Michael Haggerty <mhag...@alum.mit.edu> writes:

> On 05/03/2013 08:23 PM, Felipe Contreras wrote:
>> On Fri, May 3, 2013 at 12:56 PM, Thomas Rast <tr...@inf.ethz.ch> wrote:
>>> Felipe Contreras <felipe.contre...@gmail.com> writes:
>>> How do we know that this doesn't break any users of fast-import?  Your
>>> comment isn't very reassuring:
>>>> the vast majority of them will never be used again
>>> So what's with the minority?
>> Actually I don't think there's any minority. If the client program
>> doesn't store blobs, the blob marks are not used anyway. So there's no
>> change.
> I haven't been following this conversation in detail, but your proposed
> change sounds like something that would break cvs2git [1].  Let me
> explain what cvs2git does and why:
> CVS stores all of the revisions of a single file in a single filename,v
> file in rcsfile(5) format.  The revisions are stored as deltas ordered
> so that a single revision can be reconstructed from a single serial read
> of the file.
> cvs2git reads each of these files once, reconstructing *all* of the
> revisions for a file in a single go.  It then pours them into a
> git-fast-import stream as blobs and sets a mark on each blob.
> Only much later in the conversion does it have enough information to
> reconstruct tree-wide commits.  At that time it outputs git-fast-import
> data (to a second file) defining the git commits and their ancestry.
> The contents are defined by referring to the marks of blobs from the
> first git-fast-import stream file.
> This strategy speeds up the conversion *enormously*.
> So if I understand correctly that you are proposing to stop allowing
> marks on blob objects to be set and/or referred to later, then I object
> vociferously.

The proposed patch wants to stop writing marks (in --export-marks) for
anything but commits.  Does cvs2git depend on that?  I.e., are you using
two separate fast-import processes for the blob and tree/commit phases
you describe above?

Thomas Rast
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to