Felipe Contreras wrote:
> On Sat, May 11, 2013 at 7:29 AM, Andrey Borzenkov <arvidj...@gmail.com> wrote:
> > I noticed that using git-remote-bzr, but as far as I can tell this is
> > generic for all transport helpers using fast-export.
> >
> >
> >
> > What happened was "git push" failed due to merge conflict. So far so
> > good - but from now on git assumes everything is up to date.
> >
> > bor@opensuse:/tmp/test/git> git push origin master
> > To bzr::bzr+ssh://bor@localhost/tmp/test/bzr
> >  ! [rejected]        master -> master (non-fast-forward)
> > error: failed to push some refs to 
> > 'bzr::bzr+ssh://bor@localhost/tmp/test/bzr'
> > hint: Updates were rejected because the tip of your current branch is behind
> > hint: its remote counterpart. Merge the remote changes (e.g. 'git pull')
> > hint: before pushing again.
> > hint: See the 'Note about fast-forwards' in 'git push --help' for details.
> > bor@opensuse:/tmp/test/git> git push origin master
> > Everything up-to-date
> > bor@opensuse:/tmp/test/git>
> >
> > The problem seems to be that git fast-export updates marks
> > unconditionally, whether export actually applied or not. So next time
> > it assumes everything is already exported and does nothing.
> >
> > Is it expected behavior?
> Indeed, this is the way it currently works, and it's not easy to fix.
> We would need some way to make fast-export wait until we know the exit
> status of the remote helper, and then tell it when it failed, so the
> marks are not updated.
> However, the way remote-bzr/hg work is that the commits are still
> there anyway. So if you merge the next time you push those commits are
> already converted, so it's not a problem if fast-export is not
> exporting them again.
> So even though it's not ideal, it should work.
> The problem is when the remote-helper crashes and the marks of
> fast-export and the remote-helper are out of sync, and then the user
> is really screwed.

I sent patches that should fix this problem:


Felipe Contreras
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