+ notmuch = talloc_zero (NULL, notmuch_database_t);
+ if (! notmuch)
+ return NULL;
+
+ notmuch->exception_reported = false;
+ notmuch->status_string = NULL;
+ notmuch->writable_xapian_db = NULL;
+ notmuch->atomic_nesting = 0;
+ notmuch->view = 1;
+ return notmuch;
+}
+
+static notmuch_status_t
+_trial_open (const char *xapian_path, char **message_ptr)
+{
+ try {
+ Xapian::Database db (xapian_path);
+ } catch (const Xapian::DatabaseOpeningError &error) {
+ IGNORE_RESULT (asprintf (message_ptr,
+ "Cannot open Xapian database at %s: %s\n",
+ xapian_path,
+ error.get_msg ().c_str ()));
+ return NOTMUCH_STATUS_PATH_ERROR;
+ } catch (const Xapian::Error &error) {
+ IGNORE_RESULT (asprintf (message_ptr,
+ "A Xapian exception occurred opening database: %s\n",
+ error.get_msg ().c_str ()));
+ return NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ }
+ return NOTMUCH_STATUS_SUCCESS;
+}
+
+static notmuch_status_t
+_choose_xapian_path (void *ctx, const char *database_path, const char **xapian_path,
+ char **message_ptr)
+{
+ notmuch_status_t status;
+ const char *trial_path, *notmuch_path;
+
+ status = _db_dir_exists (database_path, message_ptr);
+ if (status)