func readVulnDB()

in internal/worker/worker.go [129:167]

• 36 lines of code
• 6 McCabe index (conditional complexity)

func readVulnDB(ctx context.Context) ([]string, error) {
	const concurrency = 4

	client, err := vulnc.NewClient([]string{vulnDBURL}, vulnc.Options{})
	if err != nil {
		return nil, err
	}

	goIDs, err := client.ListIDs(ctx)
	if err != nil {
		return nil, err
	}
	var (
		mu     sync.Mutex
		cveIDs []string
	)
	sem := make(chan struct{}, concurrency)
	g, ctx := errgroup.WithContext(ctx)
	for _, id := range goIDs {
		id := id
		sem <- struct{}{}
		g.Go(func() error {
			defer func() { <-sem }()
			e, err := client.GetByID(ctx, id)
			if err != nil {
				return err
			}
			// Assume all the aliases are CVE IDs.
			mu.Lock()
			cveIDs = append(cveIDs, e.Aliases...)
			mu.Unlock()
			return nil
		})
	}
	if err := g.Wait(); err != nil {
		return nil, err
	}
	return cveIDs, nil
}