I managed to build Blender (Windows, Mac and Linux) with Github Actions.
This should make sharing experimental builds much easier for developers.
I had to make a few small changes. It builds with a custom script (build.py in the root folder) and the links to git submodules and svn repos are hard-coded.
Aside from that, there’s not too much to explain, really.
I haven’t figured out yet how to build it with CUDA, though.
Not sure if it makes sense to try to get this onto master. Opinions?