fs

type FileInfo struct {
	FileName    string
	FileSize    int64
	FileMode    os.FileMode
	FileModTime time.Time
	FileIsDir   bool
	FileSys     interface{}
}

type FileSystem interface {
	Chmod(file string, mode os.FileMode) error
	Rename(from, to string) error
	MkdirAll(dirname string) error
	MkdirAllWithPermissions(dirname string, perm os.FileMode) error
	Mkdir(dirname string) error
	Exists(file string) bool
	Copy(sourcePath, targetPath string, isIgnored func(path string) bool) error
	CopyContents(sourcePath, targetPath string, isIgnored func(path string) bool) error
	RemoveDirectory(dir string) error
	CreateWorkingDirectory() (string, error)
	Open(file string) (io.ReadCloser, error)
	Create(file string) (io.WriteCloser, error)
	WriteFile(file string, data []byte) error
	ReadDir(string) ([]os.FileInfo, error)
	Stat(string) (os.FileInfo, error)
	Lstat(string) (os.FileInfo, error)
	Walk(string, filepath.WalkFunc) error
	Readlink(string) (string, error)
	Symlink(string, string) error
	KeepSymlinks(bool)
	ShouldKeepSymlinks() bool
}