[MERGE] add stop_rule to Branch.iter_merge_sorted_revisions()

[John Arbash Meinel]

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Ian Clatworthy wrote:

...

>> In this specific case I was thinking:
>>
>> parents = get_parent_map([revision])[revision]
>>
>> Where the length of parents can certainly be > 1.
> 
> Thinking out loud, I wonder if stopping at any parent ought to be explicitly
> supported, i.e. instead of having "with-merges" we had "include-until-parent"?
> That way we'd be matching against revision-ids instead of relying on any
> nuances of the depth calculation algorithm. I'm pretty sure
> include-until-parent makes with-merges redundant doesn't it?
> 
> Ian C.
> 

I would think so, and yes, I would probably prefer that as well. Though
I haven't really worked out the specifics to be positive on this.

John
=:->
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