# Copyright 1999-2018 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

inherit user systemd

DESCRIPTION="Folding@Home is a distributed computing project for protein folding"
HOMEPAGE="https://foldingathome.org/"

MY_P="fahclient_${PV}-64bit-release"
SRC_URI="https://download.foldingathome.org/releases/public/release/fahclient/debian-stable-64bit/v$(ver_cut 1-2)/${MY_P}.tar.bz2 -> ${MY_P}-debian.tar.bz2"

RESTRICT="mirror bindist strip"

LICENSE="FAH-EULA-2014 FAH-special-permission"
SLOT="0"
KEYWORDS="~amd64"
IUSE=""
# Expressly listing all deps, as this is a binpkg and it is doubtful whether
# e.g. uclibc or clang can provide what is necessary at runtime
RDEPEND="
	sys-devel/gcc
	sys-libs/glibc
	sys-libs/zlib"

S="${WORKDIR}/${MY_P}"

QA_PREBUILT="opt/foldingathome/*"

pkg_setup() {
	elog ""
	elog "Special permission is hereby granted to the Gentoo project to provide an"
	elog "automated installer package which downloads and installs the Folding@home client"
	elog "software. Permission is also granted for future Gentoo installer packages on the"
	elog "condition that they continue to adhere to all of the terms of the accompanying"
	elog "Folding@home license agreements and display this notice."
	elog "-- Vijay S. Pande, Stanford University, 07 May 2013"
	elog ""
	elog "(ref: http://foldingforum.org/viewtopic.php?f=16&t=22524&p=241992#p241992 )"
	elog ""

	enewuser foldingathome -1 -1 "${EPREFIX}"/opt/foldingathome
}

src_install() {
	exeinto /opt/foldingathome
	doexe FAHClient FAHCoreWrapper

	insinto /opt/foldingathome
	doins sample-config.xml

	fowners -R foldingathome:foldingathome /opt/foldingathome

	dodoc CHANGELOG.md README.md

	newconfd - foldingathome <<- EOF
		# Config file for ${EPREFIX}/etc/init.d/foldingathome
		#
		# The f@h client configuration can be found in /opt/foldingathome/config.xml
		# Run emerge --config ${CATEGORY}/${PN} to configure your client.

		# The options that may be passed to the client can be obtained
		# by running ${EPREFIX}/opt/foldingathome/FAHClient --help
		FOLD_OPTS=""
EOF
	newinitd - foldingathome <<- EOF
		#!/sbin/openrc-run
		# Copyright 1999-2018 Gentoo Authors
		# Distributed under the terms of the GNU General Public License v2

		command="${EPREFIX}/opt/foldingathome/FAHClient"
		command_args="\${FOLD_OPTS}"
		command_user=foldingathome
		command_background=1
		directory="${EPREFIX}/opt/foldingathome"
		pidfile="/run/\${RC_SVCNAME}.pid"
EOF

	systemd_newunit - foldingathome.service <<- EOF
		[Unit]
		Description=Folding@Home V7 Client
		Documentation=https://foldingathome.org

		[Service]
		Type=simple
		User=foldingathome
		WorkingDirectory=${EPREFIX}/opt/foldingathome
		PIDFile=/run/fahclient.pid
		ExecStart=${EPREFIX}/opt/foldingathome/FAHClient -v start
		ExecReload=${EPREFIX}/opt/foldingathome/FAHClient -v restart
		ExecStop=${EPREFIX}/opt/foldingathome/FAHClient -v stop
		KillMode=process

		[Install]
		WantedBy=multi-user.target
EOF
}

pkg_postinst() {
	elog "To run Folding@home in the background at boot:"
	elog "(openrc)\trc-update add foldingathome default"
	elog "(systemd)\tsystemctl enable foldingathome"
	elog ""
	if [ ! -e "${EPREFIX}"/opt/foldingathome/config.xml ]; then
		elog "No config.xml file found -- please run"
		elog "emerge --config ${CATEGORY}/${PN} to configure your client,"
		elog "or specify all necessary runtime options in FOLD_OPTS within"
		elog "${EPREFIX}/etc/conf.d/foldingathome"
		elog ""
	fi
	if ver_test $(set -- ${REPLACING_VERSIONS} 999; echo $1) -lt 7.5.1; then
		elog "NOTE, the 'initfolding' helper script has been dropped, please"
		elog "use emerge --config ${P} or run FAHClient --configure directly"
		elog "and adjust file permissions and ownership yourself"
		elog ""
	fi
	elog "Please see ${EPREFIX}/opt/foldingathome/FAHClient --help for more details."
	einfo ""
	einfo "The original package maintainer encourages you to acquire a username and join team 36480."
	einfo "http://folding.stanford.edu/English/Download#ntoc2"
	einfo ""
}

pkg_postrm() {
	if [[ -z ${REPLACED_BY_VERSION} ]]; then
		elog "Folding@home data files were not removed."
		elog "Remove them manually from ${EPREFIX}/opt/foldingathome"
	fi
}

pkg_config() {
	cd "${EPREFIX}"/opt/foldingathome || die
	su foldingathome -s /bin/sh -c "./FAHClient --configure"
}