1 files changed, 128 insertions, 0 deletions
diff --git a/src/libgit2/refdb.h b/src/libgit2/refdb.h
new file mode 100644
index 000000000..84e19b1c3
--- /dev/null
+++ b/src/libgit2/refdb.h
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_refdb_h__
+#define INCLUDE_refdb_h__
+
+#include "common.h"
+
+#include "git2/refdb.h"
+#include "repository.h"
+
+struct git_refdb {
+	git_refcount rc;
+	git_repository *repo;
+	git_refdb_backend *backend;
+};
+
+void git_refdb__free(git_refdb *db);
+
+int git_refdb_exists(
+	int *exists,
+	git_refdb *refdb,
+	const char *ref_name);
+
+int git_refdb_lookup(
+	git_reference **out,
+	git_refdb *refdb,
+	const char *ref_name);
+
+/**
+ * Resolve the reference by following symbolic references.
+ *
+ * Given a reference name, this function will follow any symbolic references up
+ * to `max_nesting` deep and return the resolved direct reference. If any of
+ * the intermediate symbolic references points to a non-existing reference,
+ * then that symbolic reference is returned instead with an error code of `0`.
+ * If the given reference is a direct reference already, it is returned
+ * directly.
+ *
+ * If `max_nesting` is `0`, the reference will not be resolved. If it's
+ * negative, it will be set to the default resolve depth which is `5`.
+ *
+ * @param out Pointer to store the result in.
+ * @param db The refdb to use for resolving the reference.
+ * @param ref_name The reference name to lookup and resolve.
+ * @param max_nesting The maximum nesting depth.
+ * @return `0` on success, a negative error code otherwise.
+ */
+int git_refdb_resolve(
+	git_reference **out,
+	git_refdb *db,
+	const char *ref_name,
+	int max_nesting);
+
+int git_refdb_rename(
+	git_reference **out,
+	git_refdb *db,
+	const char *old_name,
+	const char *new_name,
+	int force,
+	const git_signature *who,
+	const char *message);
+
+int git_refdb_iterator(git_reference_iterator **out, git_refdb *db, const char *glob);
+int git_refdb_iterator_next(git_reference **out, git_reference_iterator *iter);
+int git_refdb_iterator_next_name(const char **out, git_reference_iterator *iter);
+void git_refdb_iterator_free(git_reference_iterator *iter);
+
+int git_refdb_write(git_refdb *refdb, git_reference *ref, int force, const git_signature *who, const char *message, const git_oid *old_id, const char *old_target);
+int git_refdb_delete(git_refdb *refdb, const char *ref_name, const git_oid *old_id, const char *old_target);
+
+int git_refdb_reflog_read(git_reflog **out, git_refdb *db,  const char *name);
+int git_refdb_reflog_write(git_reflog *reflog);
+
+/**
+ * Determine whether a reflog entry should be created for the given reference.
+ *
+ * Whether or not writing to a reference should create a reflog entry is
+ * dependent on a number of things. Most importantly, there's the
+ * "core.logAllRefUpdates" setting that controls in which situations a
+ * reference should get a corresponding reflog entry. The following values for
+ * it are understood:
+ *
+ *     - "false": Do not log reference updates.
+ *
+ *     - "true": Log normal reference updates. This will write entries for
+ *               references in "refs/heads", "refs/remotes", "refs/notes" and
+ *               "HEAD" or if the reference already has a log entry.
+ *
+ *     - "always": Always create a reflog entry.
+ *
+ * If unset, the value will default to "true" for non-bare repositories and
+ * "false" for bare ones.
+ *
+ * @param out pointer to which the result will be written, `1` means a reflog
+ *            entry should be written, `0` means none should be written.
+ * @param db The refdb to decide this for.
+ * @param ref The reference one wants to check.
+ * @return `0` on success, a negative error code otherwise.
+ */
+int git_refdb_should_write_reflog(int *out, git_refdb *db, const git_reference *ref);
+
+/**
+ * Determine whether a reflog entry should be created for HEAD if creating one
+ * for the given reference
+ *
+ * In case the given reference is being pointed to by HEAD, then creating a
+ * reflog entry for this reference also requires us to create a corresponding
+ * reflog entry for HEAD. This function can be used to determine that scenario.
+ *
+ * @param out pointer to which the result will be written, `1` means a reflog
+ *            entry should be written, `0` means none should be written.
+ * @param db The refdb to decide this for.
+ * @param ref The reference one wants to check.
+ * @return `0` on success, a negative error code otherwise.
+ */
+int git_refdb_should_write_head_reflog(int *out, git_refdb *db, const git_reference *ref);
+
+int git_refdb_has_log(git_refdb *db, const char *refname);
+int git_refdb_ensure_log(git_refdb *refdb, const char *refname);
+
+int git_refdb_lock(void **payload, git_refdb *db, const char *refname);
+int git_refdb_unlock(git_refdb *db, void *payload, int success, int update_reflog, const git_reference *ref, const git_signature *sig, const char *message);
+
+#endif