Files
narratio/internal/artifacts/run_id.go

31 lines
728 B
Go

package artifacts
import (
"crypto/rand"
"encoding/hex"
"fmt"
"io"
"time"
)
// NewRunID returns a run ID in format: YYYYMMDDTHHMMSSZ-xxxxxxxx.
func NewRunID() (string, error) {
return NewRunIDWith(time.Now().UTC(), rand.Reader)
}
// NewRunIDWith returns a run ID in format: YYYYMMDDTHHMMSSZ-xxxxxxxx
// using an injected timestamp and randomness source.
func NewRunIDWith(now time.Time, random io.Reader) (string, error) {
if random == nil {
random = rand.Reader
}
var suffix [4]byte
if _, err := io.ReadFull(random, suffix[:]); err != nil {
return "", fmt.Errorf("generate run id random suffix: %w", err)
}
ts := now.UTC().Format("20060102T150405Z")
return ts + "-" + hex.EncodeToString(suffix[:]), nil
}