Require Developer Certificate of Origin (DCO) #5

	name: DCO Check

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

	jobs:
	dco:
	name: Check Signed-off-by in commits
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Fetch base branch
	run: git fetch origin ${{ github.base_ref }}

	- name: Check commits for Signed-off-by
	run: \|
	git log --pretty=format:"%H %P %s%n%b%n==END==" origin/${{ github.base_ref }}...HEAD \|
	awk '
	BEGIN { commit = ""; parent_count = 0; has_signed_off = 0; }
	/^[0-9a-f]{40} / {
	commit = $1;
	n = split($0, parts, " ");
	parent_count = n - 2;
	next;
	}
	/==END==/ {
	if (parent_count < 2 && !has_signed_off) {
	print "Commit " commit " is missing Signed-off-by";
	exit 1;
	}
	commit = "";
	parent_count = 0;
	has_signed_off = 0;
	next;
	}
	/Signed-off-by:/ { has_signed_off = 1; }
	'

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