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package opts
import (
"time"
"github.com/pkg/errors"
)
// PositiveDurationOpt is an option type for time.Duration that uses a pointer.
// It behave similarly to DurationOpt but only allows positive duration values.
type PositiveDurationOpt struct {
DurationOpt
}
// Set a new value on the option. Setting a negative duration value will cause
// an error to be returned.
func (d *PositiveDurationOpt) Set(s string) error {
err := d.DurationOpt.Set(s)
if err != nil {
return err
}
if *d.DurationOpt.value < 0 {
return errors.Errorf("duration cannot be negative")
}
return nil
}
// DurationOpt is an option type for time.Duration that uses a pointer. This
// allows us to get nil values outside, instead of defaulting to 0
type DurationOpt struct {
value *time.Duration
}
// NewDurationOpt creates a DurationOpt with the specified duration
func NewDurationOpt(value *time.Duration) *DurationOpt {
return &DurationOpt{
value: value,
}
}
// Set a new value on the option
func (d *DurationOpt) Set(s string) error {
v, err := time.ParseDuration(s)
d.value = &v
return err
}
// Type returns the type of this option, which will be displayed in `--help` output
func (d *DurationOpt) Type() string {
return "duration"
}
// String returns a string repr of this option
func (d *DurationOpt) String() string {
if d.value != nil {
return d.value.String()
}
return ""
}
// Value returns the time.Duration
func (d *DurationOpt) Value() *time.Duration {
return d.value
}
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