cmake_install.hpp

// Copyright Take Vos 2024.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "../utility/utility.hpp"
#include "../macros.hpp"
#include <filesystem>
#include <string>
#include <fstream>
 
hi_export_module(hikogui.path.cmake_install);
 
hi_export namespace hi { inline namespace v1 {
 
struct cmake_install {
    std::filesystem::path source_dir;
};
 
[[nodiscard]] inline std::optional<cmake_install> parse_cmake_install(std::filesystem::path path) noexcept
{
    if (not std::filesystem::exists(path)) {
        return std::nullopt;
    }
 
    auto line = std::string{};
    try {
        auto fd = std::ifstream{path.string()};
        line = getline(fd, 512);
        fd.close();
 
    } catch (...) {
        return std::nullopt;
    }
 
    auto const cmake_install_start = std::string{"# Install script for directory: "};
    if (not line.starts_with(cmake_install_start)) {
        return std::nullopt;
    }
 
    auto source_dir = std::filesystem::path{line.substr(cmake_install_start.size())};
    if (not std::filesystem::exists(source_dir)) {
        return std::nullopt;
    }
 
    return cmake_install{source_dir};
}
 
}}