[feature-request] command to revert to last common change between bundles

[jellelicht]

From the sqitch checkout docs:

More specifically, the checkout command compares the plan in the current branch to that in the branch to check out, identifies the last common changes between them, reverts to that change as if sqitch revert was called (unless there have been no changes deployed since that change), checks out the new branch, and then deploys all changes as if sqitch deploy had been called.

Would it be possible to add a similar command, but 'between' two generated bundles created with sqitch bundle?

[theory]

Sure, a lot of the same logic could be used for that purpose; would just change directories instead of checking out a branch.

Anyone got the tuits to work on that?