ci(CheckSignOff.yml): add DCO check #1

	name: Check Sign-off

	on:
	pull_request:
	types: [opened, synchronize, reopened]
	push:
	branches: [ main ] # 可根据需要指定分支，例如 "main", "master"

	jobs:
	check-signoff:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0 # 获取所有历史和分支，以便正确比较

	- name: Check for Sign-off
	run: \|
	check_commit() {
	local commit_hash=$1
	local commit_msg=$(git show -s --format=%B "$commit_hash")
	if ! echo "$commit_msg" \| grep -q "Signed-off-by:"; then
	echo "提交 $commit_hash 缺少 Signed-off-by 签署。"
	echo "请使用 'git commit -s' 添加签署，或手动在提交信息中包含 'Signed-off-by: Your Name <your.email@example.com>'。"
	return 1
	fi
	}

	if [ "${{ github.event_name }}" = "push" ]; then
	if [ "${{ github.event.before }}" = "0000000000000000000000000000000000000000" ]; then
	COMMITS_TO_CHECK=$(git log --oneline --format=%H ${{ github.event.after }})
	else
	COMMITS_TO_CHECK=$(git log --oneline --format=%H ${{ github.event.before }}..${{ github.event.after }})
	fi
	else
	COMMITS_TO_CHECK=$(git log --oneline --format=%H ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }})
	fi

	if [ -z "$COMMITS_TO_CHECK" ]; then
	exit 0
	fi

	echo "$COMMITS_TO_CHECK"

	HAS_ERROR=0
	for commit in $COMMITS_TO_CHECK; do
	if ! check_commit "$commit"; then
	HAS_ERROR=1
	fi
	done

	if [ $HAS_ERROR -eq 1 ]; then
	echo "::error::部分提交缺少开发者签署认证(DCO)。"
	exit 1
	else
	echo "所有提交均已签署。"
	fi

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