[RFC] uncommit and pull --overwrite emit merge directives?

[Aaron Bentley]

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Hi all,

uncommit and pull --overwrite don't really provide an option to undo.
However, we now have a way of pulling to a stored revision-id:
merge-directives.

So if pull --overwrite emitted a merge directive named "undo-overwrite",
then pull --overwrite undo-overwrite would restore the tree to the state
it was in before the first pull --overwrite.

Alternatively, we could hide the directives in the branch directory, and
provide pull --undo and uncommit --undo.

Thoughts?

Aaron
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