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object-file: refactor freshening of objects

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When writing an object that already exists in our object database we
skip the write and instead only update mtimes of the object, either in
its packed or loose object format. This logic is wholly contained in
"object-file.c", but that file is really only concerned with loose
objects. So it does not really make sense that it also contains the
logic to freshen a packed object.

Introduce a new `odb_freshen_object()` function that sits on the object
database level and two functions `packfile_store_freshen_object()` and
`odb_source_loose_freshen_object()`. Like this, the format-specific
functions can be part of their respective subsystems, while the backend
agnostic function to freshen an object sits at the object database
layer.

Note that this change also moves the logic that iterates through object
sources from the object source layer into the object database layer.
This change is intentional: object sources should ideally only have to
worry about themselves, and coordination of different sources should be
handled on the object database level.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2025-11-03 08:42:06 +01:00
committed by Junio C Hamano
parent 05130c6c9e
commit f2bd88a308
6 changed files with 46 additions and 28 deletions
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16
packfile.c
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@@ -819,6 +819,22 @@ struct packed_git *packfile_store_load_pack(struct packfile_store *store,
return p;
}
int packfile_store_freshen_object(struct packfile_store *store,
const struct object_id *oid)
{
struct pack_entry e;
if (!find_pack_entry(store->odb->repo, oid, &e))
return 0;
if (e.p->is_cruft)
return 0;
if (e.p->freshened)
return 1;
if (utime(e.p->pack_name, NULL))
return 0;
e.p->freshened = 1;
return 1;
}
void (*report_garbage)(unsigned seen_bits, const char *path);
static void report_helper(const struct string_list *list,