How to use the zulip.integrations.perforce.git_p4.P4Sync function in zulip

else:
            return ""

def printUsage(commands):
    print("usage: %s  [options]" % sys.argv[0])
    print("")
    print("valid commands: %s" % ", ".join(commands))
    print("")
    print("Try %s  --help for command specific help." % sys.argv[0])
    print("")

commands = {
    "debug" : P4Debug,
    "submit" : P4Submit,
    "commit" : P4Submit,
    "sync" : P4Sync,
    "rebase" : P4Rebase,
    "clone" : P4Clone,
    "rollback" : P4RollBack,
    "branches" : P4Branches
}


def main():
    if len(sys.argv[1:]) == 0:
        printUsage(list(commands.keys()))
        sys.exit(2)

    cmdName = sys.argv[1]
    try:
        klass = commands[cmdName]
        cmd = klass()

def run(self, args):
        sync = P4Sync()
        sync.importLabels = self.importLabels
        sync.run([])

        return self.rebase()

def __init__(self):
        P4Sync.__init__(self)
        self.description = "Creates a new git repository and imports from Perforce into it"
        self.usage = "usage: %prog [options] //depot/path[@revRange]"
        self.options += [
            optparse.make_option("--destination", dest="cloneDestination",
                                 action='store', default=None,
                                 help="where to leave result of the clone"),
            optparse.make_option("-/", dest="cloneExclude",
                                 action="append", type="string",
                                 help="exclude depot path"),
            optparse.make_option("--bare", dest="cloneBare",
                                 action="store_true", default=False),
        ]
        self.cloneDestination = None
        self.needsGit = False
        self.cloneBare = False

print("Quitting")
                            quit = True
                            break
                    if quit:
                        break

        chdir(self.oldWorkingDirectory)

        if self.dry_run:
            pass
        elif self.prepare_p4_only:
            pass
        elif len(commits) == len(applied):
            print("All commits applied!")

            sync = P4Sync()
            if self.branch:
                sync.branch = self.branch
            sync.run([])

            rebase = P4Rebase()
            rebase.rebase()

        else:
            if len(applied) == 0:
                print("No commits applied.")
            else:
                print("Applied only the commits marked with '*':")
                for c in commits:
                    if c in applied:
                        star = "*"
                    else:

self.cloneDestination = self.defaultDestination(args)

        print("Importing from %s into %s" % (', '.join(depotPaths), self.cloneDestination))

        if not os.path.exists(self.cloneDestination):
            os.makedirs(self.cloneDestination)
        chdir(self.cloneDestination)

        init_cmd = [ "git", "init" ]
        if self.cloneBare:
            init_cmd.append("--bare")
        retcode = subprocess.call(init_cmd)
        if retcode:
            raise CalledProcessError(retcode, init_cmd)

        if not P4Sync.run(self, depotPaths):
            return False

        # create a master branch and check out a work tree
        if gitBranchExists(self.branch):
            system([ "git", "branch", "master", self.branch ])
            if not self.cloneBare:
                system([ "git", "checkout", "-f" ])
        else:
            print('Not checking out any branch, use ' \
                  '"git checkout -q -b master "')

        # auto-set this variable if invoked with --use-client-spec
        if self.useClientSpec_from_options:
            system("git config --bool git-p4.useclientspec true")

        return True

die("You have uncommitted changes. Please commit them before rebasing or stash them away with git stash.");

        [upstream, settings] = findUpstreamBranchPoint()
        if len(upstream) == 0:
            die("Cannot find upstream branchpoint for rebase")

        # the branchpoint may be p4/foo~3, so strip off the parent
        upstream = re.sub("~[0-9]+$", "", upstream)

        print("Rebasing the current branch onto %s" % upstream)
        oldHead = read_pipe("git rev-parse HEAD").strip()
        system("git rebase %s" % upstream)
        system("git diff-tree --stat --summary -M %s HEAD" % oldHead)
        return True

class P4Clone(P4Sync):
    def __init__(self):
        P4Sync.__init__(self)
        self.description = "Creates a new git repository and imports from Perforce into it"
        self.usage = "usage: %prog [options] //depot/path[@revRange]"
        self.options += [
            optparse.make_option("--destination", dest="cloneDestination",
                                 action='store', default=None,
                                 help="where to leave result of the clone"),
            optparse.make_option("-/", dest="cloneExclude",
                                 action="append", type="string",
                                 help="exclude depot path"),
            optparse.make_option("--bare", dest="cloneBare",
                                 action="store_true", default=False),
        ]
        self.cloneDestination = None
        self.needsGit = False