Bug#1009883: dh_haskell_install_ghc_registration: does not support directories

[Scott Talbert]

On Thu, 21 Apr 2022, Felix Lechner wrote:

> As for this bug, I was aware that I broke the directory feature but,
> like you, was also not sure right away about how to handle it
> properly. The directory feature for package registrations is described
> in the documentation. [1]
>
> Kind regards
> Felix Lechner
>
> [1] https://downloads.haskell.org/cabal/Cabal-3.0.0.0/doc/users-guide/installing-packages.html#cmdoption-setup-register-gen-pkg-config

Actually, as best as I can tell, the old code only supported files as 
well, so I don't think this was a regression.  It looks as though the 
correct approach might be to just install each file that's in the 
directory.  If you don't have time to look into it, I might take a stab at 
it.

Thanks,
Scott