writeStallDumpToDisk function

Future<String?> writeStallDumpToDisk(StallDump dump)

The disk sink: one directory per dump, payload.bin (raw, byte-identical) + meta.json (the pure side's redacted/serialized meta). Returns the meta.json path, or null on any failure (best-effort — the abort path outranks the capture).

Implementation

Future<String?> writeStallDumpToDisk(StallDump dump) async {
  final root = stallDumpDirectory();
  final stamp = dump.dumpedAt.toIso8601String().replaceAll(RegExp('[:.]'), '-');
  final dir = Directory(
    '${root.path}${Platform.pathSeparator}stall-$stamp-${dump.watchdog}',
  );
  dir.createSync(recursive: true);
  final bytes = dump.payloadBytes;
  if (bytes != null) {
    File(
      '${dir.path}${Platform.pathSeparator}payload.bin',
    ).writeAsBytesSync(bytes, flush: true);
  }
  final metaFile = File('${dir.path}${Platform.pathSeparator}meta.json');
  metaFile.writeAsStringSync(serializeStallMeta(dump), flush: true);
  return metaFile.path;
}