Re: Core and Not-So Core

[Jon Seymour <jon.seymour@gmail.com>]

On 5/11/05, Petr Baudis <pasky@ucw.cz> wrote:
> Dear diary, on Wed, May 11, 2005 at 01:05:55AM CEST, I got a letter
> where Jon Seymour <jon.seymour@gmail.com> told me that...
> >
> > I guess I agree it is somewhat nonsensical if one considers the
> > current git toolset as a collection of programs - the exercise now
> > might simply reduce to classifying git tools as
> > index-using/non-index-using and nothing more. However, it might be
> > worth keeping in mind when/if the "libification" of git happens so
> > that there is a clean separation of layers in the API between the
> > repository API and index/cache/workspace API.
> 
> In that case the repository API's input/output is data structure
> equivalent to the index, and workspace API's input/output is the index
> too. That is what it really is - and it is kept on the disk only since
> the commands are invoked separately so it needs to keep the state around
> somewhere.
> 

Not sure I agree...

The repository API would contain functionality equivalent to cat-file,
ls-tree, most of fsck-cache, rev-list, rev-tree, diff-tree, most of
the transport code - things that don't involve use of the index.

The workspace API would contain read-tree, write-tree, commit-tree,
etc - things that do involve use of the the index.

jon.