CommandLineParser parser = new CommandLineParser();
parser.allowUnknownOptions();
parser.option(GRADLE_USER_HOME_OPTION, GRADLE_USER_HOME_DETAILED_OPTION).hasArgument();
SystemPropertiesCommandLineConverter converter = new SystemPropertiesCommandLineConverter();
converter.configure(parser);
ParsedCommandLine options = parser.parse(args);
Properties systemProperties = System.getProperties();
systemProperties.putAll(converter.convert(options, new HashMap<String, String>()));
File gradleUserHome = gradleUserHome(options);
addSystemProperties(gradleUserHome, rootDir);