getPackagePathInCache static method

String getPackagePathInCache(String packageName, String? version)

returns the cache path of a package with the given packageName and version if version is null the latest version is used

Implementation

static String getPackagePathInCache(String packageName, String? version) {
  version ??= getLatestVersionInCacheFor(packageName).toString();

  String? findHostedDirectory(List<String> hostedUrls) {
    for (final hostedUrl in hostedUrls) {
      final packagePath = path.join(hostedUrl, '$packageName-$version');
      if (Directory(packagePath).existsSync()) {
        return packagePath;
      }
    }
    return null;
  }

  final cacheDir = pubCacheDir;
  final hostedDir = path.join(cacheDir, 'hosted');
  List<String> hostedDirs = [];

  if (Directory(hostedDir).existsSync()) {
    Directory(hostedDir)
        .listSync()
        .map((entity) => entity.path)
        .forEach((path) {
      if (Directory(path).existsSync()) {
        hostedDirs.add(path);
      }
    });
  }

  final envHostedUrl = Platform.environment['PUB_HOSTED_URL'];
  final envHosted =
      envHostedUrl == null ? null : Uri.parse(envHostedUrl).host;

  final List<String> hostPriorities = [
    // first check PUB_HOSTED_URL from environment variable if set
    if (envHosted != null) envHosted,
    // Flutter 3.7 changed the name of the pub.dev directory => first test the old one, then the new one
    'pub.dartlang.org',
    'pub.dev',
  ];

  for (final hostPriority in hostPriorities) {
    final matchingHostedDirs =
        hostedDirs.where((dir) => dir.startsWith(hostPriority)).toList();
    final foundPackagePath = findHostedDirectory(matchingHostedDirs);
    if (foundPackagePath != null) {
      return foundPackagePath;
    }
  }
  return findHostedDirectory(hostedDirs)!;
}