gpi_make still trying to import site-package packages as node libraries

[borupdaniel]

During a build, if the --ignore-system-libs flag isn't included, gpi_make is still looking two directories upstream and finding lots of python packages in site-packages. These are then included as include_dirs for the build. I don't know that this is a problem (the build still works fine), but the messages displayed are a little confusing.

The library search setup feels a bit hacky in general, so I think this could be part of a clean-up there. Can we come up with a good list of behaviors we want out of gpi_make?

[borupdaniel]

To me the best behaviors would be (will update this as any discussion below recommends):

• [x] Give the user final say on what directories to include via their .gpirc file, with an option to ignore it.
• [ ] Default to including any folders in ~/gpi
• [ ] Default to including any node libraries in site-packages. We discussed a few ways to do this but haven't implemented any yet. I favor looking for packages called gpi_ since this is pretty lightweight and already works for gpi_core
• [ ] (?) Default to including other site-packages libs to the include path. Allow this to be overridden with a flag (same one as below, or should we add another?).
• [ ] Default to including /usr/include and /usr/lib, which can be overriden with an ignore flag.
• [ ] Provide clear display messages about what's being added and why, to aid in debugging any build failures.

It might help to be a bit smarter than "two directories up" so that there's more flexibility on where to call gpi_make. This could be pretty easy: something like "go up directory levels until you run into a gpi folder, in which case add everything, or a site-packages folder, in which case add anything starting with gpi_".

In addition, the site-package linking happens by default because that folder is now included in the GPI_LIBRARY_PATH variable. The --ignore-gpirc flag is a bit misleading - it actually ignores that path variable even if it's not set in .gpirc at all.

[aganders3]

I think the "two directories up" code is only really useful for compiling a single PyMOD file anyway, so maybe we can disable it when --all is specified? I think that would fix part of this at least for the automated builds.

[borupdaniel]

That seems like a good approach to me.