[PATCH v7 28/33] refs: register ref storage backends

From

David Turner <dturner@twopensource.com>

Date

Mar 1, 2016, 00:53 UTC

Message-ID

<1456793586-22082-29-git-send-email-dturner@twopensource.com>

In-Reply-To

<1456793586-22082-1-git-send-email-dturner@twopensource.com>

Call the function before calling set_ref_storage_backend.

Signed-off-by: David Turner <dturner@twopensource.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 builtin/init-db.c |  3 +++
 refs.c            | 22 ++++++++++++++++++----
 refs.h            |  2 ++
 3 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/builtin/init-db.c b/builtin/init-db.c
index af7fe04..04cc522 100644
--- a/builtin/init-db.c
+++ b/builtin/init-db.c
@@ -220,6 +220,7 @@ static int create_default_files(const char *template_path)
 			      requested_ref_storage_backend);
 	}
 
+	register_ref_storage_backends();
 	if (requested_ref_storage_backend)
 		ref_storage_backend = requested_ref_storage_backend;
 	if (strcmp(ref_storage_backend, "files")) {
@@ -502,6 +503,8 @@ int cmd_init_db(int argc, const char **argv, const char *prefix)
 
 	argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);
 
+	register_ref_storage_backends();
+
 	if (requested_ref_storage_backend &&
 	    !ref_storage_backend_exists(requested_ref_storage_backend))
 		die(_("Unknown ref storage backend %s"),
diff --git a/refs.c b/refs.c
index 5d69179..5fe0bac 100644
--- a/refs.c
+++ b/refs.c
@@ -14,14 +14,11 @@ static const char split_transaction_fail_warning[] = N_(
 	"transaction succeeded, but then the update to the per-worktree refs "
 	"failed.  Your repository may be in an inconsistent state.");
 
-/*
- * We always have a files backend and it is the default.
- */
 static struct ref_storage_be *the_refs_backend = &refs_be_files;
 /*
  * List of all available backends
  */
-static struct ref_storage_be *refs_backends = &refs_be_files;
+static struct ref_storage_be *refs_backends;
 
 const char *ref_storage_backend = "files";
 
@@ -48,6 +45,23 @@ int ref_storage_backend_exists(const char *name)
 	return find_ref_storage_backend(name) != NULL;
 }
 
+static void register_ref_storage_backend(struct ref_storage_be *be)
+{
+	be->next = refs_backends;
+	refs_backends = be;
+}
+
+void register_ref_storage_backends(void)
+{
+	if (refs_backends)
+		return;
+	/*
+	 * Add register_ref_storage_backend(ptr-to-backend)
+	 * entries below when you add a new backend.
+	 */
+	register_ref_storage_backend(&refs_be_files);
+}
+
 /*
  * How to handle various characters in refnames:
  * 0: An acceptable character for refs
diff --git a/refs.h b/refs.h
index 1888ad8..c0964f5 100644
--- a/refs.h
+++ b/refs.h
@@ -523,4 +523,6 @@ int set_ref_storage_backend(const char *name);
 
 int ref_storage_backend_exists(const char *name);
 
+void register_ref_storage_backends(void);
+
 #endif /* REFS_H */

-- 
2.4.2.767.g62658d5-twtrsrc