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2026-07-13 12:08:27 +08:00

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YAML

name: DCO
on:
pull_request:
types: [opened, synchronize, reopened]
permissions:
pull-requests: write
jobs:
dco:
name: Check Signed-off-by
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
with:
repository: ${{ github.event.pull_request.head.repo.full_name }}
ref: ${{ github.event.pull_request.head.sha }}
fetch-depth: 0
- name: Report missing Signed-off-by (dry-run advisory)
shell: bash
run: |
set -euo pipefail
base_rev=$(git merge-base origin/${{ github.base_ref }} HEAD 2>/dev/null || echo "HEAD~1")
echo "✅ merge-base: $base_rev"
echo ""
bad=()
while IFS= read -r commit; do
msg=$(git log --format=%B -n1 "$commit")
if ! echo "$msg" | grep -qi "^Signed-off-by:"; then
bad+=("$commit")
fi
done < <(git rev-list "${base_rev}..HEAD")
if [ ${#bad[@]} -eq 0 ]; then
echo "✅ All commits have Signed-off-by."
exit 0
fi
echo "⚠️ Advisory — the following commit(s) are missing Signed-off-by:"
for c in "${bad[@]}"; do
echo " • $c $(git log --format=%s -n1 "$c")"
done
echo ""
echo "This check is advisory and does not block merging."
echo "Please amend commits with:"
echo " git commit --amend -s"
echo "See CONTRIBUTING.md for details."
echo ""
echo "::warning title=DCO: missing Signed-off-by::Some commits are missing Signed-off-by — amend with git commit --amend -s"
# Dry-run: always pass, but surface the warning
exit 0