Alternative to fatJar - modular solution?

[Mike Hearn]

It's worth noting that before he worked on Loom, Ron Pressler wrote
Capsule, which is a kind of uber-fat-jar system that embeds JARs within
JARs:

https://github.com/puniverse/capsule

The website is offline now but it had a lot of features, including the
ability to extract shared libraries from the 'capsule'. It worked by
extracting files to a cache directory and running them from there. So, Ron
might have some insight to offer here, if asked.