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// Copyright 2022 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_OTHER_TOOLS_TMP_DIR_HPP
#define INCLUDED_SRC_OTHER_TOOLS_TMP_DIR_HPP
#include <filesystem>
#include <memory>
#include <string>
#include <utility>
class TmpFile;
class TmpDir final {
public:
using Ptr = std::shared_ptr<TmpDir const>;
TmpDir(TmpDir const&) = delete;
auto operator=(TmpDir const&) -> TmpDir& = delete;
TmpDir(TmpDir&& other) = delete;
auto operator=(TmpDir&&) -> TmpDir& = delete;
~TmpDir() noexcept;
[[nodiscard]] auto GetPath() const& noexcept
-> std::filesystem::path const& {
return tmp_dir_;
}
/// \brief Creates a completely unique directory in a given prefix path.
[[nodiscard]] static auto Create(
std::filesystem::path const& prefix) noexcept -> Ptr;
/// \brief Create a new nested temporary directory. This nested directory
/// remains valid even if the parent directory goes out of scope.
[[nodiscard]] static auto CreateNestedDirectory(
TmpDir::Ptr const& parent) noexcept -> Ptr;
/// \brief Create a new unique temporary file. To guarantee uniqueness,
/// every file gets created in a new temporary directory. This file remains
/// valid even if the parent directory goes out of scope.
[[nodiscard]] static auto CreateFile(
TmpDir::Ptr const& parent,
std::string const& file_name = "file") noexcept
-> std::shared_ptr<TmpFile const>;
private:
explicit TmpDir(TmpDir::Ptr parent, std::filesystem::path path) noexcept
: parent_{std::move(parent)}, tmp_dir_{std::move(path)} {}
[[nodiscard]] static auto CreateImpl(
TmpDir::Ptr parent,
std::filesystem::path const& path) noexcept -> Ptr;
TmpDir::Ptr parent_;
std::filesystem::path tmp_dir_;
};
class TmpFile final {
friend class TmpDir;
public:
using Ptr = std::shared_ptr<TmpFile const>;
TmpFile(TmpFile const&) = delete;
auto operator=(TmpFile const&) -> TmpFile& = delete;
TmpFile(TmpFile&& other) = delete;
auto operator=(TmpFile&&) -> TmpFile& = delete;
~TmpFile() noexcept = default;
[[nodiscard]] auto GetPath() const& noexcept
-> std::filesystem::path const& {
return file_path_;
}
private:
explicit TmpFile(TmpDir::Ptr parent,
std::filesystem::path file_path) noexcept
: parent_{std::move(parent)}, file_path_{std::move(file_path)} {}
TmpDir::Ptr parent_;
std::filesystem::path file_path_;
};
#endif // INCLUDED_SRC_OTHER_TOOLS_TMP_DIR_HPP
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