toolVersion = version("checkstyle")

  val sourceSets = project.extensions.findByType<SourceSetContainer>()
  val main = sourceSets?.findByName("main") ?: sourceSets?.findByName("jvmMain")
  if (main != null) {
    this.sourceSets = listOf(main)
  }
}

val androidSignature = configurations.maybeCreate("androidSignature")

     */
    public static Optional<SourceSet> getJavaTestSourceSet(Project project) {
        return project.getExtensions().findByName("java") == null
            ? Optional.empty()
            : Optional.ofNullable(getJavaSourceSets(project).findByName(SourceSet.TEST_SOURCE_SET_NAME));
    }

    /**
     * @param project The project to look for main Java resources.

        task.configure(t -> {
            t.setClasspath(project.getConfigurations().getByName(JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME));
            SourceSet mainSourceSet = GradleUtils.getJavaSourceSets(project).findByName(SourceSet.MAIN_SOURCE_SET_NAME);
            t.getSrcDirs().set(project.provider(() -> mainSourceSet.getAllSource().getSrcDirs()));
        });
        return task;
    }

        }
        return new TreeSet<>(Arrays.asList(jdkJarHellCheckList.split("\\r?\\n")));
    }

    private Configuration getRuntimeConfiguration() {
        Configuration runtime = getProject().getConfigurations().findByName("runtimeClasspath");
        if (runtime == null) {
            return getProject().getConfigurations().getByName("testCompileClasspath");
        }
        return runtime;
    }

fun Test.traceJson(): List<FileLocationProvider> = listOf(project.layout.buildDirectory.file("test-results/$name/trace.json"))

            }
        } else {
            throw new GradleException("Unknown JDK vendor [" + jdk.getVendor() + "]");
        }

        // Define the repository if we haven't already
        if (repositories.findByName(repoName) == null) {
            repositories.ivy(repo -> {
                repo.setName(repoName);
                repo.setUrl(repoUrl);

      val sourceSets =
        project.extensions
          .getByType(org.gradle.api.plugins.JavaPluginExtension::class.java)
          .sourceSets
      val existingMain = sourceSets.findByName("main")
      if (existingMain != null) return existingMain

      val jvmMainSourceSet = sourceSets.getByName("jvmMain")
      val mainSourceSet =
        object : org.gradle.api.tasks.SourceSet by jvmMainSourceSet {

    }

    @Input
    public Set<String> getMainClassNamedLikeTests() {
        SourceSetContainer javaSourceSets = GradleUtils.getJavaSourceSets(getProject());
        if (javaSourceSets.findByName(SourceSet.MAIN_SOURCE_SET_NAME) == null) {
            // some test projects don't have a main source set
            return Collections.emptySet();
        }