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transport: do not list refs if possible

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When all refs to be fetched are exact OIDs, it is possible to perform a
fetch without requiring the remote to list refs if protocol v2 is used.
Teach Git to do this.

This currently has an effect only for lazy fetches done from partial
clones. The change necessary to likewise optimize "git fetch <remote>
<sha-1>" will be done in a subsequent patch.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Tan
2018-09-27 12:24:05 -07:00
committed by Junio C Hamano
parent 99bcb883cb
commit 0177565148
3 changed files with 16 additions and 3 deletions
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2
fetch-pack.c
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@ -1598,7 +1598,7 @@ struct ref *fetch_pack(struct fetch_pack_args *args,
if (nr_sought)
nr_sought = remove_duplicates_in_refs(sought, nr_sought);
if (!ref) {
if (version != protocol_v2 && !ref) {
packet_flush(fd[1]);
die(_("no matching remote head"));
}