Check that pre-commit generated files are in git

Author: sbidoul

src/.github/workflows/pre-commit.yml.jinja

@@ -18,3 +18,11 @@ jobs:
           # Python 3.9.8+, and we can't bump black without reformatting.
           python-version: {% if odoo_version < 15 %}"3.9.7"{% else %}"3.10"{% endif %}
       - uses: pre-commit/[email protected]
+      - name: Check that all files generated by pre-commit are in git
+        run: |
+          newfiles="$(git ls-files --others --exclude-from=.gitignore)"
+          if [ "$newfiles" != "" ] ; then
+              echo "Please check-in the following files:"
+              echo "$newfiles"
+              exit 1
+          fi