Since Daniel Wagner's patch[1] from 11 July 2012, gtk/gtk.cabal in the gtk2hs repository declares the package name to be gtk3. This is a fine approach to take for differentiating the Gtk3 bindings from their Gtk2 counterparts but the implementation needs to be finished.
In addition to editing gtk.cabal, the patch also adds gtk.cabal-0 and
gtk.cabal-3. The naming of these files is quite mysterious (why does the
Gtk 2 cabal file end in "-0"?) and it's completely unclear how to
convince cabal-install to build bindings for a given Gtk version short
of copying one of these files over gtk.cabal. At very least, we need to
add some notes to INSTALL describing how to build both the Gtk3 and
Gtk2 bindings.
Really, it would be better if things were laid out in such a way that
the desired workflow was apparent to a moderately experienced Haskeller.
One way to accomplish this would be,
* remove gtk/gtk.cabal
* move gtk/gtk.cabal-0 to gtk2/gtk.cabal and gtk/gtk.cabal-3 to
gtk3/gtk3.cabal
* possibly rename gtk/ to gtk-common/ to suggest to the user that this
directory contains no package of its own
* add hs-source-dirs definitions pointing to gtk/ to both files
* move Gtk2/3 specific files in gtk-common/ to the appropriate
version-specific directory
* Of course, update installation documentation in INSTALL
Thoughts?
Cheers,
- Ben
[1]
https://github.com/bgamari/gtk2hs/commit/adf06373654d32b5b5838b813807faeb8bb3819b
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