func renameTag(store *storage.Storage, tx *storage.Tx, currentName, newName string) error {
sourceTag, err := store.TagByName(tx, currentName)
if err != nil {
return fmt.Errorf("could not retrieve tag '%v': %v", currentName, err)
}
if sourceTag == nil {
return fmt.Errorf("no such tag '%v'", currentName)
}
destTag, err := store.TagByName(tx, newName)
if err != nil {
return fmt.Errorf("could not retrieve tag '%v': %v", newName, err)
}
if destTag != nil {
return fmt.Errorf("tag '%v' already exists", newName)
}
log.Infof(2, "renaming tag '%v' to '%v'.", currentName, newName)
_, err = store.RenameTag(tx, sourceTag.Id, newName)
if err != nil {
return fmt.Errorf("could not rename tag '%v' to '%v': %v", currentName, newName, err)
}
return nil
}
