Add codecov step

Author: schwitanski

.github/workflows/ci.yml

@@ -19,39 +19,73 @@ jobs:
   build:
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-22.04, ubuntu-24.04, macos-latest]
         compiler: [gcc, clang]
+        generator: [Ninja, Unix Makefiles]
+        cmake_version: [default]
         exclude:
           - os: macos-latest
             compiler: gcc
-    
+        include:
+          - os: ubuntu-24.04
+            cmake_version: 3.28.3
+            generator: Unix Makefiles
+            compiler: gcc
+          - os: ubuntu-24.04
+            cmake_version: 3.28.3
+            generator: Ninja
+            compiler: gcc
+          # - os: ubuntu-24.04
+          #   cmake_version: 3.29.2
+
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Install CMake, lcov, gfortran on Linux
+      - name: Install lcov, compilers on Linux
         if: runner.os == 'Linux'
         run: |
           sudo apt-get update
-          sudo apt-get install -y cmake lcov gfortran
+          sudo apt-get install -y lcov gfortran ${{ matrix.compiler }}
+
+      - name: Install default CMake
+        if: runner.os == 'Linux' && matrix.cmake_version == 'default'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y cmake
+
+      - name: Install specific CMake version
+        if: runner.os == 'Linux' && matrix.cmake_version != 'default'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y wget
+          wget https://github.com/Kitware/CMake/releases/download/v${{ matrix.cmake_version }}/cmake-${{ matrix.cmake_version }}-linux-x86_64.tar.gz
+          tar -xzf cmake-${{ matrix.cmake_version }}-linux-x86_64.tar.gz
+          sudo cp -r cmake-${{ matrix.cmake_version }}-linux-x86_64/* /usr/local/
       
       - name: Install CMake, lcov on macOS
         if: runner.os == 'macOS'
         run: |
           brew update
           brew install cmake lcov
 
+      - name: Print CMake version
+        run: cmake --version
+
       - name: Configure and build
         run: |
-          mkdir build && cd build
-          cmake .. -DENABLE_COVERAGE=On
-          make
-          make gcov lcov test
-
-      - name: lcov report
-        uses: actions/upload-artifact@v4
-        with:
-          name: code-coverage-report
-          path: ./build/lcov
+          mkdir build
+          cmake -S . -B build -DCMAKE_C_COMPILER="${{ matrix.compiler }}" -G "${{ matrix.generator }}" -DENABLE_COVERAGE=On
+          cmake --build build
+          cmake --build build --target test
+          cmake --build build --target gcov
+          cmake --build build --target lcov
 
+      # - name: Codecov upload
+      #   uses: codecov/codecov-action@v5
+      #   with:
+      #     name: codecov-coverage
+      #     token: ${{ secrets.CODECOV_TOKEN }}
+      #     fail_ci_if_error: true