#include <iostream>
#include <fstream>
#include <cstdlib>
#include <filesystem>
#include <unistd.h>

namespace fs = std::filesystem;

bool fileExists(const std::string& fileName) {
 return std::filesystem::exists(fileName);
}

int main() {
 // 执行 Python 脚本获取最新版本和 URL
 for (int i = 0; i <= 2; ++i) {
 std::string pythonScript = "python3 get-newest-version.py " + std::to_string(i);
 int pythonExitCode = system(pythonScript.c_str());
 if (pythonExitCode != 0) {
 std::cerr << "Error: Failed to run Python script" << std::endl;
 return 1;
 }
 }

 // 从文件读取内核下载链接
 std::ifstream file("/tmp/longtermurl.txt");
 if (!file.is_open()) {
 std::cerr << "Error: Unable to open /tmp/longtermurl.txt" << std::endl;
 return 1;
 }

 std::string kernelUrl;
 std::getline(file, kernelUrl);
 file.close();

 // 获取下载文件名
 size_t lastSlash = kernelUrl.find_last_of('/');
 std::string fileName = kernelUrl.substr(lastSlash + 1);

 // 检查文件是否已经存在
 if (!fileExists(fileName)) {
 // 文件不存在,进行下载
 // 下载内核源代码
 std::string downloadCommand = "curl -O " + kernelUrl;
 int downloadResult = system(downloadCommand.c_str());
 if (downloadResult != 0) {
 std::cerr << "Error: Unable to download kernel source code" << std::endl;
 return 1;
 }
 } else {
 // 文件已经存在,输出提示信息
 std::cout << "Kernel source code file already exists: " << fileName << std::endl;
 }

 // ... 其余代码不变 ...

 return 0;
}