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core.fsync: new option to harden the index

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This commit introduces the new ability for the user to harden
the index. In the event of a system crash, the index must be
durable for the user to actually find a file that has been added
to the repo and then deleted from the working tree.

We use the presence of the COMMIT_LOCK flag and absence of the
alternate_index_output as a proxy for determining whether we're
updating the persistent index of the repo or some temporary
index. We don't sync these temporary indexes.

Signed-off-by: Neeraj Singh <neerajsi@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Neeraj Singh
2022-03-10 22:43:23 +00:00
committed by Junio C Hamano
parent 844a8ad4f8
commit ba95e96d4c
3 changed files with 15 additions and 6 deletions
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config.c
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@ -1331,6 +1331,7 @@ static const struct fsync_component_name {
{ "pack", FSYNC_COMPONENT_PACK },
{ "pack-metadata", FSYNC_COMPONENT_PACK_METADATA },
{ "commit-graph", FSYNC_COMPONENT_COMMIT_GRAPH },
{ "index", FSYNC_COMPONENT_INDEX },
};
static enum fsync_component parse_fsync_components(const char *var, const char *string)