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Re: reverse-merge broken?

From: Kamesh Jayachandran <kamesh_at_collab.net>
Date: 2007-10-18 16:35:20 CEST

Jack,

Do you have any mergeinfo on a target from the corresponding merge
source? Then only the 'avoid repeat reverse merge code kicks in' and
hence no reverse merge.

Probably we may need '--merge-insensitive' or '-G' to support repeat
reverse merge.

With regards
Kamesh Jayachandran

Kamesh Jayachandran wrote:
> Jack,
> Yes it is broken since the early days of merge tracking which I
> uncovered yesterday.
>
> Issue 2973 takes care of that.
>
> The cause of the failure is,
>
> We try to do reverse merge only if there was a forward merge in the
> past.(As an attempt to avoid repeat reverse merging I hope!!).
>
> This makes me to think 'If we don't track reverse merge why we should
> avoid repeat reverse merge'.
>
> Attaching the patch, merge tests 67 alone fails with this.
>
> Thanks.
> With regards
> Kamesh Jayachandran
>
> Jack Repenning wrote:
>> Is this wrong? Or have I just somehow forgotten how reverse merges
>> should work?
>>
>> % svn merge some://url/to/some/branch
>> (changes happen)
>> % svn ci -m"check the merge in"
>> (some changes get committed)
>> % svn up
>> At revision 17.
>> % svn merge -c-17
>> --- Reverse-merging r17 into '.':
>> (but nothing else!)
>> % svn stat
>> (nothing)
>>
>> Shouldn't that merge command undo the changes that went into revision
>> 17, leaving me with local mods (matching what I had back at r16,
>> before the merge and commit)?
>>
>> I'm looking at a private build of r27129. (OS X, if you want to
>> care). The repository was created, and has only been touched by,
>> this same build (it's a tiny demo repo I set up for, well, a demo --
>> just contains the greek tree).
>>
>> Happy to provide a detailed reproduction script, dump of the
>> repository at the outset, and all that, but thought I'd confirm that
>> my head's on straight first.
>>
>> -==-
>> Jack Repenning
>> Chief Technology Officer
>> CollabNet, Inc.
>> 8000 Marina Boulevard, Suite 600
>> Brisbane, California 94005
>> office: +1 650.228.2562
>> mobile: +1 408.835.8090
>> raindance: +1 877.326.2337, x844.7461
>> aim: jackrepenning
>> skype: jrepenning
>>
>>
>>
>>
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Received on Thu Oct 18 16:35:25 2007

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