func (i *Importer) download(buk *s3.Bucket, id string) error {
tmpPath := path.Join(env.DIR, "graph", ":artmp:"+id)
outPath := path.Join(env.DIR, "graph", id)
os.MkdirAll(tmpPath, 0755)
os.MkdirAll(path.Join(outPath, "layer"), 0755)
key := fmt.Sprintf("/binary/repos/%s.layer", id)
rc, err := buk.GetReader(key)
if err != nil {
return err
}
cmd := exec.Command("tar", "-f", "-", "-C", tmpPath, "-x")
cmd.Stdin = rc
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Run()
rc.Close()
img := i.extract(id, tmpPath)
if img.Parent != "" {
if i.alreadyExists(img.Parent) {
return fmt.Errorf("Parent layer %s already installed, not overwriting\n", img.Parent)
}
fmt.Printf("Moving to download parent %s...\n", img.Parent)
return i.download(buk, img.Parent)
}
return nil
}
