def start(cron = True):
    """ Start server  """

    # ## get command line arguments

    (options, args) = console()

    print ProgramName
    print ProgramAuthor
    print ProgramVersion

    from sql import drivers
    print 'Database drivers available: %s' % ', '.join(drivers)


    # ## if -L load options from options.config file
    if options.config:
        try:
            options2 = __import__(options.config, [], [], '')
        except Exception:
            try:
                # Jython doesn't like the extra stuff
                options = __import__(options.config)
            except Exception:
                print 'Cannot import config file [%s]' % options.config
                sys.exit(1)
        for key in dir(options2):
            if hasattr(options,key):
                setattr(options,key,getattr(options2,key))

    # ## if -T run doctests (no cron)
    if hasattr(options,'test') and options.test:
        test(options.test, verbose=options.verbose)
        return

    # ## if -S start interactive shell (also no cron)
    if options.shell:
        sys.args = options.args
        run(options.shell, plain=options.plain,
            import_models=options.import_models, startfile=options.run)
        return

    # ## if -C start cron run (extcron) and exit
    # ## if -N or not cron disable cron in this *process*
    # ## if --softcron use softcron
    # ## use hardcron in all ther cases
    if options.extcron:
        print 'Starting extcron...'
        settings.web2py_crontype = 'external'
        extcron = newcron.extcron(os.getcwd())
        extcron.start()
        extcron.join()
        return
    elif cron and not options.nocron and options.softcron:
        print 'Using softcron (but this is not very efficient)'
        settings.web2py_crontype = 'soft'
    elif cron and not options.nocron:
        print 'Starting hardcron...'
        settings.web2py_crontype = 'hard'
        newcron.hardcron(os.getcwd()).start()

    # ## if -W install/start/stop web2py as service
    if options.winservice:
        if os.name == 'nt':
            web2py_windows_service_handler(['', options.winservice],
                    options.config)
        else:
            print 'Error: Windows services not supported on this platform'
            sys.exit(1)
        return

    # ## if no password provided and havetk start Tk interface
    # ## or start interface if we want to put in taskbar (system tray)

    try:
        options.taskbar
    except:
        options.taskbar = False

    if options.taskbar and os.name != 'nt':
        print 'Error: taskbar not supported on this platform'
        sys.exit(1)

    root = None

    if not options.nogui:
        try:
            import tkMessageBox
            import Tkinter
            havetk = True
        except ImportError:
            logger.warn('GUI not available because Tk library is not installed')
            havetk = False

        if options.password == '<ask>' and havetk or options.taskbar and havetk:
            try:
                root = Tkinter.Tk()
            except:
                pass

#.........这里部分代码省略.........

def start(cron=True):
    """ Start server  """

    # ## get command line arguments

    (options, args) = console()

    if not options.nobanner:
        print ProgramName
        print ProgramAuthor
        print ProgramVersion

    from dal import drivers
    if not options.nobanner:
        print 'Database drivers available: %s' % ', '.join(drivers)


    # ## if -L load options from options.config file
    if options.config:
        try:
            options2 = __import__(options.config, {}, {}, '')
        except Exception:
            try:
                # Jython doesn't like the extra stuff
                options2 = __import__(options.config)
            except Exception:
                print 'Cannot import config file [%s]' % options.config
                sys.exit(1)
        for key in dir(options2):
            if hasattr(options,key):
                setattr(options,key,getattr(options2,key))

    if False and not os.path.exists('logging.conf') and \
            os.path.exists('logging.example.conf'):
        import shutil
        sys.stdout.write("Copying logging.conf.example to logging.conf ... ")
        shutil.copyfile('logging.example.conf', 'logging.conf')
        sys.stdout.write("OK\n")

    # ## if -T run doctests (no cron)
    if hasattr(options,'test') and options.test:
        test(options.test, verbose=options.verbose)
        return

    # ## if -S start interactive shell (also no cron)
    if options.shell:
        if not options.args is None:
            sys.argv[:] = options.args
        run(options.shell, plain=options.plain, bpython=options.bpython,
            import_models=options.import_models, startfile=options.run)
        return

    # ## if -C start cron run (extcron) and exit
    # ##    -K specifies optional apps list (overloading scheduler)
    if options.extcron:
        logger.debug('Starting extcron...')
        global_settings.web2py_crontype = 'external'
        if options.scheduler:   # -K
            apps = [app.strip() for app in options.scheduler.split(',') if check_existent_app(options, app.strip())]
        else:
            apps = None
        extcron = newcron.extcron(options.folder, apps=apps)
        extcron.start()
        extcron.join()
        return

    # ## if -K
    if options.scheduler and not options.with_scheduler:
        try:
            start_schedulers(options)
        except KeyboardInterrupt:
            pass
        return


    # ## if -N or not cron disable cron in this *process*
    # ## if --softcron use softcron
    # ## use hardcron in all other cases
    if cron and not options.nocron and options.softcron:
        print 'Using softcron (but this is not very efficient)'
        global_settings.web2py_crontype = 'soft'
    elif cron and not options.nocron:
        logger.debug('Starting hardcron...')
        global_settings.web2py_crontype = 'hard'
        newcron.hardcron(options.folder).start()

    # ## if -W install/start/stop web2py as service
    if options.winservice:
        if os.name == 'nt':
            web2py_windows_service_handler(['', options.winservice],
                    options.config)
        else:
            print 'Error: Windows services not supported on this platform'
            sys.exit(1)
        return

    # ## if no password provided and havetk start Tk interface
    # ## or start interface if we want to put in taskbar (system tray)

    try:
#.........这里部分代码省略.........

def start(cron=True):
    """ Starts server  """

    # ## get command line arguments

    (options, args) = console()

    if not options.nobanner:
        print ProgramName
        print ProgramAuthor
        print ProgramVersion

    from pydal.drivers import DRIVERS
    if not options.nobanner:
        print 'Database drivers available: %s' % ', '.join(DRIVERS)

    # ## if -L load options from options.config file
    if options.config:
        try:
            options2 = __import__(options.config, {}, {}, '')
        except Exception:
            try:
                # Jython doesn't like the extra stuff
                options2 = __import__(options.config)
            except Exception:
                print 'Cannot import config file [%s]' % options.config
                sys.exit(1)
        for key in dir(options2):
            if hasattr(options, key):
                setattr(options, key, getattr(options2, key))

    logfile0 = os.path.join('examples', 'logging.example.conf')
    logfile1 = os.path.join(options.folder, 'logging.conf')
    if not os.path.exists(logfile1) and os.path.exists(logfile0):
        import shutil
        sys.stdout.write("Copying logging.conf.example to logging.conf ... ")
        shutil.copyfile(logfile0, logfile1)
        sys.stdout.write("OK\n")

    # ## if -T run doctests (no cron)
    if hasattr(options, 'test') and options.test:
        test(options.test, verbose=options.verbose)
        return

    # ## if -S start interactive shell (also no cron)
    if options.shell:
        if options.folder:
            os.chdir(options.folder)
        if not options.args is None:
            sys.argv[:] = options.args
        run(options.shell, plain=options.plain, bpython=options.bpython,
            import_models=options.import_models, startfile=options.run,
            cronjob=options.cronjob)
        return

    # ## if -C start cron run (extcron) and exit
    # ##    -K specifies optional apps list (overloading scheduler)
    if options.extcron:
        logger.debug('Starting extcron...')
        global_settings.web2py_crontype = 'external'
        if options.scheduler:   # -K
            apps = [app.strip() for app in options.scheduler.split(
                ',') if check_existent_app(options, app.strip())]
        else:
            apps = None
        extcron = newcron.extcron(options.folder, apps=apps)
        extcron.start()
        extcron.join()
        return

    # ## if -K
    if options.scheduler and not options.with_scheduler:
        try:
            start_schedulers(options)
        except KeyboardInterrupt:
            pass
        return

    # ## if -H cron is enabled in this *process*
    # ## if --softcron use softcron
    # ## use hardcron in all other cases
    if cron and options.runcron and options.softcron:
        print 'Using softcron (but this is not very efficient)'
        global_settings.web2py_crontype = 'soft'
    elif cron and options.runcron:
        logger.debug('Starting hardcron...')
        global_settings.web2py_crontype = 'hard'
        newcron.hardcron(options.folder).start()

    # ## if no password provided and havetk start Tk interface
    # ## or start interface if we want to put in taskbar (system tray)

    try:
        options.taskbar
    except:
        options.taskbar = False

    if options.taskbar and os.name != 'nt':
        print 'Error: taskbar not supported on this platform'
        sys.exit(1)
#.........这里部分代码省略.........

#.........这里部分代码省略.........
        extcron.join()
        return

    # ## if -K
    if options.scheduler and not options.with_scheduler:
        try:
            start_schedulers(options)
        except KeyboardInterrupt:
            pass
        return

    # ## if -W install/start/stop web2py as service
    if options.winservice:
        if os.name == "nt":
            try:
                from winservice import register_service_handler, Web2pyService

                register_service_handler(argv=["", options.winservice], opt_file=options.config, cls=Web2pyService)
            except ImportError:
                print "Error: Missing python module winservice"
                sys.exit(1)
        else:
            print "Error: Windows services not supported on this platform"
            sys.exit(1)
        return

    # ## if -H cron is enabled in this *process*
    # ## if --softcron use softcron
    # ## use hardcron in all other cases
    if cron and options.runcron and options.softcron:
        print "Using softcron (but this is not very efficient)"
        global_settings.web2py_crontype = "soft"
    elif cron and options.runcron:
        logger.debug("Starting hardcron...")
        global_settings.web2py_crontype = "hard"
        newcron.hardcron(options.folder).start()

    # ## if no password provided and havetk start Tk interface
    # ## or start interface if we want to put in taskbar (system tray)

    try:
        options.taskbar
    except:
        options.taskbar = False

    if options.taskbar and os.name != "nt":
        print "Error: taskbar not supported on this platform"
        sys.exit(1)

    root = None

    if not options.nogui:
        try:
            import Tkinter

            havetk = True
        except ImportError:
            logger.warn("GUI not available because Tk library is not installed")
            havetk = False
            options.nogui = True

        if options.password == "<ask>" and havetk or options.taskbar and havetk:
            try:
                root = Tkinter.Tk()
            except:
                pass