CC-Tweaked/build.gradle.kts

import org.jetbrains.gradle.ext.compiler
import org.jetbrains.gradle.ext.settings

plugins {
    alias(libs.plugins.taskTree)
    id("org.jetbrains.gradle.plugin.idea-ext")
}

idea.project.settings.compiler.javac {
    // We want ErrorProne to be present when compiling via IntelliJ, as it offers some helpful warnings
    // and errors. Loop through our source sets and find the appropriate flags.
    moduleJavacAdditionalOptions = subprojects
        .asSequence()
        .map { evaluationDependsOn(it.path) }
        .flatMap { project ->
            val sourceSets = project.extensions.findByType(SourceSetContainer::class) ?: return@flatMap sequenceOf()
            sourceSets.asSequence().map { sourceSet ->
                val name = "${idea.project.name}.${project.name}.${sourceSet.name}"
                val compile = project.tasks.named(sourceSet.compileJavaTaskName, JavaCompile::class).get()
                name to compile.options.allCompilerArgs.joinToString(" ") { if (it.contains(" ")) "\"$it\"" else it }
            }
        }
        .toMap()
}