func runSave(dockerCli *client.DockerCli, opts saveOptions) error {
if opts.output == "" && dockerCli.Out().IsTerminal() {
return errors.New("Cowardly refusing to save to a terminal. Use the -o flag or redirect.")
}
responseBody, err := dockerCli.Client().ImageSave(context.Background(), opts.images)
if err != nil {
return err
}
defer responseBody.Close()
if opts.output == "" {
_, err := io.Copy(dockerCli.Out(), responseBody)
return err
}
return client.CopyToFile(opts.output, responseBody)
}
func runExport(dockerCli *client.DockerCli, opts exportOptions) error {
if opts.output == "" && dockerCli.IsTerminalOut() {
return errors.New("Cowardly refusing to save to a terminal. Use the -o flag or redirect.")
}
clnt := dockerCli.Client()
responseBody, err := clnt.ContainerExport(context.Background(), opts.container)
if err != nil {
return err
}
defer responseBody.Close()
if opts.output == "" {
_, err := io.Copy(dockerCli.Out(), responseBody)
return err
}
return client.CopyToFile(opts.output, responseBody)
}