}

        @Override
        public void applyTo(String value, BuildLayoutParameters settings, Origin origin) {
            Transformer<File, String> resolver = new BasicFileResolver(settings.getCurrentDir());
            settings.setGradleUserHomeDir(resolver.transform(value));
        }
    }

    public static class ProjectDirOption extends StringBuildOption<BuildLayoutParameters> {
        public ProjectDirOption() {

    public BuildLayoutConfiguration(BuildLayoutParameters parameters) {
        this.currentDir = parameters.getCurrentDir();
        this.searchUpwards = true;
        this.settingsFile = parameters.getSettingsFile();
        this.buildFile = parameters.getBuildFile();
        this.useEmptySettings = false;
    }

    public File getCurrentDir() {
        return currentDir;
    }

    public boolean isSearchUpwards() {

        }

        return getLayoutFor(configuration.getCurrentDir(), configuration.isSearchUpwards());
    }

    private BuildLayout buildLayoutFrom(BuildLayoutConfiguration configuration, File settingsFile) {
        return new BuildLayout(configuration.getCurrentDir(), configuration.getCurrentDir(), settingsFile, scriptFileResolver);
    }

    @Nullable

    public BuildLayoutParameters() {
        this(
            findGradleInstallationHomeDir(),
            findGradleUserHomeDir(),
            null,
            canonicalize(SystemProperties.getInstance().getCurrentDir()),
            null,
            null
        );
    }

    public BuildLayoutParameters(
        @Nullable File gradleInstallationHomeDir,
        File gradleUserHomeDir,

            this.buildLayout = buildLayout;
        }

        @Override
        public void applyTo(BuildLayoutParameters buildLayout) {
            buildLayout.setCurrentDir(this.buildLayout.getCurrentDir());
            buildLayout.setProjectDir(this.buildLayout.getProjectDir());
            buildLayout.setGradleUserHomeDir(this.buildLayout.getGradleUserHomeDir());

        return parameters;
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + "{"
            + "id=" + getIdentifier()
            + ", currentDir=" + parameters.getCurrentDir()
            + '}';
    }

import java.io.File;
import java.util.Map;

public interface BuildActionParameters {
    Map<String, String> getSystemProperties();

    Map<String, String> getEnvVariables();

    File getCurrentDir();

    LogLevel getLogLevel();

    boolean isUseDaemon();

    ClassPath getInjectedPluginClasspath();

        if (explicitProjectDir != null) {
            return new ProjectDirectoryProjectSpec(explicitProjectDir);
        }
        return new CurrentDirectoryProjectSpec(startParameter.getCurrentDir(), settings);
    }

        return systemProperties;
    }

    @Override
    public Map<String, String> getEnvVariables() {
        return envVariables;
    }

    @Override
    public File getCurrentDir() {
        return currentDir;
    }

    @Override
    public LogLevel getLogLevel() {
        return logLevel;
    }

    @Override
    public String toString() {

        expect:
        def params = new BuildLayoutParameters()
        params.gradleUserHomeDir == canonicalize(BuildLayoutParameters.DEFAULT_GRADLE_USER_HOME)
        params.currentDir == canonicalize(SystemProperties.instance.getCurrentDir())
        params.projectDir == null
        params.searchDir == params.currentDir
    }

    def "reads gradle user home dir from system property"() {
        def dir = temp.createDir("someGradleUserHomePath")