[PATCH v2 9/9] read_loose_refs(): read refs using resolve_ref_recursively()

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There is no need to call read_ref_full() or resolve_gitlink_ref() from
read_loose_refs(), because we already have a ref_store object in hand.
So we can call resolve_ref_recursively() ourselves. Happily, this
unifies the code for the submodule vs. non-submodule cases.

This requires resolve_ref_recursively() to be exposed to the refs
subsystem, though not to non-refs code.

Signed-off-by: Michael Haggerty <mhagger@xxxxxxxxxxxx>
---
 refs.c               | 50 +++++++++++++++++++++++++-------------------------
 refs/files-backend.c | 18 ++++--------------
 refs/refs-internal.h |  5 +++++
 3 files changed, 34 insertions(+), 39 deletions(-)

diff --git a/refs.c b/refs.c
index 05af56b..f03dcf5 100644
--- a/refs.c
+++ b/refs.c
@@ -1230,10 +1230,10 @@ int for_each_rawref(each_ref_fn fn, void *cb_data)
 }
 
 /* This function needs to return a meaningful errno on failure */
-static const char *resolve_ref_recursively(struct ref_store *refs,
-					   const char *refname,
-					   int resolve_flags,
-					   unsigned char *sha1, int *flags)
+const char *resolve_ref_recursively(struct ref_store *refs,
+				    const char *refname,
+				    int resolve_flags,
+				    unsigned char *sha1, int *flags)
 {
 	static struct strbuf sb_refname = STRBUF_INIT;
 	int unused_flags;
@@ -1390,27 +1390,6 @@ static struct ref_store *main_ref_store;
 static struct hashmap submodule_ref_stores;
 
 /*
- * Return the ref_store instance for the specified submodule (or the
- * main repository if submodule is NULL). If that ref_store hasn't
- * been initialized yet, return NULL.
- */
-static struct ref_store *lookup_ref_store(const char *submodule)
-{
-	struct submodule_hash_entry *entry;
-
-	if (!submodule)
-		return main_ref_store;
-
-	if (!submodule_ref_stores.tablesize)
-		/* It's initialized on demand in register_ref_store(). */
-		return NULL;
-
-	entry = hashmap_get_from_hash(&submodule_ref_stores,
-				      strhash(submodule), submodule);
-	return entry ? entry->refs : NULL;
-}
-
-/*
  * 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.
@@ -1451,6 +1430,27 @@ static struct ref_store *ref_store_init(const char *submodule)
 	return refs;
 }
 
+/*
+ * Return the ref_store instance for the specified submodule (or the
+ * main repository if submodule is NULL). If that ref_store hasn't
+ * been initialized yet, return NULL.
+ */
+static struct ref_store *lookup_ref_store(const char *submodule)
+{
+	struct submodule_hash_entry *entry;
+
+	if (!submodule)
+		return main_ref_store;
+
+	if (!submodule_ref_stores.tablesize)
+		/* It's initialized on demand in register_ref_store(). */
+		return NULL;
+
+	entry = hashmap_get_from_hash(&submodule_ref_stores,
+				      strhash(submodule), submodule);
+	return entry ? entry->refs : NULL;
+}
+
 struct ref_store *get_ref_store(const char *submodule)
 {
 	struct ref_store *refs;
diff --git a/refs/files-backend.c b/refs/files-backend.c
index 4fe92f0..cdb6b8f 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -1267,20 +1267,10 @@ static void read_loose_refs(const char *dirname, struct ref_dir *dir)
 					 create_dir_entry(refs, refname.buf,
 							  refname.len, 1));
 		} else {
-			int read_ok;
-
-			if (refs->submodule) {
-				hashclr(sha1);
-				flag = 0;
-				read_ok = !resolve_gitlink_ref(refs->submodule,
-							       refname.buf, sha1);
-			} else {
-				read_ok = !read_ref_full(refname.buf,
-							 RESOLVE_REF_READING,
-							 sha1, &flag);
-			}
-
-			if (!read_ok) {
+			if (!resolve_ref_recursively(&refs->base,
+						     refname.buf,
+						     RESOLVE_REF_READING,
+						     sha1, &flag)) {
 				hashclr(sha1);
 				flag |= REF_ISBROKEN;
 			} else if (is_null_sha1(sha1)) {
diff --git a/refs/refs-internal.h b/refs/refs-internal.h
index 793c850..33adbf9 100644
--- a/refs/refs-internal.h
+++ b/refs/refs-internal.h
@@ -650,4 +650,9 @@ void base_ref_store_init(struct ref_store *refs,
  */
 struct ref_store *get_ref_store(const char *submodule);
 
+const char *resolve_ref_recursively(struct ref_store *refs,
+				    const char *refname,
+				    int resolve_flags,
+				    unsigned char *sha1, int *flags);
+
 #endif /* REFS_REFS_INTERNAL_H */
-- 
2.9.3




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