filer

type File struct {
	Name  string
	IsDir bool
}

type Filer interface {
	// ReadFile returns the contents of a file given it's path.
	ReadFile(path string) (content []byte, err error)
	// ReadDir lists a directory.
	ReadDir(path string) ([]File, error)
	// Close frees all the resources allocated by this Filer.
	Close()
	// PathsAreAlwaysSlash indicates whether the path separator is platform-independent ("/") or
	// OS-specific.
	PathsAreAlwaysSlash() bool
}