/**
* Validate that the public directory exists and is writable. Also
* adds / to non-absolute paths if absolutePaths is set to true.
*
* @return void
*/
protected static function validatePublicDir()
{
if (self::$_opt['publicDir'] === null) {
self::$_publicDir = self::$_outputDir;
} else {
self::$_publicDir = self::$_opt['publicDir'];
}
$char = substr(self::$_publicDir, 0, 1);
if (self::$_opt['absolutePaths'] === true && $char !== '/') {
self::$_publicDir = '/' . self::$_publicDir;
}
}