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ref_store: implement refs_peel_ref() generically

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We're about to stop storing packed refs in a `ref_cache`. That means
that the only way we have left to optimize `peel_ref()` is by checking
whether the reference being peeled is the one currently being iterated
over (in `current_ref_iter`), and if so, using `ref_iterator_peel()`.
But this can be done generically; it doesn't have to be implemented
per-backend.

So implement `refs_peel_ref()` in `refs.c` and remove the `peel_ref()`
method from the refs API.

This removes the last callers of a couple of functions, so delete
them. More cleanup to come...

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty
2017-09-25 10:00:14 +02:00
committed by Junio C Hamano
parent f3987ab36d
commit ba1c052fa6
4 changed files with 17 additions and 78 deletions
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18
refs.c
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@ -1735,7 +1735,23 @@ int refs_pack_refs(struct ref_store *refs, unsigned int flags)
int refs_peel_ref(struct ref_store *refs, const char *refname,
unsigned char *sha1)
{
return refs->be->peel_ref(refs, refname, sha1);
int flag;
unsigned char base[20];
if (current_ref_iter && current_ref_iter->refname == refname) {
struct object_id peeled;
if (ref_iterator_peel(current_ref_iter, &peeled))
return -1;
hashcpy(sha1, peeled.hash);
return 0;
}
if (refs_read_ref_full(refs, refname,
RESOLVE_REF_READING, base, &flag))
return -1;
return peel_object(base, sha1);
}
int peel_ref(const char *refname, unsigned char *sha1)