Add workflow

.github/workflows/ci.yml

@@ -0,0 +1,52 @@
+name: CI
+on: [push, pull_request]
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: pipx install "clang-format==21.*"
+      - run: clang-format --dry-run -Werror src/*.cpp src/*.hpp
+
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        compiler: [g++, clang++]
+        build_type: [Debug, Release]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Configure
+        run: |
+          cmake -B build \
+            -DCMAKE_CXX_COMPILER=${{ matrix.compiler }} \
+            -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
+            -DCMAKE_CXX_FLAGS="-Wall -Wextra"
+      - name: Build
+        run: cmake --build build -j
+
+  sanitizers:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sanitizer: ["address,undefined", "thread"]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Configure
+        run: |
+          cmake -B build -DCMAKE_BUILD_TYPE=Debug \
+            -DCMAKE_CXX_FLAGS="-fsanitize=${{ matrix.sanitizer }} -fno-omit-frame-pointer -g" \
+            -DCMAKE_EXE_LINKER_FLAGS="-fsanitize=${{ matrix.sanitizer }}"
+      - name: Build
+        run: cmake --build build -j
+      - name: Smoke run
+        env:
+          ASAN_OPTIONS: detect_leaks=1:exitcode=42
+          UBSAN_OPTIONS: halt_on_error=1:exitcode=42
+          TSAN_OPTIONS: exitcode=42
+        run: |
+          timeout 30 ./build/unixboard < /dev/null > /dev/null || code=$?
+          if [ "${code:-0}" = 42 ]; then echo "sanitizer reported an error"; exit 1; fi