/**
* Tries to add any custom extensions that have been defined in the template or the transformation's configuration.
*
* This method will read the `twig-extension` parameter of the transformation (which inherits the template's
* parameter set) and try to add those extensions to the environment.
*
* @param Transformation $transformation
* @param ProjectDescriptor $project
* @param \Twig_Environment $twigEnvironment
*
* @throws \InvalidArgumentException if a twig-extension should be loaded but it could not be found.
*
* @return void
*/
protected function addExtensionsFromTemplateConfiguration(Transformation $transformation, ProjectDescriptor $project, \Twig_Environment $twigEnvironment)
{
$isDebug = $transformation->getParameter('twig-debug') ? $transformation->getParameter('twig-debug')->getValue() : false;
if ($isDebug == 'true') {
$twigEnvironment->enableDebug();
$twigEnvironment->enableAutoReload();
$twigEnvironment->addExtension(new \Twig_Extension_Debug());
}
/** @var Template\Parameter $extension */
foreach ($transformation->getParametersWithKey('twig-extension') as $extension) {
$extensionValue = $extension->getValue();
if (!class_exists($extensionValue)) {
throw new \InvalidArgumentException('Unknown twig extension: ' . $extensionValue);
}
// to support 'normal' Twig extensions we check the interface to determine what instantiation to do.
$implementsInterface = in_array('phpDocumentor\\Plugin\\Twig\\ExtensionInterface', class_implements($extensionValue));
$twigEnvironment->addExtension($implementsInterface ? new $extensionValue($project, $transformation) : new $extensionValue());
}
}