Add bazel support for google benchmark

.bazelrc

@@ -0,0 +1,3 @@
+build --//core:codspeed_mode=instrumentation
+build --compilation_mode=dbg
+build --copt=-O2

.bazelversion

@@ -0,0 +1 @@
+7.6.1

.clang-format

@@ -0,0 +1,5 @@
+---
+Language:        Cpp
+BasedOnStyle:  Google
+PointerAlignment: Left
+...

.github/workflows/ci.yml

@@ -10,111 +10,104 @@ jobs:
   tests:
     runs-on: ubuntu-latest
     steps: 
-    - name: Checkout code
-      uses: actions/checkout@v3
-
-    - name: Cache build
-      uses: actions/cache@v3
-      with:
-        path: core/build-tests
-        key: ${{ runner.os }}-build-tests-${{ hashFiles('**/CMakeLists.txt', '**/examples/google_benchmark/**') }}
-
-    - name: Create build directory
-      run: mkdir -p core/build-tests
-
-    - name: Build tests
-      run: |
-        cd core/build-tests
-        cmake .. -DENABLE_TESTS=ON
-        make -j
-
-    - name: Run tests
-      run: | 
-        cd core/build-tests
-        GTEST_OUTPUT=json:test-results/ ctest
-
-    - name: Upload test results
-      uses: actions/upload-artifact@v4
-      if: failure()
-      with:
-        name: test_results
-        path: ${{runner.workspace}}/core/build-tests/test/test-results/**/*.json
-
-  instrumentation:
-    runs-on: ubuntu-latest
-
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Cache build
+        uses: actions/cache@v3
+        with:
+          path: core/build-tests
+          key: ${{ runner.os }}-build-tests-${{ hashFiles('**/CMakeLists.txt') }}
+
+      - name: Create build directory
+        run: mkdir -p core/build-tests
+
+      - name: Build tests
+        run: |
+          cd core/build-tests
+          cmake .. -DENABLE_TESTS=ON
+          make -j
+
+      - name: Run tests
+        run: | 
+          cd core/build-tests
+          GTEST_OUTPUT=json:test-results/ ctest
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: failure()
+        with:
+          name: test_results
+          path: ${{runner.workspace}}/core/build-tests/test/test-results/**/*.json
+
+  cmake-integration-tests:
+    strategy:
+      matrix:
+        include:
+          - codspeed-mode: "instrumentation"
+            runner: "ubuntu-latest"
+          - codspeed-mode: "walltime"
+            runner: "codspeed-macro"
+          - codspeed-mode: "off"
+            runner: "ubuntu-latest"
+    runs-on: ${{ matrix.runner }}
     steps:
-    - name: Checkout code
-      uses: actions/checkout@v3
-
-    - name: Cache build
-      uses: actions/cache@v3
-      with:
-        path: examples/google_benchmark/build-instrumentation
-        key: ${{ runner.os }}-build-instrumentation-${{ hashFiles('**/CMakeLists.txt', '**/examples/google_benchmark/**') }}
-
-    - name: Create build directory
-      run: mkdir -p examples/google_benchmark/build-instrumentation
-
-    - name: Build instrumentation benchmark example
-      run: |
-        cd examples/google_benchmark/build-instrumentation
-        cmake -DCODSPEED_MODE=instrumentation ..
-        make -j
-
-    - name: Run the benchmarks
-      uses: CodSpeedHQ/action@main
-      with:
-        run: examples/google_benchmark/build-instrumentation/benchmark_example
-        token: ${{ secrets.CODSPEED_TOKEN }}
-
-  walltime:
-    runs-on: codspeed-macro
-
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Cache build
+        uses: actions/cache@v3
+        with:
+          path: examples/google_benchmark_cmake/build
+          key: ${{ runner.os }}-build-${{ matrix.codspeed-mode }}-${{ hashFiles('**/CMakeLists.txt') }}
+
+      - name: Create build directory
+        run: mkdir -p examples/google_benchmark_cmake/build
+
+      - name: Build benchmark example
+        run: |
+          cd examples/google_benchmark_cmake/build
+          cmake -DCODSPEED_MODE=${{ matrix.codspeed-mode }} ..
+          make -j
+
+      - name: Run the benchmarks
+        uses: CodSpeedHQ/action@main
+        if: matrix.codspeed-mode != 'off'
+        with:
+          run: examples/google_benchmark_cmake/build/benchmark_example
+          token: ${{ secrets.CODSPEED_TOKEN }}
+
+  bazel-integration-tests:
+    strategy:
+      matrix:
+        include:
+          - codspeed-mode: "instrumentation"
+            runner: "ubuntu-latest"
+          - codspeed-mode: "walltime"
+            runner: "codspeed-macro"
+          - codspeed-mode: "off"
+            runner: "ubuntu-latest"
+    runs-on: ${{ matrix.runner }}
     steps:
-    - name: Checkout code
-      uses: actions/checkout@v3
-
-    - name: Cache build
-      uses: actions/cache@v3
-      with:
-        path: examples/google_benchmark/build-walltime
-        key: ${{ runner.os }}-build-walltime-${{ hashFiles('**/CMakeLists.txt', '**/examples/google_benchmark/**') }}
-
-    - name: Create build directory
-      run: mkdir -p examples/google_benchmark/build-walltime
-
-    - name: Build walltime benchmark example
-      run: |
-        cd examples/google_benchmark/build-walltime
-        cmake -DCODSPEED_MODE=walltime ..
-        make -j
-
-    - name: Run the benchmarks
-      uses: CodSpeedHQ/action@main
-      with:
-        run: examples/google_benchmark/build-walltime/benchmark_example
-        token: ${{ secrets.CODSPEED_TOKEN }}
-
-
-  build-no-codspeed:
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Checkout code
-      uses: actions/checkout@v3
-
-    - name: Cache build
-      uses: actions/cache@v3
-      with:
-        path: examples/google_benchmark/build-no-codspeed
-        key: ${{ runner.os }}-build-no-codspeed-${{ hashFiles('**/CMakeLists.txt', '**/examples/google_benchmark/**') }}
-
-    - name: Create build directory
-      run: mkdir -p examples/google_benchmark/build-no-codspeed
-
-    - name: Build benchmark example without codspeed
-      run: |
-        cd examples/google_benchmark/build-no-codspeed
-        cmake  ..
-        make -j
+      - uses: actions/checkout@v4
+
+      - name: Set up Bazel
+        uses: bazel-contrib/[email protected]
+        with:
+          # Avoid downloading Bazel every time.
+          bazelisk-cache: true
+          # Store build cache per workflow.
+          disk-cache: ${{ github.workflow }}
+          # Share repository cache between workflows.
+          repository-cache: true
+
+      - name: Build and run benchmarks
+        run: |
+          bazel build //examples/google_benchmark_bazel:my_benchmark --//core:codspeed_mode=${{ matrix.codspeed-mode }}
+
+      - name: Run the benchmarks
+        uses: CodSpeedHQ/action@main
+        if: matrix.codspeed-mode != 'off'
+        with:
+          run: bazel run //examples/google_benchmark_bazel:my_benchmark --//core:codspeed_mode=${{ matrix.codspeed-mode }}
+          token: ${{ secrets.CODSPEED_TOKEN }}

.gitignore

@@ -7,3 +7,6 @@ build/
 
 # Clangd cache
 .cache/
+
+# Bazel output
+/bazel-*

CONTRIBUTING.md

@@ -4,4 +4,4 @@
 
 For now, releasing is done manually, by tagging a git rev with vX.Y.Z.
 
-When releasing a new version, please make sure the [version](https://github.com/CodSpeedHQ/codspeed-cpp/blob/fix-walltime-pid/core/CMakeLists.txt#L3) is updated in the `core/CMakeLists.txt` file to match the pushed version
+When releasing a new version, please make sure the version is updated in the [`core/CMakeLists.txt`](https://github.com/CodSpeedHQ/codspeed-cpp/blob/main/core/CMakeLists.txt#L3) and [`core/BUILD`](https://github.com/CodSpeedHQ/codspeed-cpp/blob/main/core/BUILD#L4) files to match the pushed version

MODULE.bazel

@@ -0,0 +1 @@
+bazel_dep(name = "rules_cc", version = "0.0.17")

README.md

@@ -11,3 +11,7 @@ This mono-repo contains the integration libraries for using CodSpeed in C++:
 
 - [`codspeed-google-benchmark`](./google_benchmark/): Google Benchmark compatibility layer for CodSpeed
 - [`codspeed-core`](./core/): The CodSpeed core library used to integrate with Codspeed runners
+
+## Usage
+
+The library can be used with both [CMake](https://docs.codspeed.io/benchmarks/cpp#cmake) and [Bazel](https://docs.codspeed.io/benchmarks/cpp#bazel). If you need further information to integrate CodSpeed to your project, please feel free to open an issue or ask for help on our discord server.