private void assertIsNotSubmodule()

in src/main/java/com/googlesource/gerrit/plugins/deleteproject/DeletePreconditions.java [151:171]

• 19 lines of code
• 5 McCabe index (conditional complexity)

  private void assertIsNotSubmodule(Project.NameKey projectNameKey)
      throws CannotDeleteProjectException {
    try (Repository repo = repoManager.openRepository(projectNameKey);
        MergeOpRepoManager mergeOp = mergeOpProvider.get()) {
      Set<BranchNameKey> branches =
          repo.getRefDatabase().getRefsByPrefix(REFS_HEADS).stream()
              .map(ref -> BranchNameKey.create(projectNameKey, ref.getName()))
              .collect(toSet());
      SubscriptionGraph graph = subscriptionGraphFactory.compute(branches, mergeOp);
      for (BranchNameKey b : branches) {
        if (graph.hasSuperproject(b)) {
          throw new CannotDeleteProjectException("Project is subscribed by other projects.");
        }
      }
    } catch (RepositoryNotFoundException e) {
      // we're trying to delete the repository,
      // so this exception should not stop us
    } catch (IOException | SubmoduleConflictException e) {
      throw new CannotDeleteProjectException("Project is subscribed by other projects.", e);
    }
  }