CondaPkg dependency for Extension package

[wsmoses]

I'm hoping to add a python dependency to an extension package, and it wasn't clear to me how this should be done.

Any tips?

x/ref EnzymeAD/Reactant.jl#354 EnzymeAD/Reactant.jl#407

cc @mofeing @avik-pal

[mofeing]

i guess that just adding CondaPkg.toml suffices? https://github.com/JuliaPy/PythonPlot.jl/blob/main/CondaPkg.toml

my hope is that this works when PythonCall/CondaPkg is a weak dep

[wsmoses]

yeah the problem is we don't want to add the condapkg.toml on Reactant itself, but only when the PythonCall extension is loaded....and that....I have no idea how to do

[mofeing]

i guess that it'll still work? like CondaPkg.toml will only be checked when CondaPkg is loaded (or precompiled?)