forward method

@override void forward(ArgResults results, List<String> out)

Appends this flag to out if it was explicitly passed.

Values are emitted as separate --name value tokens so a value that itself contains = (--dart-define BASE_URL=https://…) stays unambiguous.

Implementation

@override
void forward(ArgResults results, List<String> out) {
  if (!results.wasParsed(name)) {
    return;
  }

  // An explicitly empty value is dropped rather than forwarded as `""`,
  // matching how the previous forwarder guarded `--flavor`.
  if (results[name] case final String value when value.isNotEmpty) {
    out
      ..add('--$name')
      ..add(value);
  }
}