add iwyu install script and update the ci job

Author: dbarker

.github/workflows/iwyu.yml

@@ -28,22 +28,23 @@ jobs:
           sudo apt update -y
           sudo apt install -y --no-install-recommends --no-install-suggests \
             build-essential \
-            iwyu \
             ninja-build \
             libssl-dev \
             libcurl4-openssl-dev \
+            libabsl-dev \
             libprotobuf-dev \
+            libgrpc++-dev \
             protobuf-compiler \
+            protobuf-compiler-grpc \
             libgmock-dev \
             libgtest-dev \
-            libbenchmark-dev
+            libbenchmark-dev \
+            llvm-dev \
+            libclang-dev
           sudo ./ci/setup_cmake.sh
-
-
-      - name: setup grpc
+      - name: Install include-what-you-use
         run: |
-          sudo ./ci/setup_grpc.sh
-
+          sudo ./ci/install_iwyu.sh
       - name: Prepare CMake
         run: |
           TOPDIR=`pwd`

ci/install_iwyu.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Copyright The OpenTelemetry Authors
+# SPDX-License-Identifier: Apache-2.0
+
+set -e
+
+INSTALL_PREFIX="/usr/local"
+
+LLVM_VERSION=$(llvm-config --version 2>/dev/null | cut -d. -f1)
+
+if [ -z "$LLVM_VERSION" ]; then
+    echo "Error: LLVM not found. Exiting."
+    exit 1
+fi
+
+echo "LLVM_VERSION=$LLVM_VERSION"
+echo "Installing IWYU..."
+
+git clone --depth 1 --branch clang_$LLVM_VERSION https://github.com/include-what-you-use/include-what-you-use.git
+cd include-what-you-use
+mkdir -p build
+cd build
+
+cmake -DCMAKE_PREFIX_PATH=/usr/lib/llvm-$LLVM_VERSION -DCMAKE_INSTALL_PREFIX=$INSTALL_PREFIX ..
+make -j$(nproc)
+make install
+
+echo "IWYU install complete. Verifying installation..."
+include-what-you-use --version