+++ /dev/null
-/*
- * 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.
- */
-
-#include "refdb.h"
-
-#include "git2/object.h"
-#include "git2/refs.h"
-#include "git2/refdb.h"
-#include "git2/sys/refdb_backend.h"
-
-#include "hash.h"
-#include "refs.h"
-#include "reflog.h"
-#include "posix.h"
-
-#define DEFAULT_NESTING_LEVEL 5
-#define MAX_NESTING_LEVEL 10
-
-int git_refdb_new(git_refdb **out, git_repository *repo)
-{
- git_refdb *db;
-
- GIT_ASSERT_ARG(out);
- GIT_ASSERT_ARG(repo);
-
- db = git__calloc(1, sizeof(*db));
- GIT_ERROR_CHECK_ALLOC(db);
-
- db->repo = repo;
-
- *out = db;
- GIT_REFCOUNT_INC(db);
- return 0;
-}
-
-int git_refdb_open(git_refdb **out, git_repository *repo)
-{
- git_refdb *db;
- git_refdb_backend *dir;
-
- GIT_ASSERT_ARG(out);
- GIT_ASSERT_ARG(repo);
-
- *out = NULL;
-
- if (git_refdb_new(&db, repo) < 0)
- return -1;
-
- /* Add the default (filesystem) backend */
- if (git_refdb_backend_fs(&dir, repo) < 0) {
- git_refdb_free(db);
- return -1;
- }
-
- db->repo = repo;
- db->backend = dir;
-
- *out = db;
- return 0;
-}
-
-static void refdb_free_backend(git_refdb *db)
-{
- if (db->backend)
- db->backend->free(db->backend);
-}
-
-int git_refdb_set_backend(git_refdb *db, git_refdb_backend *backend)
-{
- GIT_ERROR_CHECK_VERSION(backend, GIT_REFDB_BACKEND_VERSION, "git_refdb_backend");
-
- if (!backend->exists || !backend->lookup || !backend->iterator ||
- !backend->write || !backend->rename || !backend->del ||
- !backend->has_log || !backend->ensure_log || !backend->free ||
- !backend->reflog_read || !backend->reflog_write ||
- !backend->reflog_rename || !backend->reflog_delete ||
- (backend->lock && !backend->unlock)) {
- git_error_set(GIT_ERROR_REFERENCE, "incomplete refdb backend implementation");
- return GIT_EINVALID;
- }
-
- refdb_free_backend(db);
- db->backend = backend;
-
- return 0;
-}
-
-int git_refdb_compress(git_refdb *db)
-{
- GIT_ASSERT_ARG(db);
-
- if (db->backend->compress)
- return db->backend->compress(db->backend);
-
- return 0;
-}
-
-void git_refdb__free(git_refdb *db)
-{
- refdb_free_backend(db);
- git__memzero(db, sizeof(*db));
- git__free(db);
-}
-
-void git_refdb_free(git_refdb *db)
-{
- if (db == NULL)
- return;
-
- GIT_REFCOUNT_DEC(db, git_refdb__free);
-}
-
-int git_refdb_exists(int *exists, git_refdb *refdb, const char *ref_name)
-{
- GIT_ASSERT_ARG(exists);
- GIT_ASSERT_ARG(refdb);
- GIT_ASSERT_ARG(refdb->backend);
-
- return refdb->backend->exists(exists, refdb->backend, ref_name);
-}
-
-int git_refdb_lookup(git_reference **out, git_refdb *db, const char *ref_name)
-{
- git_reference *ref;
- int error;
-
- GIT_ASSERT_ARG(db);
- GIT_ASSERT_ARG(db->backend);
- GIT_ASSERT_ARG(out);
- GIT_ASSERT_ARG(ref_name);
-
- error = db->backend->lookup(&ref, db->backend, ref_name);
- if (error < 0)
- return error;
-
- GIT_REFCOUNT_INC(db);
- ref->db = db;
-
- *out = ref;
- return 0;
-}
-
-int git_refdb_resolve(
- git_reference **out,
- git_refdb *db,
- const char *ref_name,
- int max_nesting)
-{
- git_reference *ref = NULL;
- int error = 0, nesting;
-
- *out = NULL;
-
- if (max_nesting > MAX_NESTING_LEVEL)
- max_nesting = MAX_NESTING_LEVEL;
- else if (max_nesting < 0)
- max_nesting = DEFAULT_NESTING_LEVEL;
-
- if ((error = git_refdb_lookup(&ref, db, ref_name)) < 0)
- goto out;
-
- for (nesting = 0; nesting < max_nesting; nesting++) {
- git_reference *resolved;
-
- if (ref->type == GIT_REFERENCE_DIRECT)
- break;
-
- if ((error = git_refdb_lookup(&resolved, db, git_reference_symbolic_target(ref))) < 0) {
- /* If we found a symbolic reference with a nonexistent target, return it. */
- if (error == GIT_ENOTFOUND) {
- error = 0;
- *out = ref;
- ref = NULL;
- }
- goto out;
- }
-
- git_reference_free(ref);
- ref = resolved;
- }
-
- if (ref->type != GIT_REFERENCE_DIRECT && max_nesting != 0) {
- git_error_set(GIT_ERROR_REFERENCE,
- "cannot resolve reference (>%u levels deep)", max_nesting);
- error = -1;
- goto out;
- }
-
- *out = ref;
- ref = NULL;
-out:
- git_reference_free(ref);
- return error;
-}
-
-int git_refdb_iterator(git_reference_iterator **out, git_refdb *db, const char *glob)
-{
- int error;
-
- if (!db->backend || !db->backend->iterator) {
- git_error_set(GIT_ERROR_REFERENCE, "this backend doesn't support iterators");
- return -1;
- }
-
- if ((error = db->backend->iterator(out, db->backend, glob)) < 0)
- return error;
-
- GIT_REFCOUNT_INC(db);
- (*out)->db = db;
-
- return 0;
-}
-
-int git_refdb_iterator_next(git_reference **out, git_reference_iterator *iter)
-{
- int error;
-
- if ((error = iter->next(out, iter)) < 0)
- return error;
-
- GIT_REFCOUNT_INC(iter->db);
- (*out)->db = iter->db;
-
- return 0;
-}
-
-int git_refdb_iterator_next_name(const char **out, git_reference_iterator *iter)
-{
- return iter->next_name(out, iter);
-}
-
-void git_refdb_iterator_free(git_reference_iterator *iter)
-{
- GIT_REFCOUNT_DEC(iter->db, git_refdb__free);
- iter->free(iter);
-}
-
-int git_refdb_write(git_refdb *db, git_reference *ref, int force, const git_signature *who, const char *message, const git_oid *old_id, const char *old_target)
-{
- GIT_ASSERT_ARG(db);
- GIT_ASSERT_ARG(db->backend);
-
- GIT_REFCOUNT_INC(db);
- ref->db = db;
-
- return db->backend->write(db->backend, ref, force, who, message, old_id, old_target);
-}
-
-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 error;
-
- GIT_ASSERT_ARG(db);
- GIT_ASSERT_ARG(db->backend);
-
- error = db->backend->rename(out, db->backend, old_name, new_name, force, who, message);
- if (error < 0)
- return error;
-
- if (out) {
- GIT_REFCOUNT_INC(db);
- (*out)->db = db;
- }
-
- return 0;
-}
-
-int git_refdb_delete(struct git_refdb *db, const char *ref_name, const git_oid *old_id, const char *old_target)
-{
- GIT_ASSERT_ARG(db);
- GIT_ASSERT_ARG(db->backend);
-
- return db->backend->del(db->backend, ref_name, old_id, old_target);
-}
-
-int git_refdb_reflog_read(git_reflog **out, git_refdb *db, const char *name)
-{
- int error;
-
- GIT_ASSERT_ARG(db);
- GIT_ASSERT_ARG(db->backend);
-
- if ((error = db->backend->reflog_read(out, db->backend, name)) < 0)
- return error;
-
- GIT_REFCOUNT_INC(db);
- (*out)->db = db;
-
- return 0;
-}
-
-int git_refdb_should_write_reflog(int *out, git_refdb *db, const git_reference *ref)
-{
- int error, logall;
-
- error = git_repository__configmap_lookup(&logall, db->repo, GIT_CONFIGMAP_LOGALLREFUPDATES);
- if (error < 0)
- return error;
-
- /* Defaults to the opposite of the repo being bare */
- if (logall == GIT_LOGALLREFUPDATES_UNSET)
- logall = !git_repository_is_bare(db->repo);
-
- *out = 0;
- switch (logall) {
- case GIT_LOGALLREFUPDATES_FALSE:
- *out = 0;
- break;
-
- case GIT_LOGALLREFUPDATES_TRUE:
- /* Only write if it already has a log,
- * or if it's under heads/, remotes/ or notes/
- */
- *out = git_refdb_has_log(db, ref->name) ||
- !git__prefixcmp(ref->name, GIT_REFS_HEADS_DIR) ||
- !git__strcmp(ref->name, GIT_HEAD_FILE) ||
- !git__prefixcmp(ref->name, GIT_REFS_REMOTES_DIR) ||
- !git__prefixcmp(ref->name, GIT_REFS_NOTES_DIR);
- break;
-
- case GIT_LOGALLREFUPDATES_ALWAYS:
- *out = 1;
- break;
- }
-
- return 0;
-}
-
-int git_refdb_should_write_head_reflog(int *out, git_refdb *db, const git_reference *ref)
-{
- git_reference *head = NULL, *resolved = NULL;
- const char *name;
- int error;
-
- *out = 0;
-
- if (ref->type == GIT_REFERENCE_SYMBOLIC) {
- error = 0;
- goto out;
- }
-
- if ((error = git_refdb_lookup(&head, db, GIT_HEAD_FILE)) < 0)
- goto out;
-
- if (git_reference_type(head) == GIT_REFERENCE_DIRECT)
- goto out;
-
- /* Go down the symref chain until we find the branch */
- if ((error = git_refdb_resolve(&resolved, db, git_reference_symbolic_target(head), -1)) < 0) {
- if (error != GIT_ENOTFOUND)
- goto out;
- error = 0;
- name = git_reference_symbolic_target(head);
- } else if (git_reference_type(resolved) == GIT_REFERENCE_SYMBOLIC) {
- name = git_reference_symbolic_target(resolved);
- } else {
- name = git_reference_name(resolved);
- }
-
- if (strcmp(name, ref->name))
- goto out;
-
- *out = 1;
-
-out:
- git_reference_free(resolved);
- git_reference_free(head);
- return error;
-}
-
-int git_refdb_has_log(git_refdb *db, const char *refname)
-{
- GIT_ASSERT_ARG(db);
- GIT_ASSERT_ARG(refname);
-
- return db->backend->has_log(db->backend, refname);
-}
-
-int git_refdb_ensure_log(git_refdb *db, const char *refname)
-{
- GIT_ASSERT_ARG(db);
- GIT_ASSERT_ARG(refname);
-
- return db->backend->ensure_log(db->backend, refname);
-}
-
-int git_refdb_init_backend(git_refdb_backend *backend, unsigned int version)
-{
- GIT_INIT_STRUCTURE_FROM_TEMPLATE(
- backend, version, git_refdb_backend, GIT_REFDB_BACKEND_INIT);
- return 0;
-}
-
-int git_refdb_lock(void **payload, git_refdb *db, const char *refname)
-{
- GIT_ASSERT_ARG(payload);
- GIT_ASSERT_ARG(db);
- GIT_ASSERT_ARG(refname);
-
- if (!db->backend->lock) {
- git_error_set(GIT_ERROR_REFERENCE, "backend does not support locking");
- return -1;
- }
-
- return db->backend->lock(payload, db->backend, 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)
-{
- GIT_ASSERT_ARG(db);
-
- return db->backend->unlock(db->backend, payload, success, update_reflog, ref, sig, message);
-}
projects / libgit2.git / blobdiff