// AMIStateRefreshFunc returns a StateRefreshFunc that is used to watch
// an AMI for state changes.
func AMIStateRefreshFunc(conn ec2.EC2, imageId string) StateRefreshFunc {
return func() (interface{}, string, error) {
resp, err := conn.Images([]string{imageId}, ec2.NewFilter())
if err != nil {
if ec2err, ok := err.(*ec2.Error); ok && ec2err.Code == "InvalidAMIID.NotFound" {
// Set this to nil as if we didn't find anything.
resp = nil
} else {
log.Printf("Error on AMIStateRefresh: %s", err)
return nil, "", err
}
}
if resp == nil || len(resp.Images) == 0 {
// Sometimes AWS has consistency issues and doesn't see the
// AMI. Return an empty state.
return nil, "", nil
}
i := resp.Images[0]
return i, i.State, nil
}
}
