main/py3-atomicwrites: drop py2

Closes !173

main/py3-atomicwrites/APKBUILD

 # Contributor: Jakub Jirutka <jakub@jirutka.cz>
 # Maintainer: Jakub Jirutka <jakub@jirutka.cz>
-pkgname=py-atomicwrites
+pkgname=py3-atomicwrites
 _pkgname=python-atomicwrites
 pkgver=1.3.0
-pkgrel=0
-pkgdesc="Powerful Python library for atomic file writes"
+pkgrel=1
+pkgdesc="Powerful Python3 library for atomic file writes"
 url="https://github.com/untitaker/python-atomicwrites"
 arch="noarch"
 license="MIT"
-makedepends="python2-dev python3-dev py-setuptools"
+depends="python3"
+makedepends="py3-setuptools"
 options="!check"  # requires pytest which depends on this aport (cyclic dep)
-subpackages="py2-${pkgname#py-}:_py2 py3-${pkgname#py-}:_py3"
 source="https://github.com/untitaker/python-atomicwrites/archive/$pkgver/$_pkgname-$pkgver.tar.gz"
 builddir="$srcdir/$_pkgname-$pkgver"
 
+replaces="py-atomicwrites" # Backwards compatibility
+provides="py-atomicwrites=$pkgver-r$pkgrel" # Backwards compatibility
+
 build() {
 	cd "$builddir"
-	python2 setup.py build
 	python3 setup.py build
 }
 
 package() {
-	mkdir -p "$pkgdir"
-}
-
-_py2() {
-	_py python2
-}
-
-_py3() {
-	_py python3
-}
-
-_py() {
-	local python="$1"
-	pkgdesc="$pkgdesc (for $python)"
-	depends="$depends $python"
-	install_if="$pkgname=$pkgver-r$pkgrel $python"
-
 	cd "$builddir"
-	$python setup.py install --prefix=/usr --root="$subpkgdir"
+	python3 setup.py install --prefix=/usr --root="$pkgdir"
 }
 
 sha512sums="7a257286ba35d6f0db3772ef9666283f29c36719fe35eeb1cb9c36341f0f6a0d7c316d236927ef031f2b8ac6c245320481f51c59e0e1ccf2cbea49065a13d474  python-atomicwrites-1.3.0.tar.gz"