forked from ebhomengo/niki
85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
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package opts
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import (
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"fmt"
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"strconv"
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"strings"
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"github.com/docker/docker/api/types/blkiodev"
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)
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// ValidatorWeightFctType defines a validator function that returns a validated struct and/or an error.
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type ValidatorWeightFctType func(val string) (*blkiodev.WeightDevice, error)
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// ValidateWeightDevice validates that the specified string has a valid device-weight format.
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func ValidateWeightDevice(val string) (*blkiodev.WeightDevice, error) {
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k, v, ok := strings.Cut(val, ":")
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if !ok || k == "" {
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return nil, fmt.Errorf("bad format: %s", val)
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}
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// TODO(thaJeztah): should we really validate this on the client?
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if !strings.HasPrefix(k, "/dev/") {
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return nil, fmt.Errorf("bad format for device path: %s", val)
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}
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weight, err := strconv.ParseUint(v, 10, 16)
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if err != nil {
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return nil, fmt.Errorf("invalid weight for device: %s", val)
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}
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if weight > 0 && (weight < 10 || weight > 1000) {
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return nil, fmt.Errorf("invalid weight for device: %s", val)
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}
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return &blkiodev.WeightDevice{
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Path: k,
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Weight: uint16(weight),
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}, nil
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}
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// WeightdeviceOpt defines a map of WeightDevices
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type WeightdeviceOpt struct {
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values []*blkiodev.WeightDevice
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validator ValidatorWeightFctType
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}
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// NewWeightdeviceOpt creates a new WeightdeviceOpt
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func NewWeightdeviceOpt(validator ValidatorWeightFctType) WeightdeviceOpt {
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return WeightdeviceOpt{
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values: []*blkiodev.WeightDevice{},
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validator: validator,
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}
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}
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// Set validates a WeightDevice and sets its name as a key in WeightdeviceOpt
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func (opt *WeightdeviceOpt) Set(val string) error {
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var value *blkiodev.WeightDevice
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if opt.validator != nil {
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v, err := opt.validator(val)
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if err != nil {
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return err
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}
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value = v
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}
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opt.values = append(opt.values, value)
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return nil
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}
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// String returns WeightdeviceOpt values as a string.
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func (opt *WeightdeviceOpt) String() string {
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out := make([]string, 0, len(opt.values))
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for _, v := range opt.values {
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out = append(out, v.String())
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}
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return fmt.Sprintf("%v", out)
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}
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// GetList returns a slice of pointers to WeightDevices.
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func (opt *WeightdeviceOpt) GetList() []*blkiodev.WeightDevice {
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return opt.values
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}
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// Type returns the option type
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func (opt *WeightdeviceOpt) Type() string {
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return "list"
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}
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