private String defaultExecutable() {
        if (OperatingSystem.current().isWindows()) {
            return "gpg.exe";
        } else {
            return "gpg";
        }
    }

    public void setUseLegacyGpg(boolean useLegacyGpg) {
        this.useLegacyGpg = useLegacyGpg;
    }

    public boolean getUseLegacyGpg() {
        return useLegacyGpg;
    }

    public void setHomeDir(File homeDir) {

        GnupgSettings settings = new GnupgSettings();
        if (executable != null) {
            settings.setExecutable(executable.toString());
        }
        if (useLegacyGpg != null) {
            settings.setUseLegacyGpg(Boolean.parseBoolean(useLegacyGpg.toString()));
        }
        if (homeDir != null) {
            settings.setHomeDir(project.file(homeDir.toString()));
        }
        if (optionsFile != null) {