Handling lists the typical way shells might do (e.g. with globs for files)

[gfarrell]

When working with files, I'd like to be able to do something like mycli -i ./**/*.hs and have all the files populate [FilePath]. MVE:

data MyCLI = MyCLI { files :: [FilePath], output :: FilePath } 
    deriving (Generic) 
    deriving anyclass (ParseRecord)

main :: IO ()
main = getRecord "file-based CLI" >>= print

Running this as cabal run mycli -- --files ./**/*.hs --output ./output.txt fails to parse with "InvalidArgument".

I can see that, from the docs, you expect lists to be handled as --files x.hs --files y.hs etc., but with file globbing that's not going to happen.