Check code formatting #15

	name: "Check code formatting"

	permissions:
	contents: read

	on:
	pull_request:
	branches:
	- master

	jobs:
	code_formatter:
	runs-on: ubuntu-latest
	timeout-minutes: 10

	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	ref: ${{ github.event.pull_request.head.sha }}

	- name: Checkout through merge base
	uses: rmacklin/fetch-through-merge-base@v0
	with:
	base_ref: ${{ github.event.pull_request.base.ref }}
	head_ref: ${{ github.event.pull_request.head.sha }}
	deepen_length: 500

	- name: Get changed files
	id: changed-files
	uses: tj-actions/changed-files@v39
	with:
	separator: ","
	skip_initial_fetch: true

	- name: "Listed files"
	env:
	CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
	run: \|
	echo "Formatting files:"
	echo "$CHANGED_FILES"

	- name: Install clang-format
	uses: aminya/setup-cpp@v1
	with:
	clangformat: 18.1.8

	- name: Run clang-format on changed files
	run: \|
	echo "$CHANGED_CPP_FILES" \| xargs -r clang-format-18 -i

	- name: Check for formatting changes
	run: \|
	# Check if any files were modified by clang-format
	if [[ `git status --porcelain` ]]; then
	echo "Code is not formatted. Please run clang-format."
	git diff
	exit 1
	fi

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