cmd/root.go
func dirURL(path string) *url.URL {
	path = filepath.ToSlash(path)
	if path[len(path)-1] != '/' {
		// trailing slash is important
		path = path + "/"
	}
	return &url.URL{Scheme: "file", Path: path}
}
func dirURL(path string) *url.URL {
	path = filepath.ToSlash(path)
	if path[len(path)-1] != '/' {
		// trailing slash is important
		path = path + "/"
	}
	return &url.URL{Scheme: "file", Path: path}
}
// NB: `path` is assumed to be in native-OS path separator form