loop method
Runs a shell prompt in a loop.
Implementation
Stream<String> loop() {
var controller = StreamController<String>();
var doRead;
doRead = () {
if (_stop) {
_stop = false;
return;
}
Prompter(message).prompt().then((it) {
controller.add(it);
Future(doRead);
});
};
Future(doRead);
return controller.stream;
}