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timeduration.go
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timeduration.go
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// Copyright (c) The Thanos Authors.
// Licensed under the Apache License 2.0.
package model
import (
"time"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/model/timestamp"
"gopkg.in/alecthomas/kingpin.v2"
)
// TimeOrDurationValue is a custom kingping parser for time in RFC3339
// or duration in Go's duration format, such as "300ms", "-1.5h" or "2h45m".
// Only one will be set.
type TimeOrDurationValue struct {
Time *time.Time
Dur *model.Duration
}
// Set converts string to TimeOrDurationValue.
func (tdv *TimeOrDurationValue) Set(s string) error {
t, err := time.Parse(time.RFC3339, s)
if err == nil {
tdv.Time = &t
return nil
}
// error parsing time, let's try duration.
var minus bool
if s[0] == '-' {
minus = true
s = s[1:]
}
dur, err := model.ParseDuration(s)
if err != nil {
return err
}
if minus {
dur = dur * -1
}
tdv.Dur = &dur
return nil
}
// String returns either time or duration.
func (tdv *TimeOrDurationValue) String() string {
switch {
case tdv.Time != nil:
return tdv.Time.String()
case tdv.Dur != nil:
if v := *tdv.Dur; v < 0 {
return "-" + (-v).String()
}
return tdv.Dur.String()
}
return "nil"
}
// PrometheusTimestamp returns TimeOrDurationValue converted to PrometheusTimestamp
// if duration is set now+duration is converted to Timestamp.
func (tdv *TimeOrDurationValue) PrometheusTimestamp() int64 {
switch {
case tdv.Time != nil:
return timestamp.FromTime(*tdv.Time)
case tdv.Dur != nil:
return timestamp.FromTime(time.Now().Add(time.Duration(*tdv.Dur)))
}
return 0
}
// TimeOrDuration helper for parsing TimeOrDuration with kingpin.
func TimeOrDuration(flags *kingpin.FlagClause) *TimeOrDurationValue {
value := new(TimeOrDurationValue)
flags.SetValue(value)
return value
}