private static function writeBootstrap($bootstrap, $extras, $webDirectory, $ciBasePath)
{
$template = self::getBootstrapConfigTemplate();
$applicationDirectory = Filesystem::getRelativePath(realpath($extras['ci-app-dir']), $webDirectory);
$systemDirectory = Filesystem::getRelativePath(realpath("{$ciBasePath}/system"), $webDirectory);
$projectBasePath = Filesystem::getRelativePath(realpath("."), $webDirectory);
$template = str_replace(array('{APPLICATION_ENV}', '{CI_SYSTEM_PATH}', '{APPLICATION_DIR}', '{CIX_SYSTEM_PATH}'), array(self::$environment, $systemDirectory, $applicationDirectory, $projectBasePath), $template);
file_put_contents($bootstrap, $template);
}
