ci pipeline in development

.github/workflows/ci.yml

@@ -14,11 +14,26 @@ jobs:
     container: dolfinx/dolfinx:v0.7.2
     strategy:
       fail-fast: false
+      matrix:
+        python-version: ["3.8"]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
         with:
-          python-version: "3.8"
+          python-version: ["3.8"]
+      - name: Install flake8
+        run: python -m pip install flake8
+      - name: Flake8 lint
+        uses: py-actions/flake8@v2
+        with:
+          max-line-length: "80"
+        run: |
+          flake8 ./mdfenicsx/mesh_data/mesh.py
+          flake8 ./mdfenicsx/mesh_motion_classes.py
+          flake8 ./demo/0_fundamental_deformation/0_fundamentals.py
+          flake8 ./demo/0_fundamental_deformation/mesh_data/mesh.py
+          flake8 ./demo/*/*.py
+          flake8 ./demo/*/mesh_data/mesh.py
       - name: Test dolfinx
         run: |
          python3 -c "import ufl; print('ufl import success')"