Method FilesExist

tensorflow/core/platform/env.cc:166–210

}

bool Env::FilesExist(const std::vector<string>& files,
                     std::vector<Status>* status) {
  std::unordered_map<string, std::vector<string>> files_per_fs;
  for (const auto& file : files) {
    StringPiece scheme, host, path;
    io::ParseURI(file, &scheme, &host, &path);
    files_per_fs[string(scheme)].push_back(file);
  }

  std::unordered_map<string, Status> per_file_status;
  bool result = true;
  for (auto itr : files_per_fs) {
    FileSystem* file_system = file_system_registry_->Lookup(itr.first);
    bool fs_result;
    std::vector<Status> local_status;
    std::vector<Status>* fs_status = status ? &local_status : nullptr;
    if (!file_system) {
      fs_result = false;
      if (fs_status) {
        Status s = errors::Unimplemented("File system scheme '", itr.first,
                                         "' not implemented");
        local_status.resize(itr.second.size(), s);
      }
    } else {
      fs_result = file_system->FilesExist(itr.second, fs_status);
    }
    if (fs_status) {
      result &= fs_result;
      for (int i = 0; i < itr.second.size(); ++i) {
        per_file_status[itr.second[i]] = fs_status->at(i);
      }
    } else if (!fs_result) {
      // Return early
      return false;
    }
  }

  if (status) {
    for (const auto& file : files) {
      status->push_back(per_file_status[file]);
    }
  }

  return result;
}

Status Env::GetChildren(const string& dir, std::vector<string>* result) {
  FileSystem* fs;