Exclude all except one subfolder for Rubocop - ruby

Question

Let's say we have a folder called bin and it includes another subfolder bin/scripts besides other folders and top-level files.
We are looking to scan only the bin/scripts/**/* files and ignore everything else in the bin folder.
This pattern bellow excludes everything in that folder
AllCops:
TargetRubyVersion: 3.1.2
NewCops: enable
Exclude:
- "bin/**/*"

Answer 1

Use ERB to Template Your Exclusions
This is covered by the RuboCop documentation on including/excluding files when used in conjunction with the section on pre-processing using ERB. There might be a more elegant way to do this, but using ERB to add excluded items based on an inverted regular expression using Enumerable#grep_v on a Dir#glob just seems easiest to me.
This was tested with Ruby 3.1.2 and RuboCop v1.30.1, and "just works." Your mileage may vary with other versions or approaches.
AllCops:
TargetRubyVersion: 3.1.2
NewCops: enable
Exclude:
<% Dir.glob('bin/**/*').grep_v(%r{bin/scripts/}).each do |path| %>
- <%= path %>
<% end %>
With the template above in .rubocop.yml and a tree structure of:
.
├── bin
│   ├── bar.rb
│   ├── baz
│   │   └── quux.rb
│   └── scripts
│   └── wuuble
│   └── zub.rb
└── lib
└── foo.rb
RuboCop only checks:
lib/foo.rb
bin/scripts/wuuble/zub.rb