Running a subset of regression tests, or a single test, is
currently rather annoying, as you cannot simply run 'pytest':
you need to override PYTHONPATH and specify several environment
variables.
Instead, move the whole boilerplate to a wrapper script that
allows running pytest with any command line options. Use it in
Makefiles as well, so that it doesn't go out of sync with CI.
Graphene had some paths to internal files generated at compile time and
hardcoded into the output binary, which disallowed e.g. moving the
Graphene directory after compilation.
Don Porter