fix(ci): prefetch buildx attestation manifests #481
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Buildx can embed attestation manifests directly in the OCI index (vnd.docker.reference.type=attestation-manifest). In our ECR -> Workers -> R2 pull-through flow, these digests can be referenced by the index but missing from R2 if they are not requested while ECR still retains them, leading to pull failures. - Add a small helper script to extract these digests from the index - Force-fetch each digest via the live registry and warm its blobs
brandur
approved these changes
Jan 2, 2026
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Buildx can embed attestation manifests directly in the OCI index (
vnd.docker.reference.type=attestation-manifest):{ "schemaVersion": 2, "mediaType": "application/vnd.oci.image.index.v1+json", "manifests": [ { "mediaType": "application/vnd.oci.image.manifest.v1+json", "digest": "sha256:c0611027c37b396f95ad2d44428eaed21834e91ea8ee0bf7b887ff7b38cf47ab", "size": 673, "platform": { "architecture": "arm64", "os": "linux" } }, { "mediaType": "application/vnd.oci.image.manifest.v1+json", "digest": "sha256:8faa4eaef58a4f9b931d12af60bf265d96f6f2dda8e3c6a428848cdcefcf9f20", "size": 567, "annotations": { "vnd.docker.reference.digest": "sha256:c0611027c37b396f95ad2d44428eaed21834e91ea8ee0bf7b887ff7b38cf47ab", "vnd.docker.reference.type": "attestation-manifest" }, "platform": { "architecture": "unknown", "os": "unknown" } }, { "mediaType": "application/vnd.oci.image.manifest.v1+json", "digest": "sha256:ccdc5e5e3e11e2c48269f96186e6f4b762c1cddc6fe19d3f0b08c548bae50af0", "size": 673, "platform": { "architecture": "amd64", "os": "linux" } }, { "mediaType": "application/vnd.oci.image.manifest.v1+json", "digest": "sha256:bda0aad141eadb946e0754aa5459db1a4e49730a6b752562eda94a93f32035b8", "size": 567, "annotations": { "vnd.docker.reference.digest": "sha256:ccdc5e5e3e11e2c48269f96186e6f4b762c1cddc6fe19d3f0b08c548bae50af0", "vnd.docker.reference.type": "attestation-manifest" }, "platform": { "architecture": "unknown", "os": "unknown" } } ], "annotations": { "org.opencontainers.image.description": "River UI Pro is a web-based user interface for River, with pro features.", "org.opencontainers.image.licenses": "commercial", "org.opencontainers.image.source": "https://github.com/riverqueue/riverui" } }However our publication workflow was not doing a pull-through fetch of these artifacts so they aren't available on the registry. This PR fixes that by adding a small helper script to extract these digests from the index and force-fetch each digest via the live registry and warm its blobs.
I'll have to test this via a prerelease for the next version.