Add metadata check script

.gitlab-ci.yml

@@ -25,6 +25,19 @@ test-urls:
   allow_failure: true
   needs: []
 
+test-metadata:
+  image: debian:bookworm-slim
+  stage: test
+  tags:
+    - lightweight
+  before_script:
+  - apt update && apt install -y --no-install-recommends
+      python3
+      python3-markdown
+      python3-git
+  script:
+  - scripts/check_metadata.py .
+
 test-images:
   image: debian:bookworm-slim
   stage: test

scripts/check_metadata.py

+#!/usr/bin/env python3
+
+# Check metadata from changed files.
+
+import markdown
+import os
+import re
+import sys
+
+from git import Repo
+
+repo = Repo(sys.argv[1])
+
+print("HEAD commit message:")
+print(repo.head.commit.message)
+
+sys.exit(0)