app-metrics/node_exporter: revbump for install location and go migration

Signed-off-by: William Hubbs <williamh@gentoo.org>

app-metrics/node_exporter/files/node_exporter.initd

@@ -0,0 +1,23 @@
+#!/sbin/openrc-run
+# Copyright 2016-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+description="Prometheus machine metrics exporter"
+pidfile=${pidfile:-"/run/${RC_SVCNAME}.pid"}
+user=${user:-${RC_SVCNAME}}
+group=${group:-${RC_SVCNAME}}
+
+command="/usr/sbin/node_exporter"
+command_args="${command_args:---collector.textfile.directory=/var/lib/node_exporter/}"
+command_background="true"
+start_stop_daemon_args="--user ${user} --group ${group} \
+	--stdout /var/log/node_exporter/${RC_SVCNAME}.log \
+	--stderr /var/log/node_exporter/${RC_SVCNAME}.log"
+
+depend() {
+	after net
+}
+
+start_pre() {
+	checkpath -q -d -m 0755 -o ${user}:${group} /var/log/node_exporter
+}

app-metrics/node_exporter/node_exporter-1.0.0_rc0-r1.ebuild

@@ -0,0 +1,45 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+inherit go-module systemd
+MY_PV="v${PV/_rc/-rc.}"
+NODE_EXPORTER_COMMIT=ef7c058
+
+DESCRIPTION="Prometheus exporter for machine metrics"
+HOMEPAGE="https://github.com/prometheus/node_exporter"
+SRC_URI="https://github.com/prometheus/node_exporter/archive/${MY_PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="Apache-2.0 BSD BSD-2 MIT"
+SLOT="0"
+KEYWORDS="~amd64"
+
+CDEPEND="acct-group/node_exporter
+	acct-user/node_exporter"
+DEPEND=">=dev-util/promu-0.3.0
+	${CDEPEND}"
+RDEPEND="${CDEPEND}"
+
+S="${WORKDIR}/${PN}-${PV/_rc/-rc.}"
+
+src_prepare() {
+	default
+	sed -i -e "s/{{.Revision}}/${NODE_EXPORTER_COMMIT}/" .promu.yml || die
+}
+
+src_compile() {
+	mkdir -p bin || die
+	promu build -v --prefix node_exporter || die
+}
+
+src_install() {
+	dosbin node_exporter/node_exporter
+	dodoc {README,CHANGELOG,CONTRIBUTING}.md
+	systemd_dounit examples/systemd/node_exporter.service
+	insinto /etc/sysconfig
+	newins examples/systemd/sysconfig.node_exporter node_exporter
+	newinitd "${FILESDIR}"/${PN}.initd ${PN}
+	newconfd "${FILESDIR}"/${PN}.confd ${PN}
+	keepdir /var/lib/node_exporter /var/log/node_exporter
+	fowners ${PN}:${PN} /var/lib/node_exporter /var/log/node_exporter
+}