Minecraft Forge assets not loading on Intellij - gradle

Question

I’m working on a Forge mod for Minecraft 1.12 on Intellij. Like a lot of people I ran into the issue of assets not being loaded when running the game from the IDE. All solutions that I tried have failed so far:
A lot of people have suggested to add the code below to build.gradle, but it raises an error because classesDir is deprecated; replacing it with classesDirs raises another error.
sourceSets {
main { output.resourcesDir = output.classesDir }
}
I changed the “Build and run using” setting from “Gradle” to “Intellij IDEA” in Build, Execution, Deployment > Build Tools > Gradle but I did not fix the problem either.
Additionally, when I try to build the jar, I get the following error:
Entry assets/mccode/lang/en_us.lang is a duplicate but no duplicate handling strategy has been set. I don’t know what’s wrong here neither…
Here is the build.gradle script I’m using, as generated by Intellij:
buildscript {
repositories {
// These repositories are only for Gradle plugins, put any other repositories in the repository block further below
maven { url = 'https://maven.minecraftforge.net' }
mavenCentral()
}
dependencies {
classpath group: 'net.minecraftforge.gradle', name: 'ForgeGradle', version: '5.1.+', changing: true
}
}
apply plugin: 'net.minecraftforge.gradle'
group = 'net.darmo_creations.mccode'
version = '1.0'
java {
archivesBaseName = 'mccode'
toolchain.languageVersion = JavaLanguageVersion.of(8)
}
minecraft {
// The mappings can be changed at any time and must be in the following format.
// Channel: Version:
// snapshot YYYYMMDD Snapshot are built nightly.
// stable # Stables are built at the discretion of the MCP team.
// official MCVersion Official field/method names from Mojang mapping files
//
// You must be aware of the Mojang license when using the 'official' mappings.
// See more information here: https://github.com/MinecraftForge/MCPConfig/blob/master/Mojang.md
//
// 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: 'stable', version: '39-1.12'
// accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')
// Default run configurations.
// These can be tweaked, removed, or duplicated as needed.
runs {
client {
workingDirectory project.file('run')
// Recommended logging data for a userdev environment
// The markers can be added/removed 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 {
mc_code {
source sourceSets.main
}
}
}
server {
workingDirectory project.file('run')
// Recommended logging data for a userdev environment
// The markers can be added/removed 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 {
mc_code {
source sourceSets.main
}
}
}
}
}
// 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:
// flatDir {
// dir 'libs'
// }
}
dependencies {
// Specify the version of Minecraft to use. If this is any group other than 'net.minecraft' it is assumed
// that the dep is a ForgeGradle 'patcher' dependency, and its patches will be applied.
// The userdev artifact is a special name and will get all sorts of transformations applied to it.
minecraft 'net.minecraftforge:forge:1.12.2-14.23.5.2854'
// Real mod deobf dependency examples - these get remapped to your current mappings
// compileOnly fg.deobf("mezz.jei:jei-${mc_version}:${jei_version}:api") // Adds JEI API as a compile dependency
// runtimeOnly fg.deobf("mezz.jei:jei-${mc_version}:${jei_version}") // Adds the full JEI mod as a runtime dependency
// implementation fg.deobf("com.tterrag.registrate:Registrate:MC${mc_version}-${registrate_version}") // Adds registrate as a dependency
implementation "org.antlr:antlr4:4.9.3"
// Examples using mod jars from ./libs
// 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
}
// Example for how to get properties into the manifest for reading at runtime.
jar {
manifest {
attributes([
"Specification-Title" : "mc_code",
"Specification-Vendor" : "Darmo",
"Specification-Version" : "1", // We are version 1 of ourselves
"Implementation-Title" : project.name,
"Implementation-Version" : project.jar.archiveVersion,
"Implementation-Vendor" : "Darmo",
"Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ")
])
}
}
jar.finalizedBy('reobfJar')
What am I doing wrong? I don’t understand why Intellij is not capable of properly setting up Forge projects by itself…

Answer 1

So, I got it working finally… I had to downgrade Gradle from 7.3 to 4.9, redo what I already did (add sourceSets { main { output.resourcesDir = output.classesDir } }, set Build and run using to Intellij IDEA) and, most importantly, add a pack.mcmeta to the resources directory.