mirror of https://github.com/pulumi/pulumi.git
0bec028ad7
An important precondition of Pulumi state snapshots is that there are no *dangling references* -- that is, references to resources which do not exist in the snapshot. Snapshots which have such references will yield snapshot integrity errors when `Snapshot.VerifyIntegrity` is called. This commit introduces the `Snapshot.Prune` method, which walks a snapshot and removes dangling references. The snapshot is assumed to be toplogically sorted and URN changes due to dangling parent references are propagated appropriately. In combination with the recently added `Topsort` method, this should set us in good stead for introducing a `state repair` command to automatically clean up many kinds of invalid snapshots. |
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