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// Copyright 2024 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.
#ifndef INCLUDED_SRC_BUILDTOOL_COMMON_GIT_HASHES_CONVERTER_HPP
#define INCLUDED_SRC_BUILDTOOL_COMMON_GIT_HASHES_CONVERTER_HPP
#include <mutex> //std::unique_lock
#include <optional>
#include <shared_mutex>
#include <string>
#include <unordered_map>
#include <utility>
#include "src/buildtool/crypto/hash_function.hpp"
#include "src/buildtool/logging/log_level.hpp"
#include "src/buildtool/logging/logger.hpp"
class GitHashesConverter final {
using git_hash = std::string;
using compat_hash = std::string;
using git_repo = std::string;
using GitToCompatibleMap = std::unordered_map<git_hash, compat_hash>;
using CompatibleToGitMap =
std::unordered_map<compat_hash, std::pair<git_hash, git_repo>>;
public:
[[nodiscard]] static auto Instance() noexcept -> GitHashesConverter& {
static GitHashesConverter instance;
return instance;
}
[[nodiscard]] auto RegisterGitEntry(std::string const& git_hash,
std::string const& data,
std::string const& repo)
-> compat_hash {
{
std::shared_lock lock{mutex_};
auto it = git_to_compatible_.find(git_hash);
if (it != git_to_compatible_.end()) {
return it->second;
}
}
// This is only used in compatible mode.
HashFunction const hash_function{HashFunction::Type::PlainSHA256};
auto compatible_hash = hash_function.PlainHashData(data).HexString();
std::unique_lock lock{mutex_};
git_to_compatible_[git_hash] = compatible_hash;
compatible_to_git_[compatible_hash] = {git_hash, repo};
return compatible_hash;
}
[[nodiscard]] auto GetGitEntry(std::string const& compatible_hash)
-> std::optional<std::pair<git_hash const&, git_repo const&>> {
std::shared_lock lock{mutex_};
auto it = compatible_to_git_.find(compatible_hash);
if (it != compatible_to_git_.end()) {
return it->second;
}
Logger::Log(LogLevel::Warning,
"Unable to get the git-sha1 code associated to {}",
compatible_hash);
return std::nullopt;
}
private:
explicit GitHashesConverter() noexcept = default;
GitToCompatibleMap git_to_compatible_;
CompatibleToGitMap compatible_to_git_;
std::shared_mutex mutex_;
};
#endif // INCLUDED_SRC_BUILDTOOL_COMMON_GIT_HASHES_CONVERTER_HPP
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