Generate Haskell bindings for GObject Introspection capable libraries.

The most recent versions of the generated bindings are available from hackage. To install, start by making sure that you have a recent (1.24 or later) version of cabal-install:

$ cabal install cabal-install
$ cabal --version
cabal-install version 1.24.0.0
compiled using version 1.24.0.0 of the Cabal library 

Then install the bindings you need. For instance, for the gtk+ bindings you can do:

$ cabal install gi-gtk

(Note: you may need to run this command twice, due to a bug in cabal).

That's it! Here is an example "Hello World" program:

{-# LANGUAGE OverloadedStrings, OverloadedLabels #-}

import qualified GI.Gtk as Gtk
import Data.GI.Base

main :: IO ()
main = do
  Gtk.init Nothing

  win <- new Gtk.Window [ #title := "Hi there" ]

  on win #destroy Gtk.mainQuit

  button <- new Gtk.Button [ #label := "Click me" ]

  on button #clicked (set button [ #sensitive := False,
                                   #label := "Thanks for clicking me" ])

  #add win button

  #showAll win

  Gtk.main

This program uses the new OverloadedLabels extension in GHC 8.0, so make sure you have a recent enough version of GHC installed. To run this program, copy it to a file (hello.hs, say), and then

$ ghc -o hello hello.hs
$ ./hello

For a more involved example, see for instance this WebKit example. Further documentation can be found in the Wiki.

It should be rather easy to generate bindings to any library with gobject-introspection support, see the examples in the bindings folder. Pull requests appreciated!