jathak / cli_repl Goto Github PK

Hi! Thanks for writing this, it's just what I needed!

There's just one issue I found...

Running this code:

await for (var line in repl.runAsync()) {
    print("you typed $line");
    break;
}
print("Bye");

When I type something, I would expect it to exit immediatelly after I hit Enter, but it doesn't, it prints the prompt again, then the next time I hit Enter it finally exits.

Would be nice if it could break first time.

Thanks!

It works on Linux but since keyboard code is platform dependent, some keys like 'backspace' uses different code on Windows. Arrow key not working because stdin on Windows does not work properly.

Just want others to know this limitation.

Take this sample program:

import 'package:cli_repl/cli_repl.dart';

void main() async {
  final repl = Repl(prompt: '> ');
  await for (final answer in repl.runAsync()) {
    if (answer == 'exit') break;
    await Future(() => print("You said '$answer'"));
  }
  print("done");
  await repl.exit();
}

When running this program, the You said x message is always printed after the prompt. This makes writing REPLs that evaluate commands async impossible even when the for-loop body awaits, as in this example.

The expected behaviour is to wait for the body to complete before printing the prompt.