Add pre-commit.ci config

[jaagut]

Summary

Adds config for enabling https://pre-commit.ci/
This CI or rather GitHub-App runs the pre-commit hooks, pushes automatic fixes and regularly updates to the latest pre-commit hook versions

Proposed changes

Related issues

Checklist

• Run just build
• Write documentation
• Test on your machine
• Test on the robot
• Create issues for future work
• Triage this PR and label it

[jaagut]

Should be merged after #739

[Flova]

So this is like a dependabot for pre commit?

[jaagut]

pre-commit CI is now disabled. I will enable it again, once this PR is merged and it does not fail anymore.

[jaagut]

So this is like a dependabot for pre commit?

Yes, it updates the pre-commit hooks like dependabot updates the GitHub Action versions.

But crucially, it also runs the the pre-commit hooks in a CI, similar to .github/workflows/pre-commit.yml AND it automatically pushes auto-fixing commits. So no need to manually update the branch after locally running pixi run format.

They (https://pre-commit.ci/) claim it is faster than most CIs including GitHub Actions for this task due to targeted caching.

[jaagut]

Unfortunately, it seems like pre-commit.ci does not support cppcheck.
We are currently using https://github.com/pocc/pre-commit-hooks (no updates in 5 years) for clang-format and cppcheck.

For using clang-format, there is a different "officially" supported hook: https://github.com/pre-commit/mirrors-clang-format

This leaves us with four options:

• Use our GitHub action as before, gain no autofixes and updates
• Use a hybrid of two pre-commit-config files, one running in pre-commit.ci with the above mentioned pros and an additional GitHub action only running the cppcheck hook.
• Use https://pre-commit.ci/lite.html as a GitHub action and install and run cppcheck. By this, we gain autofix commits, but don't get automatic hook version updates.
• Use https://pre-commit.ci/ with all its benefits, but lose on cppcheck.

What do you think?