kubernetes/staging/src/k8s.io/client-go/util/testing/tmpdir.go

// MkTmpdir creates a temporary directory based upon the prefix passed in.
// If successful, it returns the temporary directory path. The directory can be
// deleted with a call to "os.RemoveAll(...)".
// In case of error, it'll return an empty string and the error.
func MkTmpdir(prefix string) (string, error) { … }

// MkTmpdirOrDie does the same work as "MkTmpdir", except in case of
// errors, it'll trigger a panic.
func MkTmpdirOrDie(prefix string) string { … }