Make example change to generic chart

Author: samsimpson1

.github/workflows/diff-changes.yml

@@ -45,6 +45,11 @@ jobs:
     permissions:
       pull-requests: write
     steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.ref }}
+          show-progress: false
       - uses: actions/download-artifact@v4
         with:
           name: rendered-charts-base
@@ -56,29 +61,5 @@ jobs:
       - name: Diff charts and comment on PR
         env:
           GH_TOKEN: ${{ github.token }}
-        run: |
-          mkdir base head
-
-          mv base-r/rendered-charts/* base/
-          mv head-r/rendered-charts/* head/
-
-          DIFF=$(diff -r base/ head/)
-
-          if [ -z "$DIFF" ]; then
-            cat <<EOF > pr.md
-            No changes detected in rendered charts.
-          EOF
-          else
-            cat <<EOF > pr.md
-            <details>
-            <summary>Rendered charts diff</summary>
-            This PR results in the following changes to rendered charts:
-
-            ```diff
-            ${DIFF}
-            ```
-            </details>
-          EOF
-          fi
-
-          gh pr comment "${{github.event.pull_request.html_url}}" --create-if-none --edit-last --body-file pr.md
+          PR_URL: ${{ github.event.pull_request.html_url }}
+        run: ./create-diff-pr.sh

charts/generic-govuk-app/templates/ingress.yaml

@@ -10,6 +10,7 @@ metadata:
     app: {{ $fullName }}
     app.kubernetes.io/name: {{ $fullName }}
     app.kubernetes.io/component: app
+    some-other-label: something
   annotations:
     {{- (tpl (toYaml .Values.ingress.annotations) .) | trim | nindent 4 }}
 spec:

create-diff-pr.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+mkdir base head
+
+mv base-r/rendered-charts/* base/
+mv head-r/rendered-charts/* head/
+
+DIFF=$(diff -r base/ head/)
+
+if [ -z "$DIFF" ]; then
+  cat <<'EOF' > pr.md
+No changes detected in rendered charts.
+EOF
+else
+cat <<'EOF' > pr.md
+<details>
+<summary>Rendered charts diff</summary>
+This PR results in the following changes to rendered charts:
+
+```diff
+EOF
+  {
+    echo "$DIFF"
+    echo '```'
+    echo '</details>'
+  } >> pr.md
+fi
+
+gh pr comment "${PR_URL}" --create-if-none --edit-last --body-file pr.md