anchor.diff:  
   import 'package:args/args.dart';
   import 'package:gcloud/db.dart';
  +import 'package:pool/pool.dart';
   
  +import 'package:pub_dev/analyzer/analyzer_client.dart';
   import 'package:pub_dev/package/models.dart';
  -import 'package:pub_dev/package/model_properties.dart';
   import 'package:pub_dev/service/entrypoint/tools.dart';
   
   Future main(List<String> args) async {
  
positive.code:         flutterCount++;
        }
  
        if (pubspec.homepage == null) {
          addHomepage('empty');
        } else {
          try {
            final uri = Uri.parse(pubspec.homepage);
            if (uri.scheme != 'http' && uri.scheme != 'https') {
              addHomepage('not_http');
            } else {
              addHomepage(uri.host);
            }
          } catch (_) {
            addHomepage('parse_error');
          }
        }
      }
    });
    homepageDomains = _sortDomains(homepageDomains);
  
    final Map report = {
      'counters': {
        'total': totalCount,
        'flutter': {
          'total': flutterCount,
          'plugins': flutterPlugins.length,
          'sdk': flutterSdks.length,
        },
      },
      'flutter': {
        'plugins': flutterPlugins,
        'sdk': flutterSdks,
      },
      'homepage': homepageDomains,
    };
    final String json = JsonEncoder.withIndent('  ').convert(report);
    if (argv['output'] != null) {
  
negative.code:   final List<String> flutterPlugins = [];
    final List<String> flutterSdks = [];
  
    final homepageScheme = _Counter();
    final licenseCounts = _Counter();
    final licenseNames = _Counter();
    final packagesWithMoreThanOneLicense = _Counter();
    final grantedPoints = _Counter();
    final tags = _Counter();
  
    await withProdServices(() async {
      Future<void> process(Package p) async {
        totalCount++;
        if (totalCount % 25 == 0) {
          print('Reading package #$totalCount: ${p.name}');
        }
  
        final latest =
            await dbService.lookupValue<PackageVersion>(p.latestVersionKey);
        final pubspec = latest.pubspec;
  
        if (pubspec.hasFlutterPlugin) {
          flutterPlugins.add(p.name);
  