retry.go

package siatest

import (
	"time"
)

// Retry will call 'fn' 'tries' times, waiting 'durationBetweenAttempts'
// between each attempt, returning 'nil' the first time that 'fn' returns nil.
// If 'nil' is never returned, then the final error returned by 'fn' is
// returned.
func Retry(tries int, durationBetweenAttempts time.Duration, fn func() error) (err error) {
	for i := 1; i < tries; i++ {
		err = fn()
		if err == nil {
			return nil
		}
		time.Sleep(durationBetweenAttempts)
	}
	return fn()
}