Function main

package/launchdf.cpp:314–497

int WINAPI wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPWSTR lpCmdLine, _In_ int nShowCmd) {
#else
int main(int argc, char* argv[]) {
#endif
#ifdef WIN32
    // force UTF-8
    std::setlocale(LC_ALL, ".utf8");
#endif
    // initialize steam context
    if (SteamAPI_RestartAppIfNecessary(DFHACK_STEAM_APPID)) {
        exit(0);
    }

    bool nowait = false;
#ifdef WIN32
    std::wstring cmdline(lpCmdLine);
    if (cmdline.find(L"--nowait") != std::wstring::npos)
        nowait = true;
#else
    for (int idx = 0; idx < argc; ++idx) {
        if (strcmp(argv[idx], "--nowait") == 0)
            nowait = true;
    }
#endif

    if (waitForDF(nowait))
        exit(0);

    if (!SteamAPI_Init()) {
        // could not initialize steam context, attempt fallback launch
        exit(wrap_launch(launch_direct) ? 0 : 1);
    }

#ifdef WIN32
    bool wine_detected = is_running_on_wine();
#endif

    bool df_detected = SteamApps()->BIsAppInstalled(DF_STEAM_APPID);

    if (!df_detected) {
        // Steam DF is not installed. Assume DF is installed in same directory as DFHack and do a fallback launch
        exit(wrap_launch(launch_direct) ? 0 : 1);
    }

    // obtain DF and DFHack app paths

    auto get_app_path_from_steam = [] (AppId_t appid) -> std::optional<std::filesystem::path> {
        constexpr auto BUFSIZE = 2048;
        char buf[BUFSIZE] = "";
        int bytes = SteamApps()->GetAppInstallDir(appid, (char*)&buf, BUFSIZE);
        if (bytes <= 0)
            return std::nullopt;
        // steam API includes one or more null terminators after the path, so trim those off
        for (; bytes > 0 && buf[bytes-1] == '\0'; bytes--);
        return std::string(buf, bytes);
        };

    auto opt_dfhack_install_folder = get_app_path_from_steam(DFHACK_STEAM_APPID);
    auto opt_df_install_folder = get_app_path_from_steam(DF_STEAM_APPID);