func InitMetrics()

in pkg/observability/opentelemetry.go [63:87]

• 20 lines of code
• 5 McCabe index (conditional complexity)

func InitMetrics(enabled bool, port int) (Metrics, error) {
	exporter, err := prometheus.New()
	if err != nil {
		return Metrics{}, fmt.Errorf("failed to create Prometheus exporter: %w", err)
	}
	provider := metric.NewMeterProvider(metric.WithReader(exporter))
	metrics, err := registerMetricsWith(provider)
	if err != nil {
		return Metrics{}, fmt.Errorf("failed to register metrics with Prometheus provider: %w", err)
	}
	metrics.enabled = enabled

	// Starts an async process to collect golang runtime stats
	// go.opentelemetry.io/contrib/instrumentation/runtime
	err = runtime.Start(runtime.WithMeterProvider(provider), runtime.WithMinimumReadMemStatsInterval(1*time.Second))
	if err != nil {
		return Metrics{}, fmt.Errorf("failed to start Go runtime metrics collection: %w", err)
	}

	if enabled {
		serveMetrics(port)
	}

	return metrics, nil
}