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From Peter Samuelson <pe...@p12n.org>
Subject Re: Subversion in 2010
Date Tue, 05 Jan 2010 20:18:25 GMT

[Stefan Sperling]
> Subversion needs to amend its data model to provide copy-to
> information, to complement the current copy-from information.
[...]
> This is easier said than done. It implies repository format changes.
> We'd need to a way to modify old revisions to store this information
> because the copy-to data needs to sit at the copy *source*.

Huh ... this part I don't get.  Surely the copy-to information would
live in the same revision where the copy (or rename) actually happens,
right?  That does not require rewriting old data.

I understand that this does not offer an efficient way to get _all_ the
places a node has been copied to, but in the case you're talking about,
we only care about the rename target.  If the wc can enforce that both
sides of a rename be committed at the same time, the copy-to will
always be in the same revision as the delete.

Or, to put it another way, if the copy + delete are in separate
revisions ... then for tree conflict purposes, we can assume that the
delete is just a delete.
-- 
Peter Samuelson | org-tld!p12n!peter | http://p12n.org/

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