looper/main.cpp

#include "options.hpp"
#include "backend.hpp"
#include "daemon_backend.hpp"
#include "proxy_backend.hpp"
#include "log.hpp"
#include "thirdparty/CLI11.hpp"
#include "data.h"
#include "license.hpp"
#include "assets/assets.h"
using namespace Looper;
using namespace Looper::Options;
using namespace Looper::Log;
#ifdef __EMSCRIPTEN__
extern "C" {
    void quit();
}
#endif
std::unordered_set<LicenseData> license_data;
std::unordered_set<LicenseData> &get_license_data() {
    return license_data;
}
int main(int argc, char **argv) {
    std::vector<std::string> args;
    for (int i = 1; i < argc; i++) {
        args.push_back(std::string(argv[i]));
    }
    CLI::App app{DESCRIPTION};
    std::string filename = "";
    app.allow_extras();
    int log_level;
    std::string ui_backend_option = "";
    bool full_help = false;
    bool open_window = false;
    app.add_option("-l, --log-level", LogStream::log_level, "Sets the minimum log level to display in the logs.");
    app.add_option("-u, --ui-backend", ui_backend_option, "Specifies which UI backend to use.");
#ifdef DBUS_ENABLED
    bool daemonize = false;
    bool disable_gui = false;
    bool quit = false;
    app.add_flag("-d, --daemon", daemonize, "Daemonizes the program.");
    app.add_flag("-n, --no-gui", disable_gui, "Don't open the GUI when there is a daemon and there are settings or commands for it. Ignored in daemon mode, or when no changes in state are issued.");
    app.add_flag("-q, --quit", quit, "Quits an existing instance.");
#endif
    try {
        app.parse(args);
    } catch (const CLI::ParseError &e) {
        if (app.get_help_ptr()->get_callback_run()) {
            full_help = true;
        } else {
            exit(app.exit(e));
        }
    }
#ifdef DBUS_ENABLED
    if (daemonize) {
        ui_backend_option = "daemon";
    }
#endif
    args.clear();
    args = app.remaining(false);
    int new_argc = args.size();
    char **new_argv = (char**)malloc(new_argc * sizeof(char*));
    init_logging();

#ifdef DBUS_ENABLED
    if (quit) {
        DBusAPISender *sender = DBusAPISender::Create();
        if (sender != nullptr) {
            sender->Quit();
        } else {
            ERROR.writeln("Did not find existing instance to quit.");
            return 1;
        }
        return 0;
    }
#endif
    {
        auto looper_mit = LicenseData("Looper (MIT)", "MIT");
        auto looper_gpl = LicenseData("Looper (GPL)", "GPL-3.0-or-later");
        auto looper = LicenseData("Looper", "MIT OR GPL-3.0-or-later");
        auto tomlpp = LicenseData("TOML++", "MIT");
        auto smx = LicenseData("SDL Mixer X", "Zlib");
        auto cli11 = LicenseData("CLI11", "BSD-3-Clause");
        auto jsoncpp = LicenseData("JsonCpp", "MIT");
        auto soundtouch = LicenseData("SoundTouch", "LGPL-2.1-only");
        LOAD_LICENSE(looper_mit, looper_mit);
        LOAD_LICENSE(looper_gpl, looper_gpl);
        LOAD_LICENSE(looper, looper);
        LOAD_LICENSE(tomlpp, tomlplusplus);
        LOAD_LICENSE(smx, sdl_mixer_x);
        LOAD_LICENSE(cli11, cli11);
        LOAD_LICENSE(jsoncpp, jsoncpp);
        LOAD_LICENSE(soundtouch, lgpl_2_1);
        license_data.insert(looper);
        license_data.insert(looper_gpl);
        license_data.insert(looper_mit);
        license_data.insert(tomlpp);
        license_data.insert(smx);
        license_data.insert(cli11);
        license_data.insert(jsoncpp);
        license_data.insert(soundtouch);
    }
    DEBUG.writeln("Command line arguments after first parse:");
    for (size_t i = 0; i < new_argc; i++) {
        auto &arg = args[i];
        DEBUG.writefln(" - '%s'", arg.c_str());
        new_argv[i] = strdup(arg.c_str());
    }
    DEBUG.writeln("Initializing frontends...");
    init_backends();
#ifdef DBUS_ENABLED
    ProxyGlueBackend *proxy_backend = nullptr;
    if ((disable_gui && !daemonize) || quit) {
        if (!DBusAPISender::isOnlyInstance()) {
            UIBackend::register_backend<ProxyGlueBackend>();
            if (disable_gui) {
                proxy_backend = UIBackend::get_backend<ProxyGlueBackend>().value_or(nullptr);
            }
        }
        if (quit && proxy_backend == nullptr) {
            proxy_backend = UIBackend::get_backend<ProxyGlueBackend>().value_or(nullptr);
        }
    }
    if (daemonize) {
        UIBackend::register_backend<DaemonGlueBackend>();
    }
#endif
    for (auto kv : UIBackend::backends) {
        kv.second->add_licenses();
    }
    DEBUG.writeln("Loaded frontends: ");
    for (auto kv : UIBackend::backends) {
        DEBUG.writefln(" - '%s'", kv.first.c_str());
    }
    DEBUG.writeln("Loading options file...");
    load_options();
    std::string backend_id = get_option<std::string>("ui.frontend", "imgui");
    UIBackend *backend = UIBackend::get_backend(ui_backend_option).value_or(UIBackend::get_backend(backend_id).value_or(UIBackend::get_first_backend()));
    int output = 0;
    if (backend == nullptr) {
        ERROR.writeln("No UI backend could be found.");
        return -1;
    } else {
        DEBUG.writefln("Using backend: '%s'...", backend->get_id().c_str());
        UIBackend::running_ui_backend = backend;
        if (full_help) {
            args.clear();
            args.push_back("--help");
        }
        try {
#ifdef DBUS_ENABLED
            if (proxy_backend != nullptr && !quit) {
                if (!proxy_backend->run(args, new_argc, new_argv)) {
                    throw 0;
                }
                proxy_backend = nullptr;
            }
            if (!quit) {
                UIBackend::unregister_backend<ProxyGlueBackend>();
            }
#endif
            output = backend->run(args, new_argc, new_argv);
#ifdef DBUS_ENABLED
            if (quit && proxy_backend != nullptr) {
                proxy_backend->quitDaemon();
                proxy_backend->unregister_self();
            }
#endif
        } catch (int return_code) {
            if (full_help) {
                std::string helpstr = app.help();
                helpstr = helpstr.substr(helpstr.find("\n") + 1);
                helpstr = helpstr.substr(helpstr.find("\n") + 1);
                helpstr = helpstr.substr(helpstr.find("\n") + 1);
                helpstr = helpstr.substr(helpstr.find("\n") + 1);
                helpstr = helpstr.substr(helpstr.find("\n") + 1);
                printf("%s", helpstr.c_str());
            }
            output = return_code;
        }
    }
    DEBUG.writeln("Exiting...");
    UIBackend::deinit_backends();
    for (int i = 0; i < new_argc; i++) {
        free(new_argv[i]);
    }
    free(new_argv);
    save_options();

#ifdef __EMSCRIPTEN__
    quit();
#endif
    return output;
}