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ci: attest alpha releases and publish bundle as release asset #22

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arcaven merged 1 commit into from
Jul 17, 2026
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ci: attest alpha releases and publish bundle as release asset #22

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49 changes: 49 additions & 0 deletions .github/workflows/ci.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -428,3 +428,52 @@ jobs:
git add Formula/switchboard.rb
git diff --cached --quiet || git commit -m "Update switchboard to $VERSION"
git push
attest:
name: Attest Alpha Release Provenance
needs: [build-binaries, sign-and-notarize, alpha-release]
# Runs after alpha-release (the last asset mutation on the alpha channel)
# so attestations cover the FINAL bytes that ship. Tolerates a skipped
# sign-and-notarize (SIGNING_ENABLED != 'true').
if: |
!cancelled() &&
needs.build-binaries.result == 'success' &&
needs.alpha-release.result == 'success' &&
(needs.sign-and-notarize.result == 'success' || needs.sign-and-notarize.result == 'skipped')
permissions:
contents: write
id-token: write
attestations: write
runs-on: ubuntu-latest
steps:
- name: Harden the runner (Audit all outbound calls)
uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
with:
egress-policy: audit

- name: Download final release assets
env:
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
run: |
mkdir -p release-assets
gh release download "${{ needs.build-binaries.outputs.tag }}" \
--repo "${{ github.repository }}" \
--dir release-assets
echo "Assets to be attested:"
ls -la release-assets/

- name: Attest release artifacts
id: attest
uses: actions/attest-build-provenance@a2bbfa25375fe432b6a289bc6b6cd05ecd0c4c32 # v4.1.0
with:
subject-path: 'release-assets/*'

- name: Upload attestation bundle to release
env:
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
run: |
# Publish the Sigstore bundle as a release asset so external
# scanners (e.g. OSSF Scorecard Signed-Releases) can see it; the
# GitHub attestation store is not visible to them.
cp "${{ steps.attest.outputs.bundle-path }}" attestations.sigstore.json
gh release upload "${{ needs.build-binaries.outputs.tag }}" attestations.sigstore.json \
--repo "${{ github.repository }}" --clobber
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