computeDirectoryDiff method

Future<List<FileDiff>> computeDirectoryDiff(String oldDir, String newDir)

Compute diffs for every file that differs between oldDir and newDir.

Implementation

Future<List<FileDiff>> computeDirectoryDiff(
  String oldDir,
  String newDir,
) async {
  final oldFiles = await _listFiles(oldDir);
  final newFiles = await _listFiles(newDir);
  final allRelative = <String>{...oldFiles, ...newFiles};
  final diffs = <FileDiff>[];

  for (final rel in allRelative) {
    final oldPath = '$oldDir/$rel';
    final newPath = '$newDir/$rel';
    final oldFile = File(oldPath);
    final newFile = File(newPath);

    final oldText = await oldFile.exists()
        ? await oldFile.readAsString()
        : '';
    final newText = await newFile.exists()
        ? await newFile.readAsString()
        : '';

    if (oldText == newText) continue;

    final hunks = computeDiff(oldText, newText);
    final stats = _computeStats(hunks);
    diffs.add(FileDiff(path: rel, oldPath: rel, hunks: hunks, stats: stats));
  }
  return diffs;
}