// lookupImageOnEndpoint checks the specified endpoint to see if an image exists
// and if it is absent then it sends the image id to the channel to be pushed.
func lookupImageOnEndpoint(wg *sync.WaitGroup, r *registry.Session, out io.Writer, sf *utils.StreamFormatter,
images chan imagePushData, imagesToPush chan string) {
defer wg.Done()
for image := range images {
if err := r.LookupRemoteImage(image.id, image.endpoint, image.tokens); err != nil {
log.Errorf("Error in LookupRemoteImage: %s", err)
imagesToPush <- image.id
continue
}
out.Write(sf.FormatStatus("", "Image %s already pushed, skipping", stringid.TruncateID(image.id)))
}
}
