[darcs-users] Naming consistency between darcs and other DVCSs

[Dan Pascu]

On 16 Jul 2009, at 05:14, Trent W. Buck wrote:

> "Stephen J. Turnbull" <stephen at xemacs.org> writes:
>
>> "rollback" has a precise meaning in database theory.  It means to
>> undo the last transaction (possibly incomplete) in the history.  IMO
>> Mercurial uses this correctly, Darcs does not.
>
> Erm, in Darcs 2 rollback records a new inverse patch.  That is, it's
> something like
>
>    darcs diff -p foo | patch -p1 -R
>    darcs record -m 'rollback foo'
>
> I would have thought that a rolled-back transaction (in database  
> terms)
> is closer to obliterate, since the end result is that you have no  
> record

Actually is the equivalent of unrecord. In a database you rollback an  
unfinished/unsuccessful operation.

> of that transcation, rather than X + -X = 0.  Admittedly, IANADBA.
>
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--
Dan