Merge #5876

5876: Try code coverage (fixes #5873) r=Robyt3 a=def-

<!-- What is the motivation for the changes of this pull request? -->

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## Checklist

- [ ] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test (especially base/) or added coverage to integration test
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: def <dennis@felsin9.de>

.github/workflows/build.yaml

@@ -58,7 +58,7 @@ jobs:
       run: |
         sudo apt-get update -y
         sudo apt-get upgrade -y
-        sudo apt-get install pkg-config cmake ninja-build libfreetype6-dev libnotify-dev libsdl2-dev libsqlite3-dev libvulkan-dev glslang-tools spirv-tools libavcodec-dev libavformat-dev libavutil-dev libswresample-dev libswscale-dev libx264-dev libpng-dev valgrind -y
+        sudo apt-get install pkg-config cmake ninja-build libfreetype6-dev libnotify-dev libsdl2-dev libsqlite3-dev libvulkan-dev glslang-tools spirv-tools libavcodec-dev libavformat-dev libavutil-dev libswresample-dev libswscale-dev libx264-dev libpng-dev valgrind gcovr -y
 
     - name: Prepare Linux (non-fancy)
       if: ${{ contains(matrix.os, 'ubuntu') && !matrix.fancy }}
@@ -138,16 +138,22 @@ jobs:
         ./DDNet-Server shutdown
 
     - name: Build headless client
+      if: contains(matrix.os, 'ubuntu-latest')
       env: ${{ matrix.env }}
       run: |
         mkdir headless
         cd headless
+        CFLAGS="$CFLAGS --coverage"
+        CXXFLAGS="$CXXFLAGS --coverage"
+        LDFLAGS="$LDFLAGS --coverage"
         ${{ matrix.cmake-path }}cmake --version
         ${{ matrix.cmake-path }}cmake ${{ matrix.cmake-args }} -DHEADLESS_CLIENT=ON -DCMAKE_BUILD_TYPE=Debug -Werror=dev -DDOWNLOAD_GTEST=ON -DDEV=ON -DCMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG=. ..
         ${{ matrix.cmake-path }}cmake --build . --config Debug  ${{ matrix.build-args }}
     - name: Test headless client
+      if: contains(matrix.os, 'ubuntu-latest')
       run: |
         cd headless
+        ${{ matrix.cmake-path }}cmake --build . --config Debug --target run_tests ${{ matrix.build-args }}
         ./DDNet-Server &
         ./DDNet "cl_download_skins 0;connect localhost:8303;quit"
 
@@ -174,7 +180,7 @@ jobs:
         ./DDNet-Server shutdown
 
     - name: Run integration tests with Valgrind's Memcheck
-      if: contains(matrix.os, 'ubuntu')
+      if: contains(matrix.os, 'ubuntu-latest')
       run: |
         cd headless
         ./integration_test.sh --valgrind-memcheck
@@ -191,3 +197,10 @@ jobs:
       with:
         name: ddnet-${{ matrix.os }}
         path: release/artifacts
+
+    - name: Upload Codecov report
+      if: contains(matrix.os, 'ubuntu-latest')
+      uses: codecov/codecov-action@v3
+      with:
+        gcov: true
+        gcov_include: src

README.md

@@ -1,4 +1,4 @@
-[![DDraceNetwork](https://ddnet.org/ddnet-small.png)](https://ddnet.org) [![](https://github.com/ddnet/ddnet/workflows/Build/badge.svg)](https://github.com/ddnet/ddnet/actions?query=workflow%3ABuild+event%3Apush+branch%3Amaster)
+[![DDraceNetwork](https://ddnet.org/ddnet-small.png)](https://ddnet.org) [![](https://github.com/ddnet/ddnet/workflows/Build/badge.svg)](https://github.com/ddnet/ddnet/actions?query=workflow%3ABuild+event%3Apush+branch%3Amaster) [![](https://codecov.io/gh/ddnet/ddnet/branch/master/graph/badge.svg)](https://codecov.io/gh/ddnet/ddnet/branch/master)
 
 Our own flavor of DDRace, a Teeworlds mod. See the [website](https://ddnet.org) for more information.