Run previously failed tests first

[Marenz]

• CI: Run previously failed tests first
• CI: Use uv backend for nox

[daniel-zullo-frequenz]

I think matrix.nox-session will be interpreted as a string rather than being evaluated as a variable without ${{ }}, thus the condition will be always false

Suggested change

	if: always() && matrix.nox-session == 'pytest_min'
	if: always() && ${{ matrix.nox-session == "pytest_min" }}

[Marenz]

No, it's actually working, I tested this PR extensively :)

[daniel-zullo-frequenz]

ok, I see it works.
I read the docs too and that confirms it too, though there are exceptions for cases that this won't work.

When you use expressions in an if conditional, you can, optionally, omit the ${{ }} expression syntax because GitHub Actions automatically evaluates the if conditional as an expression. However, this exception does not apply everywhere.

You must always use the ${{ }} expression syntax or escape with '', "", or () when the expression starts with !, since ! is reserved notation in YAML format. For example:

I've also seen in line 66 it is written if: ${{ matrix.nox-session == 'pytest_min' }} and ideally we should be consistent on how these statements are written.
IMO it feels safer to always use ${{ }}, and I agree it doesn't look good

[llucax]

I would prefer if repos CI don't start to diverge, so I would definitely push for moving this to a common place like repo-config, or even better, https://github.com/frequenz-floss/gh-action-nox, and start pushing to use these GH actions more.

As for uv, I still wonder if pre-releases won't be an issue to start using it as the default. But maybe we have to suck it up and adapt to whatever uv wants, as it is orders of magnitude better than pip.

[Marenz]

pushing to use these GH actions more.

What you mean "more" I looked and there isn't a single repo using them :P
Could you make one so we have a nice example of how it's used?

[llucax]

Internal repo, but there is an usage example in the action repo itself.