[Enhancement]: ignore/skip files and directories when scanning

[cgoldberg]

Overview

I saw the ability to select a path in the [[tool.refurb.amend]] config section. That is very helpful, but it would be great if I could also ignore/skip directories using similar glob syntax as .gitignore.

It would also be nice to be able to respect .gitignore and not process any files I have ignored.

---

Thanks for the great tool!

Proposal

This could be a new config and command-line option:

skip = ["test_*.py", "foo/"]

or

refurb --skip='foo/' .

Another idea is to do this via a .refurbignore file.

[cgoldberg]

I just looked at the code, and this probably isn't possible due to how mypy's build works.

[dosisod]

MyPy does have an exclude option, but this only affects discoverability of files. Still, if you don't want/need to scan test directories for example, this would be a great option.

If an excluded file is imported elsewhere, I imagine MyPy will still scan it. There is also a exclude_gitignore option in MyPy 1.16+, which should probably be the default.

What we could do is:

1. Enable git ignore by exclusion by default, add flag to re-enable it if needed
2. Add support for a global exclude list
3. Add support for appending exclude list via amend sections
4. Convert git style globs into regex that can be passed to MyPy