I am excited to see that pyproject.toml is coming, but I'm a little worried that this horrible hack won't work any more. My app has 3 different bundles (tests to run in CI, test version with a major breaking-change feature flag enabled, regular legacy app) derived from the same codebase.

I'm assuming that for the first few releases that support pyproject.toml, I'll be able to continue doing this, but at some point I expect that it will break. I am amenable to rewriting this code or restructuring the project a bit to do this, but it'd be great to figure this out in advance of the next release.

Is the likely solution just to stick with my split py2app_setup.py / pyproject.toml until py2app's pyproject.toml support adds multiple bundles?