[PATCH 04/15] refs: move submodule slash stripping code to get_submodule_ref_store

[Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>]

This is a better place that will benefit all submodule callers instead
of just resolve_gitlink_ref()

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
 refs.c | 38 ++++++++++++++++++++------------------
 1 file changed, 20 insertions(+), 18 deletions(-)

diff --git a/refs.c b/refs.c
index 23e0a8eda..9c86c44b8 100644
--- a/refs.c
+++ b/refs.c
@@ -1321,25 +1321,10 @@ const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
 int resolve_gitlink_ref(const char *submodule, const char *refname,
 			unsigned char *sha1)
 {
-	size_t len = strlen(submodule);
 	struct ref_store *refs;
 	int flags;
 
-	while (len && submodule[len - 1] == '/')
-		len--;
-
-	if (!len)
-		return -1;
-
-	if (submodule[len]) {
-		/* We need to strip off one or more trailing slashes */
-		char *stripped = xmemdupz(submodule, len);
-
-		refs = get_submodule_ref_store(stripped);
-		free(stripped);
-	} else {
-		refs = get_submodule_ref_store(submodule);
-	}
+	refs = get_submodule_ref_store(submodule);
 
 	if (!refs)
 		return -1;
@@ -1458,7 +1443,17 @@ struct ref_store *get_submodule_ref_store(const char *submodule)
 {
 	struct strbuf submodule_sb = STRBUF_INIT;
 	struct ref_store *refs;
+	char *to_free = NULL;
 	int ret;
+	size_t len;
+
+	if (submodule) {
+		len = strlen(submodule);
+		while (len && submodule[len - 1] == '/')
+			len--;
+		if (!len)
+			submodule = NULL;
+	}
 
 	if (!submodule || !*submodule) {
 		/*
@@ -1468,15 +1463,19 @@ struct ref_store *get_submodule_ref_store(const char *submodule)
 		return get_main_ref_store();
 	}
 
+	if (submodule[len])
+		/* We need to strip off one or more trailing slashes */
+		submodule = to_free = xmemdupz(submodule, len);
+
 	refs = lookup_submodule_ref_store(submodule);
 	if (refs)
-		return refs;
+		goto done;
 
 	strbuf_addstr(&submodule_sb, submodule);
 	ret = is_nonbare_repository_dir(&submodule_sb);
 	strbuf_release(&submodule_sb);
 	if (!ret)
-		return refs;
+		goto done;
 
 	ret = submodule_to_gitdir(&submodule_sb, submodule);
 	if (!ret)
@@ -1485,6 +1484,9 @@ struct ref_store *get_submodule_ref_store(const char *submodule)
 
 	if (refs)
 		register_submodule_ref_store(refs, submodule);
+
+done:
+	free(to_free);
 	return refs;
 }
 
-- 
2.11.0.157.gd943d85