Golang FlagSet.Args方法代码示例

// ParseExec parses the specified args for the specified command and generates
// an ExecConfig from it.
// If the minimal number of specified args is not right or if specified args are
// not valid, it will return an error.
func ParseExec(cmd *flag.FlagSet, args []string) (*types.ExecConfig, error) {
	var (
		flStdin      = cmd.Bool([]string{"i", "-interactive"}, false, "Keep STDIN open even if not attached")
		flTty        = cmd.Bool([]string{"t", "-tty"}, false, "Allocate a pseudo-TTY")
		flDetach     = cmd.Bool([]string{"d", "-detach"}, false, "Detached mode: run command in the background")
		flUser       = cmd.String([]string{"u", "-user"}, "", "Username or UID (format: <name|uid>[:<group|gid>])")
		flPrivileged = cmd.Bool([]string{"-privileged"}, false, "Give extended privileges to the command")
		execCmd      []string
	)
	cmd.Require(flag.Min, 2)
	if err := cmd.ParseFlags(args, true); err != nil {
		return nil, err
	}
	parsedArgs := cmd.Args()
	execCmd = parsedArgs[1:]

	execConfig := &types.ExecConfig{
		User:       *flUser,
		Privileged: *flPrivileged,
		Tty:        *flTty,
		Cmd:        execCmd,
		Detach:     *flDetach,
	}

	// If -d is not set, attach to everything by default
	if !*flDetach {
		execConfig.AttachStdout = true
		execConfig.AttachStderr = true
		if *flStdin {
			execConfig.AttachStdin = true
		}
	}

	return execConfig, nil
}

func parseRun(cmd *flag.FlagSet, args []string) (*docker.CreateContainerOptions, error) {
	var (
		flStdin  = cmd.Bool([]string{"i", "-interactive"}, false, "Keep STDIN open even if not attached")
		flTty    = cmd.Bool([]string{"t", "-tty"}, false, "Allocate a pseudo-TTY")
		flDetach = cmd.Bool([]string{"d", "-detach"}, false, "[NOT SUPPORTED] Run container in background and print container ID")
		flName   = cmd.String([]string{"-name"}, "", "Assign a name to the container")
		// the caller should handle "-rm" with cmd.IsSet()
		_ = cmd.Bool([]string{"-rm"}, false, "Automatically remove the container when it exits")
		// the caller should handle "-eq-config"
		_ = cmd.String([]string{"-eq-config"}, "", "Earthquake configuration file")
	)
	if err := cmd.Parse(args); err != nil {
		return nil, err
	}
	if !*flStdin {
		return nil, fmt.Errorf("-interactive is expected.")
	}
	if !*flTty {
		return nil, fmt.Errorf("-tty is expected.")
	}
	if *flDetach {
		return nil, fmt.Errorf("Currently, -detach is not supported.")
	}

	parsedArgs := cmd.Args()
	if len(parsedArgs) < 2 {
		return nil, fmt.Errorf("requires a minimum of 2 arguments")
	}
	image := parsedArgs[0]
	execCmd := parsedArgs[1:]

	dockerOpt := docker.CreateContainerOptions{
		Name: *flName,
		Config: &docker.Config{
			Image:        image,
			Cmd:          execCmd,
			OpenStdin:    *flStdin,
			StdinOnce:    true,
			AttachStdin:  true,
			AttachStdout: true,
			AttachStderr: true,
			Tty:          *flTty,
		},
		HostConfig: &docker.HostConfig{},
	}
	return &dockerOpt, nil
}

func ParseExec(cmd *flag.FlagSet, args []string) (*ExecConfig, error) {
	var (
		flStdin   = cmd.Bool([]string{"i", "-interactive"}, false, "Keep STDIN open even if not attached")
		flTty     = cmd.Bool([]string{"t", "-tty"}, false, "Allocate a pseudo-TTY")
		flDetach  = cmd.Bool([]string{"d", "-detach"}, false, "Detached mode: run command in the background")
		execCmd   []string
		container string
	)
	if err := cmd.Parse(args); err != nil {
		return nil, err
	}
	parsedArgs := cmd.Args()
	if len(parsedArgs) > 1 {
		container = cmd.Arg(0)
		execCmd = parsedArgs[1:]
	}

	execConfig := &ExecConfig{
		// TODO(vishh): Expose '-u' flag once it is supported.
		User: "",
		// TODO(vishh): Expose '-p' flag once it is supported.
		Privileged: false,
		Tty:        *flTty,
		Cmd:        execCmd,
		Container:  container,
		Detach:     *flDetach,
	}

	// If -d is not set, attach to everything by default
	if !*flDetach {
		execConfig.AttachStdout = true
		execConfig.AttachStderr = true
		if *flStdin {
			execConfig.AttachStdin = true
		}
	}

	return execConfig, nil
}

func ParseExec(cmd *flag.FlagSet, args []string) (*ExecConfig, error) {
	var (
		flStdin   = cmd.Bool([]string{"i", "-interactive"}, false, "Keep STDIN open even if not attached")
		flTty     = cmd.Bool([]string{"t", "-tty"}, false, "Allocate a pseudo-TTY")
		flDetach  = cmd.Bool([]string{"d", "-detach"}, false, "Detached mode: run command in the background")
		flUser    = cmd.String([]string{"u", "-user"}, "", "Username or UID (format: <name|uid>[:<group|gid>])")
		execCmd   []string
		container string
	)
	cmd.Require(flag.Min, 2)
	if err := cmd.ParseFlags(args, true); err != nil {
		return nil, err
	}
	container = cmd.Arg(0)
	parsedArgs := cmd.Args()
	execCmd = parsedArgs[1:]

	execConfig := &ExecConfig{
		User: *flUser,
		// TODO(vishh): Expose 'Privileged' once it is supported.
		// +		//Privileged:   job.GetenvBool("Privileged"),
		Tty:       *flTty,
		Cmd:       execCmd,
		Container: container,
		Detach:    *flDetach,
	}

	// If -d is not set, attach to everything by default
	if !*flDetach {
		execConfig.AttachStdout = true
		execConfig.AttachStderr = true
		if *flStdin {
			execConfig.AttachStdin = true
		}
	}

	return execConfig, nil
}

//.........这里部分代码省略.........
	if *flKernelMemory != "" {
		KernelMemory, err = units.RAMInBytes(*flKernelMemory)
		if err != nil {
			return nil, nil, cmd, err
		}
	}

	swappiness := *flSwappiness
	if swappiness != -1 && (swappiness < 0 || swappiness > 100) {
		return nil, nil, cmd, fmt.Errorf("Invalid value: %d. Valid memory swappiness range is 0-100", swappiness)
	}

	var parsedShm *int64
	if *flShmSize != "" {
		shmSize, err := units.RAMInBytes(*flShmSize)
		if err != nil {
			return nil, nil, cmd, err
		}
		parsedShm = &shmSize
	}

	var binds []string
	// add any bind targets to the list of container volumes
	for bind := range flVolumes.GetMap() {
		if arr := volume.SplitN(bind, 2); len(arr) > 1 {
			// after creating the bind mount we want to delete it from the flVolumes values because
			// we do not want bind mounts being committed to image configs
			binds = append(binds, bind)
			flVolumes.Delete(bind)
		}
	}

	var (
		parsedArgs = cmd.Args()
		runCmd     *stringutils.StrSlice
		entrypoint *stringutils.StrSlice
		image      = cmd.Arg(0)
	)
	if len(parsedArgs) > 1 {
		runCmd = stringutils.NewStrSlice(parsedArgs[1:]...)
	}
	if *flEntrypoint != "" {
		entrypoint = stringutils.NewStrSlice(*flEntrypoint)
	}

	var (
		domainname string
		hostname   = *flHostname
		parts      = strings.SplitN(hostname, ".", 2)
	)
	if len(parts) > 1 {
		hostname = parts[0]
		domainname = parts[1]
	}

	ports, portBindings, err := nat.ParsePortSpecs(flPublish.GetAll())
	if err != nil {
		return nil, nil, cmd, err
	}

	// Merge in exposed ports to the map of published ports
	for _, e := range flExpose.GetAll() {
		if strings.Contains(e, ":") {
			return nil, nil, cmd, fmt.Errorf("Invalid port format for --expose: %s", e)
		}
		//support two formats for expose, original format <portnum>/[<proto>] or <startport-endport>/[<proto>]

//.........这里部分代码省略.........
		}
	}

	var parsedSwappiness int64
	var flSwappiness int64

	if *flSwappinessStr != "" {
		parsedSwappiness, err = strconv.ParseInt(*flSwappinessStr, 10, 64)
		if err != nil || parsedSwappiness < 0 || parsedSwappiness > 100 {
			return nil, nil, cmd, fmt.Errorf("invalid value:%s. valid memory swappiness range is 0-100", *flSwappinessStr)
		}
		flSwappiness = parsedSwappiness
	} else {
		flSwappiness = -1
	}

	var binds []string
	// add any bind targets to the list of container volumes
	for bind := range flVolumes.GetMap() {
		if arr := strings.Split(bind, ":"); len(arr) > 1 {
			if arr[1] == "/" {
				return nil, nil, cmd, fmt.Errorf("Invalid bind mount: destination can't be '/'")
			}
			// after creating the bind mount we want to delete it from the flVolumes values because
			// we do not want bind mounts being committed to image configs
			binds = append(binds, bind)
			flVolumes.Delete(bind)
		} else if bind == "/" {
			return nil, nil, cmd, fmt.Errorf("Invalid volume: path can't be '/'")
		}
	}

	var (
		parsedArgs = cmd.Args()
		runCmd     *Command
		entrypoint *Entrypoint
		image      = cmd.Arg(0)
	)
	if len(parsedArgs) > 1 {
		runCmd = NewCommand(parsedArgs[1:]...)
	}
	if *flEntrypoint != "" {
		entrypoint = NewEntrypoint(*flEntrypoint)
	}

	lc, err := parseKeyValueOpts(flLxcOpts)
	if err != nil {
		return nil, nil, cmd, err
	}
	lxcConf := NewLxcConfig(lc)

	var (
		domainname string
		hostname   = *flHostname
		parts      = strings.SplitN(hostname, ".", 2)
	)
	if len(parts) > 1 {
		hostname = parts[0]
		domainname = parts[1]
	}

	ports, portBindings, err := nat.ParsePortSpecs(flPublish.GetAll())
	if err != nil {
		return nil, nil, cmd, err
	}

//.........这里部分代码省略.........
		flMemory = parsedMemory
	}

	var MemorySwap int64
	if *flMemorySwap != "" {
		if *flMemorySwap == "-1" {
			MemorySwap = -1
		} else {
			parsedMemorySwap, err := units.RAMInBytes(*flMemorySwap)
			if err != nil {
				return nil, nil, cmd, err
			}
			MemorySwap = parsedMemorySwap
		}
	}

	var binds []string
	// add any bind targets to the list of container volumes
	for bind := range flVolumes.GetMap() {
		if arr := strings.Split(bind, ":"); len(arr) > 1 {
			if arr[1] == "/" {
				return nil, nil, cmd, fmt.Errorf("Invalid bind mount: destination can't be '/'")
			}
			// after creating the bind mount we want to delete it from the flVolumes values because
			// we do not want bind mounts being committed to image configs
			binds = append(binds, bind)
			flVolumes.Delete(bind)
		} else if bind == "/" {
			return nil, nil, cmd, fmt.Errorf("Invalid volume: path can't be '/'")
		}
	}

	var (
		parsedArgs = cmd.Args()
		runCmd     []string
		entrypoint []string
		image      = cmd.Arg(0)
	)
	if len(parsedArgs) > 1 {
		runCmd = parsedArgs[1:]
	}
	if *flEntrypoint != "" {
		entrypoint = []string{*flEntrypoint}
	}

	lxcConf, err := parseKeyValueOpts(flLxcOpts)
	if err != nil {
		return nil, nil, cmd, err
	}

	var (
		domainname string
		hostname   = *flHostname
		parts      = strings.SplitN(hostname, ".", 2)
	)
	if len(parts) > 1 {
		hostname = parts[0]
		domainname = parts[1]
	}

	ports, portBindings, err := nat.ParsePortSpecs(flPublish.GetAll())
	if err != nil {
		return nil, nil, cmd, err
	}

	// Merge in exposed ports to the map of published ports

//.........这里部分代码省略.........
		attachStdout = true
		attachStderr = true
		if *flStdin {
			attachStdin = true
		}
	}

	var flMemory int64
	if *flMemoryString != "" {
		parsedMemory, err := units.RAMInBytes(*flMemoryString)
		if err != nil {
			return nil, nil, cmd, err
		}
		flMemory = parsedMemory
	}

	var binds []string
	// add any bind targets to the list of container volumes
	for bind := range flVolumes.GetMap() {
		if arr := strings.Split(bind, ":"); len(arr) > 1 {
			if arr[1] == "/" {
				return nil, nil, cmd, fmt.Errorf("Invalid bind mount: destination can't be '/'")
			}
			// after creating the bind mount we want to delete it from the flVolumes values because
			// we do not want bind mounts being committed to image configs
			binds = append(binds, bind)
			flVolumes.Delete(bind)
		} else if bind == "/" {
			return nil, nil, cmd, fmt.Errorf("Invalid volume: path can't be '/'")
		}
	}

	var (
		parsedArgs = cmd.Args()
		runCmd     []string
		entrypoint []string
		image      string
	)
	if len(parsedArgs) >= 1 {
		image = cmd.Arg(0)
	}
	if len(parsedArgs) > 1 {
		runCmd = parsedArgs[1:]
	}
	if *flEntrypoint != "" {
		entrypoint = []string{*flEntrypoint}
	}

	lxcConf, err := parseKeyValueOpts(flLxcOpts)
	if err != nil {
		return nil, nil, cmd, err
	}

	var (
		domainname string
		hostname   = *flHostname
		parts      = strings.SplitN(hostname, ".", 2)
	)
	if len(parts) > 1 {
		hostname = parts[0]
		domainname = parts[1]
	}

	ports, portBindings, err := nat.ParsePortSpecs(flPublish.GetAll())
	if err != nil {
		return nil, nil, cmd, err

//.........这里部分代码省略.........
	var shmSize int64
	if *flShmSize != "" {
		shmSize, err = units.RAMInBytes(*flShmSize)
		if err != nil {
			return nil, nil, nil, cmd, err
		}
	}

	var binds []string
	// add any bind targets to the list of container volumes
	for bind := range flVolumes.GetMap() {
		if arr := volumeSplitN(bind, 2); len(arr) > 1 {
			// after creating the bind mount we want to delete it from the flVolumes values because
			// we do not want bind mounts being committed to image configs
			binds = append(binds, bind)
			flVolumes.Delete(bind)
		}
	}

	// Can't evaluate options passed into --tmpfs until we actually mount
	tmpfs := make(map[string]string)
	for _, t := range flTmpfs.GetAll() {
		if arr := strings.SplitN(t, ":", 2); len(arr) > 1 {
			if _, _, err := mount.ParseTmpfsOptions(arr[1]); err != nil {
				return nil, nil, nil, cmd, err
			}
			tmpfs[arr[0]] = arr[1]
		} else {
			tmpfs[arr[0]] = ""
		}
	}

	var (
		parsedArgs = cmd.Args()
		runCmd     strslice.StrSlice
		entrypoint strslice.StrSlice
		image      = cmd.Arg(0)
	)
	if len(parsedArgs) > 1 {
		runCmd = strslice.StrSlice(parsedArgs[1:])
	}
	if *flEntrypoint != "" {
		entrypoint = strslice.StrSlice{*flEntrypoint}
	}
	// Validate if the given hostname is RFC 1123 (https://tools.ietf.org/html/rfc1123) compliant.
	hostname := *flHostname
	if hostname != "" {
		// Linux hostname is limited to HOST_NAME_MAX=64, not not including the terminating null byte.
		matched, _ := regexp.MatchString("^(([[:alnum:]]|[[:alnum:]][[:alnum:]\\-]*[[:alnum:]])\\.)*([[:alnum:]]|[[:alnum:]][[:alnum:]\\-]*[[:alnum:]])$", hostname)
		if len(hostname) > 64 || !matched {
			return nil, nil, nil, cmd, fmt.Errorf("invalid hostname format for --hostname: %s", hostname)
		}
	}

	ports, portBindings, err := nat.ParsePortSpecs(flPublish.GetAll())
	if err != nil {
		return nil, nil, nil, cmd, err
	}

	// Merge in exposed ports to the map of published ports
	for _, e := range flExpose.GetAll() {
		if strings.Contains(e, ":") {
			return nil, nil, nil, cmd, fmt.Errorf("invalid port format for --expose: %s", e)
		}
		//support two formats for expose, original format <portnum>/[<proto>] or <startport-endport>/[<proto>]
		proto, port := nat.SplitProtoPort(e)