Add CMake linter cmake-lint

[carlsmedstad]

Add support for the CMake linter cmake-lint provided by https://github.com/cheshirekow/cmake_format.

A bit unsure about the naming due to the conflict with the other linter for CMake.

Resolves #3396.

[offa]

Since the current linter is unmaintained, wouldn't it make sense to replace it with the new one?

[carlsmedstad]

The old linter has been forked and now lives in cmake-lint/cmake-lint. Development is far from active, but I asked if the project was still maintained and the answer was yes.

So I don't think it's fair to replace it really.

[offa]

Ah, thank you. I only knew the original repo.

[hsanson]

Thanks, looks good. Just missing tests for the linter itself. Can you add one similar to test/linter/test_ruby.vader? It tests if the correct default command is returned and if the options are properly set if configured.

[carlsmedstad]

Added the test and also wrapped the executable in ale#Escape() as I noticed that was the case for most other linters.

[hsanson]

Thanks for the contribution.

[hsanson]

@carlsmedstad @offa does this new linter replaces the current one available in ALE:

• https://github.com/richq/cmake-lint

Wondering if we should consider removing it. I see from that repo that there has not been any activity in the last 5 years. But that alone is not indiciation that the linter is not being used.

[carlsmedstad]

See my comment above for my opinion about that:

The old linter has been forked and now lives in cmake-lint/cmake-lint. Development is far from active, but I asked if the project was still maintained and the answer was cmake-lint/cmake-lint#8 (comment).

So I don't think it's fair to replace it really.

I think we should update the URL to point to the new repository at least (https://github.com/cmake-lint/cmake-lint).