migration symfony 5 4 (#300)

* symfony 5.4 (diff dev)

* symfony 5.4 (working)

* symfony 5.4 (update autoload)

* symfony 5.4 (remove swiftmailer mailer implementation)

* symfony 5.4 (php doc and split Global accessor class)


### Impacted packages:

composer require php:">=7.2.5 <8.0.0" symfony/console:5.4.* symfony/dotenv:5.4.* symfony/framework-bundle:5.4.* symfony/twig-bundle:5.4.* symfony/yaml:5.4.* --update-with-dependencies

composer require symfony/stopwatch:5.4.* symfony/web-profiler-bundle:5.4.* --dev --update-with-dependencies

lib/symfony/dependency-injection/Compiler/ResolveDecoratorStackPass.php

@@ -0,0 +1,131 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\Alias;
+use Symfony\Component\DependencyInjection\ChildDefinition;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ResolveDecoratorStackPass implements CompilerPassInterface
+{
+    private $tag;
+
+    public function __construct(string $tag = 'container.stack')
+    {
+        if (0 < \func_num_args()) {
+            trigger_deprecation('symfony/dependency-injection', '5.3', 'Configuring "%s" is deprecated.', __CLASS__);
+        }
+
+        $this->tag = $tag;
+    }
+
+    public function process(ContainerBuilder $container)
+    {
+        $stacks = [];
+
+        foreach ($container->findTaggedServiceIds($this->tag) as $id => $tags) {
+            $definition = $container->getDefinition($id);
+
+            if (!$definition instanceof ChildDefinition) {
+                throw new InvalidArgumentException(sprintf('Invalid service "%s": only definitions with a "parent" can have the "%s" tag.', $id, $this->tag));
+            }
+
+            if (!$stack = $definition->getArguments()) {
+                throw new InvalidArgumentException(sprintf('Invalid service "%s": the stack of decorators is empty.', $id));
+            }
+
+            $stacks[$id] = $stack;
+        }
+
+        if (!$stacks) {
+            return;
+        }
+
+        $resolvedDefinitions = [];
+
+        foreach ($container->getDefinitions() as $id => $definition) {
+            if (!isset($stacks[$id])) {
+                $resolvedDefinitions[$id] = $definition;
+                continue;
+            }
+
+            foreach (array_reverse($this->resolveStack($stacks, [$id]), true) as $k => $v) {
+                $resolvedDefinitions[$k] = $v;
+            }
+
+            $alias = $container->setAlias($id, $k);
+
+            if ($definition->getChanges()['public'] ?? false) {
+                $alias->setPublic($definition->isPublic());
+            }
+
+            if ($definition->isDeprecated()) {
+                $alias->setDeprecated(...array_values($definition->getDeprecation('%alias_id%')));
+            }
+        }
+
+        $container->setDefinitions($resolvedDefinitions);
+    }
+
+    private function resolveStack(array $stacks, array $path): array
+    {
+        $definitions = [];
+        $id = end($path);
+        $prefix = '.'.$id.'.';
+
+        if (!isset($stacks[$id])) {
+            return [$id => new ChildDefinition($id)];
+        }
+
+        if (key($path) !== $searchKey = array_search($id, $path)) {
+            throw new ServiceCircularReferenceException($id, \array_slice($path, $searchKey));
+        }
+
+        foreach ($stacks[$id] as $k => $definition) {
+            if ($definition instanceof ChildDefinition && isset($stacks[$definition->getParent()])) {
+                $path[] = $definition->getParent();
+                $definition = unserialize(serialize($definition)); // deep clone
+            } elseif ($definition instanceof Definition) {
+                $definitions[$decoratedId = $prefix.$k] = $definition;
+                continue;
+            } elseif ($definition instanceof Reference || $definition instanceof Alias) {
+                $path[] = (string) $definition;
+            } else {
+                throw new InvalidArgumentException(sprintf('Invalid service "%s": unexpected value of type "%s" found in the stack of decorators.', $id, get_debug_type($definition)));
+            }
+
+            $p = $prefix.$k;
+
+            foreach ($this->resolveStack($stacks, $path) as $k => $v) {
+                $definitions[$decoratedId = $p.$k] = $definition instanceof ChildDefinition ? $definition->setParent($k) : new ChildDefinition($k);
+                $definition = null;
+            }
+            array_pop($path);
+        }
+
+        if (1 === \count($path)) {
+            foreach ($definitions as $k => $definition) {
+                $definition->setPublic(false)->setTags([])->setDecoratedService($decoratedId);
+            }
+            $definition->setDecoratedService(null);
+        }
+
+        return $definitions;
+    }
+}