[PATCH 02/12] refs: use designated initializers for "struct ref_storage_be"

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Change the definition of the three refs backends we currently carry to
use designated initializers.

The "= NULL" assignments being retained here are redundant, and could
be removed, but let's keep them for clarity. All of these backends
define almost all fields, so we're not saving much in terms of line
count by omitting these, but e.g. for "refs_be_debug" it's immediately
apparent that we're omitting "init" when comparing its assignment to
the others.

This is a follow-up to similar work merged in bd4232fac33 (Merge
branch 'ab/struct-init', 2021-07-16), a4b9fb6a5cf (Merge branch
'ab/designated-initializers-more', 2021-10-18) and a30321b9eae (Merge
branch 'ab/designated-initializers' into
ab/designated-initializers-more, 2021-09-27).

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 refs/debug.c          | 50 +++++++++++++++++++++----------------------
 refs/files-backend.c  | 50 +++++++++++++++++++++----------------------
 refs/packed-backend.c | 50 +++++++++++++++++++++----------------------
 3 files changed, 75 insertions(+), 75 deletions(-)

diff --git a/refs/debug.c b/refs/debug.c
index 2b0771ca53b..c8b52d43a79 100644
--- a/refs/debug.c
+++ b/refs/debug.c
@@ -418,29 +418,29 @@ static int debug_reflog_expire(struct ref_store *ref_store, const char *refname,
 }
 
 struct ref_storage_be refs_be_debug = {
-	NULL,
-	"debug",
-	NULL,
-	debug_init_db,
-	debug_transaction_prepare,
-	debug_transaction_finish,
-	debug_transaction_abort,
-	debug_initial_transaction_commit,
-
-	debug_pack_refs,
-	debug_create_symref,
-	debug_delete_refs,
-	debug_rename_ref,
-	debug_copy_ref,
-
-	debug_ref_iterator_begin,
-	debug_read_raw_ref,
-
-	debug_reflog_iterator_begin,
-	debug_for_each_reflog_ent,
-	debug_for_each_reflog_ent_reverse,
-	debug_reflog_exists,
-	debug_create_reflog,
-	debug_delete_reflog,
-	debug_reflog_expire,
+	.next = NULL,
+	.name = "debug",
+	.init = NULL,
+	.init_db = debug_init_db,
+	.transaction_prepare = debug_transaction_prepare,
+	.transaction_finish = debug_transaction_finish,
+	.transaction_abort = debug_transaction_abort,
+	.initial_transaction_commit = debug_initial_transaction_commit,
+
+	.pack_refs = debug_pack_refs,
+	.create_symref = debug_create_symref,
+	.delete_refs = debug_delete_refs,
+	.rename_ref = debug_rename_ref,
+	.copy_ref = debug_copy_ref,
+
+	.iterator_begin = debug_ref_iterator_begin,
+	.read_raw_ref = debug_read_raw_ref,
+
+	.reflog_iterator_begin = debug_reflog_iterator_begin,
+	.for_each_reflog_ent = debug_for_each_reflog_ent,
+	.for_each_reflog_ent_reverse = debug_for_each_reflog_ent_reverse,
+	.reflog_exists = debug_reflog_exists,
+	.create_reflog = debug_create_reflog,
+	.delete_reflog = debug_delete_reflog,
+	.reflog_expire = debug_reflog_expire,
 };
diff --git a/refs/files-backend.c b/refs/files-backend.c
index f59589d6cce..efc942958ef 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -3269,29 +3269,29 @@ static int files_init_db(struct ref_store *ref_store, struct strbuf *err)
 }
 
 struct ref_storage_be refs_be_files = {
-	NULL,
-	"files",
-	files_ref_store_create,
-	files_init_db,
-	files_transaction_prepare,
-	files_transaction_finish,
-	files_transaction_abort,
-	files_initial_transaction_commit,
-
-	files_pack_refs,
-	files_create_symref,
-	files_delete_refs,
-	files_rename_ref,
-	files_copy_ref,
-
-	files_ref_iterator_begin,
-	files_read_raw_ref,
-
-	files_reflog_iterator_begin,
-	files_for_each_reflog_ent,
-	files_for_each_reflog_ent_reverse,
-	files_reflog_exists,
-	files_create_reflog,
-	files_delete_reflog,
-	files_reflog_expire
+	.next = NULL,
+	.name = "files",
+	.init = files_ref_store_create,
+	.init_db = files_init_db,
+	.transaction_prepare = files_transaction_prepare,
+	.transaction_finish = files_transaction_finish,
+	.transaction_abort = files_transaction_abort,
+	.initial_transaction_commit = files_initial_transaction_commit,
+
+	.pack_refs = files_pack_refs,
+	.create_symref = files_create_symref,
+	.delete_refs = files_delete_refs,
+	.rename_ref = files_rename_ref,
+	.copy_ref = files_copy_ref,
+
+	.iterator_begin = files_ref_iterator_begin,
+	.read_raw_ref = files_read_raw_ref,
+
+	.reflog_iterator_begin = files_reflog_iterator_begin,
+	.for_each_reflog_ent = files_for_each_reflog_ent,
+	.for_each_reflog_ent_reverse = files_for_each_reflog_ent_reverse,
+	.reflog_exists = files_reflog_exists,
+	.create_reflog = files_create_reflog,
+	.delete_reflog = files_delete_reflog,
+	.reflog_expire = files_reflog_expire
 };
diff --git a/refs/packed-backend.c b/refs/packed-backend.c
index 27dd8c3922b..ba75c28f1bf 100644
--- a/refs/packed-backend.c
+++ b/refs/packed-backend.c
@@ -1667,29 +1667,29 @@ static int packed_reflog_expire(struct ref_store *ref_store,
 }
 
 struct ref_storage_be refs_be_packed = {
-	NULL,
-	"packed",
-	packed_ref_store_create,
-	packed_init_db,
-	packed_transaction_prepare,
-	packed_transaction_finish,
-	packed_transaction_abort,
-	packed_initial_transaction_commit,
-
-	packed_pack_refs,
-	packed_create_symref,
-	packed_delete_refs,
-	packed_rename_ref,
-	packed_copy_ref,
-
-	packed_ref_iterator_begin,
-	packed_read_raw_ref,
-
-	packed_reflog_iterator_begin,
-	packed_for_each_reflog_ent,
-	packed_for_each_reflog_ent_reverse,
-	packed_reflog_exists,
-	packed_create_reflog,
-	packed_delete_reflog,
-	packed_reflog_expire
+	.next = NULL,
+	.name = "packed",
+	.init = packed_ref_store_create,
+	.init_db = packed_init_db,
+	.transaction_prepare = packed_transaction_prepare,
+	.transaction_finish = packed_transaction_finish,
+	.transaction_abort = packed_transaction_abort,
+	.initial_transaction_commit = packed_initial_transaction_commit,
+
+	.pack_refs = packed_pack_refs,
+	.create_symref = packed_create_symref,
+	.delete_refs = packed_delete_refs,
+	.rename_ref = packed_rename_ref,
+	.copy_ref = packed_copy_ref,
+
+	.iterator_begin = packed_ref_iterator_begin,
+	.read_raw_ref = packed_read_raw_ref,
+
+	.reflog_iterator_begin = packed_reflog_iterator_begin,
+	.for_each_reflog_ent = packed_for_each_reflog_ent,
+	.for_each_reflog_ent_reverse = packed_for_each_reflog_ent_reverse,
+	.reflog_exists = packed_reflog_exists,
+	.create_reflog = packed_create_reflog,
+	.delete_reflog = packed_delete_reflog,
+	.reflog_expire = packed_reflog_expire
 };
-- 
2.35.1.1157.g524e2d5a0db