Try running the code-coverage from the stdlib-fpm branch.

Author: loiseaujc

.github/workflows/codecov.yml

@@ -3,7 +3,8 @@ name: fpm-deployment
 on: [push, pull_request]
 
 jobs:
-  test:
+  deploy:
+    name: Run tests and deploys the fpm branches
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -45,18 +46,69 @@ jobs:
           python config/fypp_deployment.py --with_xdp --with_qp
           fpm test --profile release --flag '-DWITH_XDP -DWITH_QP'
 
-    # Update and deploy the f90 files generated by github-ci to the `stdlib-fpm` branch.
+      # Update and deploy the f90 files generated by github-ci to the `stdlib-fpm` branch.
       - name: Deploy 🚀
         uses: JamesIves/[email protected]
         if: github.event_name != 'pull_request'
         with:
           BRANCH: stdlib-fpm
           FOLDER: stdlib-fpm
 
-    # Update and deploy the f90 files generated by github-ci to the `stdlib-fpm-ilp64` branch.
+      # Update and deploy the f90 files generated by github-ci to the `stdlib-fpm-ilp64` branch.
       - name: Deploy with 64-bit integer support 🚀
         uses: JamesIves/[email protected]
         if: github.event_name != 'pull_request'
         with:
           BRANCH: stdlib-fpm-ilp64
           FOLDER: stdlib-fpm-ilp64
+
+  coverage:
+    name: Generate and upload code coverage report
+    needs: deploy
+    if: github.ref == 'refs/heads/stdlib-fpm'
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            toolchain: {compiler: gcc, version: 13}
+
+    steps:
+      - name: Checkout code
+        uses: actions/[email protected]
+
+      - uses: fortran-lang/setup-fortran@main
+        id: setup-fortran
+        with:
+          compiler: ${{ matrix.toolchain.compiler }}
+          version: ${{ matrix.toolchain.version }}
+
+      - name: Setup Fortran Package Manager
+        uses: fortran-lang/setup-fpm@v5
+        with:
+          fpm-version: 'v0.10.0'
+
+      - name: Prepare for code coverage
+        if: contains( matrix.os, 'ubuntu')
+        run: |
+          sudo apt-get install lcov
+
+      - name: Run tests to generate the coverage.
+        run: fpm test --profile release --flag '-DWITH_XDP -DWITH_QP -coverage'
+
+      - name: Create coverage report
+        run: |
+          mkdir -p ${{ env.COV_DIR }}
+          mv ./build/gfortran_*/*/* ${{ env.COV_DIR }}
+          lcov --capture --initial --base-directory . --directory ${{ env.COV_DIR }} --output-file ${{ env.COV_DIR }}/coverage.base --ignore-errors mismatch
+          lcov --capture           --base-directory . --directory ${{ env.COV_DIR }} --output-file ${{ env.COV_DIR }}/coverage.capture --ignore-errors mismatch
+          lcov --add-tracefile ${{ env.COV_DIR }}/coverage.base --add-tracefile ${{ env.COV_DIR }}/coverage.capture --output-file ${{ env.COV_DIR }}/coverage.info --ignore-errors mismatch
+        env:
+            COV_DIR: build/coverage
+
+      - name: Upload coverage report
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: build/coverage/coverage.info