Niktux / karma

    private function backupFile($targetFile)

    {

        if($this->enableBackup === true)

        {

            if($this->sources->has($targetFile))

            {

                $backupFile = $targetFile . Application::BACKUP_SUFFIX;

                $this->sources->write($backupFile, $this->sources->read($targetFile), true);

            }

        }

    }

    public function rollback()

        $targetFile = substr($file, 0, strlen($this->suffix) * -1);

        $backupFile = $targetFile . Application::BACKUP_SUFFIX;

        if($this->sources->has($backupFile))

        {

            $this->info("  Writing $targetFile");

            if($this->dryRun === false)

            {

                $backupContent = $this->sources->read($backupFile);

                $this->sources->write($targetFile, $backupContent, true);

            }

        }

    }

}