Compatibility issue with spack 0.20

[tpadioleau]

Using spack 0.20, the local py-distributed package seems to be outdated, I have an issue with the deleted py-contextvars dependency of this package.

I would propose that we make a backup of the current state that works with spack 0.19 in a dedicated branch and a new branch 0.20 without our custom recipes of python packages.

[tpadioleau]

I guess we can have a discussion about the packages that are already in the main spack repository. Some of them are necessary for DEISA. I also found that sionlib is already in the main repo.

[jbigot]

Then I'll remove sionlib, no need to keep it here

[jbigot]

py-distributed here is the receipe for a fork required for Deisa

[tpadioleau]

Our version seems more evolved than the spack 0.20.0 one. Maybe we should contribute to the main repo version ?

[jbigot]

our version of what?

[jbigot]

but, yes, upstreaming most receipes would be great

[tpadioleau]

our version of what?

sionlib

[GueroudjiAmal]

There are other needed packages missing in spack 0.20 in addition to the py-contextvars the py-ordereddict, py-singledispatch, py-futures are needed for py-dask

[GueroudjiAmal]

Adding those packages install correctly pdiplugin-deisa and dependencies (I just took them an older version of spack packages (https://github.com/spack/spack/blob/v0.16.0/var/spack/repos/builtin/packages/)

[tpadioleau]

That may do the trick but I wonder if it is reasonable on the mid/long term.

[GueroudjiAmal]

Actually yeah, at some point it may be interesting to pull request deisa-external tasks feature to dask distributed this may we use a maintained spack package of dask and dependencies ...