/**
* Build graph from provided sources
*/
public function build()
{
$context = new Context();
$global = $context->time('compiler');
$timer = $context->time('compiler:parse');
$ast = (new ArrayTreeBuilder())->parse($this->buildRawArray($context));
$timer->stop();
// We have a "naked" AST with no business meaning whatsover, now we
// need to process low level and meaningless transformations, such
// as macro processing
$context->setGraph($ast);
// First, macro processing, this will deeply change the graph, so it
// needs to happen first and alone, prior to anything else
$timer = $context->time('compiler:macro');
$visitor = new Visitor();
$visitor->addProcessor(new MacroPass());
$visitor->execute($ast, $context);
$timer->stop();
// Same goes for inheritance, it is business-free and low level
$timer = $context->time('compiler:inheritance');
$visitor = new Visitor();
$visitor->addProcessor(new InheritancePass());
$visitor->execute($ast, $context);
$timer->stop();
// Then, we need to have a business mean-something graph, so let's
// apply path map conversion, so let's go!
$timer = $context->time('compiler:conversion');
$visitor = new Visitor();
$visitor->addProcessor(new BusinessConversionPass());
$visitor->execute($ast, $context);
$timer->stop();
// From this point, graph should not be modified anymore, which means
// we can safely count nodes from this point
$timer = $context->time('compiler:attributes');
$visitor = new Visitor();
$visitor->addProcessor(new CountPass());
$visitor->addProcessor(new ExpressionProcessor());
$visitor->addProcessor(new DrupalAttributesProcessor());
$visitor->execute($ast, $context);
$timer->stop();
$global->stop();
return $context;
}
/**
* Extract meaningfull objects from the graph, and apply dependency sort
*
* @param Context $context
* @param LoaderInterface[] $loaders
*/
protected function extractObjects(Context $context, array $loaders)
{
$dependencyMap = [];
$timer = $context->time('loader:extract');
$visitor = new Visitor();
$visitor->addProcessor(function (NodeInterface $node, Context $context) use($loaders, &$dependencyMap) {
$path = $node->getPath();
foreach ($loaders as $loader) {
if ($loader->canProcess($node)) {
$dependencyMap[$path] = [];
foreach ($loader->getDependencies($node, $context) as $dependency) {
$dependencyMap[$path][] = $dependency;
}
}
}
});
$visitor->execute($context->getGraph(), $context);
$timer->stop();
return $this->resolveDependencies($dependencyMap, $context);
}