APKBUILD examples:Multiple Subpackages

A more complex APKBUILD with -doc, -dev, and python subpackages:
Contents of libxml2/APKBUILD
# Contributor: Carlo Landmeter <clandmeter at gmail>
# Maintainer: Carlo Landmeter <clandmeter at gmail>
pkgname=libxml2
pkgver=2.7.8
pkgrel=0
pkgdesc="XML parsing library, version 2"
url="http://www.xmlsoft.org/"
arch="all"
license="MIT"
depends=
depends_dev="zlib-dev python-dev"
makedepends="zlib-dev python-dev"
subpackages="$pkgname-doc $pkgname-dev py-$pkgname:py $pkgname-utils"
source="ftp://ftp.xmlsoft.org/${pkgname}/${pkgname}-${pkgver}.tar.gz
	largefile64.patch"

options="!strip"

_builddir="$srcdir/$pkgname-$pkgver"
prepare() {
	cd "$_builddir"
	for _i in "$srcdir"/*.patch; do
		patch -p1 -i "$_i"
	done
}

build() {
	cd "$_builddir"
	./configure --prefix=/usr \
		--sysconfdir=/etc \
		--mandir=/usr/share/man \
		--infodir=/usr/share/info 
	make
}

package() {
	cd "$_builddir"
	make -j1 DESTDIR="$pkgdir" install
	install -Dm644 COPYING "$pkgdir"/usr/share/licenses/$pkgname/COPYING
}

py() {
	cd "$_builddir"
	pkgdesc="$pkgname python bindings"
	install -d "$subpkgdir"/usr/lib
	mv "$pkgdir"/usr/lib/python* "$subpkgdir"/usr/lib/
}

utils() {
	pkgdesc="XML utilities"
	replaces="libxml2"
	mkdir -p "$subpkgdir"/usr
	mv "$pkgdir"/usr/bin "$subpkgdir"/usr/
}

md5sums="8127a65e8c3b08856093099b52599c86  libxml2-2.7.8.tar.gz
5ad4915665608ebfa5b89f7908467a72  largefile64.patch"