Per-file skipfile option missing

[furtib]

Describe the task

Currently, the skipfile handling is either missing or broken in the per_file rule.

Scope

• Implement the skipfile option for the per-file rule

Definition of Done

Can use a skipfile with the per-file rule.

[furtib]

Well, I finally got around to this.
It seems like Bazel doesn't have a regex module we could use.
There are external libraries: https://github.com/jvolkman/re.bzl (!vibecoded!), https://github.com/magnetde/starlark-re.
It seems like this issue will be harder than I thought. We might need to develop our own regex module.
CodeChecker analyses the argument gotten under --file even if that file is in the skiplist. Also, if it skipped that file, there would be no output file, so Bazel would think the job failed.

[furtib]

During a meeting, we also mentioned that we could just create a job for every file and create empty result files for skipped actions.
I'm not in favour of this, but this is definitely a much easier, and, more importantly, stable solution.