[__jitsi_meet] Simplify exporter logic and update it to 1.2.0

This uses the newly merged __single_binary_service and:

- Fixes the bug where once added, the exporter could not be removed
- Simplifies keeping it up to date

Sponsored by:   camilion.eu, eXO.cat

type/__jitsi_meet/explorer/prometheus-jitsi-meet-explorer-version

@@ -1,7 +0,0 @@
-#!/bin/sh -e
-
-EXPORTER_VERSION_FILE="/usr/local/bin/.prometheus-jitsi-meet-exporter.cdist.version"
-
-if [ -f "${EXPORTER_VERSION_FILE}" ]; then
-	cat "${EXPORTER_VERSION_FILE}"
-fi

type/__jitsi_meet/manifest

@@ -1,7 +1,6 @@
 #!/bin/sh -e
 
 os="$(cat "${__global}/explorer/os")"
-init="$(cat "${__global}/explorer/init")"
 case "${os}" in
 	devuan|debian)
 	;;
@@ -27,8 +26,6 @@ if [ -z "${TURN_SERVER}" ]; then
 	TURN_SERVER="${JITSI_HOST}"
 fi
 
-PROMETHEUS_JITSI_EXPORTER_IS_VERSION="$(cat "${__object}/explorer/prometheus-jitsi-meet-explorer-version")"
-
 # The rest is loosely based on Jitsi's documentation
 # https://jitsi.github.io/handbook/docs/devops-guide/devops-guide-quickstart
 
@@ -203,65 +200,26 @@ export JITSI_HOST
 "${__type}/files/jicofo.conf.sh" | \
 	__file /etc/jitsi/jicofo/jicofo.conf --mode 0444 --source '-'
 
+
 # These two should be changed on new release
-PROMETHEUS_JITSI_EXPORTER_SHOULD_VERSION="1.1.5"
+EXPORTER_VERSION="1.2.0"
-PROMETHEUS_JITSI_EXPORTER_CHECKSUM="sha256:3ddf43a48d9a2f62be1bc6db9e7ba75d61994f9423e5c5b28be019f41f06f745"
+EXPORTER_CHECKSUM="sha256:6377ffa7be0c7deb66545616add7245da96f8b7746d6712f41cfa9fe72c935ce"
-PROMETHEUS_JITSI_EXPORTER_URL="https://github.com/systemli/prometheus-jitsi-meet-exporter/releases/download/${PROMETHEUS_JITSI_EXPORTER_SHOULD_VERSION}/prometheus-jitsi-meet-exporter-linux-amd64"
+EXPORTER_URL="https://github.com/systemli/prometheus-jitsi-meet-exporter/releases/download/${EXPORTER_VERSION}/prometheus-jitsi-meet-exporter_${EXPORTER_VERSION}_linux_amd64.tar.gz"
-PROMETHEUS_JITSI_EXPORTER_VERSION_FILE="/usr/local/bin/.prometheus-jitsi-meet-exporter.cdist.version"
+if [ -f "${__object}/parameter/disable-prometheus-exporter" ]; then
-if [ ! -f "${__object}/parameter/disable-prometheus-exporter" ]; then
+	EXPORTER_STATE="absent"
-	case "${init}" in
+else
-		init|sysvinit)
+	EXPORTER_STATE="present"
-			__runit
-			require="__runit" __runit_service \
-				prometheus-jitsi-meet-exporter --log --source - <<EOF
-			#!/bin/sh -e
-			cd /tmp
-			exec chpst -u "nobody:nogroup" env HOME="/tmp" \\
-			     prometheus-jitsi-meet-exporter \\
-				-videobridge-url 'http://localhost:8888/stats' \\
-				-web.listen-address ':9888' 2>&1
-EOF
-
-			export require="__runit_service/prometheus-jitsi-meet-exporter"
-			JITSI_MEET_EXPORTER_SERVICE="sv %s prometheus-jitsi-meet-exporter"
-		;;
-		systemd)
-			__systemd_unit prometheus-jitsi-meet-exporter.service \
-				--source "-" \
-				--enablement-state "enabled" <<EOF
-[Unit]
-Description=Metrics Exporter for Jitsi Meet
-After=network.target
-
-[Service]
-Type=simple
-DynamicUser=yes
-ExecStart=/usr/local/bin/prometheus-jitsi-meet-exporter -videobridge-url 'http://localhost:8888/stats' -web.listen-address ':9888'
-Restart=always
-
-[Install]
-WantedBy=multi-user.target
-EOF
-			export require="__systemd_unit/prometheus-jitsi-meet-exporter.service"
-			JITSI_MEET_EXPORTER_SERVICE="service prometheus-jitsi-meet-exporter %s"
-		;;
-	esac
-	if [ "${PROMETHEUS_JITSI_EXPORTER_SHOULD_VERSION}" != \
-		"${PROMETHEUS_JITSI_EXPORTER_IS_VERSION}" ]; then
-		# shellcheck disable=SC2059
-		__download \
-			/tmp/prometheus-jitsi-meet-exporter \
-			--url "${PROMETHEUS_JITSI_EXPORTER_URL}" \
-			--download remote \
-			--sum "${PROMETHEUS_JITSI_EXPORTER_CHECKSUM}" \
-			--onchange "$(printf "${JITSI_MEET_EXPORTER_SERVICE}" "stop") || true; chmod 555 /tmp/prometheus-jitsi-meet-exporter && mv /tmp/prometheus-jitsi-meet-exporter /usr/local/bin/prometheus-jitsi-meet-exporter && $(printf "${JITSI_MEET_EXPORTER_SERVICE}" "restart")"
-		printf "%s" "${PROMETHEUS_JITSI_EXPORTER_SHOULD_VERSION}" | \
-			require="${require} __download/tmp/prometheus-jitsi-meet-exporter" __file \
-			"${PROMETHEUS_JITSI_EXPORTER_VERSION_FILE}" \
-			--source "-"
-	fi
 fi
-# TODO: disable the exporter if it is deployed and then admin changes their mind
+__evilham_single_binary_service prometheus-jitsi-meet-exporter \
+	--state "${EXPORTER_STATE}" \
+	--do-not-manage-user \
+	--user "nobody" \
+	--group "nogroup" \
+	--version "${EXPORTER_VERSION}" \
+	--checksum "${EXPORTER_CHECKSUM}" \
+	--url "${EXPORTER_URL}" \
+	--unpack \
+	--service-args "-videobridge-url 'http://localhost:8080/colibri/stats' -web.listen-address ':9888'"
 
 #
 # Setup interpreter assets if requested