Function luaSortArray

src/tendisplus/script/lua_state.cpp:190–213

Sort the array currently in the stack. We do this to make the output * of commands like KEYS or SMEMBERS something deterministic when called * from Lua (to play well with AOf/replication). * * The array is sorted using table.sort itself, and assuming all the * list elements are strings. */

 * The array is sorted using table.sort itself, and assuming all the
 * list elements are strings. */
void luaSortArray(lua_State* lua) {
  /* Initial Stack: array */
  lua_getglobal(lua, "table");
  lua_pushstring(lua, "sort");
  lua_gettable(lua, -2);  /* Stack: array, table, table.sort */
  lua_pushvalue(lua, -3); /* Stack: array, table, table.sort, array */
  if (lua_pcall(lua, 1, 0, 0)) {
    /* Stack: array, table, error */

    /* We are not interested in the error, we assume that the problem is
     * that there are 'false' elements inside the array, so we try
     * again with a slower function but able to handle this case, that
     * is: table.sort(table, __redis__compare_helper) */
    lua_pop(lua, 1);             /* Stack: array, table */
    lua_pushstring(lua, "sort"); /* Stack: array, table, sort */
    lua_gettable(lua, -2);       /* Stack: array, table, table.sort */
    lua_pushvalue(lua, -3);      /* Stack: array, table, table.sort, array */
    lua_getglobal(lua, "__redis__compare_helper");
    /* Stack: array, table, table.sort, array, __redis__compare_helper */
    lua_call(lua, 2, 0);
  }
  /* Stack: array (sorted), table */
  lua_pop(lua, 1); /* Stack: array (sorted) */
}

Expected<std::string> LuaState::luaCreateFunction(lua_State* lua,
                                                  const std::string& body) {