}"
group = mod_group_id
base {
archivesName = mod_id
}
// Mojang ships Java 17 to end users in 1.18+, so your mod should target Java 17.
java.toolchain.languageVersion = JavaLanguageVersion.of(17)
println "Java: ${System.getProperty 'java.version'}, JVM: ${System.getProperty 'java.vm.version'} (${System.getProperty 'java.vendor'}), Arch: ${System.getProperty 'os.arch'}"
minecraft {
// The mappings can be changed at any time and must be in the following format.
// Channel: Version:
// official MCVersion Official field/method names from Mojang mapping files
// parchment YYYY.MM.DD-MCVersion Open community-sourced parameter names and javadocs layered on top of official
//
// You must be aware of the Mojang license when using the 'official' or 'parchment' mappings.
// See more information here: https://github.com/MinecraftForge/MCPConfig/blob/master/Mojang.md
//
// Parchment is an unofficial project maintained by ParchmentMC, separate from MinecraftForge
// Additional setup is needed to use their mappings: https://parchmentmc.org/docs/getting-started
//
// Use non-default mappings at your own risk. They may not always work.
// Simply re-run your setup task after changing the mappings to update your workspace.
mappings channel: mapping_channel, version: mapping_version
// When true, this property will have all Eclipse/IntelliJ IDEA run configurations run the "prepareX" task for the given run configuration before launching the game.
// In most cases, it is not necessary to enable.
// enableEclipsePrepareRuns = true
// enableIdeaPrepareRuns = true
// This property allows configuring Gradle's ProcessResources task(s) to run on IDE output locations before launching the game.
// It is REQUIRED to be set to true for this template to function.
// See https://docs.gradle.org/current/dsl/org.gradle.language.jvm.tasks.ProcessResources.html
copyIdeResources = true
// When true, this property will add the folder name of all declared run configurations to generated IDE run configurations.
// The folder name can be set on a run configuration using the "folderName" property.
// By default, the folder name of a run configuration is the name of the Gradle project containing it.
// generateRunFolders = true
// This property enables access transformers for use in development.
// They will be applied to the Minecraft artifact.
// The access transformer file can be anywhere in the project.
// However, it must be at "META-INF/accesstransformer.cfg" in the final mod jar to be loaded by Forge.
// This default location is a best practice to automatically put the file in the right place in the final jar.
// See https://docs.minecraftforge.net/en/latest/advanced/accesstransformers/ for more information.
// accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')
// Default run configurations.
// These can be tweaked, removed, or duplicated as needed.
runs {
// applies to all the run configs below
configureEach {
workingDirectory project.file('run')
// Recommended logging data for a userdev environment
// The markers can be added/remove as needed separated by commas.
// "SCAN": For mods scan.
// "REGISTRIES": For firing of registry events.
// "REGISTRYDUMP": For getting the contents of all registries.
property 'forge.logging.markers', 'REGISTRIES'
// Recommended logging level for the console
// You can set various levels here.
// Please read: https://stackoverflow.com/questions/2031163/when-to-use-the-different-log-levels
property 'forge.logging.console.level', 'debug'
mods {
"${mod_id}" {
source sourceSets.main
}
}
}
client {
// Comma-separated list of namespaces to load gametests from. Empty = all namespaces.
property 'forge.enabledGameTestNamespaces', mod_id
}
server {
property 'forge.enabledGameTestNamespaces', mod_id
args '--nogui'
}
// This run config launches GameTestServer and runs all registered gametests, then exits.
// By default, the server will crash when no gametests are provided.
// The gametest system is also enabled by default for other run configs under the /test command.
gameTestServer {
property 'forge.enabledGameTestNamespaces', mod_id
}
data {
// example of overriding the workingDirectory set in configureEach above
workingDirectory project.file('run-data')
// Specify the modid for data generation, where to output the resulting resource, and where to look for existing resources.
args '--mod', mod_id, '--all', '--output', file('src/generated/resources/'), '--existing', file('src/main/resources/')
}
}
}
// Include resources generated by data generators.
sourceSets.main.resources { srcDir 'src/generated/resources' }
repositories {
// Put repositories for dependencies here
// ForgeGradle automatically adds the Forge maven and Maven Central for you
// If you have mod jar dependencies in ./libs, you can declare them as a repository like so.
// See https://docs.gradle.org/current/userguide/declaring_repositories.html#sub:flat_dir_resolver
// flatDir {
// dir 'libs'
// }
maven {url='https://maven.aliyun.com/repository/public/'}
maven {url='https://maven.aliyun.com/repository/gradle-plugin/'}
maven {url='https://maven.aliyun.com/repository/forge/'}
maven {url = "https://maven.theillusivec4.top/"}
maven {url = 'https://dl.cloudsmith.io/public/geckolib3/geckolib/maven/'}
maven {
name = "Jared's maven"
url = "https://maven.blamejared.com/"
}
maven {
url "https://maven.shedaniel.me/"
}
maven {
url "https://cursemaven.com"
content {
includeGroup "curse.maven"
}
}
}
dependencies {
// Specify the version of Minecraft to use.
// Any artifact can be supplied so long as it has a "userdev" classifier artifact and is a compatible patcher artifact.
// The "userdev" classifier will be requested and setup by ForgeGradle.
// If the group id is "net.minecraft" and the artifact id is one of ["client", "server", "joined"],
// then special handling is done to allow a setup of a vanilla dependency without the use of an external repository.
minecraft "net.minecraftforge:forge:${minecraft_version}-${forge_version}"
// 确保包含 Mixin 注解处理器
annotationProcessor 'org.spongepowered:mixin:0.8.5:processor'
implementation fg.deobf('software.bernie.geckolib:geckolib-forge-1.20.1:4.7.1')
implementation 'org.mozilla:rhino:1.7.14'
// Example mod dependency with JEI - using fg.deobf() ensures the dependency is remapped to your development mappings
// The JEI API is declared for compile time use, while the full JEI artifact is used at runtime
// compileOnly fg.deobf("mezz.jei:jei-${mc_version}-common-api:${jei_version}")
// compileOnly fg.deobf("mezz.jei:jei-${mc_version}-forge-api:${jei_version}")
// runtimeOnly fg.deobf("mezz.jei:jei-${mc_version}-forge:${jei_version}")
// Example mod dependency using a mod jar from ./libs with a flat dir repository
// This maps to ./libs/coolmod-${mc_version}-${coolmod_version}.jar
// The group id is ignored when searching -- in this case, it is "blank"
// implementation fg.deobf("blank:coolmod-${mc_version}:${coolmod_version}")
// For more info:
// http://www.gradle.org/docs/current/userguide/artifact_dependencies_tutorial.html
// http://www.gradle.org/docs/current/userguide/dependency_management.html
}
tasks.named('shadowJar', com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar) {
configurations = [project.configurations.runtimeClasspath]
relocate 'org.mozilla.javascript', 'shaded.org.mozilla.javascript'
}
// This block of code expands all declared replace properties in the specified resource targets.
// A missing property will result in an error. Properties are expanded using ${} Groovy notation.
// When "copyIdeResources" is enabled, this will also run before the game launches in IDE environments.
// See https://docs.gradle.org/current/dsl/org.gradle.language.jvm.tasks.ProcessResources.html
tasks.named('processResources', ProcessResources).configure {
var replaceProperties = [
minecraft_version: minecraft_version, minecraft_version_range: minecraft_version_range,
forge_version: forge_version, forge_version_range: forge_version_range,
loader_version_range: loader_version_range,
mod_id: mod_id, mod_name: mod_name, mod_license: mod_license, mod_version: mod_version,
mod_authors: mod_authors, mod_description: mod_description,
]
inputs.properties replaceProperties
filesMatching(['META-INF/mods.toml', 'pack.mcmeta']) {
expand replaceProperties + [project: project]
}
}
// Example for how to get properties into the manifest for reading at runtime.
tasks.named('jar', Jar).configure {
manifest {
attributes([
'Specification-Title' : mod_id,
'Specification-Vendor' : mod_authors,
'Specification-Version' : '1', // We are version 1 of ourselves
'Implementation-Title' : project.name,
'Implementation-Version' : project.jar.archiveVersion,
'Implementation-Vendor' : mod_authors,
'Implementation-Timestamp': new Date().format("yyyy-MM-dd'T'HH:mm:ssZ")
])
}
// This is the preferred method to reobfuscate your jar file
finalizedBy 'reobfJar'
}
// However if you are in a multi-project build, dev time needs unobfed jar files, so you can delay the obfuscation until publishing by doing:
// tasks.named('publish').configure {
// dependsOn 'reobfJar'
// }
// Example configuration to allow publishing using the maven-publish plugin
tasks.withType(JavaCompile).configureEach {
options.encoding = 'UTF-8' // Use the UTF-8 charset for Java compilation
}
tasks.withType(JavaCompile).configureEach {
options.compilerArgs += ["-parameters"]
}
I had this problem when trying to use luaJ and Jython within my minecraft mod. I found the answer in another thread and hope this solves your problem too.
https://stackoverflow.com/a/79173826
Instead of this:
dependencies {
...
implementation 'black.ninia:jep:4.2.2' // Your dependency instead
}
Do this:
dependencies {
...
minecraftLibrary fg.deobf("black.ninia:jep:4.2.2") // Your dependency instead
}
A brief explanation can also be found on the forge docs. https://docs.minecraftforge.net/en/fg-5.x/dependencies/