import org.gradle.api.tasks.SourceSet

/**
 * A container of [JvmCompilation]s for a JVM project.
 *
 * Utility methods are provided to add compilations based on existing [SourceSet]s.
 */
abstract class JvmCompileExtension {

    companion object {
        const val NAME: String = "jvmCompile"
    }

    abstract val compilations: NamedDomainObjectContainer<JvmCompilation>

// it controls the JVM version of the compilation. This allows each source set within a project
// to compile to different JVM versions.

val jvmCompile = extensions.create<JvmCompileExtension>(JvmCompileExtension.NAME)

jvmCompile.compilations.configureEach {
    // Assume the compilation does not use any workarounds
    usesJdkInternals = false
    usesFutureStdlib = false

    options.release = provider {
        throw GradleException("This task '${name}' is not associated with a compilation. Associate it with a compilation on the '${JvmCompileExtension.NAME}' extension.")
    }
}

val gradleModule = the<GradleModuleExtension>()
the<JvmCompileExtension>().apply {
    compilations {
        configureEach {
            // Everything compiles to Java 17 by default
            targetJvmVersion = 17
        }