Re: [RFC] Applying a graft to a tree and "rippling" the changes through

From: Yann Dirson <ydirson@altern.org>
Date: Nov 19, 2005, 14:13 UTC
Message-ID: <20051119141341.GE3393@nowhere.earth>
In-Reply-To: <20051119140404.GD3393@nowhere.earth>

On Sat, Nov 19, 2005 at 03:04:05PM +0100, Yann Dirson wrote:

Show 15 quoted lines

> Trees have an existence outside any consideration of what changes led
> to them, as shown by the fact that git trees do not reference anything
> outside them.  And it is right that, at that level, noone tells you
> how you got there - not less nor more than when you fetch a
> linux-x.y.z.tar.gz2 from kernel.org.
> 
> Then at a bit higher level, you can consider changes from a tree to a
> tree.  What you usually do when you commit a change is explaining what
> you change to the tree.  Then changes themselves are just derived from
> the trees (iow, "abstracted from" the trees), and you augment this
> information with a message explaining what you did.
> 
> Then at a still higher level, you can derive history lines from the
> individual trees and changes, and augment this information, eg. by
> signing them.

IOW,
- 1st level describes states that existed
- 2nd level describes events that occured, causing the state to change
- 3rd level describes the succession of events

and for the record, I am likely to introduce with ArcheoloGIT a 4th level, which will describe how our idea of history evolves over time.

Best regards,

-- 
Yann Dirson    <ydirson@altern.org> |
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