geode/loader/src/main.cpp

#include "../core/Core.hpp"
#include "loader/LoaderImpl.hpp"

#include <Geode/loader/IPC.hpp>
#include <Geode/loader/Loader.hpp>
#include <Geode/loader/Log.hpp>
#include <Geode/loader/Mod.hpp>
#include <Geode/loader/Setting.hpp>
#include <Geode/loader/SettingEvent.hpp>
#include <InternalMod.hpp>
#include <array>

USE_GEODE_NAMESPACE();

int geodeEntry(void* platformData);
// platform-specific entry points

#if defined(GEODE_IS_IOS) || defined(GEODE_IS_MACOS)
    #include <dlfcn.h>
    #include <mach-o/dyld.h>
    #include <unistd.h>

std::length_error::~length_error() _NOEXCEPT {} // do not ask...

// camila has an old ass macos and this function turned
// from dynamic to static thats why she needs to define it
// this is what old versions does to a silly girl

__attribute__((constructor)) void _entry() {
    auto dylib = dlopen("GeodeBootstrapper.dylib", RTLD_NOLOAD);
    dlclose(dylib);

    std::array<char, PATH_MAX> gddir;

    uint32_t out = PATH_MAX;
    _NSGetExecutablePath(gddir.data(), &out);

    ghc::filesystem::path gdpath = gddir.data();
    ghc::filesystem::current_path(gdpath.parent_path().parent_path());

    auto workingDir = gdpath.parent_path().parent_path();
    auto libDir = workingDir / "Frameworks";
    auto updatesDir = workingDir / "geode" / "update";

    auto error = std::error_code();

    if (ghc::filesystem::exists(updatesDir / "GeodeBootstrapper.dylib", error) && !error) {
        ghc::filesystem::rename(
            updatesDir / "GeodeBootstrapper.dylib", libDir / "GeodeBootstrapper.dylib", error
        );
        if (error) return;
    }

    geodeEntry(nullptr);
}

#elif defined(GEODE_IS_WINDOWS)
    #include <Windows.h>

DWORD WINAPI loadThread(void* arg) {
    bool canMoveBootstrapper = true;
    if (auto mod = GetModuleHandleA("GeodeBootstrapper.dll")) {
        if (WaitForSingleObject(mod, 1000) != WAIT_OBJECT_0) {
            canMoveBootstrapper = false;
        }
    }

    if (canMoveBootstrapper) {
        auto workingDir = ghc::filesystem::current_path();
        auto updatesDir = workingDir / "geode" / "update";

        auto error = std::error_code();

        if (ghc::filesystem::exists(updatesDir / "GeodeBootstrapper.dll", error) && !error) {
            ghc::filesystem::rename(
                updatesDir / "GeodeBootstrapper.dll", workingDir / "GeodeBootstrapper.dll", error
            );
            if (error) return error.value();
        }
    }

    return geodeEntry(arg);
}

BOOL WINAPI DllMain(HINSTANCE lib, DWORD reason, LPVOID) {
    switch (reason) {
        case DLL_PROCESS_ATTACH:
            // Prevents threads from notifying this DLL on creation or destruction.
            // Kind of redundant for a game that isn't multi-threaded but will provide
            // some slight optimizations if a mod frequently creates and deletes threads.
            DisableThreadLibraryCalls(lib);

            // loading thread
            HANDLE _ = CreateThread(0, 0, loadThread, lib, 0, nullptr);
            if (_) CloseHandle(_);

            break;
    }
    return TRUE;
}
#endif

#define $_ GEODE_CONCAT(unnamedVar_, __LINE__)

static auto $_ =
    listenForSettingChanges<BoolSetting>("show-platform-console", [](BoolSetting* setting) {
        if (setting->getValue()) {
            Loader::get()->openPlatformConsole();
        }
        else {
            Loader::get()->closePlatformConsole();
        }
    });

static auto $_ = listenForIPC("ipc-test", [](IPCEvent* event) -> nlohmann::json {
    return "Hello from Geode!";
});

static auto $_ = listenForIPC("loader-info", [](IPCEvent* event) -> nlohmann::json {
    return Loader::get()->getInternalMod()->getModInfo();
});

static auto $_ = listenForIPC("list-mods", [](IPCEvent* event) -> nlohmann::json {
    std::vector<nlohmann::json> res;

    auto args = event->messageData;
    JsonChecker checker(args);
    auto root = checker.root("").obj();

    auto includeRunTimeInfo = root.has("include-runtime-info").template get<bool>();
    auto dontIncludeLoader = root.has("dont-include-loader").template get<bool>();

    if (!dontIncludeLoader) {
        res.push_back(
            includeRunTimeInfo ? Loader::get()->getInternalMod()->getRuntimeInfo() :
                                 Loader::get()->getInternalMod()->getModInfo().toJSON()
        );
    }

    for (auto& mod : Loader::get()->getAllMods()) {
        res.push_back(includeRunTimeInfo ? mod->getRuntimeInfo() : mod->getModInfo().toJSON());
    }

    return res;
});

int geodeEntry(void* platformData) {
    // setup internals

    if (!Loader::get()) {
        LoaderImpl::get()->platformMessageBox(
            "Unable to Load Geode!",
            "There was an unknown fatal error setting up "
            "internal tools and Geode can not be loaded. "
            "(Loader::get returned nullptr)"
        );
        return 1;
    }

    if (!geode::core::hook::initialize()) {
        LoaderImpl::get()->platformMessageBox(
            "Unable to load Geode!",
            "There was an unknown fatal error setting up "
            "internal tools and Geode can not be loaded. "
            "(Unable to set up hook manager)"
        );
        return 1;
    }

    geode_implicit_load(InternalMod::get());

    // set up loader, load mods, etc.
    if (!LoaderImpl::get()->setup()) {
        LoaderImpl::get()->platformMessageBox(
            "Unable to Load Geode!",
            "There was an unknown fatal error setting up "
            "the loader and Geode can not be loaded."
        );
        LoaderImpl::get()->reset();
        return 1;
    }

    log::debug("Set up loader");

    if (InternalMod::get()->getSettingValue<bool>("show-platform-console")) {
        Loader::get()->openPlatformConsole();
    }

    log::debug("Entry done.");

    return 0;
}