mkosi should allow subimages to have subimages

[g-arjones]

I was surprised to find out that mkosi.images folders within subimages are ignored. I'm willing to submit a PR if the maintainers belive this is a reasonable feature to have.

[DaanDeMeyer]

Can you add a proper use case to the issue?

[g-arjones]

I'm trying to put together a "layered" build using mkosi (similar to yocto). Subimages are kept in separate git repositores and added to the default image as git submodules.

The goal is to only have to explicitly add the layers that the default image directly depends on.

Does that make sense?

[DaanDeMeyer]

That's still extremely vague. Please write down a detailed concrete example of what you want to do. Note that the entirety of yocto is architected around layers. The distribution package managers mkosi is built around are not and I suspect you'll run into that difference very quickly trying to make this work.