47 lines
989 B
Go
47 lines
989 B
Go
package validate
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import (
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"fmt"
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"strings"
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)
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// Honors cobra.Value interface
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type ChoiceValue struct {
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value *string
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choices []string
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}
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// Value may be used in cobra FlagSet methods Var/VarP/VarPF() to select from a set of values
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//
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// Example:
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// created := validate.ChoiceValue(&opts.Sort, "command", "created", "id", "image", "names", "runningfor", "size", "status")
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// flags.Var(created, "sort", "Sort output by: "+created.Choices())
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func Value(p *string, choices ...string) *ChoiceValue {
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return &ChoiceValue{
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value: p,
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choices: choices,
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}
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}
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func (c *ChoiceValue) String() string {
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return *c.value
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}
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func (c *ChoiceValue) Set(value string) error {
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for _, v := range c.choices {
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if v == value {
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*c.value = value
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return nil
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}
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}
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return fmt.Errorf("%q is not a valid value. Choose from: %q", value, c.Choices())
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}
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func (c *ChoiceValue) Choices() string {
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return strings.Join(c.choices, ", ")
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}
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func (c *ChoiceValue) Type() string {
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return "choice"
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}
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