ci-tools/cpp/fs_common.cpp

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// Copyright (C) 2025 Simon Quigley <tsimonq2@ubuntu.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <cstring>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <filesystem>
#include <format>
#include <regex>
#include <sstream>
#include "fs_common.h"
#include "utilities.h"
namespace fs = std::filesystem;
// Function to read the entire content of a file into a string
std::string read_file(const fs::path& file_path) {
std::ifstream in_file(file_path, std::ios::binary);
if (in_file) return std::string((std::istreambuf_iterator<char>(in_file)),
std::istreambuf_iterator<char>());
return "";
}
// Function to write a string into a file
void write_file(const fs::path& file_path, const std::string& content) {
std::ofstream out_file(file_path, std::ios::binary);
if (out_file) out_file << content;
}
// Function to perform in-place regex replace on a file
void regex_replace_in_file(const fs::path& file_path, const std::string& pattern, const std::string& replacement) {
std::string content = read_file(file_path);
content = std::regex_replace(content, std::regex(pattern), replacement);
write_file(file_path, content);
}
std::filesystem::path create_temp_directory() {
auto temp_dir = std::filesystem::temp_directory_path() / generate_random_string(32);
std::filesystem::create_directory(temp_dir);
return temp_dir;
}
// Function to copy a directory recursively
void copy_directory(const fs::path& source, const fs::path& destination) {
if (!std::filesystem::exists(source) || !std::filesystem::is_directory(source)) throw std::runtime_error("Source directory does not exist or is not a directory: " + source.string());
// Create the destination directory
std::filesystem::create_directories(destination);
// Copy files and directories recursively
for (const auto& entry : std::filesystem::recursive_directory_iterator(source)) {
auto relative_path = std::filesystem::relative(entry.path(), source);
auto target_path = destination / relative_path;
try {
if (std::filesystem::is_directory(entry)) std::filesystem::create_directory(target_path);
else if (std::filesystem::is_regular_file(entry)) std::filesystem::copy(entry, target_path, std::filesystem::copy_options::overwrite_existing);
} catch (...) {
continue;
}
}
}
// Function to extract excluded files from a copyright file
std::vector<std::string> extract_files_excluded(const std::string& filepath) {
std::ifstream file(filepath);
if (!file.is_open()) throw std::runtime_error("Failed to open file: " + filepath);
std::vector<std::string> files_excluded;
std::string line;
std::regex files_excluded_pattern(R"(Files-Excluded:\s*(.*))");
bool in_files_excluded = false;
while (std::getline(file, line)) {
if (std::regex_match(line, files_excluded_pattern)) {
in_files_excluded = true;
std::smatch match;
if (std::regex_search(line, match, files_excluded_pattern) && match.size() > 1) files_excluded.emplace_back(match[1]);
} else if (in_files_excluded) {
if (!line.empty() && (line[0] == ' ' || line[0] == '\t')) files_excluded.emplace_back(line.substr(1));
else break; // End of Files-Excluded block
}
}
return files_excluded;
}