// Copyright 2023 Huawei Cloud Computing Technology Co., Ltd. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. #include "src/buildtool/crypto/hash_function.hpp" #include #include #include #include "src/buildtool/logging/log_level.hpp" #include "src/buildtool/logging/logger.hpp" [[nodiscard]] auto HashFunction::ComputeHashFile( const std::filesystem::path& file_path, bool as_tree) noexcept -> std::optional> { static constexpr std::size_t kChunkSize{4048}; try { auto hasher = Hasher(); auto size = std::filesystem::file_size(file_path); if (HashType() == JustHash::Native) { hasher.Update( (as_tree ? std::string{"tree "} : std::string{"blob "}) + std::to_string(size) + '\0'); } std::string chunk{}; chunk.resize(kChunkSize); std::ifstream file_reader(file_path.string(), std::ios::binary); if (file_reader.is_open()) { auto chunk_size = gsl::narrow(chunk.size()); do { file_reader.read(chunk.data(), chunk_size); auto count = file_reader.gcount(); hasher.Update(chunk.substr(0, gsl::narrow(count))); } while (file_reader.good()); file_reader.close(); return std::make_pair(std::move(hasher).Finalize(), size); } } catch (std::exception const& e) { Logger::Log(LogLevel::Debug, "Error while trying to hash {}: {}", file_path.string(), e.what()); } return std::nullopt; }