given:
        def spec = specFactory.newExecAction()

        when:
        createProviderOf(ProcessOutputValueSource.class) {
            it.parameters {
                it.commandLine = ["echo", "hello"]
                withDefaultEnvironment(it)
            }
        }.get()

        then:
        1 * execOperations.exec(_) >> { Action<? super ExecSpec> action -> action.execute(spec) }

import java.util.Properties;

import org.apache.commons.cli.CommandLine;
import org.apache.maven.execution.DefaultMavenExecutionRequest;
import org.apache.maven.execution.MavenExecutionRequest;
import org.codehaus.plexus.classworlds.ClassWorld;

/**
 * CliRequest
 */
public class CliRequest {
    String[] args;

    CommandLine commandLine;

    ClassWorld classWorld;

    String workingDirectory;

            .printEnvironmentVariable("TEST_FOO")
            .writeTo(testDirectory, "script")

        buildFile """
            def execProvider = providers.exec {
                ${cmdToExecConfig(*testScript.commandLine, "--some-arg")}
                environment("TEST_FOO", "fooValue")
            }

            execProvider.result.get().assertNormalExitValue()
            println(execProvider.standardOutput.asText.get())

	allFlags.VisitAll(func(f *flag.Flag) {
		switch f.Name {
		case "v", "add_dir_header", "skip_headers":
			flag.CommandLine.Var(f.Value, f.Name, f.Usage)
		}
	})

	pflag.CommandLine.SetNormalizeFunc(cliflag.WordSepNormalizeFunc)
	pflag.CommandLine.AddGoFlagSet(flag.CommandLine)

	cmd := cmd.NewKubeadmCommand(os.Stdin, os.Stdout, os.Stderr)
	return cmd.Execute()

// After calling ResetForTesting, parse errors in flag handling will not
// exit the program.
func ResetForTesting(usage func()) {
	CommandLine = NewFlagSet(os.Args[0], ContinueOnError)
	CommandLine.SetOutput(io.Discard)
	CommandLine.Usage = commandLineUsage
	Usage = usage

            getExecOperations().exec(spec -> spec.commandLine("git", "clone", "--no-checkout", remoteUri, destinationDir.getAbsolutePath()));
        }
        getExecOperations().exec(spec -> {
            spec.commandLine("git", "checkout", getCommitId().get());
            spec.setWorkingDir(destinationDir);
        });
        getExecOperations().exec(spec -> {
            spec.commandLine("git", "clean", "-fdx");

        CommandLine commandLine = cliRequest.getCommandLine();
        String workingDirectory = cliRequest.getWorkingDirectory();
        MavenExecutionRequest request = cliRequest.getRequest();

        File userSettingsFile;

        if (commandLine.hasOption(CLIManager.ALTERNATE_USER_SETTINGS)) {
            userSettingsFile = new File(commandLine.getOptionValue(CLIManager.ALTERNATE_USER_SETTINGS));

            getExecOperations().exec(spec -> spec.commandLine("git", "clone", "--no-checkout", remoteUri, destinationDir.getAbsolutePath()));
        }
        getExecOperations().exec(spec -> {
            spec.commandLine("git", "checkout", getCommitId().get());
            spec.setWorkingDir(destinationDir);
        });
        getExecOperations().exec(spec -> {
            spec.commandLine("git", "clean", "-fdx");

        getDelegate().setCommandLine(args);
    }

    @Override
    default ExecSpec commandLine(Object... args) {
        getDelegate().commandLine(args);
        return this;
    }

    @Override
    default ExecSpec commandLine(Iterable<?> args) {
        getDelegate().commandLine(args);
        return this;
    }

    @Override
    default ExecSpec args(Object... args) {

	"fmt"
	"io"
	"log"
	"os"

	"internal/trace"
	"internal/trace/testtrace"
)

func init() {
	flag.Usage = func() {
		fmt.Fprintf(flag.CommandLine.Output(), "Usage: %s\n", os.Args[0])
		fmt.Fprintf(flag.CommandLine.Output(), "\n")
		fmt.Fprintf(flag.CommandLine.Output(), "Accepts a trace at stdin and validates it.\n")
		flag.PrintDefaults()
	}
	log.SetFlags(0)
}