# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7
inherit go-module user

MY_PV=v${PV/_rc/-rc.}
GIT_COMMIT=eba3fdcbf

DESCRIPTION="Prometheus monitoring system and time series database"
HOMEPAGE="https://github.com/prometheus/prometheus"
SRC_URI="https://github.com/prometheus/prometheus/archive/${MY_PV}.tar.gz -> ${P}.tar.gz
	https://dev.gentoo.org/~williamh/dist/${P}-assets.tar.gz"

LICENSE="Apache-2.0 BSD BSD-2 ISC MIT MPL-2.0"
SLOT="0"
KEYWORDS="~amd64"
IUSE=""

BDEPEND=">=dev-util/promu-0.3.0"
DEPEND="!app-metrics/prometheus-bin"

PROMETHEUS_HOME="/var/lib/prometheus"

RESTRICT+=" test"

pkg_setup() {
	enewgroup prometheus
	enewuser prometheus -1 -1 "${PROMETHEUS_HOME}" prometheus
}

src_prepare() {
	default
	sed -i -e "s/{{.Revision}}/${GIT_COMMIT}/" .promu.yml || die
	mv ../assets_vfsdata.go web/ui || die
}

src_compile() {
	promu build --prefix bin -v || die
}

src_install() {
	dobin bin/*
	dodoc -r {documentation,{README,CHANGELOG,CONTRIBUTING}.md}
	insinto /etc/prometheus
	doins documentation/examples/prometheus.yml
	insinto /usr/share/prometheus
	doins -r console_libraries consoles
	dosym ../../usr/share/prometheus/console_libraries /etc/prometheus/console_libraries
	dosym ../../usr/share/prometheus/consoles /etc/prometheus/consoles

	newinitd "${FILESDIR}"/prometheus.initd prometheus
	newconfd "${FILESDIR}"/prometheus.confd prometheus
	keepdir /var/log/prometheus /var/lib/prometheus
	fowners prometheus:prometheus /var/log/prometheus /var/lib/prometheus
}

pkg_postinst() {
	if has_version '<net-analyzer/prometheus-2.0.0_rc0'; then
		ewarn "Old prometheus 1.x TSDB won't be converted to the new prometheus 2.0 format"
		ewarn "Be aware that the old data currently cannot be accessed with prometheus 2.0"
		ewarn "This release requires a clean storage directory and is not compatible with"
		ewarn "files created by previous beta releases"
	fi
}