func WithDuration(n string, fn func(time.Duration)) func(e *EnvOptionsReader)
WithDuration retrieves the specified config and passes it to ConfigFn as a duration.
func WithHeaders(n string, fn func(map[string]string)) func(e *EnvOptionsReader)
WithHeaders retrieves the specified config and passes it to ConfigFn as a map of HTTP headers.
func WithString(n string, fn func(string)) func(e *EnvOptionsReader)
WithString retrieves the specified config and passes it to ConfigFn as a string.
func WithURL(n string, fn func(*url.URL)) func(e *EnvOptionsReader)
WithURL retrieves the specified config and passes it to ConfigFn as a net/url.URL.
ConfigFn is the generic function used to set a config.
type ConfigFn func(*EnvOptionsReader)
func WithBool(n string, fn func(bool)) ConfigFn
WithBool returns a ConfigFn that reads the environment variable n and if it exists passes its parsed bool value to fn.
func WithCertPool(n string, fn func(*x509.CertPool)) ConfigFn
WithCertPool returns a ConfigFn that reads the environment variable n as a filepath to a TLS certificate pool. If it exists, it is parsed as a crypto/x509.CertPool and it is passed to fn.
func WithClientCert(nc, nk string, fn func(tls.Certificate)) ConfigFn
WithClientCert returns a ConfigFn that reads the environment variable nc and nk as filepaths to a client certificate and key pair. If they exists, they are parsed as a crypto/tls.Certificate and it is passed to fn.
EnvOptionsReader reads the required environment variables.
type EnvOptionsReader struct {
GetEnv func(string) string
ReadFile func(string) ([]byte, error)
Namespace string
}
func (e *EnvOptionsReader) Apply(opts ...ConfigFn)
Apply runs every ConfigFn.
func (e *EnvOptionsReader) GetEnvValue(key string) (string, bool)
GetEnvValue gets an OTLP environment variable value of the specified key using the GetEnv function. This function prepends the OTLP specified namespace to all key lookups.