net-libs/tox: New use flag dht-node.

This commit introduces the use flag dht-node. This flag
controls the building of the program /usr/bin/DHT_bootstrap.
This flag is turned off by default. This helps mitigate
the impact of Bug 684470.

Signed-off-by: Josiah Mullins <JoMull01@protonmail.com>
Bug: https://bugs.gentoo.org/684470
Package-Manager: Portage-2.3.62, Repoman-2.3.11
Closes: https://github.com/gentoo/gentoo/pull/12009
Signed-off-by: Michał Górny <mgorny@gentoo.org>

net-libs/tox/metadata.xml

@@ -11,6 +11,7 @@
 	</maintainer>
 	<use>
 		<flag name="av">Adds support for audio and video.</flag>
+		<flag name="dht-node">Enables DHT Bootstrap Node.</flag> 
 		<flag name="no-log">Log level: 0 (no debug info logged)</flag>
 		<flag name="log-error">Log level: 1</flag>
 		<flag name="log-warn">Log level: 2</flag>

net-libs/tox/tox-0.2.9-r1.ebuild

@@ -0,0 +1,110 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit cmake-utils systemd user
+
+MY_P="c-toxcore-${PV}"
+DESCRIPTION="Encrypted P2P, messaging, and audio/video calling platform"
+HOMEPAGE="https://tox.chat"
+SRC_URI="https://github.com/TokTok/c-toxcore/archive/v${PV}.tar.gz -> ${MY_P}.tar.gz"
+
+LICENSE="GPL-3+"
+SLOT="0/0.2"
+KEYWORDS="~amd64 ~arm ~x86"
+IUSE="+av daemon dht-node ipv6 log-debug +log-error log-info log-trace log-warn static-libs test"
+
+REQUIRED_USE="?? ( log-debug log-error log-info log-trace log-warn )
+		daemon? ( dht-node )"
+
+RDEPEND="
+	av? ( media-libs/libvpx:=
+		media-libs/opus )
+	daemon? ( dev-libs/libconfig )
+	>=dev-libs/libsodium-0.6.1:=[asm,urandom,-minimal]"
+BDEPEND="virtual/pkgconfig"
+
+S="${WORKDIR}/${MY_P}"
+
+src_prepare() {
+	cmake-utils_src_prepare
+	#remove faulty tests
+	for testname in bootstrap lan_discovery save_compatibility tcp_relay tox_many_tcp; do
+		sed -i -e "/^auto_test(${testname})$/d" CMakeLists.txt || die
+	done
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DAUTOTEST=$(usex test)
+		-DBOOTSTRAP_DAEMON=$(usex daemon)
+		-DBUILD_MISC_TESTS=$(usex test)
+		-DBUILD_TOXAV=$(usex av)
+		-DDHT_BOOTSTRAP=$(usex dht-node)
+		-DENABLE_SHARED=ON
+		-DENABLE_STATIC=$(usex static-libs)
+		-DMUST_BUILD_TOXAV=$(usex av))
+	if use test; then
+		mycmakeargs+=(
+			-DBUILD_AV_TEST=$(usex av)
+			-DTEST_TIMEOUT_SECONDS=120
+			-DUSE_IPV6=$(usex ipv6))
+	else
+		mycmakeargs+=(
+			-DBUILD_AV_TEST=OFF
+			-DUSE_IPV6=OFF)
+	fi
+
+	if use log-trace; then
+		mycmakeargs+=(-DMIN_LOGGER_LEVEL="TRACE")
+	elif use log-debug; then
+		mycmakeargs+=(-DMIN_LOGGER_LEVEL="DEBUG")
+	elif use log-info; then
+		mycmakeargs+=(-DMIN_LOGGER_LEVEL="INFO")
+	elif use log-warn; then
+		mycmakeargs+=(-DMIN_LOGGER_LEVEL="WARNING")
+	elif use log-error; then
+		mycmakeargs+=(-DMIN_LOGGER_LEVEL="ERROR")
+	else
+		mycmakeargs+=(-DMIN_LOGGER_LEVEL="")
+		einfo "Logging disabled"
+	fi
+
+	cmake-utils_src_configure
+}
+
+src_install() {
+	cmake-utils_src_install
+
+	if use daemon; then
+		newinitd "${FILESDIR}"/initd tox-dht-daemon
+		newconfd "${FILESDIR}"/confd tox-dht-daemon
+		insinto /etc
+		doins "${FILESDIR}"/tox-bootstrapd.conf
+		systemd_dounit "${FILESDIR}"/tox-bootstrapd.service
+	fi
+}
+
+pkg_postinst() {
+	if use dht-node; then
+		ewarn "There is currently an unresolved issue with tox"
+		ewarn "DHT Bootstrap node that causes the program to be"
+		ewarn "built with a null library reference. This"
+		ewarn "causes an infinite loop for certain revdep-rebuild"
+		ewarn "commands. If you aren't running a node, please"
+		ewarn "consider disabling the DHT-node use flag."
+	fi
+	if use daemon; then
+		enewgroup tox
+		enewuser tox -1 -1 -1 tox
+		if [[ -f ${EROOT}/var/lib/tox-dht-bootstrap/key ]]; then
+			ewarn "Backwards compatability with the bootstrap daemon might have been"
+			ewarn "broken a while ago. To resolve this issue, REMOVE the following files:"
+			ewarn "    ${EROOT}/var/lib/tox-dht-bootstrap/key"
+			ewarn "    ${EROOT}/etc/tox-bootstrapd.conf"
+			ewarn "    ${EROOT}/run/tox-dht-bootstrap/tox-dht-bootstrap.pid"
+			ewarn "Then just re-emerge net-libs/tox"
+		fi
+	fi
+}