download attestation: support --platform flag #2980
Merged
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Similar to #2356
Summary
cosign download sbom
accepts a--platform
flag, which chooses a platform when the provided image ref is a multi-arch image. This change adds the same support tocosign download attestation
, using the same code and semantics.Before:
(this could only tell you the attestation of the multi-platform index, which contains its sub-images)
After:
(this can tell you the attested contents of a specific image within the multi-platform index)
Release Note
--platform
flag tocosign download attestation
Documentation
--help
output and generated docs include this new flag.