[PATCH v4 10/15] refs.c: kill register_ref_store(), add register_submodule_ref_store()

[Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>]

This is the last function in this code (besides public API) that takes
submodule argument and handles both main/submodule cases. Break it down,
move main store registration in get_main_ref_store() and keep the rest
in register_submodule_ref_store().

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
 refs.c | 36 +++++++++++++++++++-----------------
 1 file changed, 19 insertions(+), 17 deletions(-)

diff --git a/refs.c b/refs.c
index 549eeccb4..8b640bd05 100644
--- a/refs.c
+++ b/refs.c
@@ -1407,25 +1407,19 @@ static struct ref_store *lookup_submodule_ref_store(const char *submodule)
 
 /*
  * Register the specified ref_store to be the one that should be used
- * for submodule (or the main repository if submodule is NULL). It is
- * a fatal error to call this function twice for the same submodule.
+ * for submodule. It is a fatal error to call this function twice for
+ * the same submodule.
  */
-static void register_ref_store(struct ref_store *refs, const char *submodule)
+static void register_submodule_ref_store(struct ref_store *refs,
+					 const char *submodule)
 {
-	if (!submodule) {
-		if (main_ref_store)
-			die("BUG: main_ref_store initialized twice");
-
-		main_ref_store = refs;
-	} else {
-		if (!submodule_ref_stores.tablesize)
-			hashmap_init(&submodule_ref_stores, submodule_hash_cmp, 0);
+	if (!submodule_ref_stores.tablesize)
+		hashmap_init(&submodule_ref_stores, submodule_hash_cmp, 0);
 
-		if (hashmap_put(&submodule_ref_stores,
-				alloc_submodule_hash_entry(submodule, refs)))
-			die("BUG: ref_store for submodule '%s' initialized twice",
-			    submodule);
-	}
+	if (hashmap_put(&submodule_ref_stores,
+			alloc_submodule_hash_entry(submodule, refs)))
+		die("BUG: ref_store for submodule '%s' initialized twice",
+		    submodule);
 }
 
 /*
@@ -1442,7 +1436,6 @@ static struct ref_store *ref_store_init(const char *submodule)
 		die("BUG: reference backend %s is unknown", be_name);
 
 	refs = be->init(submodule);
-	register_ref_store(refs, submodule);
 	return refs;
 }
 
@@ -1454,6 +1447,12 @@ static struct ref_store *get_main_ref_store(void)
 		return main_ref_store;
 
 	refs = ref_store_init(NULL);
+	if (refs) {
+		if (main_ref_store)
+			die("BUG: main_ref_store initialized twice");
+
+		main_ref_store = refs;
+	}
 	return refs;
 }
 
@@ -1474,6 +1473,9 @@ struct ref_store *get_ref_store(const char *submodule)
 	if (is_nonbare_repository_dir(&submodule_sb))
 		refs = ref_store_init(submodule);
 	strbuf_release(&submodule_sb);
+
+	if (refs)
+		register_submodule_ref_store(refs, submodule);
 	return refs;
 }
 
-- 
2.11.0.157.gd943d85