workflows: Check that generated code is up-to-date

Fixes #425

Signed-off-by: Jussi Kukkonen <[email protected]>

Author: jku

.github/workflows/tests.yaml

@@ -97,3 +97,17 @@ jobs:
         with:
           version: v1.64
           args: --timeout=10m --verbose
+
+  gen-check:
+    name: Check generated code
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
+        with:
+          go-version-file: './go.mod'
+          check-latest: true
+      - name: Verify generated code is unchanged
+        run: |
+          make gen
+          git diff --exit-code