This is just a build log, which was leaked dozen years ago. But there is no actual files leaks, even of L2NPC.exe.
The only files, which were leaked - network stack, IOCP queues, and few headers with main classes, and WinMain.cpp. But even those leaks are like from some beta or alpha code.
Some of them were shared many years ago. Here is re-share from 2019 on Chineese code oceans (with gazillions of other leaks). Original share was removed or expired, at least I can't find it any more there.
This is only smal part of leaks, which are available in public. But if you will search more on Chineese web-sites, you will find this log, which was published here in 1st post. Exactly the same.