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Merged
hyperpolymath merged 1 commit into from
Jun 25, 2026
Merged

feat(ci): attest build provenance #287

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31 changes: 31 additions & 0 deletions .github/workflows/ghcr-publish.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -65,10 +65,41 @@ jobs:
sudo nerdctl build -f .containerization/Containerfile.full -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:full .

- name: Push images
id: push
run: |
sudo nerdctl push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}
sudo nerdctl push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
sudo nerdctl push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:full
# nerdctl push has no --digestfile, so read the real sha256 of each
# pushed image back from the registry with skopeo (pre-installed on
# ubuntu-latest). The minimal (:sha/:latest) and :full images are
# distinct artifacts, so each gets its own attestation.
MIN_DIGEST="$(skopeo inspect --format '{{.Digest}}' \
--creds "${{ github.actor }}:${{ secrets.GITHUB_TOKEN }}" \
docker://${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }})"
FULL_DIGEST="$(skopeo inspect --format '{{.Digest}}' \
--creds "${{ github.actor }}:${{ secrets.GITHUB_TOKEN }}" \
docker://${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:full)"
echo "min_digest=$MIN_DIGEST" >> "$GITHUB_OUTPUT"
echo "full_digest=$FULL_DIGEST" >> "$GITHUB_OUTPUT"

# GitHub native artifact attestation (build provenance) for the pushed
# images. Verify with:
# gh attest verify oci://ghcr.io/${{ github.repository }}:<tag> \
# --repo ${{ github.repository }}
- name: Attest container provenance (minimal image)
uses: actions/attest-build-provenance@e8998f949152b193b063cb0ec769d69d929409be # v2
with:
subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
subject-digest: ${{ steps.push.outputs.min_digest }}
push-to-registry: true

- name: Attest container provenance (full image)
uses: actions/attest-build-provenance@e8998f949152b193b063cb0ec769d69d929409be # v2
with:
subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
subject-digest: ${{ steps.push.outputs.full_digest }}
push-to-registry: true

- name: Tag release version
if: github.event_name == 'release'
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