bool _checkConflict()

in lib/src/package_config_impl.dart [420:454]
26 lines of code
6 McCabe index (conditional complexity)

  bool _checkConflict(_PackageTrieNode node, SimplePackage newPackage,
      void Function(Object error) onError) {
    var existingPackage = node.package;
    if (existingPackage != null) {
      // Trying to add package that is inside the existing package.
      // 1) If it's an exact match it's not allowed (i.e. the roots can't be
      //    the same).
      if (newPackage.root.path.length == existingPackage.root.path.length) {
        onError(ConflictException(
            newPackage, existingPackage, ConflictType.sameRoots));
        return true;
      }
      // 2) The existing package has a packageUriRoot thats inside the
      //    root of the new package.
      if (_beginsWith(0, newPackage.root.toString(),
          existingPackage.packageUriRoot.toString())) {
        onError(ConflictException(
            newPackage, existingPackage, ConflictType.interleaving));
        return true;
      }

      // For internal reasons we allow this (for now). One should still never do
      // it thouh.
      // 3) The new package is inside the packageUriRoot of existing package.
      if (_disallowPackagesInsidePackageUriRoot) {
        if (_beginsWith(0, existingPackage.packageUriRoot.toString(),
            newPackage.root.toString())) {
          onError(ConflictException(
              newPackage, existingPackage, ConflictType.insidePackageRoot));
          return true;
        }
      }
    }
    return false;
  }