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# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7
inherit user golang-build golang-vcs-snapshot systemd

EGO_PN="github.com/oliver006/redis_exporter"
EGIT_COMMIT="2436f66e35c2ea6876ac857e25ae13ce909e8c3a"
ARCHIVE_URI="https://${EGO_PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
KEYWORDS="~amd64"

DESCRIPTION="Prometheus Exporter for Redis Metrics. Supports Redis 2.x, 3.x and 4.x"
HOMEPAGE="https://github.com/oliver006/redis_exporter"
SRC_URI="${ARCHIVE_URI}"
LICENSE="MIT Apache-2.0 BSD"
SLOT="0"
IUSE=""
S=${WORKDIR}/${P}/src/${EGO_PN}

pkg_setup() {
	enewgroup ${PN}
	enewuser ${PN} -1 -1 -1 ${PN}
}

src_prepare() {
	default
	sed -e "s|\(^[[:space:]]*VERSION[[:space:]]*=[[:space:]]*\).*|\1\"${PV}\"|" \
		-e "s|\(^[[:space:]]*BUILD_DATE[[:space:]]*=[[:space:]]*\).*|\1\"$(LC_ALL=C date -u)\"|" \
		-e "s|\(^[[:space:]]*COMMIT_SHA1[[:space:]]*=[[:space:]]*\).*|\1\"${EGIT_COMMIT}\"|" \
		-i main.go || die

	sed -e 's:TestCommandStats(:_\0:' \
		-e 's:TestExportClientList(:_\0:' \
		-e 's:TestGetKeyInfo(:_\0:' \
		-e 's:TestGetKeysFromPatterns(:_\0:' \
		-e 's:TestHTTPEndpoints(:_\0:' \
		-e 's:TestHostVariations(:_\0:' \
		-e 's:TestIncludeSystemMemoryMetric(:_\0:' \
		-e 's:TestKeySizeList(:_\0:' \
		-e 's:TestKeysReset(:_\0:' \
		-e 's:TestKeyValuesAndSizes(:_\0:' \
		-e 's:TestLatencySpike(:_\0:' \
		-e 's:TestLuaScript(:_\0:' \
		-e 's:TestScanForKeys(:_\0:' \
		-e 's:TestSimultaneousRequests(:_\0:' \
		-e 's:TestSlowLog(:_\0:' \
		-i exporter_test.go || die
}

src_compile() {
	export -n GOCACHE XDG_CACHE_HOME #684052
	export GO111MODULE=on GOFLAGS="-mod=vendor -v -x" GOBIN="${WORKDIR}/${P}/bin"
	go install -work ${EGO_BUILD_FLAGS} \
		-ldflags="-X main.BuildVersion=${PV} -X main.BuildCommitSha=${EGIT_COMMIT} -X main.BuildDate=$(date +%F-%T)" \
		"${EGO_PN}" || die
}

src_test() {
	go test -work "${EGO_PN}" || die
}

src_install() {
	dobin "${GOBIN}/redis_exporter"
	dodoc README.md
	local dir
	for dir in /var/{lib,log}/${PN}; do
		keepdir "${dir}"
		fowners ${PN}:${PN} "${dir}"
	done
	newinitd "${FILESDIR}"/${PN}.initd ${PN}
	newconfd "${FILESDIR}"/${PN}.confd ${PN}
	insinto /etc/logrotate.d
	newins "${FILESDIR}/${PN}.logrotated" "${PN}"
	systemd_dounit "${FILESDIR}/${PN}.service"
}