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Re: Moves in FSFS

From: Julian Foad <julianfoad_at_btopenworld.com>
Date: Tue, 17 Sep 2013 12:12:31 +0100 (BST)

Branko Čibej wrote:
> On 17.09.2013 12:46, Philip Martin wrote:
>>  I still don't understand.  For a change like a text edit we always call
>>  make-mutable and it always gives a new id, either changing the
>>  revision-id or the copy-id.  It's not clear to me that there should be
>>  a make-mutable call before a move.
>
> The result of a move needs a new revision-id. Of course you have to make
> the node mutable before you modify it, and "move" modifies the node in
> the sense that it creates a new node-revision.

But why does "move" need to create a new node-revision of the moved node itself (assuming the node isn't lazy-copied and isn't about to be modified).  Why shouldn't it just create a new reference to the existing old node-revision?  (Of course it needs to create a new node-rev of the parent directory because the parent's list of children changes.)

- Julian
Received on 2013-09-17 13:13:27 CEST

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