app-metrics/node_exporter: Add systemd-patched ebuild fpr version 0.18.1.

Package-Manager: Portage-2.3.76, Repoman-2.3.16

app-metrics/node_exporter/node_exporter-0.18.1.ebuild

@@ -0,0 +1,53 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+inherit user golang-build golang-vcs-snapshot systemd
+
+EGO_PN="github.com/prometheus/node_exporter"
+EGIT_COMMIT="v${PV/_rc/-rc.}"
+NODE_EXPORTER_COMMIT="3db7773"
+ARCHIVE_URI="https://${EGO_PN}/archive/${EGIT_COMMIT}.tar.gz -> ${P}.tar.gz"
+KEYWORDS="~amd64"
+
+DESCRIPTION="Prometheus exporter for machine metrics"
+HOMEPAGE="https://github.com/prometheus/node_exporter"
+SRC_URI="${ARCHIVE_URI}"
+LICENSE="Apache-2.0"
+SLOT="0"
+IUSE=""
+PATCHES=("${FILESDIR}/${P}-systemd.patch")
+
+DEPEND=">=dev-lang/go-1.12
+	>=dev-util/promu-0.3.0"
+
+pkg_setup() {
+	enewgroup ${PN}
+	enewuser ${PN} -1 -1 -1 ${PN}
+}
+
+src_prepare() {
+	default
+	sed -i -e "s/{{.Revision}}/${NODE_EXPORTER_COMMIT}/" src/${EGO_PN}/.promu.yml || die
+}
+
+src_compile() {
+	pushd src/${EGO_PN} || die
+	mkdir -p bin || die
+	GO111MODULE=on GOPATH="${S}" GOCACHE="${T}"/go-cache promu build -v --prefix node_exporter || die
+	popd || die
+}
+
+src_install() {
+	pushd src/${EGO_PN} || die
+	dobin node_exporter/node_exporter
+	dodoc {README,CHANGELOG,CONTRIBUTING}.md
+	systemd_dounit examples/systemd/node_exporter.service
+	insinto /etc/sysconfig/node_exporter
+	doins examples/systemd/sysconfig.node_exporter
+	popd || die
+	keepdir /var/lib/node_exporter /var/log/node_exporter
+	fowners ${PN}:${PN} /var/lib/node_exporter /var/log/node_exporter
+	newinitd "${FILESDIR}"/${PN}-1.initd ${PN}
+	newconfd "${FILESDIR}"/${PN}.confd ${PN}
+}