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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.
#include "src/utils/cpp/tmp_dir.hpp"
#ifdef __unix__
#include <unistd.h>
#else
#error "Non-unix is not supported yet"
#endif
#include <cstdlib>
#include <string_view>
#include <tuple>
#include "src/buildtool/file_system/file_system_manager.hpp"
#include "src/buildtool/logging/log_level.hpp"
#include "src/buildtool/logging/logger.hpp"
auto TmpDir::Create(std::filesystem::path const& prefix) noexcept -> Ptr {
return CreateImpl(/*parent=*/nullptr, prefix);
}
auto TmpDir::CreateNestedDirectory(TmpDir::Ptr const& parent) noexcept
-> TmpDir::Ptr {
if (parent == nullptr) {
return nullptr;
}
return CreateImpl(parent, parent->GetPath());
}
auto TmpDir::CreateFile(TmpDir::Ptr const& parent,
std::string const& file_name) noexcept -> TmpFile::Ptr {
// Create a new tmp directory to guarantee uniqueness:
auto temp_dir = CreateNestedDirectory(parent);
if (temp_dir == nullptr) {
return nullptr;
}
try {
auto file_path = std::filesystem::weakly_canonical(
std::filesystem::absolute(temp_dir->GetPath() / file_name));
if (not FileSystemManager::CreateFile(file_path)) {
return nullptr;
}
return std::shared_ptr<TmpFile const>{
new TmpFile(std::move(temp_dir), std::move(file_path))};
} catch (...) {
return nullptr;
}
}
auto TmpDir::CreateImpl(TmpDir::Ptr parent,
std::filesystem::path const& path) noexcept -> Ptr {
static constexpr std::string_view kDirTemplate = "tmp.XXXXXX";
// make sure prefix folder exists
if (not FileSystemManager::CreateDirectory(path)) {
Logger::Log(LogLevel::Error,
"TmpDir: could not create prefix directory {}",
path.string());
return nullptr;
}
std::string file_path;
try {
file_path = std::filesystem::weakly_canonical(
std::filesystem::absolute(path / kDirTemplate));
// Create a temporary directory:
if (mkdtemp(file_path.data()) == nullptr) {
return nullptr;
}
return std::shared_ptr<TmpDir const>(
new TmpDir(std::move(parent), file_path));
} catch (...) {
if (not file_path.empty()) {
rmdir(file_path.c_str());
}
}
return nullptr;
}
TmpDir::~TmpDir() noexcept {
// try to remove the tmp dir and all its content
std::ignore = FileSystemManager::RemoveDirectory(tmp_dir_);
}
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