cli/verify: expose latest transition on verify#2187
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This returns the
LatestTransitionobject oncontrast verifyand writes the latest transition hash to theverifydirectory. Obtaining the signature of the latest transition is a prerequisite for recovering the Coordinator config map history. The transition hash can be used duringcontrast setto disallow updates to an unknown Coordinator state.Returning the transition hash here is not strictly necessary as it can be recomputed using the manifest history already returned by
contrast verifybut this makes it easier and allows, e.g., passing a transition hash directly per command line flag duringcontrast set.We don't write the signature to the verify directory. I'm currently planning on integrating the config map recovery into the
verifysubcommand, since in this step we get everything we need to reconstruct the config map history, so there is no need for the user to see the signature.