*: run promtool checks on all PrometheusRule objects

.github/workflows/prometheusrule.yml

@@ -0,0 +1,19 @@
+---
+name: prom-rules
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '1.15'
+      - run: go get -u github.com/prometheus/prometheus/cmd/promtool
+      - run: verify-prometheus-rules.sh

.gitignore

@@ -14,3 +14,4 @@ bin/
 templates/
 vendor/
 crdschemas/
+tmp/

hack/verify-prometheus-rules.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -euo pipefail
+
+mkdir -p tmp/rules
+
+for f in $(grep -ir --include=*.yaml "PrometheusRule" . | grep kind | grep -v CustomResourceDefinition | sed 's/:.*//'); do
+    echo "$f"
+    tmpfile="$(echo "$f" | sed 's/\//-/g' | sed 's/.-//').json"
+    gojsontoyaml -yamltojson < "$f" | jq .spec > "tmp/rules/$tmpfile";
+    ( cd tmp/rules && promtool check rules "$tmpfile")
+done