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object-store: allow fetching objects via `has_object()` 

We're about to fully remove `repo_has_object_file()` in favor of
`has_object()`. The latter function does not yet have a way to fetch
missing objects via a promisor remote though, which means that it cannot
fully replace all usecases of `repo_has_object_file()`.

Introduce a new flag `HAS_OBJECT_FETCH_PROMISOR` that causes the
function to optionally fetch missing objects which are part of a
promisor pack. This flag will be used in the subsequent commit.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Patrick Steinhardt 2025-04-29 09:52:19 +02:00 committed by Junio C Hamano
parent 1a793261c5
commit f8fc4cacd3
2 changed files with 13 additions and 6 deletions
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9
object-store.c
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@ -937,12 +937,15 @@ void *read_object_with_reference(struct repository *r,
int has_object(struct repository *r, const struct object_id *oid,
unsigned flags)
{
int quick = !(flags & HAS_OBJECT_RECHECK_PACKED);
unsigned object_info_flags = OBJECT_INFO_SKIP_FETCH_OBJECT |
(quick ? OBJECT_INFO_QUICK : 0);
unsigned object_info_flags = 0;

if (!startup_info->have_repository)
return 0;
if (!(flags & HAS_OBJECT_RECHECK_PACKED))
object_info_flags |= OBJECT_INFO_QUICK;
if (!(flags & HAS_OBJECT_FETCH_PROMISOR))
object_info_flags |= OBJECT_INFO_SKIP_FETCH_OBJECT;

return oid_object_info_extended(r, oid, NULL, object_info_flags) >= 0;
}


10
object-store.h
View File

@ -262,12 +262,16 @@ int oid_object_info_extended(struct repository *r,
const struct object_id *,
struct object_info *, unsigned flags);

/* Retry packed storage after checking packed and loose storage */
#define HAS_OBJECT_RECHECK_PACKED 1
enum {
/* Retry packed storage after checking packed and loose storage */
HAS_OBJECT_RECHECK_PACKED = (1 << 0),
/* Allow fetching the object in case the repository has a promisor remote. */
HAS_OBJECT_FETCH_PROMISOR = (1 << 1),
};

/*
* Returns 1 if the object exists. This function will not lazily fetch objects
* in a partial clone.
* in a partial clone by default.
*/
int has_object(struct repository *r, const struct object_id *oid,
unsigned flags);