#ifndef REFS_PACKED_BACKEND_H
#define REFS_PACKED_BACKEND_H
+/*
+ * Support for storing references in a `packed-refs` file.
+ *
+ * Note that this backend doesn't check for D/F conflicts, because it
+ * doesn't care about them. But usually it should be wrapped in a
+ * `files_ref_store` that prevents D/F conflicts from being created,
+ * even among packed refs.
+ */
+
struct ref_store *packed_ref_store_create(const char *path,
unsigned int store_flags);
/*
* Lock the packed-refs file for writing. Flags is passed to
- * hold_lock_file_for_update(). Return 0 on success. On errors, set
- * errno appropriately and return a nonzero value.
+ * hold_lock_file_for_update(). Return 0 on success. On errors, write
+ * an error message to `err` and return a nonzero value.
*/
-int packed_refs_lock(struct ref_store *ref_store, int flags);
+int packed_refs_lock(struct ref_store *ref_store, int flags, struct strbuf *err);
-void add_packed_ref(struct ref_store *ref_store,
- const char *refname, const struct object_id *oid);
+void packed_refs_unlock(struct ref_store *ref_store);
+int packed_refs_is_locked(struct ref_store *ref_store);
-int commit_packed_refs(struct ref_store *ref_store, struct strbuf *err);
-
-int repack_without_refs(struct ref_store *ref_store,
- struct string_list *refnames, struct strbuf *err);
+/*
+ * Return true if `transaction` really needs to be carried out against
+ * the specified packed_ref_store, or false if it can be skipped
+ * (i.e., because it is an obvious NOOP). `ref_store` must be locked
+ * before calling this function.
+ */
+int is_packed_transaction_needed(struct ref_store *ref_store,
+ struct ref_transaction *transaction);
#endif /* REFS_PACKED_BACKEND_H */