Golang FlagSet.NArg方法代碼示例

func (cmd *add) Run(ctx context.Context, f *flag.FlagSet) error {
	if f.NArg() == 0 {
		return flag.ErrHelp
	}

	name := f.Arg(0)

	finder, err := cmd.Finder()
	if err != nil {
		return err
	}

	net, err := finder.Network(ctx, cmd.path)
	if err != nil {
		return err
	}

	dvs, ok := net.(*object.DistributedVirtualSwitch)
	if !ok {
		return fmt.Errorf("%s (%T) is not of type %T", cmd.path, net, dvs)
	}

	cmd.DVPortgroupConfigSpec.Name = name

	task, err := dvs.AddPortgroup(ctx, []types.DVPortgroupConfigSpec{cmd.DVPortgroupConfigSpec})
	if err != nil {
		return err
	}

	logger := cmd.ProgressLogger(fmt.Sprintf("adding %s portgroup to dvs %s... ", name, dvs.InventoryPath))
	defer logger.Wait()

	_, err = task.WaitForResult(ctx, logger)
	return err
}

func (cmd *rename) Run(f *flag.FlagSet) error {
	if f.NArg() != 2 {
		return flag.ErrHelp
	}

	ctx := context.TODO()

	c, err := cmd.Client()
	if err != nil {
		return err
	}

	m, err := object.GetCustomFieldsManager(c)
	if err != nil {
		return err
	}

	key, err := m.FindKey(ctx, f.Arg(0))
	if err != nil {
		return err
	}

	name := f.Arg(1)

	return m.Rename(ctx, key, name)
}

func (cmd *change) Run(f *flag.FlagSet) error {
	if f.NArg() == 0 {
		return flag.ErrHelp
	}

	finder, err := cmd.Finder()
	if err != nil {
		return err
	}

	cmd.SetAllocation(func(a types.BaseResourceAllocationInfo) {
		ra := a.GetResourceAllocationInfo()
		if ra.Shares.Level == "" {
			ra.Shares = nil
		}
	})

	for _, arg := range f.Args() {
		pools, err := finder.ResourcePoolList(context.TODO(), arg)
		if err != nil {
			return err
		}

		for _, pool := range pools {
			err := pool.UpdateConfig(context.TODO(), cmd.name, &cmd.ResourceConfigSpec)
			if err != nil {
				return err
			}
		}
	}

	return nil
}

func multisnapshotCmd(mysqld *mysqlctl.Mysqld, subFlags *flag.FlagSet, args []string) {
	concurrency := subFlags.Int("concurrency", 8, "how many compression jobs to run simultaneously")
	spec := subFlags.String("spec", "-", "shard specification")
	tablesString := subFlags.String("tables", "", "dump only this comma separated list of tables")
	skipSlaveRestart := subFlags.Bool("skip-slave-restart", false, "after the snapshot is done, do not restart slave replication")
	maximumFilesize := subFlags.Uint64("maximum-file-size", 128*1024*1024, "the maximum size for an uncompressed data file")
	subFlags.Parse(args)
	if subFlags.NArg() != 2 {
		relog.Fatal("action multisnapshot requires <db name> <key name>")
	}

	shards, err := key.ParseShardingSpec(*spec)
	if err != nil {
		relog.Fatal("multisnapshot failed: %v", err)
	}
	var tables []string
	if *tablesString != "" {
		tables = strings.Split(*tablesString, ",")
	}
	filenames, err := mysqld.CreateMultiSnapshot(shards, subFlags.Arg(0), subFlags.Arg(1), tabletAddr, false, *concurrency, tables, *skipSlaveRestart, *maximumFilesize, nil)
	if err != nil {
		relog.Fatal("multisnapshot failed: %v", err)
	} else {
		relog.Info("manifest locations: %v", filenames)
	}
}

func (cmd *service) Run(ctx context.Context, f *flag.FlagSet) error {
	if f.NArg() != 2 {
		return flag.ErrHelp
	}

	service := f.Arg(0)
	device := f.Arg(1)

	host, err := cmd.HostSystem()
	if err != nil {
		return err
	}

	m, err := host.ConfigManager().VirtualNicManager(ctx)
	if err != nil {
		return err
	}

	var method func(context.Context, string, string) error

	if cmd.Enable {
		method = m.SelectVnic
	} else if cmd.Disable {
		method = m.DeselectVnic
	}

	if method == nil {
		return flag.ErrHelp
	}

	return method(ctx, service, device)
}

func commandVtGateSplitQuery(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
	server := subFlags.String("server", "", "VtGate server to connect to")
	bindVariables := newBindvars(subFlags)
	connectTimeout := subFlags.Duration("connect_timeout", 30*time.Second, "Connection timeout for vtgate client")
	splitColumn := subFlags.String("split_column", "", "force the use of this column to split the query")
	splitCount := subFlags.Int("split_count", 16, "number of splits to generate")
	keyspace := subFlags.String("keyspace", "", "keyspace to send query to")
	if err := subFlags.Parse(args); err != nil {
		return err
	}
	if subFlags.NArg() != 1 {
		return fmt.Errorf("the <sql> argument is required for the VtGateSplitQuery command")
	}

	vtgateConn, err := vtgateconn.Dial(ctx, *server, *connectTimeout, "")
	if err != nil {
		return fmt.Errorf("error connecting to vtgate '%v': %v", *server, err)
	}
	defer vtgateConn.Close()
	r, err := vtgateConn.SplitQuery(ctx, *keyspace, subFlags.Arg(0), *bindVariables, *splitColumn, int64(*splitCount))
	if err != nil {
		return fmt.Errorf("SplitQuery failed: %v", err)
	}
	return printJSON(wr.Logger(), r)
}

func commandEmergencyReparentShard(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
	waitSlaveTimeout := subFlags.Duration("wait_slave_timeout", 30*time.Second, "time to wait for slaves to catch up in reparenting")
	keyspaceShard := subFlags.String("keyspace_shard", "", "keyspace/shard of the shard that needs to be reparented")
	newMaster := subFlags.String("new_master", "", "alias of a tablet that should be the new master")
	if err := subFlags.Parse(args); err != nil {
		return err
	}
	if subFlags.NArg() == 2 {
		// Legacy syntax: "<keyspace/shard> <tablet alias>".
		if *newMaster != "" {
			return fmt.Errorf("cannot use legacy syntax and flag -new_master for action EmergencyReparentShard at the same time")
		}
		*keyspaceShard = subFlags.Arg(0)
		*newMaster = subFlags.Arg(1)
	} else if subFlags.NArg() != 0 {
		return fmt.Errorf("action EmergencyReparentShard requires -keyspace_shard=<keyspace/shard> -new_master=<tablet alias>")
	}

	keyspace, shard, err := topoproto.ParseKeyspaceShard(*keyspaceShard)
	if err != nil {
		return err
	}
	tabletAlias, err := topoproto.ParseTabletAlias(*newMaster)
	if err != nil {
		return err
	}
	return wr.EmergencyReparentShard(ctx, keyspace, shard, tabletAlias, *waitSlaveTimeout)
}

func (cmd *add) Run(f *flag.FlagSet) error {
	var ctx = context.Background()

	if f.NArg() != 0 {
		return flag.ErrHelp
	}

	finder, err := cmd.Finder()
	if err != nil {
		return err
	}

	cluster, err := finder.ClusterComputeResource(ctx, cmd.cluster)
	if err != nil {
		return nil
	}

	err = cmd.Add(ctx, cluster)

	if err == nil {
		return nil
	}

	// Check if we failed due to SSLVerifyFault and -noverify is set
	if err := cmd.AcceptThumbprint(err); err != nil {
		return err
	}

	// Accepted unverified thumbprint, try again
	return cmd.Add(ctx, cluster)
}

func (cmd *destroy) Run(ctx context.Context, f *flag.FlagSet) error {
	if f.NArg() == 0 {
		return flag.ErrHelp
	}

	finder, err := cmd.Finder()
	if err != nil {
		return err
	}

	for _, arg := range f.Args() {
		folders, err := finder.FolderList(ctx, arg)
		if err != nil {
			return err
		}

		for _, folder := range folders {
			task, err := folder.Destroy(ctx)
			if err != nil {
				return err
			}

			err = task.Wait(ctx)
			if err != nil {
				return err
			}
		}
	}

	return nil
}

func commandVtGateExecute(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
	server := subFlags.String("server", "", "VtGate server to connect to")
	bindVariables := newBindvars(subFlags)
	connectTimeout := subFlags.Duration("connect_timeout", 30*time.Second, "Connection timeout for vtgate client")
	tabletType := subFlags.String("tablet_type", "master", "tablet type to query")
	json := subFlags.Bool("json", false, "Output JSON instead of human-readable table")

	if err := subFlags.Parse(args); err != nil {
		return err
	}
	if subFlags.NArg() != 1 {
		return fmt.Errorf("the <sql> argument is required for the VtGateExecute command")
	}
	t, err := parseTabletType(*tabletType, []topodatapb.TabletType{topodatapb.TabletType_MASTER, topodatapb.TabletType_REPLICA, topodatapb.TabletType_RDONLY})
	if err != nil {
		return err
	}

	vtgateConn, err := vtgateconn.Dial(ctx, *server, *connectTimeout)
	if err != nil {
		return fmt.Errorf("error connecting to vtgate '%v': %v", *server, err)
	}
	defer vtgateConn.Close()
	qr, err := vtgateConn.Execute(ctx, subFlags.Arg(0), *bindVariables, t)
	if err != nil {
		return fmt.Errorf("Execute failed: %v", err)
	}
	if *json {
		return printJSON(wr.Logger(), qr)
	}
	printQueryResult(loggerWriter{wr.Logger()}, qr)
	return nil
}

func (cmd *env) Run(ctx context.Context, f *flag.FlagSet) error {
	env := envResult(cmd.ClientFlag.Environ(cmd.extra))

	if f.NArg() > 1 {
		return flag.ErrHelp
	}

	// Option to just output the value, example use:
	// password=$(govc env GOVC_PASSWORD)
	if f.NArg() == 1 {
		var output []string

		prefix := fmt.Sprintf("%s=", f.Arg(0))

		for _, e := range env {
			if strings.HasPrefix(e, prefix) {
				output = append(output, e[len(prefix):])
				break
			}
		}

		return cmd.WriteResult(envResult(output))
	}

	return cmd.WriteResult(env)
}

func (cmd *upload) Run(ctx context.Context, f *flag.FlagSet) error {
	if f.NArg() != 2 {
		return flag.ErrHelp
	}

	m, err := cmd.FileManager()
	if err != nil {
		return err
	}

	src := f.Arg(0)
	dst := f.Arg(1)

	var size int64
	var buf *bytes.Buffer

	if src == "-" {
		buf = new(bytes.Buffer)
		size, err = io.Copy(buf, os.Stdin)
		if err != nil {
			return err
		}
	} else {
		s, err := os.Stat(src)
		if err != nil {
			return err
		}
		size = s.Size()
	}

	url, err := m.InitiateFileTransferToGuest(ctx, cmd.Auth(), dst, cmd.Attr(), size, cmd.overwrite)
	if err != nil {
		return err
	}

	u, err := cmd.ParseURL(url)
	if err != nil {
		return err
	}

	c, err := cmd.Client()
	if err != nil {
		return nil
	}

	p := soap.DefaultUpload

	if buf != nil {
		p.ContentLength = size
		return c.Client.Upload(buf, u, &p)
	}

	if cmd.OutputFlag.TTY {
		logger := cmd.ProgressLogger("Uploading... ")
		p.Progress = logger
		defer logger.Wait()
	}

	return c.Client.UploadFile(src, u, nil)
}

func (cmd *revert) Run(ctx context.Context, f *flag.FlagSet) error {
	if f.NArg() > 1 {
		return flag.ErrHelp
	}

	vm, err := cmd.VirtualMachine()
	if err != nil {
		return err
	}

	if vm == nil {
		return flag.ErrHelp
	}

	var task *object.Task

	if f.NArg() == 1 {
		task, err = vm.RevertToSnapshot(ctx, f.Arg(0), cmd.suppressPowerOn)
	} else {
		task, err = vm.RevertToCurrentSnapshot(ctx, cmd.suppressPowerOn)
	}

	if err != nil {
		return err
	}

	return task.Wait(ctx)
}

func (cmd *insert) Run(ctx context.Context, f *flag.FlagSet) error {
	vm, err := cmd.VirtualMachine()
	if err != nil {
		return err
	}

	if vm == nil || f.NArg() != 1 {
		return flag.ErrHelp
	}

	devices, err := vm.Device(ctx)
	if err != nil {
		return err
	}

	c, err := devices.FindFloppy(cmd.device)
	if err != nil {
		return err
	}

	img, err := cmd.DatastorePath(f.Arg(0))
	if err != nil {
		return nil
	}

	return vm.EditDevice(ctx, devices.InsertImg(c, img))
}

func (cmd *create) Run(ctx context.Context, f *flag.FlagSet) error {
	if f.NArg() != 1 {
		return flag.ErrHelp
	}

	name := f.Arg(0)

	cmd.configSpec.Name = name

	folder, err := cmd.FolderOrDefault("network")
	if err != nil {
		return err
	}

	task, err := folder.CreateDVS(ctx, cmd.DVSCreateSpec)
	if err != nil {
		return err
	}

	logger := cmd.ProgressLogger(fmt.Sprintf("adding %s to folder %s... ", name, folder.InventoryPath))
	defer logger.Wait()

	_, err = task.WaitForResult(ctx, logger)
	return err
}