Reject unformatted PRs #7

	name: Clang Format Check

	on:
	pull_request:
	types: [opened, synchronize, reopened]

	jobs:
	clang-format-check:
	name: Check PR formatting with clang-format-15
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0 # Need full history to compare with main branch

	- name: Install clang-format-15
	run: \|
	sudo apt-get install -y clang-format-15

	- name: Fetch main branch
	run: \|
	git fetch origin main:main

	- name: Check formatting
	run: \|
	echo "Running git-clang-format-15 to check for formatting issues..."
	echo "Comparing against main branch..."

	# Create a temporary file for the diff and ensure cleanup
	DIFF_FILE="$(mktemp)"
	trap 'rm -f "$DIFF_FILE"' EXIT

	# Run git-clang-format and capture status safely under set -e
	if git-clang-format-15 --diff main --binary clang-format-15 > "$DIFF_FILE"; then
	status=0
	else
	status=$?
	fi
	if [ "$status" -eq 0 ]; then
	echo "✅ Code is properly formatted!"
	exit 0
	elif [ "$status" -eq 1 ]; then
	echo "❌ Code formatting issues detected!"
	echo ""
	echo "The following changes would be made by clang-format-15:"
	echo "=================================================="
	cat "$DIFF_FILE"
	echo "=================================================="
	echo ""
	echo "Please run the following command locally on your feature branch and commit the changes:"
	echo " git-clang-format-15 main --binary clang-format-15"
	exit 1
	else
	echo "❌ git-clang-format-15 failed with exit code $status"
	echo "Output (if any):"
	cat "$DIFF_FILE"
	exit 1
	fi

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