Golang FlagSet.Arg方法代碼示例

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

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

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

	key := f.Arg(0)

	if cmd.cert == "-" {
		b, err := ioutil.ReadAll(os.Stdin)
		if err != nil {
			return err
		}
		cmd.cert = string(b)
	} else if cmd.cert == "+" {
		if err := cmd.create(key); err != nil {
			return fmt.Errorf("creating certificate: %s", err)
		}
		cmd.cert = cmd.encodedCert.String()
	}

	return m.SetCertificate(ctx, key, cmd.cert)
}

func (cmd *insert) Run(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(context.TODO())
	if err != nil {
		return err
	}

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

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

	return vm.EditDevice(context.TODO(), devices.InsertIso(c, iso))
}

func (cmd *ovfx) Prepare(f *flag.FlagSet) (string, error) {
	var err error

	args := f.Args()
	if len(args) != 1 {
		return "", errors.New("no file specified")
	}

	cmd.Client, err = cmd.DatastoreFlag.Client()
	if err != nil {
		return "", err
	}

	cmd.Datacenter, err = cmd.DatastoreFlag.Datacenter()
	if err != nil {
		return "", err
	}

	cmd.Datastore, err = cmd.DatastoreFlag.Datastore()
	if err != nil {
		return "", err
	}

	cmd.ResourcePool, err = cmd.ResourcePoolFlag.ResourcePool()
	if err != nil {
		return "", err
	}

	return f.Arg(0), 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 commandVtTabletRollback(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
	connectTimeout := subFlags.Duration("connect_timeout", 30*time.Second, "Connection timeout for vttablet client")
	if err := subFlags.Parse(args); err != nil {
		return err
	}
	if subFlags.NArg() != 2 {
		return fmt.Errorf("the <tablet_alias> and <transaction_id> arguments are required for the VtTabletRollback command")
	}
	transactionID, err := strconv.ParseInt(subFlags.Arg(1), 10, 64)
	if err != nil {
		return err
	}
	tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
	if err != nil {
		return err
	}
	tabletInfo, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
	if err != nil {
		return err
	}

	conn, err := tabletconn.GetDialer()(tabletInfo.Tablet, *connectTimeout)
	if err != nil {
		return fmt.Errorf("cannot connect to tablet %v: %v", tabletAlias, err)
	}
	defer conn.Close(ctx)

	return conn.Rollback(ctx, &querypb.Target{
		Keyspace:   tabletInfo.Tablet.Keyspace,
		Shard:      tabletInfo.Tablet.Shard,
		TabletType: tabletInfo.Tablet.Type,
	}, transactionID)
}

func commandSplitClone(wi *Instance, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) (Worker, error) {
	online := subFlags.Bool("online", defaultOnline, "do online copy (optional approximate copy, source and destination tablets will not be put out of serving, minimizes downtime during offline copy)")
	offline := subFlags.Bool("offline", defaultOffline, "do offline copy (exact copy at a specific GTID, required before shard migration, source and destination tablets will be put out of serving during copy)")
	excludeTables := subFlags.String("exclude_tables", "", "comma separated list of tables to exclude")
	strategy := subFlags.String("strategy", "", "which strategy to use for restore, use 'vtworker SplitClone --strategy=-help k/s' for more info")
	sourceReaderCount := subFlags.Int("source_reader_count", defaultSourceReaderCount, "number of concurrent streaming queries to use on the source")
	writeQueryMaxRows := subFlags.Int("write_query_max_rows", defaultWriteQueryMaxRows, "maximum number of rows per write query")
	writeQueryMaxSize := subFlags.Int("write_query_max_size", defaultWriteQueryMaxSize, "maximum size (in bytes) per write query")
	writeQueryMaxRowsDelete := subFlags.Int("write_query_max_rows_delete", defaultWriteQueryMaxRows, "maximum number of rows per DELETE FROM write query")
	minTableSizeForSplit := subFlags.Int("min_table_size_for_split", defaultMinTableSizeForSplit, "tables bigger than this size on disk in bytes will be split into source_reader_count chunks if possible")
	destinationWriterCount := subFlags.Int("destination_writer_count", defaultDestinationWriterCount, "number of concurrent RPCs to execute on the destination")
	minHealthyRdonlyTablets := subFlags.Int("min_healthy_rdonly_tablets", defaultMinHealthyRdonlyTablets, "minimum number of healthy RDONLY tablets in the source and destination shard at start")
	maxTPS := subFlags.Int64("max_tps", defaultMaxTPS, "if non-zero, limit copy to maximum number of (write) transactions/second on the destination (unlimited by default)")
	if err := subFlags.Parse(args); err != nil {
		return nil, err
	}
	if subFlags.NArg() != 1 {
		subFlags.Usage()
		return nil, fmt.Errorf("command SplitClone requires <keyspace/shard>")
	}

	keyspace, shard, err := topoproto.ParseKeyspaceShard(subFlags.Arg(0))
	if err != nil {
		return nil, err
	}
	var excludeTableArray []string
	if *excludeTables != "" {
		excludeTableArray = strings.Split(*excludeTables, ",")
	}
	worker, err := NewSplitCloneWorker(wr, wi.cell, keyspace, shard, *online, *offline, excludeTableArray, *strategy, *sourceReaderCount, *writeQueryMaxRows, *writeQueryMaxSize, *writeQueryMaxRowsDelete, uint64(*minTableSizeForSplit), *destinationWriterCount, *minHealthyRdonlyTablets, *maxTPS)
	if err != nil {
		return nil, fmt.Errorf("cannot create split clone worker: %v", err)
	}
	return worker, 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 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 *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 *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 *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 commandRestoreFromBackup(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
	if err := subFlags.Parse(args); err != nil {
		return err
	}
	if subFlags.NArg() != 1 {
		return fmt.Errorf("The RestoreFromBackup command requires the <tablet alias> argument.")
	}

	tabletAlias, err := topoproto.ParseTabletAlias(subFlags.Arg(0))
	if err != nil {
		return err
	}
	tabletInfo, err := wr.TopoServer().GetTablet(ctx, tabletAlias)
	if err != nil {
		return err
	}
	stream, err := wr.TabletManagerClient().RestoreFromBackup(ctx, tabletInfo.Tablet)
	if err != nil {
		return err
	}
	for {
		e, err := stream.Recv()
		switch err {
		case nil:
			logutil.LogEvent(wr.Logger(), e)
		case io.EOF:
			return nil
		default:
			return err
		}
	}
}

func commandListBackups(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
	if err := subFlags.Parse(args); err != nil {
		return err
	}
	if subFlags.NArg() != 1 {
		return fmt.Errorf("action ListBackups requires <keyspace/shard>")
	}

	keyspace, shard, err := topoproto.ParseKeyspaceShard(subFlags.Arg(0))
	if err != nil {
		return err
	}
	bucket := fmt.Sprintf("%v/%v", keyspace, shard)

	bs, err := backupstorage.GetBackupStorage()
	if err != nil {
		return err
	}
	defer bs.Close()
	bhs, err := bs.ListBackups(bucket)
	if err != nil {
		return err
	}
	for _, bh := range bhs {
		wr.Logger().Printf("%v\n", bh.Name())
	}
	return nil
}

func commandVtGateExecuteShards(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")
	keyspace := subFlags.String("keyspace", "", "keyspace to send query to")
	shardsStr := subFlags.String("shards", "", "comma-separated list of shards 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 VtGateExecuteShards command")
	}
	t, err := parseTabletType(*tabletType, []pb.TabletType{pb.TabletType_MASTER, pb.TabletType_REPLICA, pb.TabletType_RDONLY})
	if err != nil {
		return err
	}
	var shards []string
	if *shardsStr != "" {
		shards = strings.Split(*shardsStr, ",")
	}

	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.ExecuteShards(ctx, subFlags.Arg(0), *keyspace, shards, *bindVariables, t)
	if err != nil {
		return fmt.Errorf("Execute failed: %v", err)
	}
	return printJSON(wr, qr)
}