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# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

inherit autotools flag-o-matic systemd linux-info tmpfiles

DESCRIPTION="Robust and highly flexible tunneling application compatible with many OSes"
HOMEPAGE="https://openvpn.net/"

if [[ ${PV} == "9999" ]]; then
	EGIT_REPO_URI="https://github.com/OpenVPN/${PN}.git"
	EGIT_SUBMODULES=(-cmocka)

	inherit git-r3
else
	SRC_URI="https://build.openvpn.net/downloads/releases/${P}.tar.gz"
	KEYWORDS="~alpha amd64 arm arm64 ~hppa ~ia64 ~mips ppc ppc64 ~riscv ~s390 ~sparc x86 ~amd64-linux ~x86-linux"
fi

LICENSE="GPL-2"
SLOT="0"

IUSE="down-root examples inotify iproute2 +lz4 +lzo mbedtls +openssl"
IUSE+=" pam pkcs11 +plugins selinux systemd test userland_BSD"

RESTRICT="!test? ( test )"
REQUIRED_USE="
	^^ ( openssl mbedtls )
	pkcs11? ( !mbedtls )
	!plugins? ( !pam !down-root )
	inotify? ( plugins )
"

CDEPEND="
	kernel_linux? (
		iproute2? ( sys-apps/iproute2[-minimal] )
	)
	lz4? ( app-arch/lz4 )
	lzo? ( >=dev-libs/lzo-1.07 )
	mbedtls? ( net-libs/mbedtls:= )
	openssl? ( >=dev-libs/openssl-0.9.8:0= )
	pam? ( sys-libs/pam )
	pkcs11? ( >=dev-libs/pkcs11-helper-1.11 )
	systemd? ( sys-apps/systemd )
"

BDEPEND="virtual/pkgconfig"

DEPEND="${CDEPEND}
	test? ( dev-util/cmocka )
"
RDEPEND="${CDEPEND}
	acct-group/openvpn
	acct-user/openvpn
	selinux? ( sec-policy/selinux-openvpn )
"

if [[ ${PV} = "9999" ]]; then
	BDEPEND+=" dev-python/docutils"
fi

PATCHES=(
	"${FILESDIR}"/openvpn-2.5.0-auth-pam-missing-header.patch
	"${FILESDIR}"/openvpn-2.5.2-detect-python-rst2man.patch
)

pkg_setup() {
	local CONFIG_CHECK="~TUN"
	linux-info_pkg_setup
}

src_prepare() {
	default
	eautoreconf
}

src_configure() {
	local -a myeconfargs

	if ! use mbedtls; then
		myeconfargs+=(
			$(use_enable pkcs11)
		)
	fi
	myeconfargs+=(
		$(use_enable inotify async-push)
		--with-crypto-library=$(usex mbedtls mbedtls openssl)
		$(use_enable lz4)
		$(use_enable lzo)
		$(use_enable plugins)
		$(use_enable iproute2)
		$(use_enable pam plugin-auth-pam)
		$(use_enable down-root plugin-down-root)
		$(use_enable systemd)
	)
	SYSTEMD_UNIT_DIR=$(systemd_get_systemunitdir) \
		TMPFILES_DIR="/usr/lib/tmpfiles.d" \
		IPROUTE=$(usex iproute2 '/bin/ip' '') \
		econf "${myeconfargs[@]}"
}

src_test() {
	local -x RUN_SUDO=false

	make check || die "top-level tests failed"
	pushd tests/unit_tests &>/dev/null || die
	make check || die "unit tests failed"
	popd &>/dev/null || die
}

src_install() {
	default

	find "${ED}/usr" -name '*.la' -delete || die

	# install documentation
	dodoc AUTHORS ChangeLog PORTS README README.IPv6

	# Install some helper scripts
	keepdir /etc/openvpn
	exeinto /etc/openvpn
	doexe "${FILESDIR}/up.sh"
	doexe "${FILESDIR}/down.sh"

	# Install the init script and config file
	newinitd "${FILESDIR}/${PN}-2.1.init" openvpn
	newconfd "${FILESDIR}/${PN}-2.1.conf" openvpn

	# install examples, controlled by the respective useflag
	if use examples ; then
		# (is the below comment relevant anymore?)
		## dodoc does not supportly support directory traversal, #15193
		docinto examples
		dodoc -r sample contrib
	fi

	# https://bugs.gentoo.org/755680#c3
	doman doc/openvpn.8
}

pkg_postinst() {
	tmpfiles_process openvpn.conf

	if use x64-macos; then
		elog "You might want to install tuntaposx for TAP interface support:"
		elog "http://tuntaposx.sourceforge.net"
	fi

	if systemd_is_booted ||  has_version sys-apps/systemd; then
		elog "In order to use OpenVPN with systemd please use the correct systemd service file."
		elog  ""
		elog "server:"
		elog ""
		elog "- Place your server configuration file in /etc/openvpn/server"
		elog "- Use the openvpn-server@.service like so"
		elog "systemctl start openvpn-server@{Server-config}"
		elog ""
		elog "client:"
		elog ""
		elog "- Place your client configuration file in /etc/openvpn/client"
		elog "- Use the openvpn-client@.service like so:"
		elog "systemctl start openvpn-client@{Client-config}"
	else
		elog "The openvpn init script expects to find the configuration file"
		elog "openvpn.conf in /etc/openvpn along with any extra files it may need."
		elog ""
		elog "To create more VPNs, simply create a new .conf file for it and"
		elog "then create a symlink to the openvpn init script from a link called"
		elog "openvpn.newconfname - like so"
		elog "	 cd /etc/openvpn"
		elog "	 ${EDITOR##*/} foo.conf"
		elog "	 cd /etc/init.d"
		elog "	 ln -s openvpn openvpn.foo"
		elog ""
		elog "You can then treat openvpn.foo as any other service, so you can"
		elog "stop one vpn and start another if you need to."
	fi

	if grep -Eq "^[ \t]*(up|down)[ \t].*" "${ROOT}/etc/openvpn"/*.conf 2>/dev/null ; then
		ewarn ""
		ewarn "WARNING: If you use the remote keyword then you are deemed to be"
		ewarn "a client by our init script and as such we force up,down scripts."
		ewarn "These scripts call /etc/openvpn/\$SVCNAME-{up,down}.sh where you"
		ewarn "can move your scripts to."
	fi

	if use plugins ; then
		einfo ""
		einfo "plugins have been installed into /usr/$(get_libdir)/${PN}/plugins"
	fi
}