func newKeyGenerator()

in dialer.go [86:104]

• 13 lines of code
• 3 McCabe index (conditional complexity)

func newKeyGenerator(
	k *rsa.PrivateKey, lazy bool, genFunc func() (*rsa.PrivateKey, error),
) (*keyGenerator, error) {
	g := &keyGenerator{genFunc: genFunc}
	switch {
	case k != nil:
		// If the caller has provided a key, initialize the key and consume the
		// sync.Once now.
		g.once.Do(func() { g.key, g.err = k, nil })
	case lazy:
		// If lazy refresh is enabled, do nothing and wait for the call to
		// rsaKey.
	default:
		// If no key has been provided and lazy refresh isn't enabled, generate
		// the key and consume the sync.Once now.
		g.once.Do(func() { g.key, g.err = g.genFunc() })
	}
	return g, g.err
}