Function newWithCache

config.go:239–295

newWithCache ensures that cfg is a valid config by populating zero-value fields from the Default Config. If certCache is nil, this function panics.

(certCache *Cache, cfg Config)

// zero-value fields from the Default Config. If certCache is
// nil, this function panics.
func newWithCache(certCache *Cache, cfg Config) *Config {
	if certCache == nil {
		panic("cannot make a valid config without a pointer to a certificate cache")
	}

	if cfg.OnDemand == nil {
		cfg.OnDemand = Default.OnDemand
	}
	if !cfg.MustStaple {
		cfg.MustStaple = Default.MustStaple
	}
	if cfg.Issuers == nil {
		cfg.Issuers = Default.Issuers
		if cfg.Issuers == nil {
			// at least one issuer is absolutely required if not nil
			cfg.Issuers = []Issuer{NewACMEIssuer(&cfg, DefaultACME)}
		}
	}
	if cfg.RenewalWindowRatio == 0 {
		cfg.RenewalWindowRatio = Default.RenewalWindowRatio
	}
	if cfg.OnEvent == nil {
		cfg.OnEvent = Default.OnEvent
	}
	if cfg.KeySource == nil {
		cfg.KeySource = Default.KeySource
	}
	if cfg.DefaultServerName == "" {
		cfg.DefaultServerName = Default.DefaultServerName
	}
	if cfg.FallbackServerName == "" {
		cfg.FallbackServerName = Default.FallbackServerName
	}
	if cfg.Storage == nil {
		cfg.Storage = Default.Storage
	}
	if cfg.Logger == nil {
		cfg.Logger = Default.Logger
	}

	// absolutely don't allow a nil storage,
	// because that would make almost anything
	// a config can do pointless
	if cfg.Storage == nil {
		cfg.Storage = defaultFileStorage
	}

	// absolutely don't allow a nil logger either,
	// because that would result in panics
	if cfg.Logger == nil {
		cfg.Logger = defaultLogger
	}

	cfg.certCache = certCache

	return &cfg
}