def _parse_args(args=None):
        print_options = printing.print_options()

        perf_option_list = [
            optparse.make_option('--debug', action='store_const', const='Debug', dest="configuration",
                help='Set the configuration to Debug'),
            optparse.make_option('--release', action='store_const', const='Release', dest="configuration",
                help='Set the configuration to Release'),
            optparse.make_option("--platform",
                help="Specify port/platform being tested (i.e. chromium-mac)"),
            optparse.make_option("--builder-name",
                help=("The name of the builder shown on the waterfall running this script e.g. google-mac-2.")),
            optparse.make_option("--build-number",
                help=("The build number of the builder running this script.")),
            optparse.make_option("--build", dest="build", action="store_true", default=True,
                help="Check to ensure the DumpRenderTree build is up-to-date (default)."),
            optparse.make_option("--build-directory",
                help="Path to the directory under which build files are kept (should not include configuration)"),
            optparse.make_option("--time-out-ms", default=600 * 1000,
                help="Set the timeout for each test"),
            optparse.make_option("--output-json-path",
                help="Filename of the JSON file that summaries the results"),
            optparse.make_option("--source-json-path",
                help="Path to a JSON file to be merged into the JSON file when --output-json-path is present"),
            optparse.make_option("--test-results-server",
                help="Upload the generated JSON file to the specified server when --output-json-path is present"),
            ]

        option_list = (perf_option_list + print_options)
        return optparse.OptionParser(option_list=option_list).parse_args(args)

    def get_printer(self, args=None):
        args = args or []
        printing_options = printing.print_options()
        option_parser = optparse.OptionParser(option_list=printing_options)
        options, args = option_parser.parse_args(args)
        host = MockHost()
        self._port = host.port_factory.get('test', options)

        regular_output = StringIO.StringIO()
        printer = printing.Printer(self._port, options, regular_output)
        return printer, regular_output

    def get_printer(self, args=None, tty=False):
        args = args or []
        printing_options = printing.print_options()
        option_parser = optparse.OptionParser(option_list=printing_options)
        options, args = option_parser.parse_args(args)
        self._port = port.get('test', options)
        nproc = 2

        regular_output = array_stream.ArrayStream(tty=tty)
        buildbot_output = array_stream.ArrayStream()
        printer = printing.Printer(self._port, options, regular_output,
                                   buildbot_output, configure_logging=True)
        return printer, regular_output, buildbot_output

    def get_printer(self, args=None, tty=False):
        args = args or []
        printing_options = printing.print_options()
        option_parser = optparse.OptionParser(option_list=printing_options)
        options, args = option_parser.parse_args(args)
        host = MockHost()
        self._port = host.port_factory.get("test", options)
        nproc = 2

        regular_output = StringIO.StringIO()
        regular_output.isatty = lambda: tty
        buildbot_output = StringIO.StringIO()
        printer = printing.Printer(self._port, options, regular_output, buildbot_output)
        return printer, regular_output, buildbot_output

def get_options(args):
    print_options = printing.print_options()
    option_parser = optparse.OptionParser(option_list=print_options)
    return option_parser.parse_args(args)

def parse_args(args):
    option_group_definitions = []

    option_group_definitions.append(("Platform options", platform_options()))
    option_group_definitions.append(("Configuration options", configuration_options()))
    option_group_definitions.append(("Printing Options", printing.print_options()))

    option_group_definitions.append(("EFL-specific Options", [
        optparse.make_option("--webprocess-cmd-prefix", type="string",
            default=False, help="Prefix used when spawning the Web process (Debug mode only)"),
    ]))

    option_group_definitions.append(("WebKit Options", [
        optparse.make_option("--gc-between-tests", action="store_true", default=False,
            help="Force garbage collection between each test"),
        optparse.make_option("--complex-text", action="store_true", default=False,
            help="Use the complex text code path for all text (Mac OS X and Windows only)"),
        optparse.make_option("-l", "--leaks", action="store_true", default=False,
            help="Enable leaks checking (Mac OS X only)"),
        optparse.make_option("-g", "--guard-malloc", action="store_true", default=False,
            help="Enable Guard Malloc (Mac OS X only)"),
        optparse.make_option("--threaded", action="store_true", default=False,
            help="Run a concurrent JavaScript thread with each test"),
        optparse.make_option("--webkit-test-runner", "-2", action="store_true",
            help="Use WebKitTestRunner rather than DumpRenderTree."),
        # FIXME: We should merge this w/ --build-directory and only have one flag.
        optparse.make_option("--root", action="store",
            help="Path to a directory containing the executables needed to run tests."),
    ]))

    option_group_definitions.append(("Results Options", [
        optparse.make_option("-p", "--pixel", "--pixel-tests", action="store_true",
            dest="pixel_tests", help="Enable pixel-to-pixel PNG comparisons"),
        optparse.make_option("--no-pixel", "--no-pixel-tests", action="store_false",
            dest="pixel_tests", help="Disable pixel-to-pixel PNG comparisons"),
        optparse.make_option("--no-sample-on-timeout", action="store_false",
            dest="sample_on_timeout", help="Don't run sample on timeout (Mac OS X only)"),
        optparse.make_option("--no-ref-tests", action="store_true",
            dest="no_ref_tests", help="Skip all ref tests"),
        optparse.make_option("--tolerance",
            help="Ignore image differences less than this percentage (some "
                "ports may ignore this option)", type="float"),
        optparse.make_option("--results-directory", help="Location of test results"),
        optparse.make_option("--build-directory",
            help="Path to the directory under which build files are kept (should not include configuration)"),
        optparse.make_option("--add-platform-exceptions", action="store_true", default=False,
            help="Save generated results into the *most-specific-platform* directory rather than the *generic-platform* directory"),
        optparse.make_option("--new-baseline", action="store_true",
            default=False, help="Save generated results as new baselines "
                 "into the *most-specific-platform* directory, overwriting whatever's "
                 "already there. Equivalent to --reset-results --add-platform-exceptions"),
        optparse.make_option("--reset-results", action="store_true",
            default=False, help="Reset expectations to the "
                 "generated results in their existing location."),
        optparse.make_option("--no-new-test-results", action="store_false",
            dest="new_test_results", default=True,
            help="Don't create new baselines when no expected results exist"),

        #FIXME: we should support a comma separated list with --pixel-test-directory as well.
        optparse.make_option("--pixel-test-directory", action="append", default=[], dest="pixel_test_directories",
            help="A directory where it is allowed to execute tests as pixel tests. "
                 "Specify multiple times to add multiple directories. "
                 "This option implies --pixel-tests. If specified, only those tests "
                 "will be executed as pixel tests that are located in one of the "
                 "directories enumerated with the option. Some ports may ignore this "
                 "option while others can have a default value that can be overridden here."),

        optparse.make_option("--skip-failing-tests", action="store_true",
            default=False, help="Skip tests that are expected to fail. "
                 "Note: When using this option, you might miss new crashes "
                 "in these tests."),
        optparse.make_option("--additional-drt-flag", action="append",
            default=[], help="Additional command line flag to pass to DumpRenderTree "
                 "Specify multiple times to add multiple flags."),
        optparse.make_option("--driver-name", type="string",
            help="Alternative DumpRenderTree binary to use"),
        optparse.make_option("--additional-platform-directory", action="append",
            default=[], help="Additional directory where to look for test "
                 "baselines (will take precendence over platform baselines). "
                 "Specify multiple times to add multiple search path entries."),
        optparse.make_option("--additional-expectations", action="append", default=[],
            help="Path to a test_expectations file that will override previous expectations. "
                 "Specify multiple times for multiple sets of overrides."),
        optparse.make_option("--compare-port", action="store", default=None,
            help="Use the specified port's baselines first"),
        optparse.make_option("--no-show-results", action="store_false",
            default=True, dest="show_results",
            help="Don't launch a browser with results after the tests "
                 "are done"),
        optparse.make_option("--full-results-html", action="store_true",
            default=False,
            help="Show all failures in results.html, rather than only regressions"),
        optparse.make_option("--clobber-old-results", action="store_true",
            default=False, help="Clobbers test results from previous runs."),
        optparse.make_option("--http", action="store_true", dest="http",
            default=True, help="Run HTTP and WebSocket tests (default)"),
        optparse.make_option("--no-http", action="store_false", dest="http",
            help="Don't run HTTP and WebSocket tests"),
        optparse.make_option("--ignore-metrics", action="store_true", dest="ignore_metrics",
            default=False, help="Ignore rendering metrics related information from test "
#.........这里部分代码省略.........

def parse_args(args=None):
    """Provides a default set of command line args.

    Returns a tuple of options, args from optparse"""

    option_group_definitions = []

    option_group_definitions.append(("Configuration options", port_options()))
    option_group_definitions.append(("Printing Options", printing.print_options()))

    # FIXME: These options should move onto the ChromiumPort.
    option_group_definitions.append(("Chromium-specific Options", [
        optparse.make_option("--startup-dialog", action="store_true",
            default=False, help="create a dialog on DumpRenderTree startup"),
        optparse.make_option("--gp-fault-error-box", action="store_true",
            default=False, help="enable Windows GP fault error box"),
        optparse.make_option("--js-flags",
            type="string", help="JavaScript flags to pass to tests"),
        optparse.make_option("--stress-opt", action="store_true",
            default=False,
            help="Enable additional stress test to JavaScript optimization"),
        optparse.make_option("--stress-deopt", action="store_true",
            default=False,
            help="Enable additional stress test to JavaScript optimization"),
        optparse.make_option("--nocheck-sys-deps", action="store_true",
            default=False,
            help="Don't check the system dependencies (themes)"),
        optparse.make_option("--accelerated-video",
            action="store_true",
            help="Use hardware-accelerated compositing for video"),
        optparse.make_option("--no-accelerated-video",
            action="store_false",
            dest="accelerated_video",
            help="Don't use hardware-accelerated compositing for video"),
        optparse.make_option("--threaded-compositing",
            action="store_true",
            help="Use threaded compositing for rendering"),
        optparse.make_option("--accelerated-2d-canvas",
            action="store_true",
            help="Use hardware-accelerated 2D Canvas calls"),
        optparse.make_option("--no-accelerated-2d-canvas",
            action="store_false",
            dest="accelerated_2d_canvas",
            help="Don't use hardware-accelerated 2D Canvas calls"),
        optparse.make_option("--accelerated-painting",
            action="store_true",
            default=False,
            help="Use hardware accelerated painting of composited pages"),
        optparse.make_option("--enable-hardware-gpu",
            action="store_true",
            default=False,
            help="Run graphics tests on real GPU hardware vs software"),
        optparse.make_option("--per-tile-painting",
            action="store_true",
            help="Use per-tile painting of composited pages"),
        optparse.make_option("--adb-args", type="string",
            help="Arguments parsed to Android adb, to select device, etc."),
    ]))

    option_group_definitions.append(("WebKit Options", [
        optparse.make_option("--gc-between-tests", action="store_true", default=False,
            help="Force garbage collection between each test"),
        optparse.make_option("--complex-text", action="store_true", default=False,
            help="Use the complex text code path for all text (Mac OS X and Windows only)"),
        optparse.make_option("-l", "--leaks", action="store_true", default=False,
            help="Enable leaks checking (Mac OS X only)"),
        optparse.make_option("-g", "--guard-malloc", action="store_true", default=False,
            help="Enable Guard Malloc (Mac OS X only)"),
        optparse.make_option("--threaded", action="store_true", default=False,
            help="Run a concurrent JavaScript thread with each test"),
        optparse.make_option("--webkit-test-runner", "-2", action="store_true",
            help="Use WebKitTestRunner rather than DumpRenderTree."),
        optparse.make_option("--root", action="store",
            help="Path to a pre-built root of WebKit (for running tests using a nightly build of WebKit)"),
    ]))

    option_group_definitions.append(("ORWT Compatibility Options", [
        # FIXME: Remove this option once the bots don't refer to it.
        # results.html is smart enough to figure this out itself.
        _compat_shim_option("--use-remote-links-to-tests"),
    ]))

    option_group_definitions.append(("Results Options", [
        optparse.make_option("-p", "--pixel-tests", action="store_true",
            dest="pixel_tests", help="Enable pixel-to-pixel PNG comparisons"),
        optparse.make_option("--no-pixel-tests", action="store_false",
            dest="pixel_tests", help="Disable pixel-to-pixel PNG comparisons"),
        optparse.make_option("--no-sample-on-timeout", action="store_false",
            dest="sample_on_timeout", help="Don't run sample on timeout (Mac OS X only)"),
        optparse.make_option("--no-ref-tests", action="store_true",
            dest="no_ref_tests", help="Skip all ref tests"),
        optparse.make_option("--tolerance",
            help="Ignore image differences less than this percentage (some "
                "ports may ignore this option)", type="float"),
        optparse.make_option("--results-directory", help="Location of test results"),
        optparse.make_option("--build-directory",
            help="Path to the directory under which build files are kept (should not include configuration)"),
        optparse.make_option("--new-baseline", action="store_true",
            default=False, help="Save generated results as new baselines "
                 "into the *platform* directory, overwriting whatever's "
#.........这里部分代码省略.........

def parse_args(args=None):
    """Provides a default set of command line args.

    Returns a tuple of options, args from optparse"""

    # FIXME: All of these options should be stored closer to the code which
    # FIXME: actually uses them. configuration_options should move
    # FIXME: to WebKitPort and be shared across all scripts.
    configuration_options = [
        optparse.make_option("-t", "--target", dest="configuration",
                             help="(DEPRECATED)"),
        # FIXME: --help should display which configuration is default.
        optparse.make_option('--debug', action='store_const', const='Debug',
                             dest="configuration",
                             help='Set the configuration to Debug'),
        optparse.make_option('--release', action='store_const',
                             const='Release', dest="configuration",
                             help='Set the configuration to Release'),
        # old-run-webkit-tests also accepts -c, --configuration CONFIGURATION.
    ]

    print_options = printing.print_options()

    # FIXME: These options should move onto the ChromiumPort.
    chromium_options = [
        optparse.make_option("--chromium", action="store_true", default=False,
            help="use the Chromium port"),
        optparse.make_option("--startup-dialog", action="store_true",
            default=False, help="create a dialog on DumpRenderTree startup"),
        optparse.make_option("--gp-fault-error-box", action="store_true",
            default=False, help="enable Windows GP fault error box"),
        optparse.make_option("--js-flags",
            type="string", help="JavaScript flags to pass to tests"),
        optparse.make_option("--stress-opt", action="store_true",
            default=False,
            help="Enable additional stress test to JavaScript optimization"),
        optparse.make_option("--stress-deopt", action="store_true",
            default=False,
            help="Enable additional stress test to JavaScript optimization"),
        optparse.make_option("--nocheck-sys-deps", action="store_true",
            default=False,
            help="Don't check the system dependencies (themes)"),
        optparse.make_option("--accelerated-compositing",
            action="store_true",
            help="Use hardware-accelerated compositing for rendering"),
        optparse.make_option("--no-accelerated-compositing",
            action="store_false",
            dest="accelerated_compositing",
            help="Don't use hardware-accelerated compositing for rendering"),
        optparse.make_option("--threaded-compositing",
            action="store_true",
            help="Use threaded compositing for rendering"),
        optparse.make_option("--accelerated-2d-canvas",
            action="store_true",
            help="Use hardware-accelerated 2D Canvas calls"),
        optparse.make_option("--no-accelerated-2d-canvas",
            action="store_false",
            dest="accelerated_2d_canvas",
            help="Don't use hardware-accelerated 2D Canvas calls"),
        optparse.make_option("--accelerated-drawing",
            action="store_true",
            default=False,
            help="Use hardware accelerated drawing of composited pages"),
        optparse.make_option("--enable-hardware-gpu",
            action="store_true",
            default=False,
            help="Run graphics tests on real GPU hardware vs software"),
    ]

    webkit_options = [
        optparse.make_option("--gc-between-tests", action="store_true", default=False,
            help="Force garbage collection between each test"),
        optparse.make_option("--complex-text", action="store_true", default=False,
            help="Use the complex text code path for all text (Mac OS X and Windows only)"),
        optparse.make_option("-l", "--leaks", action="store_true", default=False,
            help="Enable leaks checking (Mac OS X only)"),
        optparse.make_option("-g", "--guard-malloc", action="store_true", default=False,
            help="Enable malloc guard (Mac OS X only)"),
        optparse.make_option("--threaded", action="store_true", default=False,
            help="Run a concurrent JavaScript thread with each test"),
        optparse.make_option("--webkit-test-runner", "-2", action="store_true",
            help="Use WebKitTestRunner rather than DumpRenderTree."),
    ]

    old_run_webkit_tests_compat = [
        # FIXME: Remove this option once the bots don't refer to it.
        # results.html is smart enough to figure this out itself.
        _compat_shim_option("--use-remote-links-to-tests"),
    ]

    results_options = [
        # NEED for bots: --use-remote-links-to-tests Link to test files
        # within the SVN repository in the results.
        optparse.make_option("-p", "--pixel-tests", action="store_true",
            dest="pixel_tests", help="Enable pixel-to-pixel PNG comparisons"),
        optparse.make_option("--no-pixel-tests", action="store_false",
            dest="pixel_tests", help="Disable pixel-to-pixel PNG comparisons"),
        optparse.make_option("--no-sample-on-timeout", action="store_false",
            dest="sample_on_timeout", help="Don't run sample on timeout (Mac OS X only)"),
        optparse.make_option("--tolerance",
#.........这里部分代码省略.........