# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

EAPI=5
PYTHON_COMPAT=( python2_7 )
inherit cmake-utils perl-module linux-info python-single-r1

DESCRIPTION="High-level language bindings for libnetfilter_queue"
HOMEPAGE="https://github.com/chifflier/nfqueue-bindings"
SRC_URI="https://github.com/chifflier/nfqueue-bindings/archive/nfqueue-bindings-0.5.tar.gz"

KEYWORDS="~x86 ~amd64"
SLOT="0"
LICENSE="GPL-3"
IUSE="perl python examples"
REQUIRED_USE="|| ( perl python )"

DEPEND="python? (
		dev-python/dpkt[${PYTHON_USEDEP}]
		${PYTHON_DEPS}
	)
	perl? ( dev-lang/perl )
	net-libs/libnetfilter_queue
	dev-lang/swig"

S=${WORKDIR}/${PN}-${P}

pkg_setup() {
	use python && python-single-r1_pkg_setup
	# At least one of Python or Perl must be selected
	use python || useq perl || die "At least one supported language must be selected."
	# Check kernel configuration for NFQUEUE
	if linux_config_exists; then
		ebegin "Checking NETFILTER_NETLINK_QUEUE support"
		linux_chkconfig_present NETFILTER_NETLINK_QUEUE
		eend $? || \
			eerror 'Netfilter NFQUEUE over NFNETLINK interface support not found!'
		ebegin "Checking NETFILTER_XT_TARGET_NFQUEUE support"
		linux_chkconfig_present NETFILTER_XT_TARGET_NFQUEUE
		eend $? || \
			eerror '"NFQUEUE" target Support not found!'
	fi
}

src_prepare() {
	# Fix Perl destination directory
	perl_set_version
	sed -i "s|\${LIB_INSTALL_DIR}/perl\${PERL_VERSION}/|${VENDOR_ARCH}|" perl/CMakeLists.txt || die
	sed -i "s|\${LIB_INSTALL_DIR}/python\${PYTHON_VERSION}/dist-packages/|$(python_get_sitedir)|" python/CMakeLists.txt || die
	# Disable Perl/Python from USE flags
	use perl || sed -i 's|ADD_SUBDIRECTORY(perl)||' CMakeLists.txt || die
	use python || sed -i 's|ADD_SUBDIRECTORY(python)||' CMakeLists.txt || die
}

src_install() {
	emake DESTDIR="${D}" install PREFIX=/usr || die
	docinto examples
	use examples && dodoc examples/*
}