guarding against regressions

[molpopgen]

The hope is that demes is widely-used. If so, we need to be careful about introducing regressions. R allows "reverse dependency checking", which takes ages but is common practice for widely-used tools like Rcpp: https://rdrr.io/cran/devtools/man/revdep.html.

AFAIK, Python doesn't support this, in part because PyPi is not considered the one true source of packages.

We could use GitHub actions to check commits against a set of tools, though.

We can be semi-accommodating. For example:

• If a Python tool provides a binary Linux wheel OR compiles quickly (like moments)
• AND it provides a tests/test_demes_stuff.py that is compatible with pytest

Then we should be able to have a set of Ubuntu actions that test each tool in a virtualenv, which is presumably needed to guard against inter-package dependency conflicts stemming from requirements.txt files being all over the place.

[jeromekelleher]

Good idea.

[molpopgen]

Good idea.

Forces me to get fwdpy11 wheels auto-deployed upon release now!