[submodule][master] Update submodule dhcpmon to the latest HEAD automatically #549

	name: Protect certain files to avoid further changes

	on:
	push:
	branches:
	- 'master'
	- '202[2-9][0-9][0-9]'
	pull_request:
	branches:
	- 'master'
	- '202[2-9][0-9][0-9]'

	jobs:
	check-file:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Fetch base branch
	run: \|
	git fetch origin ${GITHUB_BASE_REF}

	- name: Check protected files
	run: \|
	echo "Starting file check step"
	protected_files=('src/sonic-config-engine/minigraph.py' 'files/build_templates/init_cfg.json.j2')
	base_branch=$(git rev-parse origin/${GITHUB_BASE_REF})

	for protected_file in "${protected_files[@]}"; do
	echo "Checking ${protected_file}"
	if git diff --name-only $base_branch \| grep -q "^${protected_file}\$"; then
	echo "Error: You are trying to modify ${protected_file}, which is protected."
	exit 1
	fi
	done
	echo "No changes detected in protected files"

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