Signed-off-by: David Turner <dturner@xxxxxxxxxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
refs.c | 5 +++++
refs/files-backend.c | 4 +++-
refs/refs-internal.h | 8 ++++++++
3 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/refs.c b/refs.c
index b2697f6..5364dc6 100644
--- a/refs.c
+++ b/refs.c
@@ -1415,3 +1415,8 @@ int delete_refs(struct string_list *refnames)
{
return the_refs_backend->delete_refs(refnames);
}
+
+int rename_ref(const char *oldref, const char *newref, const char *logmsg)
+{
+ return the_refs_backend->rename_ref(oldref, newref, logmsg);
+}
diff --git a/refs/files-backend.c b/refs/files-backend.c
index acb4401..534bbaf 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -2359,7 +2359,8 @@ static int commit_ref_update(struct ref_lock *lock,
const unsigned char *sha1, const char *logmsg,
int flags, struct strbuf *err);
-int rename_ref(const char *oldrefname, const char *newrefname, const char *logmsg)
+static int files_rename_ref(const char *oldrefname, const char *newrefname,
+ const char *logmsg)
{
unsigned char sha1[20], orig_sha1[20];
int flag = 0, logmoved = 0;
@@ -3449,6 +3450,7 @@ struct ref_storage_be refs_be_files = {
files_peel_ref,
files_create_symref,
files_delete_refs,
+ files_rename_ref,
files_read_raw_ref,
files_verify_refname_available,
diff --git a/refs/refs-internal.h b/refs/refs-internal.h
index dfd0326..d6fe199 100644
--- a/refs/refs-internal.h
+++ b/refs/refs-internal.h
@@ -195,6 +195,11 @@ const char *find_descendant_ref(const char *dirname,
const struct string_list *extras,
const struct string_list *skip);
+/*
+ * Check if the new name does not conflict with any existing refs
+ * (other than possibly the old ref). Return 0 if the ref can be
+ * renamed to the new name.
+ */
int rename_ref_available(const char *oldname, const char *newname);
/* We allow "recursive" symbolic refs. Only within reason, though */
@@ -241,6 +246,8 @@ typedef int create_symref_fn(const char *ref_target,
const char *refs_heads_master,
const char *logmsg);
typedef int delete_refs_fn(struct string_list *refnames);
+typedef int rename_ref_fn(const char *oldref, const char *newref,
+ const char *logmsg);
/* resolution methods */
typedef int read_raw_ref_fn(const char *refname, unsigned char *sha1,
@@ -272,6 +279,7 @@ struct ref_storage_be {
peel_ref_fn *peel_ref;
create_symref_fn *create_symref;
delete_refs_fn *delete_refs;
+ rename_ref_fn *rename_ref;
read_raw_ref_fn *read_raw_ref;
verify_refname_available_fn *verify_refname_available;
--
2.4.2.767.g62658d5-twtrsrc
--
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