int _main()

in include/poac/subcmd/graph.hpp [107:154]

• 44 lines of code
• 7 McCabe index (conditional complexity)

        int _main(VS&& argv) {
            namespace fs = boost::filesystem;
            namespace exception = core::exception;

            if (const auto output_op = util::argparse::use_get(argv, "-o", "--output")) {
                fs::path output = *output_op;
                if (output.extension() == ".png") {
                    if (util::_command::has_command("dot")) {
                        const auto [g, names] = create_graph();

                        const std::string file_dot = output.stem().string() + ".dot";
                        std::ofstream file(file_dot);
                        boost::write_graphviz(file, g, boost::make_label_writer(&names[0]));

                        util::command("dot -Tpng " + file_dot + " -o " + output.string()).exec();
                        fs::remove(file_dot);

                        io::cli::echo(io::cli::status_done());
                    }
                    else {
                        throw exception::error(
                                "To output with .png you need graphviz.\n"
                                "You need to install the graphviz.\n"
                                "Or please consider outputting in .dot format.");
                    }
                }
                else if (output.extension() == ".dot") {
                    const auto [g, names] = create_graph();
                    std::ofstream file(output.string());
                    boost::write_graphviz(file, g, boost::make_label_writer(&names[0]));
                    io::cli::echo(io::cli::status_done());
                }
                else {
                    throw exception::error(
                            "The extension of the output file must be .dot or .png.");
                }
            }
            else {
                const auto [g, names] = create_graph();
                (void)names; // error: unused variable
                boost::graph_traits<Graph>::edge_iterator itr, end;
                for(tie(itr, end) = edges(g); itr != end; ++itr) {
                    std::cout << boost::get(&Vertex::name, g)[source(*itr, g)] << " -> "
                              << boost::get(&Vertex::name, g)[target(*itr, g)] << '\n';
                }
            }
            return EXIT_SUCCESS;
        }