[CI] Add a clang-tidy build

.clang-tidy

@@ -58,8 +58,8 @@ Checks: >
 #  -modernize-use-using
 
 # Use existing clang-format for formatting the code
-# FormatStyle: 'file'
-
+FormatStyle: 'file'
+ExcludeHeaderFilterRegex: '.*(third_party|opentracing-shim).*'
 # TODO: include checks: readability, cppcoreguidelines, modernize , google-readability-namespace-comments, google-readability-avoid-underscore-in-googletest-name, performance-move-const-arg
 
 

.github/workflows/clang-tidy.yaml

@@ -0,0 +1,79 @@
+name: clang-tidy
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  clang-tidy:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Setup Environment
+        env:
+          PROTOBUF_VERSION: '23.3'
+          ABSEIL_CPP_VERSION: '20230125.3'
+          CXX_STANDARD: '14'
+        run: |
+          sudo apt update -y
+          sudo apt install -y --no-install-recommends --no-install-suggests \
+          build-essential \
+          iwyu \
+          cmake \
+          ninja-build \
+          libssl-dev \
+          libcurl4-openssl-dev \
+          libprotobuf-dev \
+          protobuf-compiler \
+          libgmock-dev \
+          libgtest-dev \
+          libbenchmark-dev
+#          sudo -E ./ci/install_abseil.sh
+#          sudo -E ./ci/setup_grpc.sh -m -p protobuf -p abseil-cpp
+
+      - name: Prepare CMake
+        run: |
+          TOPDIR=$(pwd)
+          mkdir -p build && cd build
+          echo "Running cmake..."
+          CC="clang" CXX="clang++" cmake .. \
+          -DCMAKE_CXX_STANDARD=14 \
+          -DWITH_STL=CXX14 \
+          -DWITH_OTLP_HTTP=ON \
+          -DWITH_OTLP_FILE=ON \
+          -DWITH_PROMETHEUS=ON \
+          -DWITH_ZIPKIN=ON \
+          -DWITH_ELASTICSEARCH=ON \
+          -DWITH_OTLP_HTTP_COMPRESSION=ON \
+          -DWITH_EXAMPLES=ON \
+          -DWITH_EXAMPLES_HTTP=ON \
+          -DBUILD_W3CTRACECONTEXT_TEST=ON \
+          -DWITH_METRICS_EXEMPLAR_PREVIEW=ON \
+          -DWITH_ASYNC_EXPORT_PREVIEW=ON \
+          -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
+          -DCMAKE_CXX_CLANG_TIDY="clang-tidy-18"
+#                         -DWITH_ABSEIL=ON \
+#                    -DWITH_OTLP_GRPC=ON \
+#                    -DWITH_OTLP_GRPC_SSL_MTLS_PREVIEW=ON \
+
+      - name: clang-tidy
+        run: |
+          cd build
+          make 2>&1 | tee -a clang-tidy.log
+
+      - uses: actions/upload-artifact@v4
+        if: success() || failure()
+        with:
+          name: Logs (clang-tidy)
+          path: ./build/*.log
+
+      - name: count warnings
+        run: |
+          cd build
+          COUNT=`grep -c "warning:" clang-tidy.log`
+          echo "clang-tidy reported ${COUNT} warning(s)"

CHANGELOG.md

@@ -15,6 +15,9 @@ Increment the:
 
 ## [Unreleased]
 
+* [CI] Added clang-tidy to the CI pipeline, which outputs
+the number of warnings and generates a log file containing the
+details of these warnings [#2051](https://github.com/open-telemetry/opentelemetry-cpp/issues/2051)
 * [SECURITY] Remove OTLP HTTP support for TLS 1.0 and TLS 1.1,
   require TLS 1.2 or better
   [#2721](https://github.com/open-telemetry/opentelemetry-cpp/pull/2721)