/**
  * Perform a Backup.
  *
  * ## OPTIONS
  *
  * [--files_only]
  * : Backup files only, default to off
  *
  * [--database_only]
  * : Backup database only, defaults to off
  *
  * [--destination]
  * : dir that the backup should be save in, defaults to your existing backups directory
  *
  * [--root]
  * : dir that should be backed up, defaults to site root.
  *
  * [--zip_command_path]
  * : path to your zip binary, standard locations are automatically used
  *
  * [--mysqldump_command_path]
  * : path to your mysqldump binary, standard locations are automatically used
  *
  * [--archive_filename]
  * : filename for the resulting zip file
  *
  * [--excludes]
  * : list of paths you'd like to exclude
  *
  * ## Usage
  *
  *     wp backupwordpress backup [--files_only] [--database_only] [--path<dir>] [--root<dir>] [--zip_command_path=<path>] [--mysqldump_command_path=<path>]
  *
  * @todo errors should be bubbled from Backup, Scheduled_Backup and the like instead of being repeated.
  */
 public function backup($args, $assoc_args)
 {
     add_action('hmbkp_mysqldump_started', function () {
         WP_CLI::line(__('Backup: Dumping database...', 'backupwordpress'));
     });
     add_action('hmbkp_archive_started', function () {
         WP_CLI::line(__('Backup: Zipping everything up...', 'backupwordpress'));
     });
     $hm_backup = new Backup();
     if (!empty($assoc_args['destination'])) {
         Path::get_instance()->set_path($assoc_args['destination']);
     }
     Path::get_instance()->cleanup();
     if (!empty($assoc_args['root'])) {
         $hm_backup->set_root($assoc_args['root']);
     }
     if (!is_dir(hmbkp_path())) {
         WP_CLI::error(__('Invalid backup path', 'backupwordpress'));
         return false;
     }
     if (!is_dir($hm_backup->get_root()) || !is_readable($hm_backup->get_root())) {
         WP_CLI::error(__('Invalid root path', 'backupwordpress'));
         return false;
     }
     if (isset($assoc_args['archive_filename'])) {
         $hm_backup->set_archive_filename($assoc_args['archive_filename']);
     }
     if (!empty($assoc_args['files_only'])) {
         $hm_backup->set_type('file');
     }
     if (!empty($assoc_args['database_only'])) {
         $hm_backup->set_type('database');
     }
     if (isset($assoc_args['mysqldump_command_path'])) {
         $hm_backup->set_mysqldump_command_path($assoc_args['mysqldump_command_path']);
     }
     if (isset($assoc_args['zip_command_path'])) {
         $hm_backup->set_zip_command_path($assoc_args['zip_command_path']);
     }
     if (!empty($assoc_args['excludes'])) {
         $hm_backup->set_excludes($assoc_args['excludes']);
     }
     $hm_backup->backup();
     if (file_exists($hm_backup->get_archive_filepath())) {
         WP_CLI::success(__('Backup Complete: ', 'backupwordpress') . $hm_backup->get_archive_filepath());
     } else {
         WP_CLI::error(__('Backup Failed', 'backupwordpress'));
     }
 }