Add options to include/exclude paths

[willfaught]

Your feature request related to a problem? Please describe

I use https://entgo.io. It generates an /ent directory, and expects you to put your schema definitions in /ent/schema. It then generates code in /ent/foo, /ent/bar, etc. I have no control over the generated code, so I don't want to see linter errors for it. I don't see a way to exclude /ent/**, but include /ent/schema.

Describe the solution you'd like

run --exclude-path '^ent/.*$' --include-path '^ent/schema/.*$'

Describe alternatives you've considered

--exclude-dirs only works on directory names, which won't work if you want to skip some directories and exclude others with the same name.

Additional context

No response

[boring-cyborg]

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[ldez]

Hello,

you can use exclude-files: https://golangci-lint.run/usage/false-positives/#exclude-or-skip

[willfaught]

I don't see how exclude-files can exclude /ent/**, but include /ent/schema. Adjusting my example above, run --exclude-files '^ent/.*$' will exclude ent/schema.

[denis-tingaikin]

I see a few options for how we can manage it.

1. Add a new flag that will exclude things from the exluded_path, as suggested by @willfaught. Here we can simply re-use approach from the golangci-linter/issues config, where we have exclude and include options.
2. Allow using regexp in exclude-path with negative lookahead. E.g., use this lib: https://github.com/dlclark/regexp2
3. Currently, it can be workarounded without chages via list all paths in --exclude-path  except '^ent/schema/.*$'. For example,  --exclude-path ent/folder1, ent/folder2/.*, ent/folder3/.* and etc 😀

@ldez Thoughts?