ci: Generate and push provenance attestations for charts #564
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Description
Closes #565.
Use actions/attest-build-provenance to generate and upload the provenance attestation as an OCI artifact layer.
Since we need the digest of each helm chart OCI artifact so we can push the attestation, unroll the
for helm push
that existed before. Decided to duplicate those bash scripts instead of creating a new script and makefile target because they basically set theGITHUB_ENV
vars and callhelm push
andcosign
with them.Test
Successful run: https://github.com/viccuad/helm-charts/actions/runs/11484306246/job/31961771613
https://github.com/viccuad/helm-charts/attestations
Additional Information
Tradeoff
Potential improvement