[arch-haskell] Example PKGBUILD

[Don Stewart]

Here's an example of what new PKGBUILDs look like if we rely on the
"provides" semantics.

You see how this works even if say, haskell-containers is moved out of the ghc set?
Our deps will continue to be correct.

We should never have relied on cabal2arch to fake "provides" in the first place :)

The key now will be ensuring that GHC's provides list is 100% accurate.

    # Contributor: Arch Haskell Team <arch-haskell at haskell.org>
    # Package generated by cabal2arch 0.7
    # Note: we list all package dependencies.
    # Your package tool should understand 'provides' syntax
    #
    pkgname=xmonad
    pkgrel=1
    pkgver=0.9
    pkgdesc="A tiling window manager"
    url="http://hackage.haskell.org/package/xmonad"
    license=('custom:BSD3')
    arch=('i686' 'x86_64')
    makedepends=()
    depends=('gmp' 'ghc' 'haskell-cabal' 'haskell-x11>=1.4.6.1' 'haskell-containers' 'haskell-directory' 'haskell-filepath' 'haskell-mtl' 'haskell-process' 'haskell-unix')
    options=('strip')
    source=(http://hackage.haskell.org/packages/archive/xmonad/0.9/xmonad-0.9.tar.gz)
    install=xmonad.install
    md5sums=('5ec4ec7b6ab1ec841ceca07184a28ba7')
    build() {
        cd ${srcdir}/xmonad-0.9
        runhaskell Setup configure --prefix=/usr --docdir=/usr/share/doc/${pkgname} || return 1
        runhaskell Setup build                   || return 1
        runhaskell Setup haddock || return 1
        runhaskell Setup register   --gen-script || return 1
        runhaskell Setup unregister --gen-script || return 1
        install -D -m744 register.sh   ${pkgdir}/usr/share/haskell/$pkgname/register.sh
        install    -m744 unregister.sh ${pkgdir}/usr/share/haskell/$pkgname/unregister.sh
        install -d -m755 $pkgdir/usr/share/doc/ghc/libraries
        ln -s /usr/share/doc/${pkgname}/html ${pkgdir}/usr/share/doc/ghc/libraries/xmonad
        runhaskell Setup copy --destdir=${pkgdir} || return 1
        install -D -m644 LICENSE ${pkgdir}/usr/share/licenses/$pkgname/LICENSE || return 1
        rm -f ${pkgdir}/usr/share/doc/${pkgname}/LICENSE
    }