* @return An Optional that contains the Java test SourceSet if it exists.
     */
    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));
    }

    /**

        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;
    }

import org.elasticsearch.gradle.internal.conventions.util.Util;
import org.gradle.api.NamedDomainObjectContainer;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.tasks.SourceSet;
import org.gradle.api.tasks.TaskProvider;

import java.io.File;

import static org.elasticsearch.gradle.internal.precommit.FilePermissionsPrecommitPlugin.FILEPERMISSIONS_TASK_NAME;

 * Side Public License, v 1.
 */

package org.elasticsearch.gradle.internal;

import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.tasks.SourceSet;
import org.gradle.api.tasks.SourceSetContainer;

/**
 * Ideally, this plugin is intended to be temporary and in the long run we want to move
 * forward to port our test fixtures to use the gradle test fixtures plugin.

import org.elasticsearch.gradle.util.GradleUtils;
import org.gradle.api.JavaVersion;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.tasks.SourceSet;
import org.gradle.api.tasks.TaskProvider;
import org.gradle.api.tasks.testing.Test;

public class InternalClusterTestPlugin implements Plugin<Project> {

            // run compilation as part of precommit
            project.getExtensions().getByType(JavaPluginExtension.class).getSourceSets().all(sourceSet ->
                    precommit.configure(t -> t.shouldRunAfter(sourceSet.getClassesTaskName()))
            );
            // make sure tests run after all precommit tasks

            // We want to get any compilation error before running the pre-commit checks.
            project.getExtensions().getByType(JavaPluginExtension.class).getSourceSets().all(sourceSet ->
                    task.configure(t -> t.shouldRunAfter(sourceSet.getClassesTaskName()))
            );
        });
    }

    public abstract TaskProvider<? extends Task> createTask(Project project);

        }
    }

    void addRestTestsToProject(List<String> tests, String sourceSet = "test") {
        // uses the test source set by default, but in practice it would be a custom source set set by another plugin
        File testDir = new File(testProjectDir.root, "src/" + sourceSet + "/resources/rest-api-spec/test")
        testDir.mkdirs();
        tests.each { test ->

        this.projectLayout = projectLayout;
        setDescription("Tests various testing conventions");
        // Run only after everything is compiled
        GradleUtils.getJavaSourceSets(getProject()).all(sourceSet -> dependsOn(sourceSet.getOutput().getClassesDirs()));
        naming = getProject().container(TestingConventionRule.class);
    }

    @Input
    public Map<String, Set<File>> getClassFilesPerEnabledTask() {

import org.gradle.api.publish.maven.MavenPublication;
import org.gradle.api.publish.maven.plugins.MavenPublishPlugin;
import org.gradle.api.publish.maven.tasks.GenerateMavenPom;
import org.gradle.api.tasks.SourceSet;
import org.gradle.api.tasks.bundling.Jar;
import org.gradle.initialization.layout.BuildLayout;
import org.gradle.language.base.plugins.LifecycleBasePlugin;

import javax.inject.Inject;
import java.io.File;