func (cli *DogestryCli) preparePullImage(fromId remote.ID, imageRoot string, r remote.Remote) error {
toDownload := make([]remote.ID, 0)
// TODO flatten this list, then iterate and pull each required file
// TODO parallelize
err := r.WalkImages(fromId, func(id remote.ID, image docker.Image, err error) error {
fmt.Printf("examining id '%s' on remote\n", id.Short())
if err != nil {
fmt.Println("err", err)
return err
}
_, err = cli.client.InspectImage(string(id))
if err == docker.ErrNoSuchImage {
toDownload = append(toDownload, id)
return nil
} else {
fmt.Printf("docker already has id '%s', stopping\n", id.Short())
return remote.BreakWalk
}
})
if err != nil {
return err
}
for _, id := range toDownload {
if err := cli.pullImage(id, filepath.Join(imageRoot, string(id)), r); err != nil {
return err
}
}
return nil
}
