func (daemon *Daemon) containerAttach(container *container.Container, stdin io.ReadCloser, stdout, stderr io.Writer, logs, stream bool, keys []byte) error {
if logs {
logDriver, err := daemon.getLogger(container)
if err != nil {
return err
}
cLog, ok := logDriver.(logger.LogReader)
if !ok {
return logger.ErrReadLogsNotSupported
}
logs := cLog.ReadLogs(logger.ReadConfig{Tail: -1})
LogLoop:
for {
select {
case msg, ok := <-logs.Msg:
if !ok {
break LogLoop
}
if msg.Source == "stdout" && stdout != nil {
stdout.Write(msg.Line)
}
if msg.Source == "stderr" && stderr != nil {
stderr.Write(msg.Line)
}
case err := <-logs.Err:
logrus.Errorf("Error streaming logs: %v", err)
break LogLoop
}
}
}
daemon.LogContainerEvent(container, "attach")
//stream
if stream {
var stdinPipe io.ReadCloser
if stdin != nil {
r, w := io.Pipe()
go func() {
defer w.Close()
defer logrus.Debugf("Closing buffered stdin pipe")
io.Copy(w, stdin)
}()
stdinPipe = r
}
<-container.Attach(stdinPipe, stdout, stderr, keys)
// If we are in stdinonce mode, wait for the process to end
// otherwise, simply return
if container.Config.StdinOnce && !container.Config.Tty {
container.WaitStop(-1 * time.Second)
}
}
return nil
}
func (b *Builder) run(c *container.Container) error {
var errCh chan error
if b.Verbose {
errCh = c.Attach(nil, b.Stdout, b.Stderr)
}
//start the container
if err := b.docker.Start(c); err != nil {
return err
}
finished := make(chan struct{})
defer close(finished)
go func() {
select {
case <-b.cancelled:
logrus.Debugln("Build cancelled, killing and removing container:", c.ID)
b.docker.Kill(c)
b.removeContainer(c.ID)
case <-finished:
}
}()
if b.Verbose {
// Block on reading output from container, stop on err or chan closed
if err := <-errCh; err != nil {
return err
}
}
// Wait for it to finish
if ret, _ := c.WaitStop(-1 * time.Second); ret != 0 {
// TODO: change error type, because jsonmessage.JSONError assumes HTTP
return &jsonmessage.JSONError{
Message: fmt.Sprintf("The command '%s' returned a non-zero code: %d", b.runConfig.Cmd.ToString(), ret),
Code: ret,
}
}
return nil
}