function func mkdirForFile(filePath string) error {
	dir := filepath.Dir(filePath)
	return os.MkdirAll(dir, 0755)
}

func CopyFile(dst string, src string) error {
	err := mkdirForFile(dst)
	if err != nil {
		return err
	}
	fin, err := os.Open(src)
	if err != nil {
		return err
	}
	defer fin.Close()
	fout, err := os.Create(dst)
	if err != nil {
		return err
	}

	_, err = io.Copy(fout, fin)
	err2 := fout.Close()
	if err != nil || err2 != nil {
		os.Remove(dst)
	}

	return err
}