dco.yml

name: DCO
on:
  pull_request:

jobs:
  dco:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
        with:
          fetch-depth: 0
      - name: Check DCO sign-off
        run: |
          BASE=${{ github.event.pull_request.base.sha }}
          HEAD=${{ github.event.pull_request.head.sha }}
          MISSING=$(git log --format='%H %s' ${BASE}..${HEAD} | while read hash msg; do
            if ! git log -1 --format='%b' $hash | grep -qi 'Signed-off-by:'; then
              echo "$hash $msg"
            fi
          done)
          if [ -n "$MISSING" ]; then
            echo "The following commits are missing DCO sign-off:"
            echo "$MISSING"
            echo ""
            echo "Add sign-off with: git commit --amend -s"
            exit 1
          fi