gistfile1.c

static void register_loader(lua_State * L, const char * files_dir) {
    char custom_path[PATH_MAX+1];

    lua_getglobal(L, "package");
    lua_getfield(L, -1, "loaders");
    int num_loaders = lua_objlen(L, -1);
    lua_pushcfunction(L, asset_loader);
    lua_rawseti(L, -2, 2);
    lua_pop(L, 1);

    lua_getfield(L, -1, "path");
    custom_path[0] = ';';
    strcpy(custom_path+1, files_dir);
    strcat(custom_path, "/?.lua");
    lua_pushstring(L, custom_path);
    lua_concat(L, 2);
    lua_setfield(L, -2, "path");
    lua_pop(L, 1);
}