[bug#56169] [PATCH] gnu: Add cambalache.

[Liliana Marie Prikler]

Am Donnerstag, dem 30.06.2022 um 11:16 +0200 schrieb Daniel Meißner:
> Liliana Marie Prikler writes:
> 
> > Am Mittwoch, dem 29.06.2022 um 09:21 +0200 schrieb Daniel Meißner:
> > > Hi Liliana,
> > > 
> > > Thanks for packaging Cambalache :-) I have applied your patch to
> > > my
> > > local Guix checkout and it builds fine.  However, running
> > > 
> > >     ./pre-inst-env guix shell cambalache -- cambalace
> > > 
> > > Cambalache starts up but I am unable to add any widgets.  There
> > > are
> > > some error messages written to stderr that complain about a
> > > missing
> > > typelib: CambalachePrivate.  I see that you wrap the programme
> > > but
> > > you did not include the path to the CambalachePrivate typelib. 
> > > So
> > > maybe this is causing the problem?
> > Thanks, I'll update the patch accordingly soon™.
> 
> I did a first try by wrapping the programme as follows:
> 
> --8<---------------cut here---------------start------------->8---
> (wrap-program prog
>               `("GI_TYPELIB_PATH"
>                 suffix
>                 (,(getenv "GI_TYPELIB_PATH")
>                  ,(string-append #$output "/lib/girepository-1.0"))))
> --8<---------------cut here---------------end--------------->8---
> 
> Now, with this, cambalache finds the typelib but complains on two
> other things:
> 
> 1. There's another typelib called Adw which is not found
Should be resolved by adding libadwaita to the inputs.
> 2. gi.repository.GLib.GError: gdk-pixbuf-error-quark: Format der
> Bilddatei unbekannt (3)
A broken image?  Any supporting hints like file paths?

> Now 2. is more severe since it occurs when I add for example a
> GtkApplicationWindow to the project.  This widget does not show up
> and I cannot add other widgets to the application window.
> 
> > > Additionally, the icons in the headerbar are missing.  This seems
> > > to
> > > be related to:
> > > 
> > > Missing dependency for Xournal++
> > > https://issues.guix.gnu.org/51968
> > For this class of bugs, I'd always try to include glib in the guix
> > shell and check if the issue persists.  We don't build icon caches
> > per package, so the only way to fix that is to get XDG_DATA_DIRS
> > into your profile.
> 
> Thanks for the hint.  IIUC, the inclusion of glib into the profile
> triggers a hook for generating the appropiate XDG_DATA_DIRS env
> variable into the profile, right?  Is the reason why icon caches are
> not per-package so that different icon-themes can work?  Sorry, this
> is taking an orthogonal direction.
It's a practical limitation.  There is a single file, that would leat
to a very large number of conflicts, most of them harmless but still
time-consuming to resolve.  Thus we leave it to a profile hook to
actually generate the icon themes.   This hook runs regardless, but
XDG_DATA_DIRS won't be set by it.

Cheers