Golang Mount.ReadOnly方法代码示例

// ParseMountRaw parses a raw volume spec (e.g. `-v /foo:/bar:shared`) into a
// structured spec. Once the raw spec is parsed it relies on `ParseMountSpec` to
// validate the spec and create a MountPoint
func ParseMountRaw(raw, volumeDriver string) (*MountPoint, error) {
	arr, err := splitRawSpec(convertSlash(raw))
	if err != nil {
		return nil, err
	}

	var spec mounttypes.Mount
	var mode string
	switch len(arr) {
	case 1:
		// Just a destination path in the container
		spec.Target = arr[0]
	case 2:
		if ValidMountMode(arr[1]) {
			// Destination + Mode is not a valid volume - volumes
			// cannot include a mode. eg /foo:rw
			return nil, errInvalidSpec(raw)
		}
		// Host Source Path or Name + Destination
		spec.Source = arr[0]
		spec.Target = arr[1]
	case 3:
		// HostSourcePath+DestinationPath+Mode
		spec.Source = arr[0]
		spec.Target = arr[1]
		mode = arr[2]
	default:
		return nil, errInvalidSpec(raw)
	}

	if !ValidMountMode(mode) {
		return nil, errInvalidMode(mode)
	}

	if filepath.IsAbs(spec.Source) {
		spec.Type = mounttypes.TypeBind
	} else {
		spec.Type = mounttypes.TypeVolume
	}

	spec.ReadOnly = !ReadWrite(mode)

	// cannot assume that if a volume driver is passed in that we should set it
	if volumeDriver != "" && spec.Type == mounttypes.TypeVolume {
		spec.VolumeOptions = &mounttypes.VolumeOptions{
			DriverConfig: &mounttypes.Driver{Name: volumeDriver},
		}
	}

	if copyData, isSet := getCopyMode(mode); isSet {
		if spec.VolumeOptions == nil {
			spec.VolumeOptions = &mounttypes.VolumeOptions{}
		}
		spec.VolumeOptions.NoCopy = !copyData
	}
	if HasPropagation(mode) {
		spec.BindOptions = &mounttypes.BindOptions{
			Propagation: GetPropagation(mode),
		}
	}

	mp, err := ParseMountSpec(spec, platformRawValidationOpts...)
	if mp != nil {
		mp.Mode = mode
	}
	if err != nil {
		err = fmt.Errorf("%v: %v", errInvalidSpec(raw), err)
	}
	return mp, err
}

// Set a new mount value
func (m *MountOpt) Set(value string) error {
	csvReader := csv.NewReader(strings.NewReader(value))
	fields, err := csvReader.Read()
	if err != nil {
		return err
	}

	mount := mounttypes.Mount{}

	volumeOptions := func() *mounttypes.VolumeOptions {
		if mount.VolumeOptions == nil {
			mount.VolumeOptions = &mounttypes.VolumeOptions{
				Labels: make(map[string]string),
			}
		}
		if mount.VolumeOptions.DriverConfig == nil {
			mount.VolumeOptions.DriverConfig = &mounttypes.Driver{}
		}
		return mount.VolumeOptions
	}

	bindOptions := func() *mounttypes.BindOptions {
		if mount.BindOptions == nil {
			mount.BindOptions = new(mounttypes.BindOptions)
		}
		return mount.BindOptions
	}

	setValueOnMap := func(target map[string]string, value string) {
		parts := strings.SplitN(value, "=", 2)
		if len(parts) == 1 {
			target[value] = ""
		} else {
			target[parts[0]] = parts[1]
		}
	}

	mount.Type = mounttypes.TypeVolume // default to volume mounts
	// Set writable as the default
	for _, field := range fields {
		parts := strings.SplitN(field, "=", 2)
		key := strings.ToLower(parts[0])

		if len(parts) == 1 {
			switch key {
			case "readonly", "ro":
				mount.ReadOnly = true
				continue
			case "volume-nocopy":
				volumeOptions().NoCopy = true
				continue
			}
		}

		if len(parts) != 2 {
			return fmt.Errorf("invalid field '%s' must be a key=value pair", field)
		}

		value := parts[1]
		switch key {
		case "type":
			mount.Type = mounttypes.Type(strings.ToLower(value))
		case "source", "src":
			mount.Source = value
		case "target", "dst", "destination":
			mount.Target = value
		case "readonly", "ro":
			mount.ReadOnly, err = strconv.ParseBool(value)
			if err != nil {
				return fmt.Errorf("invalid value for %s: %s", key, value)
			}
		case "bind-propagation":
			bindOptions().Propagation = mounttypes.Propagation(strings.ToLower(value))
		case "volume-nocopy":
			volumeOptions().NoCopy, err = strconv.ParseBool(value)
			if err != nil {
				return fmt.Errorf("invalid value for populate: %s", value)
			}
		case "volume-label":
			setValueOnMap(volumeOptions().Labels, value)
		case "volume-driver":
			volumeOptions().DriverConfig.Name = value
		case "volume-opt":
			if volumeOptions().DriverConfig.Options == nil {
				volumeOptions().DriverConfig.Options = make(map[string]string)
			}
			setValueOnMap(volumeOptions().DriverConfig.Options, value)
		default:
			return fmt.Errorf("unexpected key '%s' in '%s'", key, field)
		}
	}

	if mount.Type == "" {
		return fmt.Errorf("type is required")
	}

	if mount.Target == "" {
		return fmt.Errorf("target is required")
	}
//.........这里部分代码省略.........