func (g *OvenCleaner) removeRecursively(log lager.Logger, cake layercake.Cake, id layercake.ID) error {
log = log.Session("remove-recursively", lager.Data{"id": id})
log.Debug("start")
defer log.Debug("finished")
if g.retainCheck.Check(id) {
log.Debug("layer-is-held")
return nil
}
img, err := cake.Get(id)
if err != nil {
log.Error("get-image-failed", err)
return nil
}
if img.Container != "" {
log.Debug("image-is-container", lager.Data{"id": id, "container": img.Container})
return nil
}
if err := cake.Remove(id); err != nil {
log.Error("remove-image-failed", err)
return err
}
if img.Parent == "" {
log.Debug("stop-image-has-no-parent")
return nil
}
if leaf, err := cake.IsLeaf(layercake.DockerImageID(img.Parent)); err == nil && leaf {
log.Debug("has-parent-leaf", lager.Data{"parent-id": img.Parent})
return g.removeRecursively(log, cake, layercake.DockerImageID(img.Parent))
}
return nil
}
