func DoSync()

in internal/sync.go [662:723]
49 lines of code
10 McCabe index (conditional complexity)

func DoSync(ctx context.Context, cfg *config.Config) error {
	log.Info("Syncing AWS users and groups from Google Workspace SAML Application")

	creds := []byte(cfg.GoogleCredentials)

	if !cfg.IsLambda {
		b, err := ioutil.ReadFile(cfg.GoogleCredentials)
		if err != nil {
			return err
		}
		creds = b
	}

	// create a http client with retry and backoff capabilities
	retryClient := retryablehttp.NewClient()

	// https://github.com/hashicorp/go-retryablehttp/issues/6
	if cfg.Debug {
		retryClient.Logger = log.StandardLogger()
	} else {
		retryClient.Logger = nil
	}

	httpClient := retryClient.StandardClient()

	googleClient, err := google.NewClient(ctx, cfg.GoogleAdmin, creds)
	if err != nil {
		return err
	}

	awsClient, err := aws.NewClient(
		httpClient,
		&aws.Config{
			Endpoint: cfg.SCIMEndpoint,
			Token:    cfg.SCIMAccessToken,
		})
	if err != nil {
		return err
	}

	c := New(cfg, awsClient, googleClient)

	log.WithField("sync_method", cfg.SyncMethod).Info("syncing")
	if cfg.SyncMethod == config.DefaultSyncMethod {
		err = c.SyncGroupsUsers(cfg.GroupMatch)
		if err != nil {
			return err
		}
	} else {
		err = c.SyncUsers(cfg.UserMatch)
		if err != nil {
			return err
		}

		err = c.SyncGroups(cfg.GroupMatch)
		if err != nil {
			return err
		}
	}

	return nil
}