bug#62672: Unexpected interaction between gobject-introspection and grafts

[John Kehayias via Bug reports for GNU Guix <bug-guix@gnu.org>]

Hi Collin and Josselin,

I haven't fully read this thread but wanted to chime in with work I did
but never finalized to upstream here. In short, I did get taffybar to
build and run if I recall. There was a lot of fussing with versions,
some Haskell packages that were broken/undergoing some breaking changes
at the time...I don't remember the details, sorry.

https://gitlab.com/podiki/guix-pod/-/blob/main/taffybar.scm

Checking now taffybar does not build (some dependent package failing,
looks like needs an input change) but ghc-gi-gdk does. This should be
the bulk of the work you need beyond polishing (linting, license checks,
all that). It is a lot of packages, many are the autogenerated
haskell-gi packages as I'm sure you are familiar.

On the gobject-introspection front, I do remember needing some tinkering
there for cairo, and ended up using what was suggested here:
https://issues.guix.gnu.org/49122#4

I haven't used Taffybar much since I went back to my lisp land (StumpWM)
but hopefully this is helpful. Some Haskell experts can chime in with
other details or polishing once it builds.

Let me know if you need help parsing this early and rough packaging I
did, though I think it shouldn't take much to get it to build again
(famous last words, I know).

John