healDanglingSpmLinks function

({List<String> healed, List<String> unresolved}) healDanglingSpmLinks(String baseDir)

Repairs symlinks under a plugin's SPM Sources/ trees whose target is gone: the flat <platform>/Sources/ and every nested <platform>/<pkg>/Sources/ that sits next to a Package.swift, for iOS and macOS. A dangling link is repointed at the first place its file lives now — <platform>/Classes/, then lib/src/generated/swift/ — so a moved or deleted bridge copy no longer breaks flutter pub get ("Cannot resolve symbolic links"). Links with nowhere to point are reported, not guessed.

Returns the healed and unresolved link paths, relative to baseDir.

Implementation

({List<String> healed, List<String> unresolved}) healDanglingSpmLinks(String baseDir) {
  final healed = <String>[];
  final unresolved = <String>[];
  bool exists(String path) => FileSystemEntity.typeSync(path) != FileSystemEntityType.notFound;

  for (final platform in ['ios', 'macos']) {
    final platformDir = Directory(p.join(baseDir, platform));
    if (!platformDir.existsSync()) continue;
    final sourcesDirs = [
      p.join(platformDir.path, 'Sources'),
      for (final d in platformDir.listSync().whereType<Directory>())
        if (File(p.join(d.path, 'Package.swift')).existsSync()) p.join(d.path, 'Sources'),
    ];
    for (final sources in sourcesDirs) {
      final dir = Directory(sources);
      if (!dir.existsSync()) continue;
      for (final link in dir.listSync(recursive: true, followLinks: false).whereType<Link>()) {
        if (exists(link.path)) continue; // typeSync follows the link: it resolves.
        final name = p.basename(link.path);
        final target = [
          p.join(platformDir.path, 'Classes', name),
          p.join(baseDir, 'lib', 'src', 'generated', 'swift', name),
        ].where(exists).firstOrNull;
        final rel = p.relative(link.path, from: baseDir);
        if (target == null) {
          unresolved.add(rel);
          continue;
        }
        try {
          link.updateSync(p.relative(target, from: p.dirname(link.path)));
          healed.add(rel);
        } catch (_) {
          unresolved.add(rel);
        }
      }
    }
  }
  return (healed: healed, unresolved: unresolved);
}