Setting up a pipeline

.gitea/workflows/ci.yml

@@ -0,0 +1,53 @@
+name: CI
+
+on:
+  push:
+    branches: ["**"]
+  pull_request:
+    branches: ["**"]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    container:
+      image: sagemath/sagemath:10.4
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install ruff
+        run: sage --pip install ruff
+
+      - name: Preparse .sage files
+        # Turns each *.sage file into real Python (*.sage.py) so ruff can
+        # parse it, and prepends the `from sage.all import *` that `sage`
+        # normally injects at runtime, so Sage's globals (ZZ, var, matrix, ...)
+        # resolve instead of looking like undefined names.
+        run: |
+          set -e
+          for f in $(find . -name "*.sage" -not -path "./playground/*"); do
+            sage --preparse "$f"
+            printf 'from sage.all import *  # noqa: F401,F403\n%s\n' "$(cat "${f}.py")" > "${f}.py"
+          done
+
+      - name: ruff check
+        # --no-respect-gitignore: *.sage.py is gitignored (it's generated, see
+        # the previous step) but that's exactly what we need to lint here.
+        run: sage --python -m ruff check --no-respect-gitignore .
+
+  test:
+    runs-on: ubuntu-latest
+    needs: lint
+    container:
+      image: sagemath/sagemath:10.4
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install pytest
+        run: sage --pip install pytest
+
+      - name: Run tests
+        run: sage --python -m pytest tests/