repo: Patch coverage with subprocess

[pdgendt]

Coverage subprocess has been removed in pytest-cov 7.0. To migrate the patch option has to be added.
See https://pytest-cov.readthedocs.io/en/latest/subprocess-support.html

@marc-hb the coverage plummeted to 48% for no apparent reason because, in CI, we simply install the latest versions of all tools.
As it took quite some time to figure this out, I intend to come back to locking dependency versions in CI. But with a better proposal, stay tuned.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.43%. Comparing base (1ffe41c) to head (0444d56).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #840       +/-   ##
===========================================
+ Coverage   47.86%   84.43%   +36.57%     
===========================================
  Files          11       11               
  Lines        3366     3366               
===========================================
+ Hits         1611     2842     +1231     
+ Misses       1755      524     -1231     

see 9 files with indirect coverage changes

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[marc-hb]

As it took quite some time to figure this out, I intend to come back to locking dependency versions in CI. But with a better proposal, stay tuned.

I lost track of the previous discussion sorry (assuming I ever was on top of it...EDIT: #802?) but why can't this simply be solved with TWO requirements.txt files? A "very hardcoded" one used by CI and releases (and anyone else who wants it) and more "relaxed", flexible and "traditional" one with just minimum versions? The latter can be used by developers to avoid virtualenv and to spot regressions like you just did. I did exactly that (2 requirements-*.txt files) once for a tricky sphinx build and it worked really well.

As it took quite some time to figure this out,...

If that's any consolation, someone would have had to spend this time eventually anyway and it most likely would have still been you :-/ However I agree it would be better to be in control of the timing!