Merge pull request #1412 from dgrisonnet/add-changelogs

Add changelogs to automated version updates

.github/workflows/versions.yaml

@@ -23,11 +23,15 @@ jobs:
       with:
         go-version: 1.16
     - name: Upgrade versions
+      id: versions
       run: |
         export GITHUB_TOKEN=${{ secrets.GITHUB_TOKEN }}
         # Write to temporary file to make update atomic
         scripts/generate-versions.sh > /tmp/versions.json
         mv /tmp/versions.json jsonnet/kube-prometheus/versions.json
+        # Get the links to the changelogs of the updated versions and make them
+        # available to the reviewers
+        echo ::set-output name=new_changelogs::$(scripts/get-new-changelogs.sh)
       if: matrix.branch == 'main'
     - name: Update jsonnet dependencies
       run: |
@@ -49,7 +53,12 @@ jobs:
 
           This is an automated version and jsonnet dependencies update performed from CI.
 
-          Configuration of the workflow is located in `.github/workflows/versions.yaml`
+          Please review the following changelogs to make sure that we don't miss any important
+          changes before merging this PR.
+
+          ${{ steps.versions.outputs.new_changelogs }}
+
+          Configuration of the workflow is located in `.github/workflows/versions.yaml`.
 
           ## Type of change
 

scripts/get-new-changelogs.sh

+#!/bin/bash
+
+set -euo pipefail
+
+# Get the freshly updated components versions.
+# Should be only used after running ./scripts/generate-versions and before
+# committing any changes.
+get_updated_versions() {
+  # Get only the newly updated versions from the versions file.
+  echo "$(git diff -U0 -- "${VERSION_FILE}" | grep '^[+]' | grep -Ev '^(--- a/|\+\+\+ b/)' | tr -d '",:+' | awk -F'"' '{print $1}')"
+}
+
+# Returns github changelog url based on a given repository url and tag.
+get_changelog_url() {
+  echo "https://github.com/${1}/releases/tag/v${2}"
+}
+
+# Gets all the new changelogs from the updated components version.
+get_changelog_urls() {
+  while IFS= read -r updated_version; do
+    read -r component version <<< "${updated_version}"
+    case "${component}" in
+      alertmanager)
+        get_changelog_url "prometheus/alertmanager" "${version}"
+        ;;
+      blackboxExporter)
+        get_changelog_url "prometheus/blackbox_exporter" "${version}"
+        ;;
+      grafana)
+        get_changelog_url "grafana/grafana" "${version}"
+        ;;
+      kubeStateMetrics)
+        get_changelog_url "kubernetes/kube-state-metrics" "${version}"
+        ;;
+      nodeExporter)
+        get_changelog_url "prometheus/node_exporter" "${version}"
+        ;;
+      prometheus)
+        get_changelog_url "prometheus/prometheus" "${version}"
+        ;;
+      prometheusAdapter)
+        get_changelog_url "kubernetes-sigs/prometheus-adapter" "${version}"
+        ;;
+      prometheusOperator)
+        get_changelog_url "prometheus-operator/prometheus-operator" "${version}"
+        ;;
+      kubeRbacProxy)
+        get_changelog_url "brancz/kube-rbac-proxy" "${version}"
+        ;;
+      configmapReload)
+        get_changelog_url "jimmidyson/configmap-reload" "${version}"
+        ;;
+      *)
+        echo "Unknown component ${component} updated"
+        exit 1
+        ;;
+    esac
+  done <<< "$(get_updated_versions)"
+}
+
+# File is used to read current versions
+VERSION_FILE="$(pwd)/jsonnet/kube-prometheus/versions.json"
+
+get_changelog_urls