Add GitHub action for IWYU #17

	name: IWYU Analysis

	on: [push, pull_request, workflow_dispatch]


	jobs:
	build:
	runs-on: ubuntu-latest
	permissions:
	contents: write

	steps:
	- uses: actions/checkout@v4

	- name: Setup cmake
	uses: jwlawson/actions-setup-cmake@v2
	with:
	cmake-version: '3.22.x'

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.10'

	- name: Install python dependencies
	run: \|
	python -m pip install --upgrade pip

	- name: Install iwyu
	run: \|
	sudo apt-get update
	sudo apt-get install -y iwyu

	- name: Register problem matcher
	run: echo "::add-matcher::./.github/problem-matcher.json"

	- name: Export CXXFLAGS

	#Since Clang 17 is installed in usr/bin, it will search for built-ins in /usr/lib/clang/17/include.
	#The purpose of this step is to help the clang toolchain used by IWYU to locate the correct system
	#header directories.

	run: \|
	cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON executables/referenceApp
	export CXXFLAGS="-isystem /usr/lib/llvm-17/lib/clang/17/include/"
	echo "done exporting"
	python3 iwyu_tool.py -p compile_commands.json 2>&1 > iwyu_output.txt \| tee iwyu_output.txt
	echo "Output in iwyu_output.txt"

	- name: Print IWYU output
	run: cat iwyu_output.txt

	- name: Unregister problem matcher
	if: always()
	run: echo "::remove-matcher owner=iwyu-matcher::"

	- name: Upload IWYU output
	uses: actions/upload-artifact@v4
	with:
	name: iwyu_output
	path: iwyu_output.txt

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