Spack package for parafeed

[preshanth]

I have created a package inside the spack directory. If one were to copy parafeed dir into your local spack repo you should be able to install parafeed in your environment by simply saying

spack env create parafeed
spack env activate parafeed
spack add parafeed
spack concretize
spack install 

[sanbee]

Need more precise information for testing.

"If one were to copy parafeed dir into your local spack repo...": Where in the spack repo does this spack directory needs to be copied?

I presume this is way of installing is for testing for now. Ultimately spack install parafeed should be sufficient.

[preshanth]

spack repo create local_repo local_repo # The second is the namespace
spack add local_repo
cp -r spack/parafeed local_repo/spack-repo/local_repo/packages/
spack install parafeed

That should allow you to test the install. Eventually when its in spack you will install with spack install parafeed it should come from the central repo then.

[preshanth]

If you refer to the Fixing spack install artifacts the last two commits are passing. I have put in a conditional argument that spack building only occurs when spack related files are altered. This is ready to be merged now.

[sanbee]

I tested it with a bare-bones spack env and the parafeed installation in spack worked. So, merging this PR.