package runtime type eventChannel chan event type event struct { stdout string stderr string err error errorOnExit bool } func (ec eventChannel) message(msg string) { ec <- event{ stdout: msg, } } func (ec eventChannel) exitWithError(err error) { ec <- event{ err: err, errorOnExit: true, } } func (ec eventChannel) exitWithErrorMessage(msg string, err error) { ec <- event{ stderr: msg, err: err, errorOnExit: true, } }