kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
	kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
	"k8s.io/kubernetes/cmd/kubeadm/app/util/pkiutil"
)

const (
	errInvalid = "invalid argument"
	errExist   = "file already exists"
)

type configMutatorsFunc func(*kubeadmapi.InitConfiguration, *pkiutil.CertConfig) error

// KubeadmCert represents a certificate that Kubeadm will create to function properly.

	if _, err := os.Stat(kubeConfigPath); err == nil {
		return errors.Errorf("%s: kube config: %s", errExist, kubeConfigPath)
	} else if !os.IsNotExist(err) {
		return errors.Wrapf(err, "unexpected error while checking if file exists: %s", kubeConfigPath)
	}
	if pkiutil.CSROrKeyExist(kubeConfigDir, name) {
		return errors.Errorf("%s: csr: %s", errExist, kubeConfigPath)
	}

	clientCertConfig := newClientCertConfigFromKubeConfigSpec(spec)

		// mark respective subtrees manually
		markTree(tree.entries[1])
		markTree(tree.entries[3])
		// correct double-marking of directory itself
		tree.entries[1].mark -= errVisit
		tree.entries[3].mark -= errVisit
		err := walk(tree.name, markFn)
		if err != nil {
			t.Fatalf("expected no error return from Walk, got %s", err)
		}
		if len(errors) != 2 {

			return s
		}
	}
	return "errno " + itoa.Itoa(int(e))
}

func (e Errno) Is(target error) bool {
	switch target {
	case oserror.ErrPermission:
		return e == EACCES || e == EPERM
	case oserror.ErrExist:
		return e == EEXIST || e == ENOTEMPTY
	case oserror.ErrNotExist:
		return e == ENOENT
	case errorspkg.ErrUnsupported:
		return e == ENOSYS || e == ENOTSUP || e == EOPNOTSUPP
	}
	return false
}