mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
package flagutil
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/VictoriaMetrics/metricsql"
|
|
)
|
|
|
|
// NewDuration returns new `duration` flag with the given name, defaultValue and description.
|
|
//
|
|
// DefaultValue is in months.
|
|
func NewDuration(name string, defaultValue string, description string) *Duration {
|
|
description += "\nThe following optional suffixes are supported: s (second), m (minute), h (hour), d (day), w (week), y (year). "+
|
|
"If suffix isn't set, then the duration is counted in months"
|
|
d := &Duration{}
|
|
if err := d.Set(defaultValue); err != nil {
|
|
panic(fmt.Sprintf("BUG: can not parse default value %s for flag %s", defaultValue, name))
|
|
}
|
|
flag.Var(d, name, description)
|
|
return d
|
|
}
|
|
|
|
// Duration is a flag for holding duration.
|
|
type Duration struct {
|
|
// msecs contains parsed duration in milliseconds.
|
|
msecs int64
|
|
|
|
valueString string
|
|
}
|
|
|
|
// Duration returns d as time.Duration
|
|
func (d *Duration) Duration() time.Duration {
|
|
return time.Millisecond * time.Duration(d.msecs)
|
|
}
|
|
|
|
// Milliseconds returns d in milliseconds
|
|
func (d *Duration) Milliseconds() int64 {
|
|
return d.msecs
|
|
}
|
|
|
|
// String implements flag.Value interface
|
|
func (d *Duration) String() string {
|
|
return d.valueString
|
|
}
|
|
|
|
// Set implements flag.Value interface
|
|
func (d *Duration) Set(value string) error {
|
|
// An attempt to parse value in months.
|
|
months, err := strconv.ParseFloat(value, 64)
|
|
if err == nil {
|
|
if months > maxMonths {
|
|
return fmt.Errorf("duration months must be smaller than %d; got %g", maxMonths, months)
|
|
}
|
|
if months < 0 {
|
|
return fmt.Errorf("duration months cannot be negative; got %g", months)
|
|
}
|
|
d.msecs = int64(months * msecsPer31Days)
|
|
d.valueString = value
|
|
return nil
|
|
}
|
|
// Parse duration.
|
|
value = strings.ToLower(value)
|
|
if strings.HasSuffix(value, "m") {
|
|
return fmt.Errorf("duration in months must be set without `m` suffix due to ambiguity with duration in minutes; got %s", value)
|
|
}
|
|
msecs, err := metricsql.PositiveDurationValue(value, 0)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
d.msecs = msecs
|
|
d.valueString = value
|
|
return nil
|
|
}
|
|
|
|
const maxMonths = 12 * 100
|
|
|
|
const msecsPer31Days = 31 * 24 * 3600 * 1000
|