Future<void> _runPubGetOnPackages(List<Directory> packages) async {
  ...
  try {
    ...
    for (final Directory dir in packages) {
      unawaited(queue.add(() async {
        final Stopwatch stopwatch = Stopwatch();
        stopwatch.start();
        await pub.get(
          context: PubContext.updatePackages,
          project: FlutterProject.fromDirectory(dir),
          // All dependencies should already have been downloaded by the fake
          // package, so the concurrent checks can all happen offline.
          offline: true,
          outputMode: PubOutputMode.none,
        );
        stopwatch.stop();
        final double seconds = stopwatch.elapsedMilliseconds / 1000.0;
        final String relativeDir = globals.fs.path.relative(dir.path, from: Cache.flutterRoot);
        globals.printStatus('Ran pub get in $relativeDir in ${seconds.toStringAsFixed(1)}s...');
      }));
      count += 1;
    }
    ...
  } catch (exception) { // ignore: avoid_catches_without_on_clauses
    status.cancel();
    rethrow;
  }
  ...
}

@override
Future<FlutterCommandResult> runCommand() async {
  final List<Directory> packages = runner!.getRepoPackages();
  ...
  await _runPubGetOnPackages(packages);
  return FlutterCommandResult.success();
}

static List<String> _gatherProjectPaths(String rootPath) {
  if (globals.fs.isFileSync(globals.fs.path.join(rootPath, '.dartignore'))) {
    return <String>[];
  }
  final List<String> projectPaths = globals.fs.directory(rootPath)
    .listSync(followLinks: false)
    .expand((FileSystemEntity entity) {
      if (entity is Directory && !globals.fs.path.split(entity.path).contains('.dart_tool')) {
        return _gatherProjectPaths(entity.path);
      }
      return <String>[];
    })
    .toList();
  if (globals.fs.isFileSync(globals.fs.path.join(rootPath, 'pubspec.yaml'))) {
    projectPaths.add(rootPath);
  }
  return projectPaths;
}

find [path] -name "pubspec.yaml" -exec dirname {} \; | xargs -I {} flutter pub get -C {}

find . -name "pubspec.yaml" -exec dirname {} \; | xargs -I {} flutter pub get -C {}

find [path] -name "pubspec.yaml" -exec dirname {} \; | xargs -I {} flutter pub upgrade -C {}