Add a test to ensure the chart versions match (#163)

Co-authored-by: Marco Franssen <[email protected]>

.github/workflows/helm-chart-ci.yaml

@@ -23,7 +23,7 @@ env:
   CHART_TESTING_VERSION: v3.7.1
 
 jobs:
-  check-docs:
+  checks:
     runs-on: ubuntu-22.04
 
     steps:
@@ -33,6 +33,22 @@ jobs:
       - name: Verify Docs updated
         run: ./helm-docs.sh
 
+      - name: Verify Spire appVersion
+        run: |
+          set +e
+          BASEVER=$(yq e .appVersion Chart.yaml)
+          for FILE in spiffe-oidc-discovery-provider spire-agent spire-server; do
+            VER=$(yq .appVersion charts/$FILE/Chart.yaml)
+            if [ "$VER" != "$BASEVER" ]; then
+              {
+                echo "## Version mismatch"
+                echo
+                echo "There is a mismatch between the chart version ($BASEVER) and subchart version ($VER). The issue may be in file $FILE. Please fix."
+              } >> "$GITHUB_STEP_SUMMARY"
+              exit 1
+            fi
+          done
+
   lint-chart:
     runs-on: ubuntu-22.04