Fail CI on stale generated code

Closes: #10

.github/workflows/build-images.yml

@@ -17,8 +17,16 @@ env:
   COMPOSE_DOCKER_CLI_BUILD: 1
 
 jobs:
+  check-generated-code:
+    runs-on: ubuntu-latest
+    if: contains(github.event.pull_request.labels.*.name, 'dependencies') || github.event_name == 'push' || github.event_name == 'workflow_dispatch'
+    steps:
+      - run: bundle exec rake generate:all
+      - run: [[ $(git status --porcelain) ]] && exit 1
   build-core-images:
     runs-on: ubuntu-latest
+    needs:
+      - check-generated-code
     if: contains(github.event.pull_request.labels.*.name, 'dependencies') || github.event_name == 'push' || github.event_name == 'workflow_dispatch'
     strategy:
       # Build the core images first using the matrix strategy, from there, we will get a list
@@ -34,7 +42,7 @@ jobs:
       # you must do so via a run step, vs the `env: ` workflow syntax. Additinally see
       # https://docs.github.com/en/actions/learn-github-actions/environment-variables#passing-values-between-steps-and-jobs-in-a-workflow
       - name: set PWD environt variable
-        run:  echo "PWD=$(pwd)" >> $GITHUB_ENV
+        run: echo "PWD=$(pwd)" >> $GITHUB_ENV
 
       - uses: actions/[email protected]
         with:
@@ -69,6 +77,8 @@ jobs:
   set-matrix:
     runs-on: ubuntu-latest
     if: contains(github.event.pull_request.labels.*.name, 'dependencies') || github.event_name == 'push' || github.event_name == 'workflow_dispatch'
+    needs:
+      - check-generated-code
     outputs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps: