[petsc-dev] --download and spack

[Jed Brown]

"Smith, Barry F." <bsmith at mcs.anl.gov> writes:

>     I have no problem on the installation page mentioning using spack to install PETSc; but we shouldn't pretend that it is easy and will always work. 
>
>     I fear if we just say 
>
>      spack install petsc
>
>      we'll get emails that expect us to debug the person's set up of
>      spack, which we absolutely do not want to be in that game. 

Agreed that we don't want to be in the game of debugging spack, but I'm
also not wild about the duplicated work of maintaining all the
--download packages, especially on architectures that are not in our
nightlies.