scanner

type Scanner interface {
	LoadPluginListFromFS(indexDir string) ([]index.Plugin, error)
	LoadPluginByName(pluginsDir, pluginName string) (index.Plugin, error)
	ReadPluginFromFile(path string) (index.Plugin, error)
	ReadPlugin(f io.ReadCloser) (index.Plugin, error)
	ReadReceiptFromFile(path string) (index.Receipt, error)
	DecodePluginFile(r io.Reader) (index.Plugin, error)
}