No coverage report data on windows-latest workflows

[stephane-caron]

Describe the bug
Since the release of tox-gh-actions 3.0.0 the qpsolvers project has been experiencing Windows CI issues qpsolvers/qpsolvers#141. The symptom is:

py37-windows: commands[7]> coverage report --include=\"qpsolvers/*\"
  No data to report.

Which makes the CI fail. Version-pinning tox-gh-actions to 2.12.0 removes the symptom, as done e.g. in this job.

To Reproduce

• GitHub Actions configuration: test.yml
• tox and tox-gh-actions configuration: tox.ini
• Link to the GitHub Actions job if a repository is public: for instance this one

Expected behavior

Successful coverage report generation.

Additional context

• The issue only happens only on windows-latest images (ubuntu-latest and macos-latest images work fine).
• The issue started happening two days ago with this job, which is a minor change following a successful build.
• Previously this job worked fine. It installed tox-4.0.16 and tox_gh_actions-2.12.0.
• Version-pinning tox-gh-actions to 2.12.0 removes the symptom, as done e.g. in this job. It installs tox-3.28.0 and tox_gh_actions-2.12.0.

[stephane-caron]

Actually the cure seems to come from tox being downgraded from >=4 to 3.28.0. This job was successful by version-pinning tox to 3.28.0, with no version pin on tox-gh-actions (that is, it installed tox==3.28.0 and tox_gh_actions-3.0.0).

Closing this issue in favor of tox-dev/tox#2778.

[ymyzk]

@stephane-caron, FYI, we now need to install a different version of tox-gh-actions depending on the tox version.

• tox-gh-actions v2 must be used with tox v3
• tox-gh-actions v3 must be used with tox v4

Please see https://github.com/ymyzk/tox-gh-actions#versions-and-compatibility for more details.