Function attachContainer

cli/command/container/run.go:269–315

(ctx context.Context, dockerCli command.Cli, containerID string, errCh *chan error, config *container.Config, options client.ContainerAttachOptions)

}

func attachContainer(ctx context.Context, dockerCli command.Cli, containerID string, errCh *chan error, config *container.Config, options client.ContainerAttachOptions) (func(), error) {
	resp, errAttach := dockerCli.Client().ContainerAttach(ctx, containerID, options)
	if errAttach != nil {
		return nil, errAttach
	}

	var (
		out, cerr io.Writer
		in        io.ReadCloser
	)
	if options.Stdin {
		in = dockerCli.In()
	}
	if options.Stdout {
		out = dockerCli.Out()
	}
	if options.Stderr {
		if config.Tty {
			cerr = dockerCli.Out()
		} else {
			cerr = dockerCli.Err()
		}
	}

	ch := make(chan error, 1)
	*errCh = ch

	go func() {
		ch <- func() error {
			streamer := hijackedIOStreamer{
				streams:      dockerCli,
				inputStream:  in,
				outputStream: out,
				errorStream:  cerr,
				resp:         resp.HijackedResponse,
				tty:          config.Tty,
				detachKeys:   options.DetachKeys,
			}

			if errHijack := streamer.stream(ctx); errHijack != nil {
				return errHijack
			}
			return errAttach
		}()
	}()
	return resp.HijackedResponse.Close, nil
}

// withHelp decorates the error with a suggestion to use "--help".
func withHelp(err error, commandName string) error {