some comments on bazaar-ng

[Martin Pool]

On Tue, 2005-04-12 at 18:20 +0200, denys.duchier at lifl.fr wrote:
> On the bazzar-ng web site, you suggested to send comments to you, so here goes:
> 
> The available documentation strongly suggests that your perspective is that
> objects (e.g. files and directories) are named.  This, I find very odd.
> 
> My own intuitions about an archive is that it is a mapping from ids to objects,
> where each object is basically a pair (type,data).  For files the data is just a
> sequence of bytes, while for directories it is a mapping from names to ids.
> (there is a distinguished root directory object).
> 
> In this view, objects do not have names.  In fact, it is easy to represent hard
> links since these are simply multiple entries in directories for the same object
> id.

Hi, 

Thanks for commenting.

It depends what you mean by "names".  The filename for a particular file
in a revision is defined by the directory that contains in it a
particular revision and is indeed a quite transient thing.

Objects do have a long-term ID, which is used to manage renames etc.

What I suggest you do is have a look in the .bzr directory of a tree to
get a good sense of how everything connects up.

> A directory delta is a set of deletions/additions of entries (i.e. mappings from
> name to id).

Yes.

> With this approach, there is also no reason to distinguish moves from renames.
> They are exactly the same (but perhaps I am overlooking some practical
> consideration).

There is no technical distinction.  It may be useful to make a
distinction in the user interface; see the list thread about this last
week.

-- 
Martin

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