dev-libs/olm: add python bindings

dev-libs/olm/olm-3.1.4.ebuild

@@ -1,9 +1,11 @@
 # Copyright 1999-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
-EAPI=6
+EAPI=7
 
-inherit cmake-utils
+PYTHON_COMPAT=( python2_7 python3_{6,7,8} )
+
+inherit cmake-utils python-r1
 
 DESCRIPTION="Implementation of the olm and megolm cryptographic ratchets"
 HOMEPAGE="https://gitlab.matrix.org/matrix-org/olm"
@@ -12,4 +14,41 @@ SRC_URI="https://gitlab.matrix.org/matrix-org/${PN}/-/archive/${PV}/${P}.tar.bz2
 LICENSE="Apache2.0"
 SLOT="0"
 KEYWORDS="~amd64 ~x86"
-IUSE=""
+IUSE="+python"
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+RDEPEND="
+	python? (
+		${PYTHON_DEPS}
+		dev-python/cffi[${PYTHON_USEDEP}]
+		dev-python/future[${PYTHON_USEDEP}]
+		dev-python/typing[${PYTHON_USEDEP}]
+	)"
+
+compile_pybinding() {
+	cd python
+	"${EPYTHON}" setup.py build || die
+	python_optimize
+}
+
+src_compile() {
+	default
+
+	if use python; then
+		python_foreach_impl compile_pybinding
+	fi
+}
+
+install_pybinding() {
+	cd python
+	"${EPYTHON}" setup.py install --root="${D}" --prefix="${EPREFIX}/usr/" || die
+	python_optimize
+}
+
+src_install() {
+	default
+
+	if use python; then
+		python_foreach_impl install_pybinding
+	fi
+}