`--sanity-check-only` runs commands in installation dir

[ocaisa]

This leads to problems if the commands have output files since these will get placed in the installation

[boegel]

That's just because the sanity check is always run from the installation directory, this is not specific to --sanity-check-only:

easybuild-framework/easybuild/framework/easyblock.py

Lines 3438 to 3440 in c10f1e0

	# change to install directory (better environment for running tests)
	if os.path.isdir(self.installdir):
	change_dir(self.installdir)

We can consider changing that, I can see how this isn't the best possible way of running the sanity check, but doing so without breaking sanity checks won't be trivial...

[branfosj]

I know we have some easyconfigs where we (ab)use the sanity check as it simplifies how we write a post install command. During the sanity check all the relevant paths are set I think this was in a bioinformatics package, where it is used to download the required databases.