# Copyright 1999-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

inherit systemd tmpfiles

MY_PV="${PV/_p/-P}"
MY_PV="${MY_PV/_rc/rc}"

DESCRIPTION="Berkeley Internet Name Domain - Name Server"
HOMEPAGE="https://www.isc.org/software/bind"
SRC_URI="https://downloads.isc.org/isc/bind9/${PV}/${P}.tar.xz"
S="${WORKDIR}/${PN}-${MY_PV}"

LICENSE="MPL-2.0"
SLOT="0"
KEYWORDS="~alpha amd64 ~arm ~arm64 ~hppa ~loong ~mips ppc ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux"
IUSE="+caps dnsrps dnstap doc doh fixed-rrset idn jemalloc geoip gssapi lmdb selinux static-libs test xml"
RESTRICT="!test? ( test )"

DEPEND="
	acct-group/named
	acct-user/named
	dev-libs/json-c:=
	>=dev-libs/libuv-1.37.0:=
	sys-libs/zlib:=
	dev-libs/openssl:=[-bindist(-)]
	caps? ( >=sys-libs/libcap-2.1.0 )
	dnstap? (
		dev-libs/fstrm
		dev-libs/protobuf-c
	)
	doh? ( net-libs/nghttp2:= )
	geoip? ( dev-libs/libmaxminddb )
	gssapi? ( virtual/krb5 )
	idn? ( net-dns/libidn2 )
	jemalloc? ( dev-libs/jemalloc:= )
	lmdb? ( dev-db/lmdb )
	xml? ( dev-libs/libxml2 )
"
RDEPEND="
	${DEPEND}
	selinux? ( sec-policy/selinux-bind )
	sys-process/psmisc
	!<net-dns/bind-tools-9.18.0
"
# sphinx required for man-page and html creation
BDEPEND="
	dev-lang/perl
	virtual/pkgconfig
	doc? ( dev-python/sphinx )
	test? (
		dev-util/cmocka
	)
"

src_prepare() {
	default

	# Don't clobber our toolchain defaults
	sed -i -e '/FORTIFY_SOURCE=/d' configure || die

	# Test is (notoriously) slow/resource intensive
	sed -i -e 's:ISC_TEST_MAIN:int main(void) { exit(77); }:' tests/isc/netmgr_test.c || die
}

src_configure() {
	local myeconfargs=(
		--prefix="${EPREFIX}"/usr
		--sysconfdir="${EPREFIX}"/etc/bind
		--localstatedir="${EPREFIX}"/var
		--enable-full-report
		--without-readline
		--with-openssl="${ESYSROOT}"/usr
		--with-json-c
		--with-zlib
		$(use_enable caps linux-caps)
		$(use_enable dnsrps)
		$(use_enable dnstap)
		$(use_enable doh)
		$(use_with doh libnghttp2)
		$(use_enable fixed-rrset)
		$(use_enable static-libs static)
		$(use_enable geoip)
		$(use_with test cmocka)
		$(use_with geoip maxminddb)
		$(use_with gssapi)
		$(use_with idn libidn2)
		$(use_with jemalloc)
		$(use_with lmdb)
		$(use_with xml libxml2)
	)

	econf "${myeconfargs[@]}"
}

src_test() {
	# system tests ('emake test') require network configuration for IPs etc
	# so we run the unit tests instead.
	CI=1 emake unit V=1

	# libtest is an internal test helper library, it has no tests,
	# so suppress the QA warning.
	rm tests/libtest/test-suite.log || die
}

src_install() {
	default

	dodoc CHANGES README.md

	if use doc; then
		docinto misc
		dodoc -r doc/misc/

		docinto html
		dodoc -r doc/arm/

		docinto dnssec-guide
		dodoc -r doc/dnssec-guide/

		docinto contrib
		dodoc contrib/scripts/nanny.pl
	fi

	insinto /etc/bind
	newins "${FILESDIR}"/named.conf-r8 named.conf
	newins "${FILESDIR}"/named.conf.auth named.conf.auth

	newinitd "${FILESDIR}"/named.init-r15 named
	newconfd "${FILESDIR}"/named.confd-r8 named

	newenvd "${FILESDIR}"/10bind.env 10bind

	if ! use static-libs ; then
		find "${ED}"/usr/lib* -name '*.la' -delete || die
	fi

	#
	# /var/bind
	#
	# These need to remain for now because CONFIG_PROTECT won't
	# save them and we shipped configs for years containing references
	# to them.
	#
	# ftp://ftp.rs.internic.net/domain/named.cache:
	insinto /var/bind
	newins "${FILESDIR}"/named.cache-r4 named.cache
	# bug #450406
	dosym named.cache /var/bind/root.cache
	#
	insinto /var/bind/pri
	newins "${FILESDIR}"/localhost.zone-r3 localhost.zone

	dosym -r /var/bind/pri /etc/bind/pri
	dosym -r /var/bind/sec /etc/bind/sec
	dosym -r /var/bind/dyn /etc/bind/dyn
	keepdir /var/bind/{pri,sec,dyn} /var/log/named

	fowners root:named /{etc,var}/bind /var/log/named /var/bind/{sec,pri,dyn}
	fowners root:named /etc/bind/{bind.keys,named.conf,named.conf.auth}
	fperms 0640 /etc/bind/{bind.keys,named.conf,named.conf.auth}
	fperms 0750 /etc/bind /var/bind/pri
	fperms 0770 /var/log/named /var/bind/{,sec,dyn}

	systemd_newunit "${FILESDIR}/named.service-r2" named.service
	dotmpfiles "${FILESDIR}"/named.conf
	exeinto /usr/libexec
	doexe "${FILESDIR}/generate-rndc-key.sh"
}

pkg_postinst() {
	tmpfiles_process named.conf

	if [[ ! -f '/etc/bind/rndc.key' && ! -f '/etc/bind/rndc.conf' ]]; then
		einfo "Generating rndc.key"
		/usr/sbin/rndc-confgen -a
		chown root:named /etc/bind/rndc.key || die
		chmod 0640 /etc/bind/rndc.key || die
	fi

	einfo
	einfo "You can edit /etc/conf.d/named to customize named settings"
	einfo

	einfo "If you'd like to run bind in a chroot AND this is a new"
	einfo "install OR your bind doesn't already run in a chroot:"
	einfo "1) Uncomment and set the CHROOT variable in /etc/conf.d/named."
	einfo "2) Run \`emerge --config '=${CATEGORY}/${PF}'\`"
	einfo

	CHROOT=$(source /etc/conf.d/named 2>/dev/null; echo ${CHROOT})
	if [[ -n ${CHROOT} ]]; then
		elog "NOTE: As of net-dns/bind-9.4.3_p5-r1 the chroot part of the init-script got some major changes!"
		elog "To enable the old behaviour (without using mount) uncomment the"
		elog "CHROOT_NOMOUNT option in your /etc/conf.d/named config."
		elog "If you decide to use the new/default method, ensure to make backup"
		elog "first and merge your existing configs/zones to /etc/bind and"
		elog "/var/bind because bind will now mount the needed directories into"
		elog "the chroot dir."
	fi

	# show only when upgrading to 9.18
	if [[ -n "${REPLACING_VERSIONS}" ]] && ver_test "${REPLACING_VERSIONS}" -lt 9.18; then
		elog "As this is a major bind version upgrade, please read:"
		elog "   https://kb.isc.org/docs/changes-to-be-aware-of-when-moving-from-bind-916-to-918"
		elog "for differences in functionality."
		elog ""
		ewarn "In particular, please note that bind-9.18 does not need a root hints file anymore"
		ewarn "and we only ship with one as a stop-gap. If your current configuration specifies a"
		ewarn "root hints file - usually called named.cache - bind will not start as it will not be able"
		ewarn "to find the specified file. Best practice is to delete the offending lines that"
		ewarn "reference named.cache file from your configuration."
	fi
}

pkg_config() {
	CHROOT=$(source /etc/conf.d/named; echo ${CHROOT})
	CHROOT_NOMOUNT=$(source /etc/conf.d/named; echo ${CHROOT_NOMOUNT})
	CHROOT_GEOIP=$(source /etc/conf.d/named; echo ${CHROOT_GEOIP})

	if [[ -z "${CHROOT}" ]]; then
		eerror "This config script is designed to automate setting up"
		eerror "a chrooted bind/named. To do so, please first uncomment"
		eerror "and set the CHROOT variable in '/etc/conf.d/named'."
		die "Unset CHROOT"
	fi

	if [[ -d "${CHROOT}" ]]; then
		ewarn "NOTE: As of net-dns/bind-9.4.3_p5-r1 the chroot part of the init-script got some major changes!"
		ewarn "To enable the old behaviour (without using mount) uncomment the"
		ewarn "CHROOT_NOMOUNT option in your /etc/conf.d/named config."
		ewarn
		ewarn "${CHROOT} already exists... some things might become overridden"
		ewarn "press CTRL+C if you don't want to continue"
		sleep 10
	fi

	echo; einfo "Setting up the chroot directory..."

	mkdir -m 0750 -p ${CHROOT} || die
	mkdir -m 0755 -p ${CHROOT}/{dev,etc,var/log,run} || die
	mkdir -m 0750 -p ${CHROOT}/etc/bind || die
	mkdir -m 0770 -p ${CHROOT}/var/{bind,log/named} ${CHROOT}/run/named/ || die

	chown root:named \
		${CHROOT} \
		${CHROOT}/var/{bind,log/named} \
		${CHROOT}/run/named/ \
		${CHROOT}/etc/bind \
		|| die

	mknod ${CHROOT}/dev/null c 1 3 || die
	chmod 0666 ${CHROOT}/dev/null || die

	mknod ${CHROOT}/dev/zero c 1 5 || die
	chmod 0666 ${CHROOT}/dev/zero || die

	if [[ "${CHROOT_NOMOUNT:-0}" -ne 0 ]]; then
		cp -a /etc/bind ${CHROOT}/etc/ || die
		cp -a /var/bind ${CHROOT}/var/ || die
	fi

	if [[ "${CHROOT_GEOIP:-0}" -eq 1 ]]; then
		if use geoip; then
			mkdir -m 0755 -p ${CHROOT}/usr/share/GeoIP || die
		elif use geoip2; then
			mkdir -m 0755 -p ${CHROOT}/usr/share/GeoIP2 || die
		fi
	fi

	elog "You may need to add the following line to your syslog-ng.conf:"
	elog "source jail { unix-stream(\"${CHROOT}/dev/log\"); };"
}