func callGitAskPassURL()

in cmd/git-sync/main.go [1115:1167]
49 lines of code
11 McCabe index (conditional complexity)

func callGitAskPassURL(ctx context.Context, url string) error {
	log.V(1).Info("calling GIT_ASKPASS URL to get credentials")

	var netClient = &http.Client{
		Timeout: time.Second * 1,
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			return http.ErrUseLastResponse
		},
	}
	httpReq, err := http.NewRequestWithContext(ctx, "GET", url, nil)
	if err != nil {
		return fmt.Errorf("can't create auth request: %w", err)
	}
	resp, err := netClient.Do(httpReq)
	if err != nil {
		return fmt.Errorf("can't access auth URL: %w", err)
	}
	defer func() {
		_ = resp.Body.Close()
	}()
	if resp.StatusCode != 200 {
		errMessage, err := ioutil.ReadAll(resp.Body)
		if err != nil {
			return fmt.Errorf("auth URL returned status %d, failed to read body: %w", resp.StatusCode, err)
		}
		return fmt.Errorf("auth URL returned status %d, body: %q", resp.StatusCode, string(errMessage))
	}
	authData, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return fmt.Errorf("can't read auth response: %w", err)
	}

	username := ""
	password := ""
	for _, line := range strings.Split(string(authData), "\n") {
		keyValues := strings.SplitN(line, "=", 2)
		if len(keyValues) != 2 {
			continue
		}
		switch keyValues[0] {
		case "username":
			username = keyValues[1]
		case "password":
			password = keyValues[1]
		}
	}

	if err := setupGitAuth(ctx, username, password, *flRepo); err != nil {
		return err
	}

	return nil
}