elna/cli/main.cpp

#include "elna/cli/cl.hpp"

#include <filesystem>
#include <iostream>
#include <boost/program_options.hpp>

int main(int argc, char **argv)
{
    boost::program_options::options_description visible{ "Allowed options" };
    boost::program_options::options_description description;
    boost::program_options::positional_options_description positional;
    boost::program_options::variables_map variables_map;

    visible.add_options()
        ("help", "Print this help message")
        ("output,o", boost::program_options::value<std::filesystem::path>(), "Output object file")
    ;
    description.add_options()
        ("input", boost::program_options::value<std::filesystem::path>()->required())
    ;
    description.add(visible);
    positional.add("input", 1);

    auto parsed = boost::program_options::command_line_parser(argc, argv)
        .options(description).positional(positional)
        .run();
    boost::program_options::store(parsed, variables_map);
    boost::program_options::notify(variables_map);

    if (variables_map.count("help"))
    {
        std::cout << description << std::endl;
        return 0;
    }
    const auto in_file = variables_map["input"].as<std::filesystem::path>();
    std::filesystem::path out_file;

    if (variables_map.count("output"))
    {
        out_file = variables_map["output"].as<std::filesystem::path>();
    }
    else
    {
        out_file = in_file.filename().replace_extension(".o");
    }
    return elna::cli::compile(in_file, out_file);
}