refs: add methods for misc ref operations

Add ref backend methods for:
read_raw_ref, verify_refname_available, pack_refs, peel_ref,
create_symref, resolve_gitlink_ref.

read_raw_ref becomes static because it's not used outside refs.c

Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
Signed-off-by: David Turner <dturner@twopensource.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

3 files changed, 82 insertions, 15 deletions

diff --git a/refs.c b/refs.c
index 15a063c94e..c1306c892c 100644
--- a/refs.c
+++ b/refs.c
@@ -1191,6 +1191,14 @@ int for_each_rawref(each_ref_fn fn, void *cb_data)
 			       DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
 }
 
+static int read_raw_ref(const char *refname, unsigned char *sha1,
+			struct strbuf *symref, struct strbuf *sb_path,
+			unsigned int *flags)
+{
+	return the_refs_backend->read_raw_ref(refname, sha1, symref, sb_path,
+					      flags);
+}
+
 /* This function needs to return a meaningful errno on failure */
 static const char *resolve_ref_1(const char *refname,
 				 int resolve_flags,
@@ -1302,3 +1310,32 @@ int ref_transaction_commit(struct ref_transaction *transaction,
 {
 	return the_refs_backend->transaction_commit(transaction, err);
 }
+
+int verify_refname_available(const char *refname, struct string_list *extra,
+			     struct string_list *skip, struct strbuf *err)
+{
+	return the_refs_backend->verify_refname_available(refname, extra, skip, err);
+}
+
+int pack_refs(unsigned int flags)
+{
+	return the_refs_backend->pack_refs(flags);
+}
+
+int peel_ref(const char *refname, unsigned char *sha1)
+{
+	return the_refs_backend->peel_ref(refname, sha1);
+}
+
+int create_symref(const char *ref_target, const char *refs_heads_master,
+		  const char *logmsg)
+{
+	return the_refs_backend->create_symref(ref_target, refs_heads_master,
+					       logmsg);
+}
+
+int resolve_gitlink_ref(const char *path, const char *refname,
+			unsigned char *sha1)
+{
+	return the_refs_backend->resolve_gitlink_ref(path, refname, sha1);
+}
diff --git a/refs/files-backend.c b/refs/files-backend.c
index 30483e8aca..68eb3b390b 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -1338,7 +1338,8 @@ static int resolve_gitlink_ref_recursive(struct ref_cache *refs,
 	return resolve_gitlink_ref_recursive(refs, p, sha1, recursion+1);
 }
 
-int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1)
+static int files_resolve_gitlink_ref(const char *path, const char *refname,
+				     unsigned char *sha1)
 {
 	int len = strlen(path), retval;
 	struct strbuf submodule = STRBUF_INIT;
@@ -1421,9 +1422,9 @@ static int resolve_missing_loose_ref(const char *refname,
  *
  * sb_path is workspace: the caller should allocate and free it.
  */
-int read_raw_ref(const char *refname, unsigned char *sha1,
-		 struct strbuf *symref, struct strbuf *sb_path,
-		 unsigned int *flags)
+static int files_read_raw_ref(const char *refname, unsigned char *sha1,
+			      struct strbuf *symref, struct strbuf *sb_path,
+			      unsigned int *flags)
 {
 	struct strbuf sb_contents = STRBUF_INIT;
 	int ret = -1;
@@ -1576,7 +1577,7 @@ static enum peel_status peel_entry(struct ref_entry *entry, int repeel)
 	return status;
 }
 
-int peel_ref(const char *refname, unsigned char *sha1)
+static int files_peel_ref(const char *refname, unsigned char *sha1)
 {
 	int flag;
 	unsigned char base[20];
@@ -2136,7 +2137,7 @@ static void prune_refs(struct ref_to_prune *r)
 	}
 }
 
-int pack_refs(unsigned int flags)
+static int files_pack_refs(unsigned int flags)
 {
 	struct pack_refs_cb_data cbdata;
 
@@ -2327,10 +2328,10 @@ out:
 	return ret;
 }
 
-int verify_refname_available(const char *newname,
-			     struct string_list *extras,
-			     struct string_list *skip,
-			     struct strbuf *err)
+static int files_verify_refname_available(const char *newname,
+					  struct string_list *extras,
+					  struct string_list *skip,
+					  struct strbuf *err)
 {
 	struct ref_dir *packed_refs = get_packed_refs(&ref_cache);
 	struct ref_dir *loose_refs = get_loose_refs(&ref_cache);
@@ -2750,7 +2751,9 @@ static int create_symref_locked(struct ref_lock *lock, const char *refname,
 	return 0;
 }
 
-int create_symref(const char *refname, const char *target, const char *logmsg)
+static int files_create_symref(const char *refname,
+			       const char *target,
+			       const char *logmsg)
 {
 	struct strbuf err = STRBUF_INIT;
 	struct ref_lock *lock;
@@ -3404,4 +3407,12 @@ struct ref_storage_be refs_be_files = {
 	NULL,
 	"files",
 	files_transaction_commit,
+
+	files_pack_refs,
+	files_peel_ref,
+	files_create_symref,
+
+	files_read_raw_ref,
+	files_verify_refname_available,
+	files_resolve_gitlink_ref,
 };
diff --git a/refs/refs-internal.h b/refs/refs-internal.h
index 62ba0c0b58..c5f5ef7671 100644
--- a/refs/refs-internal.h
+++ b/refs/refs-internal.h
@@ -209,18 +209,37 @@ int rename_ref_available(const char *oldname, const char *newname);
 int do_for_each_ref(const char *submodule, const char *base,
 		    each_ref_fn fn, int trim, int flags, void *cb_data);
 
-int read_raw_ref(const char *refname, unsigned char *sha1,
-		 struct strbuf *symref, struct strbuf *sb_path,
-		 unsigned int *flags);
-
 /* refs backends */
 typedef int ref_transaction_commit_fn(struct ref_transaction *transaction,
 				      struct strbuf *err);
 
+/* misc methods */
+typedef int pack_refs_fn(unsigned int flags);
+typedef int peel_ref_fn(const char *refname, unsigned char *sha1);
+typedef int create_symref_fn(const char *ref_target,
+			     const char *refs_heads_master,
+			     const char *logmsg);
+
+/* resolution methods */
+typedef int read_raw_ref_fn(const char *refname, unsigned char *sha1,
+			    struct strbuf *symref, struct strbuf *sb_path,
+			    unsigned int *flags);
+typedef int verify_refname_available_fn(const char *refname, struct string_list *extra, struct string_list *skip, struct strbuf *err);
+typedef int resolve_gitlink_ref_fn(const char *path, const char *refname,
+				   unsigned char *sha1);
+
 struct ref_storage_be {
 	struct ref_storage_be *next;
 	const char *name;
 	ref_transaction_commit_fn *transaction_commit;
+
+	pack_refs_fn *pack_refs;
+	peel_ref_fn *peel_ref;
+	create_symref_fn *create_symref;
+
+	read_raw_ref_fn *read_raw_ref;
+	verify_refname_available_fn *verify_refname_available;
+	resolve_gitlink_ref_fn *resolve_gitlink_ref;
 };
 
 extern struct ref_storage_be refs_be_files;