Future formatStdin()

in lib/src/io.dart [16:57]

• 38 lines of code
• 4 McCabe index (conditional complexity)

Future<void> formatStdin(
    FormatterOptions options, List<int>? selection, String name) async {
  var selectionStart = 0;
  var selectionLength = 0;

  if (selection != null) {
    selectionStart = selection[0];
    selectionLength = selection[1];
  }

  var completer = Completer<void>();
  var input = StringBuffer();
  stdin.transform(Utf8Decoder()).listen(input.write, onDone: () {
    var formatter = DartFormatter(
        indent: options.indent,
        pageWidth: options.pageWidth,
        fixes: options.fixes);
    try {
      options.beforeFile(null, name);
      var source = SourceCode(input.toString(),
          uri: name,
          selectionStart: selectionStart,
          selectionLength: selectionLength);
      var output = formatter.formatSource(source);
      options.afterFile(null, name, output,
          changed: source.text != output.text);
    } on FormatterException catch (err) {
      stderr.writeln(err.message());
      exitCode = 65; // sysexits.h: EX_DATAERR
    } catch (err, stack) {
      stderr.writeln('''Hit a bug in the formatter when formatting stdin.
Please report at: github.com/dart-lang/dart_style/issues
$err
$stack''');
      exitCode = 70; // sysexits.h: EX_SOFTWARE
    }

    completer.complete();
  });

  return completer.future;
}