I can not get stdin to work with grind

[kasperpeulen]

I have this task:

#!/usr/bin/env dart
import 'package:git/git.dart';
import 'package:grinder/grinder.dart';

... 

@Task()
Future<Null> createComponent() async {
  await stdin
      .map(SYSTEM_ENCODING.decode)
      .map((s) => s.trim())
      .forEach((component) async {
    new File('lib/components/$component.scss')..createSync();
    new File('lib/components/$component.html')..createSync();
    new File('lib/components/$component.dart')
      ..createSync()
      ..writeAsStringSync('''
import 'package:angular2/core.dart';

@Component(
    selector: '${component.replaceAll('_', '-')}',
    templateUrl: '$component.html',
    styleUrls: const ['$component.css']
)
class ${component.split('_').map((s) => s[0].toUpperCase() + s.substring(1)).join('')} {}
      ''');
    await runGit(['add', '--all']);
  });
}

For some reason this only works I have run the task like:
tool/grind.dart create-component
and not if I run it like:
grind create-component

Not sure if this is a pub bug or a grinder bug.

[zoechi]

I can not get stdin to work with grind

What's not working or what is happening differently than you expect? Any error message?

[zoechi]

If you run it with grind create-component it's running via pub global run and your script is executed in another process AFAIR. There are plans to make pub global run to create an isolate instead.

[kasperpeulen]

So the stdin gives a stream of input from the terminal . Everytime you press enter, it gives you the byes of the input in the terminal.

This works if I run it like this:

tool/grind.dart create-component

But in the other case, it just never gives me any input. No error messages, the stream just never returns any byes from the input.

[devoncarew]

It might be worth investigating whether a simple app run via pub global run can read from stdin (w/ the code above). You can use the --source path option to pub global activate to activate a local script. That would narrow down whether this is a pub issue or a grinder one -

[kasperpeulen]

seems to work

[seaneagan]

So I think the problem is that that the grind script is forwarding stdout and sterr as appropriate here, but it is not doing the same for stdin. I think we just need to add something like process.stdin.addStream(stdin);

[lexaknyazev]

Adding process.stdin.addStream(stdin); to bin/grinder.dart indeed helps.
Can the package be updated?

[vinzenzweber]

I just stumbled upon this issue while implementing a grinder task. Is there any workaround available, or any plan to fix this issue?