How can I allow only lowercase filenames including extensions and disallow all other filenames?

[romanstetsyk]

ls:
  .*: lowercase

As far as I can tell, ls-lint treats everything after the first dot as an extension. For example, test.SUBEXT.ts will pass the validation because test is lowercase. However, we have many files with different combinations of extensions and sub-extensions, so listing them all is not feasible.
How can I limit all filenames, sub-extensions, and extensions to lowercase only? Is it achievable using wildcards? Any tips would be appreciated!

Examples:
Allow only lowercase extensions, e.g. .jpg but disallow .JPG, .JpG, etc.
Allow only lowercase sub-extensions, e.g. .model.ts but disallow .MODEL.ts, .model.TS, etc.

[loeffel-io]

there is currently no support for linting the value of extensions and subextensions

but maybe you do something like this:

ls:
    .*: exists:0 # do not allow any other extension and specify only the allowed extensions bellow
    .jpg: ... 
    .ts: ... 

[romanstetsyk]

Thanks for the suggestion! It works for files without sub-extensions. Unfortunately, I must include .*.* and .*.*.* to catch more cases of wrong filenames.

[loeffel-io]

#121 could make this even easier