Re: Getting a commit sha1 from fast-import in a remote-helper

[Mike Hommey <mh@glandium.org>]

On Tue, Nov 18, 2014 at 12:11:47PM +0900, Mike Hommey wrote:
> Oh, so `ls <dataref>` would print out what <dataref> is? That would
> definitely help, although with the trick above, I probably wouldn't
> actually need it anymore.

So, in the end, I was able to do everything with what's currently
provided by git fast-import, but one thing would probably make life
easier for me: being able to initialize a commit tree from a commit
that's not one of the direct parents.

Because the data I'm using gives diffs against possibly unrelated
commits, and because starting a tree from scratch is actually slow when
you have thousands of subdirectories, it would be easier if I could just
start from that tree I have a diff against and apply the changes.
Without this, there would be a lot of `ls` command emitting involved,
and I'm actually not sure that wouldn't be as slow as starting from
scratch (haven't implemented yet, so I can't tell). Also, I'm not sure
how I'm supposed to know how much to read back from `ls`.

Mike