provide separate source tar files for modules
Simone @sbna is working with packaging our catalyst module with spack. It is very useful to have the the catalyst adaptor reside outside of the main OpenFOAM source tree and thus be able to combine one particular installation of OpenFOAM with various ParaView and Catalyst flavours (mpi, mesa, gpu rendering, etc). For this to package smoothly in spack, EasyBuilder etc, there should be a downloadable tar file to be used when packaging.
I think that Modules-v1806.tar.gz with the identical contents of the modules/ tree (avalanche, catalyst, cfmesh), would be quite useful. I think that is OK to bundle the three together and have the packager decide which sub-directory is relevant.