Re: [PATCH v2 4/4] bundle v3: the beginning

On Tue, Jun 07, 2016 at 10:46:07AM +0200, Christian Couder wrote:

The high level overview of the patch series I would like to send
really soon now could go like this:

---
Git can store its objects only in the form of loose objects in
separate files or packed objects in a pack file.
To be able to better handle some kind of objects, for example big
blobs, it would be nice if Git could store its objects in other object
databases (ODB).

To do that, this patch series makes it possible to register commands,
using "odb.<odbname>.command" config variables, to access external
ODBs. Each specified command will then be called the following ways:

  - "<command> have": the command should output the sha1, size and
type of all the objects the external ODB contains, one object per
line.
  - "<command> get <sha1>": the command should then read from the
external ODB the content of the object corresponding to <sha1> and
output it on stdout.
  - "<command> put <sha1> <size> <type>": the command should then read
from stdin an object and store it in the external ODB.

(disclaimer: I didn't look at the patch series)

Does this mean you're going to fork/exec() a new <command> for each of
these? It would probably be better if it was "batched", where the
executable is invoked once and the commands are passed to its stdin.

Mike