refs.c: make get_main_ref_store() public and use it

get_ref_store() will soon be renamed to get_submodule_ref_store().
Together with future get_worktree_ref_store(), the three functions
provide an appropriate ref store for different operation modes. New APIs
will be added to operate directly on ref stores.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

refs.c

@@ -1314,7 +1314,7 @@ const char *resolve_ref_recursively(struct ref_store *refs,
 /* backend functions */
 int refs_init_db(struct strbuf *err)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->init_db(refs, err);
 }
@@ -1322,7 +1322,7 @@ int refs_init_db(struct strbuf *err)
 const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
 			       unsigned char *sha1, int *flags)
 {
-	return resolve_ref_recursively(get_ref_store(NULL), refname,
+	return resolve_ref_recursively(get_main_ref_store(), refname,
 				       resolve_flags, sha1, flags);
 }
 
@@ -1428,7 +1428,7 @@ static struct ref_store *ref_store_init(const char *submodule)
 	return refs;
 }
 
-static struct ref_store *get_main_ref_store(void)
+struct ref_store *get_main_ref_store(void)
 {
 	if (main_ref_store)
 		return main_ref_store;
@@ -1488,14 +1488,14 @@ void base_ref_store_init(struct ref_store *refs,
 /* backend functions */
 int pack_refs(unsigned int flags)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->pack_refs(refs, flags);
 }
 
 int peel_ref(const char *refname, unsigned char *sha1)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->peel_ref(refs, refname, sha1);
 }
@@ -1503,7 +1503,7 @@ int peel_ref(const char *refname, unsigned char *sha1)
 int create_symref(const char *ref_target, const char *refs_heads_master,
 		  const char *logmsg)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->create_symref(refs, ref_target, refs_heads_master,
 				       logmsg);
@@ -1512,7 +1512,7 @@ int create_symref(const char *ref_target, const char *refs_heads_master,
 int ref_transaction_commit(struct ref_transaction *transaction,
 			   struct strbuf *err)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->transaction_commit(refs, transaction, err);
 }
@@ -1522,14 +1522,14 @@ int verify_refname_available(const char *refname,
 			     const struct string_list *skip,
 			     struct strbuf *err)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->verify_refname_available(refs, refname, extra, skip, err);
 }
 
 int for_each_reflog(each_ref_fn fn, void *cb_data)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 	struct ref_iterator *iter;
 
 	iter = refs->be->reflog_iterator_begin(refs);
@@ -1540,7 +1540,7 @@ int for_each_reflog(each_ref_fn fn, void *cb_data)
 int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn,
 				void *cb_data)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->for_each_reflog_ent_reverse(refs, refname,
 						     fn, cb_data);
@@ -1549,14 +1549,14 @@ int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn,
 int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn,
 			void *cb_data)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->for_each_reflog_ent(refs, refname, fn, cb_data);
 }
 
 int reflog_exists(const char *refname)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->reflog_exists(refs, refname);
 }
@@ -1564,14 +1564,14 @@ int reflog_exists(const char *refname)
 int safe_create_reflog(const char *refname, int force_create,
 		       struct strbuf *err)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->create_reflog(refs, refname, force_create, err);
 }
 
 int delete_reflog(const char *refname)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->delete_reflog(refs, refname);
 }
@@ -1583,7 +1583,7 @@ int reflog_expire(const char *refname, const unsigned char *sha1,
 		  reflog_expiry_cleanup_fn cleanup_fn,
 		  void *policy_cb_data)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->reflog_expire(refs, refname, sha1, flags,
 				       prepare_fn, should_prune_fn,
@@ -1593,21 +1593,21 @@ int reflog_expire(const char *refname, const unsigned char *sha1,
 int initial_ref_transaction_commit(struct ref_transaction *transaction,
 				   struct strbuf *err)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->initial_transaction_commit(refs, transaction, err);
 }
 
 int delete_refs(struct string_list *refnames, unsigned int flags)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->delete_refs(refs, refnames, flags);
 }
 
 int rename_ref(const char *oldref, const char *newref, const char *logmsg)
 {
-	struct ref_store *refs = get_ref_store(NULL);
+	struct ref_store *refs = get_main_ref_store();
 
 	return refs->be->rename_ref(refs, oldref, newref, logmsg);
 }

refs.h

@@ -2,6 +2,7 @@
 #define REFS_H
 
 struct object_id;
+struct ref_store;
 struct strbuf;
 struct string_list;
 
@@ -560,4 +561,6 @@ int reflog_expire(const char *refname, const unsigned char *sha1,
 
 int ref_storage_backend_exists(const char *name);
 
+struct ref_store *get_main_ref_store(void);
+
 #endif /* REFS_H */

refs/files-backend.c

@@ -3163,7 +3163,7 @@ int set_worktree_head_symref(const char *gitdir, const char *target, const char
 	 * backends. This function needs to die.
 	 */
 	struct files_ref_store *refs =
-		files_downcast(get_ref_store(NULL), 0, "set_head_symref");
+		files_downcast(get_main_ref_store(), 0, "set_head_symref");
 
 	static struct lock_file head_lock;
 	struct ref_lock *lock;