*: allow automatic updates of installed components

Signed-off-by: paulfantom <pawel@krupa.net.pl>

scripts/generate-versions.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+get_latest_version() {
+  curl --retry 5 --silent -H "Authorization: token $token" "https://api.github.com/repos/${1}/releases/latest" | jq '.tag_name' | tr -d '"v'
+}
+
+# token can be passed as `GITHUB_TOKEN` or `token` variable
+token=${token:-${GITHUB_TOKEN}}
+
+if [ -z "$token" ]; then
+	echo "GITHUB_TOKEN not set. Exiting"
+	exit 1
+fi
+
+cat <<-EOF
+{
+  "alertmanager": "$(get_latest_version "prometheus/alertmanager")"
+  "blackboxExporter": "$(get_latest_version "prometheus/blackbox_exporter")",
+  "grafana": "$(get_latest_version "grafana/grafana")",
+  "nodeExporter": "$(get_latest_version "prometheus/node_exporter")",
+  "prometheus": "$(get_latest_version "prometheus/prometheus")",
+  "prometheusAdapter": "$(get_latest_version "kubernetes-sigs/prometheus-adapter")",
+  "prometheusOperator": "$(get_latest_version "prometheus-operator/prometheus-operator")"
+}
+EOF