add formatting check only on changed lines #34

	name: clang-format-check

	on:
	pull_request:
	types: [opened, synchronize]
	branches:
	- main
	workflow_dispatch:

	jobs:
	format-check:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

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

	- name: Download clang-format-diff.py
	run: \|
	wget https://raw.githubusercontent.com/llvm/llvm-project/main/clang/tools/clang-format/clang-format-diff.py
	chmod +x clang-format-diff.py

	#run formatter inline
	- name: Format changed lines
	id: formatstep
	run: \|
	# Format only the changed lines using clang-format-diff.py
	git diff -U0 --no-color HEAD \| python3 clang-format-diff.py -p1 -i

	# check if differences found after formatting
	- name: Check formatting needed
	id: diffstep
	run: \|
	if ! git diff --exit-code; then
	echo "Formatting issues found!. Formatted changes:"
	git diff
	exit 1
	fi

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