func pullImage()

in gce-containers-startup/runtime/runtime.go [134:166]

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

func pullImage(dockerClient DockerApiClient, auth string, spec api.Container) error {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	authStruct := dockertypes.AuthConfig{}
	if auth != "" {
		authStruct.Username = "_token"
		authStruct.Password = auth
	}

	base64Auth, err := base64EncodeAuth(authStruct)
	if err != nil {
		return err
	}

	opts := dockertypes.ImagePullOptions{}
	opts.RegistryAuth = base64Auth

	log.Printf("Pulling image: '%s'", spec.Image)
	resp, err := dockerClient.ImagePull(ctx, spec.Image, opts)
	if err != nil {
		return err
	}
	defer resp.Close()

	body, err := ioutil.ReadAll(resp)
	if err != nil {
		return err
	}
	log.Printf("Received ImagePull response: (%s).\n", body)

	return nil
}