30 lines
496 B
Go
30 lines
496 B
Go
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package acme
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import (
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"fmt"
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"time"
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)
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// WaitFor polls the given function 'f', once every 'interval', up to 'timeout'.
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func WaitFor(timeout, interval time.Duration, f func() (bool, error)) error {
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var lastErr string
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timeup := time.After(timeout)
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for {
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select {
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case <-timeup:
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return fmt.Errorf("Time limit exceeded. Last error: %s", lastErr)
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default:
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}
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stop, err := f()
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if stop {
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return nil
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}
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if err != nil {
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lastErr = err.Error()
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}
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time.Sleep(interval)
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}
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}
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