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odb: introduce parent pointers

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In subsequent commits we'll get rid of our use of `the_repository` in
"odb.c" in favor of explicitly passing in a `struct object_database` or
a `struct odb_source`. In some cases though we'll need access to the
repository, for example to read a config value from it, but we don't
have a way to access the repository owning a specific object database.

Introduce parent pointers for `struct object_database` to its owning
repository as well as for `struct odb_source` to its owning object
database, which will allow us to adapt those use cases.

Note that this change requires us to pass through the object database to
`link_alt_odb_entry()` so that we can set up the parent pointers for any
source there. The callchain is adapted to pass through the object
database accordingly.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2025-07-01 14:22:16 +02:00
committed by Junio C Hamano
parent 8f49151763
commit 2f5181fce6
3 changed files with 35 additions and 21 deletions
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3
repository.c
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@@ -52,7 +52,7 @@ static void set_default_hash_algo(struct repository *repo)
void initialize_repository(struct repository *repo)
{
repo->objects = odb_new();
repo->objects = odb_new(repo);
repo->remote_state = remote_state_new();
repo->parsed_objects = parsed_object_pool_new(repo);
ALLOC_ARRAY(repo->index, 1);
@@ -167,6 +167,7 @@ void repo_set_gitdir(struct repository *repo,
if (!repo->objects->sources) {
CALLOC_ARRAY(repo->objects->sources, 1);
repo->objects->sources->odb = repo->objects;
repo->objects->sources_tail = &repo->objects->sources->next;
}
expand_base_dir(&repo->objects->sources->path, o->object_dir,