Re: [3/5] Add http-pull

[tony.luck@intel.com]

On Wed, 20 Apr 2005, Brad Roberts wrote:
> How about fetching in the inverse order.  Ie, deepest parents up towards
> current.  With that method the repository is always self consistent, even
> if not yet current.

Daniel Barkalow replied:
> You don't know the deepest parents to fetch until you've read everything
> more recent, since the history you'd have to walk is the history you're
> downloading.

You "just" need to defer adding tree/commit objects to the repository until
after you have inserted all objects on which they depend.  That's what my
"wget" based version does ... it's very crude, in that it loads all tree
& commit objects into a temporary repository (.gittmp) ... since you can
only use "cat-file" and "ls-tree" on things if they live in objects/xx/xxx..xxx
The blobs can go directly into the real repo (but to be really safe you'd
have to ensure that the whole blob had been pulled from the network before
inserting it ... it's probably a good move to validate everything that you
pull from the outside world too).

-Tony