Golang FlagSet.Arg方法代碼示例

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
	)
	cmd.Require(flag.Min, 2)
	if err := utils.ParseFlags(cmd, args, true); err != nil {
		return nil, err
	}
	container = cmd.Arg(0)
	parsedArgs := cmd.Args()
	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
}

// 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) (*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
		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,
		Privileged: *flPrivileged,
		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
}

//.........這裏部分代碼省略.........
		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

//.........這裏部分代碼省略.........
		}
	}

	var KernelMemory int64
	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 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     *stringutils.StrSlice
		entrypoint *stringutils.StrSlice
		image      = cmd.Arg(0)
	)
	if len(parsedArgs) > 1 {
		runCmd = stringutils.NewStrSlice(parsedArgs[1:]...)
	}
	if *flEntrypoint != "" {
		entrypoint = stringutils.NewStrSlice(*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
	}