import org.gradle.tooling.BuildController;
import org.gradle.tooling.model.GradleProject;
import org.gradle.tooling.model.gradle.GradleBuild;

import java.util.ArrayList;
import java.util.List;

public class FetchIncludedGradleProjects implements BuildAction<List<GradleProject>> {

    @Override
    public List<GradleProject> execute(BuildController controller) {
        List<GradleProject> projects = new ArrayList<GradleProject>();

                includeBuild 'includedBuild'
            """
        }
        singleProjectBuildInSubfolder("includedBuild")

        def projects = withConnection {
            action(new FetchIncludedGradleProjects()).run()
        }
        def includedTask = projects[0].tasks.find { it.name == 'tasks' }

        when:
        withBuild { BuildLauncher launcher ->
            launcher.forLaunchables(includedTask)