问libgit:在提交中获取文件的最快方法

EN

std::vector<std::string> Commit::getAffectedFiles() const {
  git_tree* tree = nullptr;
  git_tree* tree2 = nullptr;
  int error = git_commit_tree(&tree, get());
  throw_on_error(error);

  try {
    error = git_commit_tree(&tree2, parent(0).get());
  } catch (GitException e) {
    tree2 = nullptr; // probably initial commit
  }
  git_diff* diff = nullptr;
  git_diff_tree_to_tree(&diff, getRepo(), tree2, tree, 0);  

  std::vector<std::string> ret;
  git_diff_foreach(diff,
  [](const git_diff_delta* entry, float progress, void* payload) {
    std::string str = entry->old_file.path;
    ((std::vector<std::string>*)payload)->push_back(str);
    return 0;
  }, nullptr, nullptr, nullptr, &ret);
  git_tree_free(tree);
  git_tree_free(tree2);
  git_diff_free(diff);
  return ret; 
}

git log --stat > /dev/null