fast-export: Allow pruned-references in mark file
fast-export can fail because of some pruned-reference when importing a mark file. The problem happens in the following scenario: $ git fast-export --export-marks=MARKS master (rewrite master) $ git prune $ git fast-export --import-marks=MARKS master This might fail if some references have been removed by prune because some marks will refer to no longer existing commits. git-fast-export will not need these objects anyway as they were no longer reachable. We still need to update last_numid so we don't change the mapping between marks and objects for remote-helpers. Unfortunately, the mark file should not be rewritten without lost marks if no new objects has been exported, as we could lose track of the last last_numid. Signed-off-by: NAntoine Pelisse <apelisse@gmail.com> Reviewed-by: NFelipe Contreras <felipe.contreras@gmail.com> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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