I know you can run you project like this:
UE4\Engine\Binaries\Win64\UE4Editor.exe ProjectName -run=DerivedDataCache -fill
in order to fill DDC. This command will delete any existing DDC and rebuild everything.
I’ve left it working over the weekend and when I came back this morning, I forgot I set it as run configuration, ran it and whole DDC was deleted.
Is there some kind of flag I can set that won’t delete DDC first, but only try to add what is missing?
That way when I want to rebuild it completely I can delete DDC folder manually, but if I accidentally run it twice, it won’t wipe everything (and it takes over 24h for my project to rebuild).