# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

PYTHON_COMPAT=( python2_7 python3_{6,7} )
PYTHON_REQ_USE="threads(+)"

inherit distutils-r1 toolchain-funcs elisp-common

MY_PN="Cython"
MY_P="${MY_PN}-${PV/_/}"

DESCRIPTION="A Python to C compiler"
HOMEPAGE="https://cython.org https://pypi.org/project/Cython/"
SRC_URI="mirror://pypi/${MY_PN:0:1}/${MY_PN}/${MY_P}.tar.gz"

LICENSE="Apache-2.0"
SLOT="0"
KEYWORDS="*"

IUSE="doc emacs test"
RESTRICT="!test? ( test )"

RDEPEND="
	emacs? ( >=app-editors/emacs-23.1:* )
"
DEPEND="${RDEPEND}
	dev-python/setuptools[${PYTHON_USEDEP}]
	doc? ( dev-python/sphinx[${PYTHON_USEDEP}] )
	test? ( dev-python/numpy[${PYTHON_USEDEP}] )"

SITEFILE=50cython-gentoo.el
S="${WORKDIR}/${MY_PN}-${PV%_*}"

python_prepare_all() {
	# tests behavior that is illegal in Python 3.7+
	# https://github.com/cython/cython/issues/2454
	sed -i -e '/with_outer_raising/,/return/d' tests/run/generators_py.py || die

	distutils-r1_python_prepare_all
}

python_compile() {
	if ! python_is_python3; then
		local CFLAGS="${CFLAGS} -fno-strict-aliasing"
		local CXXFLAGS="${CXXFLAGS} -fno-strict-aliasing"
	fi

	# Python gets confused when it is in sys.path before build.
	local -x PYTHONPATH=

	distutils-r1_python_compile
}

python_compile_all() {
	use emacs && elisp-compile Tools/cython-mode.el

	use doc && emake -C docs html
}

python_test() {
	tc-export CC
	# https://github.com/cython/cython/issues/1911
	local -x CFLAGS="${CFLAGS} -fno-strict-overflow"
	"${PYTHON}" runtests.py -vv --work-dir "${BUILD_DIR}"/tests \
		|| die "Tests fail with ${EPYTHON}"
}

python_install_all() {
	local DOCS=( CHANGES.rst README.rst ToDo.txt USAGE.txt )
	use doc && local HTML_DOCS=( docs/build/html/. )
	distutils-r1_python_install_all

	if use emacs; then
		elisp-install ${PN} Tools/cython-mode.*
		elisp-site-file-install "${FILESDIR}/${SITEFILE}"
	fi
}

pkg_postinst() {
	use emacs && elisp-site-regen
}

pkg_postrm() {
	use emacs && elisp-site-regen
}