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refs: keep track of unresolved reference value in iterators

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Since ref iterators do not hold onto the direct value of a reference
without resolving it, the only way to get ahold of a direct value of a
symbolic ref is to make a separate call to refs_read_symbolic_ref.

To make accessing the direct value of a symbolic ref more efficient,
let's save the direct value of the ref in the iterators for both the
files backend and the reftable backend.

Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
John Cai
2024-08-09 15:37:49 +00:00
committed by Junio C Hamano
parent 39bf06adf9
commit cfd971520e
6 changed files with 30 additions and 5 deletions
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2
refs/iterator.c
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@ -29,6 +29,7 @@ void base_ref_iterator_init(struct ref_iterator *iter,
{
iter->vtable = vtable;
iter->refname = NULL;
iter->referent = NULL;
iter->oid = NULL;
iter->flags = 0;
}
@ -199,6 +200,7 @@ static int merge_ref_iterator_advance(struct ref_iterator *ref_iterator)
}
if (selection & ITER_YIELD_CURRENT) {
iter->base.referent = (*iter->current)->referent;
iter->base.refname = (*iter->current)->refname;
iter->base.oid = (*iter->current)->oid;
iter->base.flags = (*iter->current)->flags;