static SimplePackage? validate()

in lib/src/package_config_impl.dart [214:267]
52 lines of code
11 McCabe index (conditional complexity)

  static SimplePackage? validate(
      String name,
      Uri root,
      Uri? packageUriRoot,
      LanguageVersion? languageVersion,
      Object? extraData,
      bool relativeRoot,
      void Function(Object error) onError) {
    var fatalError = false;
    var invalidIndex = checkPackageName(name);
    if (invalidIndex >= 0) {
      onError(PackageConfigFormatException(
          'Not a valid package name', name, invalidIndex));
      fatalError = true;
    }
    if (root.isScheme('package')) {
      onError(PackageConfigArgumentError(
          '$root', 'root', 'Must not be a package URI'));
      fatalError = true;
    } else if (!isAbsoluteDirectoryUri(root)) {
      onError(PackageConfigArgumentError(
          '$root',
          'root',
          'In package $name: Not an absolute URI with no query or fragment '
              'with a path ending in /'));
      // Try to recover. If the URI has a scheme,
      // then ensure that the path ends with `/`.
      if (!root.hasScheme) {
        fatalError = true;
      } else if (!root.path.endsWith('/')) {
        root = root.replace(path: root.path + '/');
      }
    }
    if (packageUriRoot == null) {
      packageUriRoot = root;
    } else if (!fatalError) {
      packageUriRoot = root.resolveUri(packageUriRoot);
      if (!isAbsoluteDirectoryUri(packageUriRoot)) {
        onError(PackageConfigArgumentError(
            packageUriRoot,
            'packageUriRoot',
            'In package $name: Not an absolute URI with no query or fragment '
                'with a path ending in /'));
        packageUriRoot = root;
      } else if (!isUriPrefix(root, packageUriRoot)) {
        onError(PackageConfigArgumentError(packageUriRoot, 'packageUriRoot',
            'The package URI root is not below the package root'));
        packageUriRoot = root;
      }
    }
    if (fatalError) return null;
    return SimplePackage._(
        name, root, packageUriRoot, languageVersion, extraData, relativeRoot);
  }