Function attach

cli/command/swarm/ca.go:113–140

(ctx context.Context, dockerCLI command.Cli, opts caOptions)

}

func attach(ctx context.Context, dockerCLI command.Cli, opts caOptions) error {
	apiClient := dockerCLI.Client()
	errChan := make(chan error, 1)
	pipeReader, pipeWriter := io.Pipe()

	go func() {
		errChan <- progress.RootRotationProgress(ctx, apiClient, pipeWriter)
	}()

	if opts.quiet {
		go io.Copy(io.Discard, pipeReader)
		return <-errChan
	}

	err := jsonstream.Display(ctx, pipeReader, dockerCLI.Out())
	if err == nil {
		err = <-errChan
	}
	if err != nil {
		return err
	}

	res, err := apiClient.SwarmInspect(ctx, client.SwarmInspectOptions{})
	if err != nil {
		return err
	}
	return displayTrustRoot(dockerCLI.Out(), res)
}

func displayTrustRoot(out io.Writer, info client.SwarmInspectResult) error {
	if info.Swarm.ClusterInfo.TLSInfo.TrustRoot == "" {