Bolt\Configuration\Validation\Database::doDatabaseSqliteCheck PHP Method

    protected function doDatabaseSqliteCheck(Controller\Exception $exceptionController, array $dbConfig)
    {
        if (extension_loaded('pdo_sqlite') === false) {
            return $exceptionController->databaseDriver('missing', 'SQLite', 'pdo_sqlite');
        }
        // If in-memory connection, skip path checks
        if (isset($dbConfig['memory']) && $dbConfig['memory'] === true) {
            return null;
        }
        $fs = new Filesystem();
        $file = $dbConfig['path'];
        // If the file is present, make sure it is writable
        if ($fs->exists($file)) {
            try {
                $fs->touch($file);
            } catch (IOException $e) {
                return $exceptionController->databasePath('file', $file, 'is not writable');
            }
            return null;
        }
        // If the file isn't present, make sure the directory
        // exists and is writable so the file can be created
        $dir = dirname($file);
        if (!$fs->exists($dir)) {
            // At this point, it is possible that the site has been moved and
            // the configured Sqlite database file path is no longer relevant
            // to the site's root path
            $cacheJson = $this->resourceManager->getPath('cache/config-cache.json');
            if ($fs->exists($cacheJson)) {
                $fs->remove($cacheJson);
                $this->config->initialize();
                if (!$fs->exists($dir)) {
                    return $exceptionController->databasePath('folder', $dir, 'does not exist');
                }
            } else {
                return $exceptionController->databasePath('folder', $dir, 'does not exist');
            }
        }
        try {
            $fs->touch($dir);
        } catch (IOException $e) {
            return $exceptionController->databasePath('folder', $dir, 'is not writable');
        }
        return null;
    }