def main()

in VMBackup/main/WaagentLib.py [0:0]
76 lines of code
26 McCabe index (conditional complexity)

def main():
    """
    Instantiate MyDistro, exit if distro class is not defined.
    Parse command-line arguments, exit with usage() on error.
    Instantiate ConfigurationProvider.
    Call appropriate non-daemon methods and exit.
    If daemon mode, enter Agent.Run() loop.
    """
    if GuestAgentVersion == "":
        print("WARNING! This is a non-standard agent that does not include a valid version string.")

    if len(sys.argv) == 1:
        sys.exit(Usage())

    LoggerInit('/var/log/waagent.log', '/dev/console')
    global LinuxDistro
    LinuxDistro = DistInfo()[0]

    global MyDistro
    MyDistro = GetMyDistro()
    if MyDistro == None:
        sys.exit(1)
    args = []
    conf_file = None
    global force
    force = False
    for a in sys.argv[1:]:
        if re.match("^([-/]*)(help|usage|\\?)", a):
            sys.exit(Usage())
        elif re.match("^([-/]*)version", a):
            print(GuestAgentVersion + " running on " + LinuxDistro)
            sys.exit(0)
        elif re.match("^([-/]*)verbose", a):
            myLogger.verbose = True
        elif re.match("^([-/]*)force", a):
            force = True
        elif re.match("^(?:[-/]*)conf=.+", a):
            conf_file = re.match("^(?:[-/]*)conf=(.+)", a).groups()[0]
        elif re.match("^([-/]*)(setup|install)", a):
            sys.exit(MyDistro.Install())
        elif re.match("^([-/]*)(uninstall)", a):
            sys.exit(Uninstall())
        else:
            args.append(a)
    global Config
    Config = ConfigurationProvider(conf_file)

    logfile = Config.get("Logs.File")
    if logfile is not None:
        myLogger.file_path = logfile
    logconsole = Config.get("Logs.Console")
    if logconsole is not None and logconsole.lower().startswith("n"):
        myLogger.con_path = None
    verbose = Config.get("Logs.Verbose")
    if verbose != None and verbose.lower().startswith("y"):
        myLogger.verbose = True
    global daemon
    daemon = False
    for a in args:
        if re.match("^([-/]*)deprovision\\+user", a):
            sys.exit(Deprovision(force, True))
        elif re.match("^([-/]*)deprovision", a):
            sys.exit(Deprovision(force, False))
        elif re.match("^([-/]*)daemon", a):
            daemon = True
        elif re.match("^([-/]*)serialconsole", a):
            AppendToLinuxKernelCmdline("console=ttyS0 earlyprintk=ttyS0")
            Log("Configured kernel to use ttyS0 as the boot console.")
            sys.exit(0)
        else:
            print("Invalid command line parameter:" + a)
            sys.exit(1)

    if daemon == False:
        sys.exit(Usage())
    global modloaded
    modloaded = False

    while True:
        try:
            SwitchCwd()
            Log(GuestAgentLongName + " Version: " + GuestAgentVersion)
            if IsLinux():
                Log("Linux Distribution Detected      : " + LinuxDistro)
        except Exception as e:
            Error(traceback.format_exc())
            Error("Exception: " + str(e))
            Log("Restart agent in 15 seconds")
            time.sleep(15)