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refs: refactor logic to look up storage backends

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In order to look up ref storage backends, we're currently using a linked
list of backends, where each backend is expected to set up its `next`
pointer to the next ref storage backend. This is kind of a weird setup
as backends need to be aware of other backends without much of a reason.

Refactor the code so that the array of backends is centrally defined in
"refs.c", where each backend is now identified by an integer constant.
Expose functions to translate from those integer constants to the name
and vice versa, which will be required by subsequent patches.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Patrick Steinhardt
2023-12-29 08:26:34 +01:00
committed by Junio C Hamano
parent 465a22b338
commit 0fcc285c5e
7 changed files with 31 additions and 13 deletions
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1
refs/refs-internal.h
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@ -663,7 +663,6 @@ typedef int read_symbolic_ref_fn(struct ref_store *ref_store, const char *refnam
struct strbuf *referent);
struct ref_storage_be {
struct ref_storage_be *next;
const char *name;
ref_store_init_fn *init;
ref_init_db_fn *init_db;