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# Copyright 1999-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

PYTHON_COMPAT=( python3_{8..10} )
inherit cmake flag-o-matic python-any-r1 systemd tmpfiles

DESCRIPTION="Clam Anti-Virus Scanner"
HOMEPAGE="https://www.clamav.net/"
SRC_URI="https://www.clamav.net/downloads/production/${P}.tar.gz"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~ppc ~ppc64 ~riscv ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~sparc-solaris ~x86-solaris"
IUSE="doc clamonacc +clamapp libclamav-only milter rar selinux systemd test"

REQUIRED_USE="libclamav-only? ( !clamonacc !clamapp !milter )
	clamonacc? ( clamapp )
	milter? ( clamapp )
	test? ( !libclamav-only )"

RESTRICT="!test? ( test )"

# Require acct-{user,group}/clamav at build time so that we can set
# the permissions on /var/lib/clamav in src_install rather than in
# pkg_postinst; calling "chown" on the live filesystem scares me.
CDEPEND="acct-group/clamav
	acct-user/clamav
	dev-libs/libltdl
	dev-libs/libmspack
	dev-libs/json-c:=
	dev-libs/libpcre2
	>=sys-libs/zlib-1.2.2:=
	app-arch/bzip2
	clamapp? ( sys-libs/ncurses:= net-misc/curl )
	elibc_musl? ( sys-libs/fts-standalone )
	virtual/libiconv
	!libclamav-only? ( net-misc/curl )
	dev-libs/openssl:=
	milter? ( mail-filter/libmilter:= )
	dev-libs/libxml2
	rar? ( app-arch/unrar )
	test? ( dev-python/pytest )"
# TODO: there is no way to use this with the new build system instead of the bundled one
#	dev-libs/tomsfastmath
BDEPEND="virtual/pkgconfig
	doc? ( app-doc/doxygen )
	test? (
		${PYTHON_DEPS}
		$(python_gen_any_dep 'dev-python/pytest[${PYTHON_USEDEP}]')
	)"
DEPEND="${CDEPEND}
	test? ( dev-libs/check )"
RDEPEND="${CDEPEND}
	selinux? ( sec-policy/selinux-clamav )"

python_check_deps() {
	has_version -b "dev-python/pytest[${PYTHON_USEDEP}]"
}

pkg_setup() {
	use test && python-any-r1_pkg_setup
}

src_configure() {
	use elibc_musl && append-ldflags -lfts
	use ppc64 && append-flags -mminimal-toc

	local mycmakeargs=(
		-DDATABASE_DIRECTORY="${EPREFIX}"/var/lib/clamav
		-DAPP_CONFIG_DIRECTORY="${EPREFIX}"/etc/clamav
		-DENABLE_EXPERIMENTAL=OFF
		-DENABLE_JSON_SHARED=ON
		-DENABLE_APP=$(usex clamapp ON OFF)
		-DENABLE_MILTER=$(usex milter ON OFF)
		-DENABLE_CLAMONACC=$(usex clamonacc ON OFF)
		-DCLAMAV_USER="clamav"
		-DCLAMAV_GROUP="clamav"
		-DBYTECODE_RUNTIME=interpreter
		-DOPTIMIZE=ON
		-DENABLE_EXTERNAL_MSPACK=ON
		-DENABLE_MAN_PAGES=ON
		-DENABLE_DOXYGEN=$(usex doc)
		-DENABLE_UNRAR=$(usex rar ON OFF)
		-DENABLE_TESTS=$(usex test ON OFF)
		# Used to enable some more tests but doesn't behave well in
		# sandbox necessarily(?) + needs certain debug symbols present
		# in e.g. glibc.
		-DCMAKE_DISABLE_FIND_PACKAGE_Valgrind=ON
		-DENABLE_STATIC_LIB=OFF
		-DENABLE_SHARED_LIB=ON
		-DENABLE_SYSTEMD=$(usex systemd ON OFF)
	)
	cmake_src_configure
}

src_install() {
	cmake_src_install

	# init scripts
	newinitd "${FILESDIR}/clamd.initd" clamd
	newinitd "${FILESDIR}/freshclam.initd" freshclam
	use clamonacc && \
		newinitd "${FILESDIR}/clamonacc.initd" clamonacc
	use milter && \
		newinitd "${FILESDIR}/clamav-milter.initd" clamav-milter

	rm -rf "${ED}"/var/lib/clamav || die

	if ! use libclamav-only ; then
		if use systemd ; then
			# The tmpfiles entry is behind USE=systemd because the
			# upstream OpenRC service files should (and do) ensure that
			# the directories they need exist and have the correct
			# permissions without the help of opentmpfiles. There are
			# years-old root exploits in opentmpfiles, the design is
			# fundamentally flawed, and the maintainer is not up to
			# the task of fixing it.
			dotmpfiles "${FILESDIR}/tmpfiles.d/clamav.conf"
			systemd_newunit "${FILESDIR}/clamd_at.service-0.104.0" "clamd@.service"
			systemd_dounit "${FILESDIR}/clamd.service"
			systemd_newunit "${FILESDIR}/freshclamd.service-r1" \
							"freshclamd.service"
		fi

		if use clamapp ; then
			# Modify /etc/{clamd,freshclam}.conf to be usable out of the box
			sed -e "s:^\(Example\):\# \1:" \
				-e "s/^#\(PidFile .*\)/\1/" \
				-e "s/^#\(LocalSocket .*\)/\1/" \
				-e "s/^#\(User .*\)/\1/" \
				-e "s:^\#\(LogFile\) .*:\1 ${EPREFIX}/var/log/clamav/clamd.log:" \
				-e "s:^\#\(LogTime\).*:\1 yes:" \
				-e "s/^#\(DatabaseDirectory .*\)/\1/" \
				"${ED}"/etc/clamav/clamd.conf.sample > \
				"${ED}"/etc/clamav/clamd.conf || die

			sed -e "s:^\(Example\):\# \1:" \
				-e "s/^#\(PidFile .*\)/\1/" \
				-e "s/^#\(DatabaseOwner .*\)/\1/" \
				-e "s:^\#\(UpdateLogFile\) .*:\1 ${EPREFIX}/var/log/clamav/freshclam.log:" \
				-e "s:^\#\(NotifyClamd\).*:\1 ${EPREFIX}/etc/clamav/clamd.conf:" \
				-e "s:^\#\(ScriptedUpdates\).*:\1 yes:" \
				-e "s/^#\(DatabaseDirectory .*\)/\1/" \
				"${ED}"/etc/clamav/freshclam.conf.sample > \
				"${ED}"/etc/clamav/freshclam.conf || die

			if use milter ; then
				# Note: only keep the "unix" ClamdSocket and MilterSocket!
				sed -e "s:^\(Example\):\# \1:" \
					-e "s/^#\(PidFile .*\)/\1/" \
					-e "s/^#\(ClamdSocket unix:.*\)/\1/" \
					-e "s/^#\(User .*\)/\1/" \
					-e "s/^#\(MilterSocket unix:.*\)/\1/" \
					-e "s:^\#\(LogFile\) .*:\1 ${EPREFIX}/var/log/clamav/clamav-milter.log:" \
					"${ED}"/etc/clamav/clamav-milter.conf.sample > \
					"${ED}"/etc/clamav/clamav-milter.conf || die

				systemd_newunit "${FILESDIR}/clamav-milter.service-0.104.0" clamav-milter.service
			fi

			local i
			for i in clamd freshclam clamav-milter
			do
				if [[ -f "${ED}"/etc/"${i}".conf.sample ]] ; then
					mv "${ED}"/etc/"${i}".conf{.sample,} || die
				fi
			done

			# These both need to be writable by the clamav user.
			# TODO: use syslog by default; that's what it's for.
			diropts -o clamav -g clamav
			keepdir /var/lib/clamav
			keepdir /var/log/clamav
		fi
	fi

	if use doc ; then
		local HTML_DOCS=( docs/html/. )
		einstalldocs
	fi

	# Don't install man pages for utilities we didn't install
	if use libclamav-only ; then
		rm -r "${ED}"/usr/share/man || die
	fi

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

pkg_postinst() {
	if ! use libclamav-only ; then
		if use systemd ; then
			tmpfiles_process clamav.conf
		fi
	fi

	if use milter ; then
		elog "For simple instructions how to setup the clamav-milter read the"
		elog "clamav-milter.README.gentoo in /usr/share/doc/${PF}"
	fi

	local databases=( "${EROOT}"/var/lib/clamav/main.c[lv]d )
	if [[ ! -f "${databases}" ]] ; then
		ewarn "You must run freshclam manually to populate the virus database"
		ewarn "before starting clamav for the first time."
	fi

	ewarn "This version of ClamAV provides separate OpenRC services"
	ewarn "for clamd, freshclam, clamav-milter, and clamonacc. The"
	ewarn "clamd service now starts only the clamd daemon itself. You"
	ewarn "should add freshclam (and perhaps clamav-milter) to any"
	ewarn "runlevels that previously contained clamd."
}