// renderInStore renders a ACI specified by `filename` in the given tree store,
// and returns the hash (image ID) of the rendered ACI.
func renderInStore(s *store.Store, filename string) (string, error) {
// Put the ACI into the store
f, err := os.Open(filename)
if err != nil {
return "", fmt.Errorf("Could not open ACI image: %s", err)
}
key, err := s.WriteACI(f, false)
if err != nil {
return "", fmt.Errorf("Could not open ACI: %s", key)
}
// Render the ACI
if err := s.RenderTreeStore(key, false); err != nil {
return "", fmt.Errorf("Could not render tree store: %s", err)
}
return key, err
}