CI/CD improvements

.github/workflows/ci_pipeline.yml

@@ -2,6 +2,9 @@ name: CI Pipeline
 
 on: [push]
 
+env:
+  MAIN_PYTHON: "3.9"
+
 jobs:
   test:
     name: Test 🧪
@@ -36,13 +39,32 @@ jobs:
       - name: Run type check
         run: mypy . --exclude build
 
-      - name: Run unit tests with Xvfb, necessary for clipboard tests
+      - name: Run unit tests with Xvfb (necessary for clipboard tests) and coverage
         run: xvfb-run coverage run -m pytest
 
+      - name: Store the coverage report
+        uses: actions/upload-artifact@v3
+        with:
+          name: coverage-report-${{ matrix.python-version }}
+          path: .coverage
+
+  coverage:
+    name: Upload coverage report 📊 to Codecov
+    runs-on: ubuntu-latest
+    needs: test
+
+    steps:
+      - name: Download the coverage reports
+        uses: actions/download-artifact@v3
+        with:
+          name: coverage-report-${{ env.MAIN_PYTHON }}
+          path: .coverage
+
       - name: Upload coverage report
         uses: codecov/codecov-action@v4
         with:
           fail_ci_if_error: true
+          files: .coverage
           token: ${{ secrets.CODECOV_TOKEN }}
 
   build:
@@ -53,10 +75,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Setup python 3.9
+      - name: Setup python ${{ env.MAIN_PYTHON }}
         uses: actions/setup-python@v5
         with:
-          python-version: "3.9"
+          python-version: ${{ env.MAIN_PYTHON }}
 
       - name: Install pypa/build
         run: pip install build