func (d *Downloader) downloadImage(artifact *ct.Artifact, info chan *ct.ImagePullInfo) error {
info <- &ct.ImagePullInfo{
Name: artifact.Meta["flynn.component"],
Type: ct.ImagePullTypeImage,
Artifact: artifact,
}
for _, rootfs := range artifact.Manifest().Rootfs {
for _, layer := range rootfs.Layers {
if layer.Type != ct.ImageLayerTypeSquashfs {
continue
}
info <- &ct.ImagePullInfo{
Name: artifact.Meta["flynn.component"],
Type: ct.ImagePullTypeLayer,
Layer: layer,
}
if err := d.downloadSquashfsLayer(layer, artifact.LayerURL(layer), artifact.Meta); err != nil {
return fmt.Errorf("error downloading layer: %s", err)
}
}
}
return nil
}
