fix: simplify CI workflow for Gitea Actions

.gitea/workflows/ci.yml

@@ -2,34 +2,26 @@ name: CI
 
 on:
   push:
-    branches:
+    branches: [main]
-      - main
   pull_request:
-    branches:
+    branches: [main]
-      - main
 
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout code
+      - run: |
-        uses: actions/checkout@v4
+          git clone --depth 1 https://github.com/${{ gitea.repository }}.git .
+          git fetch origin 'refs/heads/main':refs/heads/main
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        run: |
-        with:
+          apt-get update && apt-get install -y python3 python3-pip
-          python-version: '3.11'
 
       - name: Install dependencies
         run: |
-          pip install -e .
+          pip3 install -e .
-          pip install pytest pytest-cov
+          pip3 install pytest pytest-cov
 
       - name: Run tests
         run: pytest confsync/tests/ -v --tb=short
-
-      - name: Run linter
-        run: pip install ruff && ruff check .
-
-      - name: Run type checker
-        run: pip install mypy && mypy confsync/