R3D spackage (#10164)
R3D spackage (#10164)

* r3d spackage

* address Adam's review comments

* fix flake8: too many blank lines

iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack,LLNL/spack,iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack,iulian787/spack