func initProvider()

in sampleapp/main.go [118:153]
27 lines of code
3 McCabe index (conditional complexity)

func initProvider() {
	ctx := context.Background()

	endpoint := os.Getenv("OTEL_EXPORTER_OTLP_ENDPOINT")
	if endpoint == "" {
		endpoint = "0.0.0.0:4317" // setting default endpoint for exporter
	}

	// Create and start new OTLP trace exporter
	traceExporter, err := otlptracegrpc.New(ctx, otlptracegrpc.WithInsecure(), otlptracegrpc.WithEndpoint(endpoint), otlptracegrpc.WithDialOption(grpc.WithBlock()))
	handleErr(err, "failed to create new OTLP trace exporter")

	idg := xray.NewIDGenerator()

	service := os.Getenv("GO_GORILLA_SERVICE_NAME")
	if service == "" {
		service = "go-gorilla"
	}

	res := resource.NewWithAttributes(
		semconv.SchemaURL,
		// the service name used to display traces in backends
		semconv.ServiceNameKey.String("test-service"),
	)
	handleErr(err, "failed to create resource")

	tp := sdktrace.NewTracerProvider(
		sdktrace.WithSampler(sdktrace.AlwaysSample()),
		sdktrace.WithResource(res),
		sdktrace.WithBatcher(traceExporter),
		sdktrace.WithIDGenerator(idg),
	)

	otel.SetTracerProvider(tp)
	otel.SetTextMapPropagator(xray.Propagator{})
}