Usage of subdirectories to store multiple packages in a single repo

[GunnarFarneback]

@Gregstrq

Also, are subdirectories supported by all Julia 1.x version, or is there some lower bound? Are subdirectories supported for the LTS version of Julia?

All Julia 1.x versions can use registered packages that live in subdirectories but complete support (Pkg.dev and similar) requires Julia 1.5 or higher.

You can find some discussion related to this in Feature request: Store multiple registered packages in a single Git repository · Issue #1251 · JuliaLang/Pkg.jl · GitHub.