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Myasnikov Daniil
e85482bacc
Promote RC refuses to promote a release whose target base cannot verify
the packages candidate. It checks five markers on the base branch before
its first registry write and fails closed with "Target base
'release-1.6' lacks '<path>'". This branch satisfied one of the five
(hack/lib/image-refs.sh), so the next patch release off release-1.6
could not be dispatched at all.
Add the two halves the base has to carry:
* hack/verify-promoted-packages.sh and hack/lib/promoted-packages.sh,
byte-identical to main. The verifier pulls the candidate by its
committed digest and proves it matches the merge tree apart from the
artifact's impossible self-reference, that promotion rewrote every
version-line image tag, and that the container repo@digest set is
unchanged from the rc artifact.
* the two jobs that run it. verify-release-candidate in
pull-requests.yaml checks GitHub's prospective merge tree so a
packages/ edit pushed to the promote PR shows up as a failed check,
and a Verify stable packages candidate step in the finalize job of
pull-requests-release.yaml repeats it against the real merge commit.
Position is the whole point of the finalize half: it runs before the
write-once stable tag, the draft-release publish and the retag, so a bad
candidate is refused while nothing stable-named exists yet. The former
"Set up toolchain (skopeo, yq, helm)" and "Login to registry (GHCR)"
steps moved up with it and are no longer duplicated later in the job;
the toolchain now also installs flux and pins yq by version and sha256,
because an irreversible step must not depend on whatever
releases/latest/download resolves to today.
verify-release-candidate is keyed on the promote PR's author and its
head-branch shape rather than on the `release` label main matches. This
branch's on.pull_request.types has no `labeled` event, and the label is
applied about a second after the PR opens (a separate call in
gh pr create), so the `opened` payload carries no labels and a
label-keyed guard would never fire here.
.release-tooling is gitignored, matching main, so the trusted-base
checkout can never be staged.
Signed-off-by: Myasnikov Daniil <myasnikovdaniil2001@gmail.com>