gha: Add code coverage report workflow for C++

It uses gcovr to compute code coverage for libtalipot-core and its
plugins then update the report to coveralls for analysis.

This should help adding missing tests to ensure more code is covered.

.github/workflows/code-coverage.yml

@@ -0,0 +1,89 @@
+name: code-coverage
+on: [push, pull_request]
+jobs:
+  ubuntu:
+    name: Talipot C++ code coverage
+    runs-on: ubuntu-latest
+    steps:
+      - name: Cancel Previous Runs
+        uses: styfle/[email protected]
+        with:
+          access_token: ${{ github.token }}
+      - name: Checkout Talipot code
+        uses: actions/checkout@v3
+      - name: Apt update
+        run: sudo apt update
+      - name: Install Talipot build dependencies
+        run: sudo apt install
+          cmake
+          ccache
+          ninja-build
+          libqhull-dev
+          libyajl-dev
+          libgraphviz-dev
+          libpython3-dev
+          libcppunit-dev
+          binutils-dev
+          libzstd-dev
+          libgit2-dev
+          qtbase5-dev
+          libqt5webkit5-dev
+          libquazip5-dev
+          libglew-dev
+          libfreetype6-dev
+          libfribidi-dev
+          libfontconfig-dev
+          python3
+          python3-pip
+          doxygen
+          graphviz
+          xvfb
+      - name: Install sip
+        run: |
+          sudo pip3 install --upgrade pip
+          sudo pip3 install sip
+      - name: Prepare ccache timestamp
+        id: get-current-date
+        run: |
+          echo "date=$(date -u "+%Y-%m-%d-%H-%m-%S")" >> $GITHUB_OUTPUT
+        shell: bash
+      - name: Cache files
+        uses: actions/cache@v3
+        with:
+          path: ~/.ccache
+          key: ${{ matrix.config.os }}-ccache-${{ steps.get-current-date.outputs.date }}
+          restore-keys: |
+            ${{ matrix.config.os }}-ccache-
+      - name: Create build directory
+        run: mkdir build
+      - name: Configure Talipot build with CMake
+        working-directory: ./build
+        run: cmake .. -G Ninja
+          -DCMAKE_BUILD_TYPE=Release
+          -DCMAKE_INSTALL_PREFIX=$PWD/install
+          -DTALIPOT_BUILD_TESTS=ON
+          -DTALIPOT_USE_CCACHE=ON
+          -DTALIPOT_BUILD_DOC=OFF
+          -DTALIPOT_CODE_COVERAGE=ON
+      - name: Talipot build
+        working-directory: ./build
+        run: ninja -j4
+      - name: Run Talipot unit tests
+        working-directory: ./build
+        run: xvfb-run ninja tests
+      - name: Generate and upload code coverage report
+        uses: threeal/gcovr-action@main
+        with:
+          excludes: |
+            build/*
+            library/talipot-gui/*
+            library/talipot-ogl/*
+            library/talipot-python/*
+            plugins/interactor/*
+            plugins/view/*
+            software/*
+            tests/*
+            thirdparty/*
+            utils/*
+          coveralls-send: true
+          github-token: ${{ secrets.GITHUB_TOKEN }}

cmake/TalipotUseFile.cmake

@@ -389,6 +389,10 @@ MACRO(TALIPOT_SET_COMPILER_OPTIONS_AND_DEFINITIONS)
         "<CMAKE_RANLIB> -no_warning_for_no_symbols -c <TARGET>")
   ENDIF(APPLE)
 
+  IF(CMAKE_COMPILER_IS_GNUCXX AND TALIPOT_CODE_COVERAGE)
+    TALIPOT_SET_CXX_FLAGS("-fprofile-arcs -ftest-coverage -O0")
+  ENDIF(CMAKE_COMPILER_IS_GNUCXX AND TALIPOT_CODE_COVERAGE)
+
 ENDMACRO(TALIPOT_SET_COMPILER_OPTIONS_AND_DEFINITIONS)
 
 # for backward compatibility with Talipot < 5.1 for external projects

gcovr.cfg

@@ -0,0 +1 @@
+gcov-ignore-errors = no_working_dir_found