import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

/**
 * Encapsulates the configuration for the compilation of a source set, including:
 * - The target JVM version
 * - Workarounds which may affect the way the compilation is performed
 *
 * The compilation workarounds include:
 * - Using JDK internal classes
 * - Using Java standard library APIs that were introduced after the JVM version they are targeting

// 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

   * mentioned in the method Javadoc does in fact compile.
   */

  @SuppressWarnings("unused") // compilation test
  public void testSampleCodeError1() {
    Optional<Integer> optionalInt = getSomeOptionalInt();
    // Number value = optionalInt.or(0.5); // error
  }

  @SuppressWarnings("unused") // compilation test
  public void testSampleCodeError2() {
    FluentIterable<? extends Number> numbers = getSomeNumbers();

val compileJavaModuleInfo by tasks.registering(JavaCompile::class) {
  val moduleName = "okhttp3"
  val compilation = kotlin.targets["jvm"].compilations["main"]
  val compileKotlinTask = compilation.compileTaskProvider.get() as KotlinJvmCompile
  val targetDir = compileKotlinTask.destinationDirectory.dir("../java9")
  val sourceDir = file("src/jvmMain/java9/")

#!/bin/bash

set -e
# Enable tracing if set.
[ -n "$BASH_XTRACEFD" ] && set -x

function _init() {
	## All binaries are static make sure to disable CGO.
	export CGO_ENABLED=0

	## List of architectures and OS to test coss compilation.
	SUPPORTED_OSARCH="linux/ppc64le linux/mips64 linux/amd64 linux/arm64 linux/s390x darwin/arm64 darwin/amd64 freebsd/amd64 windows/amd64 linux/arm linux/386 netbsd/amd64 linux/mips openbsd/amd64 linux/riscv64"
}

import okhttp3.Call;
import okhttp3.HttpUrl;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.logging.HttpLoggingInterceptor;
import okhttp3.logging.LoggingEventListener;

/**
 * Just checking compilation works
 */
public class OkHttpCaller {
  public static Call callOkHttp(HttpUrl url) {
    OkHttpClient client = new OkHttpClient
      .Builder()

 *
 * @since 4.0.0
 */
@Experimental
public enum CacheRetention {
    /**
     * Data should be persisted across Maven invocations.
     * Suitable for:
     * - Dependency resolution results
     * - Compilation outputs
     * - Downloaded artifacts
     */
    PERSISTENT,

    /**
     * Data should be retained for the duration of the current Maven session.
     * Suitable for:
     * - Build-wide configuration

and there are no missing null checks.

## Decision

Use "NullAway" in JSpecify mode to check for null-related errors in Java code.

Consider improper uses of `null` detected by NullAway a compilation error (not a warning, and not a separate CI job to test).

Do not suppress NullAway errors without a justification.

    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

    // not needed when compiling with recent JDKs, e.g. 17
    options.compilerArgs.add("-Xlint:-requires-transitive-automatic")

    // Patch the compileKotlinJvm output classes into the compilation so exporting packages works correctly.
    options.compilerArgs.addAll(
      listOf(
        "--patch-module",
        "$moduleName=${compileKotlinTask.destinationDirectory.get().asFile}",
      ),
    )