[SVNMERGE][PATCH] handle -r X-Y, where X > Y

[Madan U Sreenivasan]

On Tue, 16 May 2006 11:23:52 +0530, Giovanni Bajo <rasky at develer.com>  
wrote:

> Madan U Sreenivasan <madan at collab.net> wrote:
>
>>> "svn merge" accepts the reversed order with a different semantic
>>> (reversed merge).
>>
>> I only know that 'svn merge' understands a reverse merge if you
>> simply say -r 45-30. Am sorry, could you explain this different
>> semantic?
>
> "svn merge -r45:30" is the exact reverse of "svn merge -r30:45".

That is exactly why I would expect a svnmerge user to give -r 45-30  
instead of -r 30-45 (I did that myself when writing the tests).


> Basically, the
> former is a rollback command. Also "svn diff -r45:30" produces the  
> reverse
> patch. So there is precedence within SVN that X:Y (with X>Y) means the  
> reversed
> set of changes. Generically, X:Y means "the set of changes which can be  
> applied
> to revision X to obtain revision Y".

I think svnmerge shouldnt imitate that behavior. esp since we are planning  
two seperate commands merge/rollback which decide the direction of the  
merge. so the order  of the revision range becomes redundant.

>
> This is why I'm hesitant on having svnmerge accept reversed ranges and
> normalize them.

I can understand. But seriously, this is something thats waiting to be  
done... just a matter of time before people understand that X-Y and Y-X  
can be used interchangeably in svnmerge.

Regards,
Madan.