Current best practises on dealing with optional dependencies

[ChrisRackauckas]

@Luapulu

Or do I make little glue packages like FooHDF5.jl, FooDiffEq.jl and FooPlots.jl which glue my package and these large dependencies together? This doesn’t force large dependencies on the package but still allows for full functionality. It comes at the cost of a proliferation of glue packages though.

Most of these have small Base packages you’re supposed to hook into so you avoid the dependencies. RecipesBase.jl, SciMLBase.jl, etc.