Re: history of ditto (was: First timer: Finder Copy vs. cp)
Re: history of ditto (was: First timer: Finder Copy vs. cp)
- Subject: Re: history of ditto (was: First timer: Finder Copy vs. cp)
- From: Jeffrey Ellis <email@hidden>
- Date: Wed, 09 Aug 2006 16:50:26 -0700
- Thread-topic: history of ditto (was: First timer: Finder Copy vs. cp)
on 8/9/06 4:27 PM, Godfrey van der Linden at email@hidden wrote:
> ditto is about very efficient reproduction of a directory tree from
> one place onto another possibly partially populated tree. The key
> word is efficient, i.e. fast. It is very highly optimised and is
> used in the Apple build procedure, you may have noticed that the open
> source is in several projects. Apple builds an image by, building
> each of the some 1500 projects, into a directory tree known as a
> project root. Then they 'ditto' the project root onto a image root,
> adding layer after layer of projects until the final image is made.
>
> Finally ditto was written when the only reliable way of copying file
> meta-data was to use tar c dir | (cd target; tar x), which is what it
> is designed to emulate.
>
> Godfrey
>
> On 10/08/2006, at 09:16 , Jeffrey Ellis wrote:
>
>> Okay, so I guess this is my next question. If cp does everything,
>> why would
>> anyone use ditto? I always thought that was used because of it's
>> ability to
>> copy resource forks.
Hi, Godfrey--
I actually just saw Finlay Dobbie's post to darwin-dev a couple of years ago
saying ditto is part of BOM which is closed. Do you actually know where to
find the ditto source? (Or for that matter cp?)
Thanks :)
All My Best,
Jeffrey
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