tree c96da81ffda04e1d72e6464589fae51cdc245c78
parent 852e54bc0f8c7a478bf1f3a13b45fdfc6604aba7
author Felipe Contreras <felipe.contreras@gmail.com> 1397334812 -0500
committer Junio C Hamano <gitster@pobox.com> 1397509413 -0700

transport-helper: fix sync issue on crashes

When a remote helper crashes while pushing we should revert back to the
state before the push, however, it's possible that `git fast-export`
already finished its job, and therefore has exported the marks already.

This creates a synchronization problem because from that moment on
`git fast-{import,export}` will have marks that the remote helper is not
aware of and all further commands fail (if those marks are referenced).

The fix is to tell `git fast-export` to export to a temporary file, and
only after the remote helper has finishes successfully, move to the
final destination.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>