[oll-user] Submodules revisited

[Urs L. <ul...@op...>]

Hi all,

having worked on some other things lately I have the impression that the
repo organization is good as it is.
On our organization account https://github.com/openlilylib
there are now quite a lot of repos, and I assume this number could even
increase over time.

All of them have a workable history: Some actually have their original
history preserved, with some I have got as much out of the combined
repos as possible (i.e. back to the point where files have been moved
between folders, because that is where git filter-branch fails), some
are actually new.
_All_ old history is present in the oll-archive repository. This isn't
there to be used anymore but only in case someone has to inspect some
ancient history ...

Now that we have this set of parallel repositories I'm ready to give the
idea of submodules a fresh consideration.
AFAICS this would mean creating a new 'super-repo' and pulling the other
ones in it. This would also have the benefit that there was a place for
general issues relating to the project as a whole.

But as I don't have any experience and still feel insecure I'd like to
ask you for feedback:
- How would I start to set up a submodule approach?
- How would one fetch changes from all modules?
- What do I have to do if I commit updates to a submodule:
  - push to the remote repo?
  - push to the super-repo?
  - push to the remote repo and update the super-repo?

Any guidance gladly accepted.

Best
Urs