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// Copyright Contributors to the DNF5 project.
// Copyright Contributors to the libdnf project.
// SPDX-License-Identifier: LGPL-2.1-or-later
//
// This file is part of libdnf: https://github.com/rpm-software-management/libdnf/
//
// Libdnf is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 2.1 of the License, or
// (at your option) any later version.
//
// Libdnf is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with libdnf. If not, see <https://www.gnu.org/licenses/>.
#ifndef LIBDNF5_UTILS_FS_TEMP_HPP
#define LIBDNF5_UTILS_FS_TEMP_HPP
#include "file.hpp"
#include "libdnf5/defs.h"
#include <filesystem>
#include <optional>
#include <string>
namespace libdnf5::utils::fs {
/// Object that creates and holds a temp directory.
/// The directory gets removed when the object is deleted.
class LIBDNF_API TempDir {
public:
/// Creates a temporary directory in the system temporary directory path.
explicit TempDir(const std::string & name_prefix);
/// Creates a temporary directory in `destdir`.
TempDir(std::filesystem::path destdir, const std::string & name_prefix);
TempDir(const TempDir &) = delete;
TempDir(TempDir && src) noexcept;
TempDir & operator=(const TempDir &) = delete;
TempDir & operator=(TempDir && src) noexcept;
~TempDir();
/// Releases the temporary directory, meaning it will no longer be deleted
/// on destruction.
void release() noexcept;
const std::filesystem::path & get_path() const noexcept { return path; }
private:
std::filesystem::path path;
};
/// A mkstemp wrapper that creates and owns a temporary file, which will be
/// deleted in the destructor unless released. Throws instances of
/// `libdnf5::FileSystemError` on any I/O failure.
class LIBDNF_API TempFile {
public:
/// Creates a temporary file in the system temporary directory path.
///
/// @param name_prefix The prefix of the filename to which ".XXXXXX" will be appended.
explicit TempFile(const std::string & name_prefix);
/// Creates a temporary file in `destdir`.
///
/// @param destdir The directory in which the file will be created.
/// @param name_prefix The prefix of the filename to which ".XXXXXX" will be appended.
TempFile(std::filesystem::path destdir, const std::string & name_prefix);
TempFile(const TempFile &) = delete;
TempFile(TempFile && src) noexcept;
TempFile & operator=(const TempFile &) = delete;
TempFile & operator=(TempFile &&);
~TempFile();
/// Open the TempFile as a File object.
///
/// @param mode The mode for the file, passed to `::fdopen()`.
File & open_as_file(const char * mode);
/// If this TempFile has been opened as File (via `open_as_file()`), unsets
/// and destroys that File (automatically closing upon destruction).
/// Otherwise closes the open file descriptor.
void close();
/// Releases the temporary file, meaning it will no longer be closed or
/// deleted on destruction. If open as File (via `open_as_file()`), releases
/// the File by calling its `release()` method and unsets and destroys the
/// File.
void release() noexcept;
const std::filesystem::path & get_path() const noexcept { return path; }
int get_fd() const noexcept { return fd; }
std::optional<File> & get_file() noexcept { return file; }
private:
std::filesystem::path path;
int fd = -1;
std::optional<File> file;
};
} // namespace libdnf5::utils::fs
#endif // LIBDNF5_UTILS_FS_TEMP_HPP
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