Update Composer, update everything

vendor/symfony/dependency-injection/.gitignore

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+vendor/
+composer.lock
+phpunit.xml

vendor/symfony/dependency-injection/Alias.php

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+<?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;
+
+class Alias
+{
+    private $id;
+    private $public;
+    private $private;
+
+    /**
+     * @param string $id     Alias identifier
+     * @param bool   $public If this alias is public
+     */
+    public function __construct($id, $public = true)
+    {
+        $this->id = (string) $id;
+        $this->public = $public;
+        $this->private = 2 > \func_num_args();
+    }
+
+    /**
+     * Checks if this DI Alias should be public or not.
+     *
+     * @return bool
+     */
+    public function isPublic()
+    {
+        return $this->public;
+    }
+
+    /**
+     * Sets if this Alias is public.
+     *
+     * @param bool $boolean If this Alias should be public
+     *
+     * @return $this
+     */
+    public function setPublic($boolean)
+    {
+        $this->public = (bool) $boolean;
+        $this->private = false;
+
+        return $this;
+    }
+
+    /**
+     * Sets if this Alias is private.
+     *
+     * When set, the "private" state has a higher precedence than "public".
+     * In version 3.4, a "private" alias always remains publicly accessible,
+     * but triggers a deprecation notice when accessed from the container,
+     * so that the alias can be made really private in 4.0.
+     *
+     * @param bool $boolean
+     *
+     * @return $this
+     */
+    public function setPrivate($boolean)
+    {
+        $this->private = (bool) $boolean;
+
+        return $this;
+    }
+
+    /**
+     * Whether this alias is private.
+     *
+     * @return bool
+     */
+    public function isPrivate()
+    {
+        return $this->private;
+    }
+
+    /**
+     * Returns the Id of this alias.
+     *
+     * @return string The alias id
+     */
+    public function __toString()
+    {
+        return $this->id;
+    }
+}

vendor/symfony/dependency-injection/Argument/ArgumentInterface.php

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+<?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\Argument;
+
+/**
+ * Represents a complex argument containing nested values.
+ *
+ * @author Titouan Galopin <galopintitouan@gmail.com>
+ */
+interface ArgumentInterface
+{
+    /**
+     * @return array
+     */
+    public function getValues();
+
+    public function setValues(array $values);
+}

vendor/symfony/dependency-injection/Argument/BoundArgument.php

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+<?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\Argument;
+
+/**
+ * @author Guilhem Niot <guilhem.niot@gmail.com>
+ */
+final class BoundArgument implements ArgumentInterface
+{
+    private static $sequence = 0;
+
+    private $value;
+    private $identifier;
+    private $used;
+
+    public function __construct($value)
+    {
+        $this->value = $value;
+        $this->identifier = ++self::$sequence;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getValues()
+    {
+        return array($this->value, $this->identifier, $this->used);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setValues(array $values)
+    {
+        list($this->value, $this->identifier, $this->used) = $values;
+    }
+}

vendor/symfony/dependency-injection/Argument/IteratorArgument.php

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+<?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\Argument;
+
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Represents a collection of values to lazily iterate over.
+ *
+ * @author Titouan Galopin <galopintitouan@gmail.com>
+ */
+class IteratorArgument implements ArgumentInterface
+{
+    private $values;
+
+    /**
+     * @param Reference[] $values
+     */
+    public function __construct(array $values)
+    {
+        $this->setValues($values);
+    }
+
+    /**
+     * @return array The values to lazily iterate over
+     */
+    public function getValues()
+    {
+        return $this->values;
+    }
+
+    /**
+     * @param Reference[] $values The service references to lazily iterate over
+     */
+    public function setValues(array $values)
+    {
+        foreach ($values as $k => $v) {
+            if (null !== $v && !$v instanceof Reference) {
+                throw new InvalidArgumentException(sprintf('An IteratorArgument must hold only Reference instances, "%s" given.', \is_object($v) ? \get_class($v) : \gettype($v)));
+            }
+        }
+
+        $this->values = $values;
+    }
+}

vendor/symfony/dependency-injection/Argument/RewindableGenerator.php

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+<?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\Argument;
+
+/**
+ * @internal
+ */
+class RewindableGenerator implements \IteratorAggregate, \Countable
+{
+    private $generator;
+    private $count;
+
+    /**
+     * @param callable     $generator
+     * @param int|callable $count
+     */
+    public function __construct(callable $generator, $count)
+    {
+        $this->generator = $generator;
+        $this->count = $count;
+    }
+
+    public function getIterator()
+    {
+        $g = $this->generator;
+
+        return $g();
+    }
+
+    public function count()
+    {
+        if (\is_callable($count = $this->count)) {
+            $this->count = $count();
+        }
+
+        return $this->count;
+    }
+}

vendor/symfony/dependency-injection/Argument/ServiceClosureArgument.php

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+<?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\Argument;
+
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Represents a service wrapped in a memoizing closure.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ServiceClosureArgument implements ArgumentInterface
+{
+    private $values;
+
+    public function __construct(Reference $reference)
+    {
+        $this->values = array($reference);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getValues()
+    {
+        return $this->values;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setValues(array $values)
+    {
+        if (array(0) !== array_keys($values) || !($values[0] instanceof Reference || null === $values[0])) {
+            throw new InvalidArgumentException('A ServiceClosureArgument must hold one and only one Reference.');
+        }
+
+        $this->values = $values;
+    }
+}

vendor/symfony/dependency-injection/Argument/TaggedIteratorArgument.php

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+<?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\Argument;
+
+/**
+ * Represents a collection of services found by tag name to lazily iterate over.
+ *
+ * @author Roland Franssen <franssen.roland@gmail.com>
+ */
+class TaggedIteratorArgument extends IteratorArgument
+{
+    private $tag;
+
+    /**
+     * @param string $tag
+     */
+    public function __construct($tag)
+    {
+        parent::__construct(array());
+
+        $this->tag = (string) $tag;
+    }
+
+    public function getTag()
+    {
+        return $this->tag;
+    }
+}

vendor/symfony/dependency-injection/CHANGELOG.md

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+CHANGELOG
+=========
+
+3.4.0
+-----
+
+ * moved the `ExtensionCompilerPass` to before-optimization passes with priority -1000
+ * deprecated "public-by-default" definitions and aliases, the new default will be "private" in 4.0
+ * added `EnvVarProcessorInterface` and corresponding "container.env_var_processor" tag for processing env vars
+ * added support for ignore-on-uninitialized references
+ * deprecated service auto-registration while autowiring
+ * deprecated the ability to check for the initialization of a private service with the `Container::initialized()` method
+ * deprecated support for top-level anonymous services in XML
+ * deprecated case insensitivity of parameter names
+ * deprecated the `ResolveDefinitionTemplatesPass` class in favor of `ResolveChildDefinitionsPass`
+ * added `TaggedIteratorArgument` with YAML (`!tagged foo`) and XML (`<service type="tagged"/>`) support
+ * deprecated `AutowireExceptionPass` and `AutowirePass::getAutowiringExceptions()`, use `Definition::addError()` and the `DefinitionErrorExceptionPass` instead
+
+
+3.3.0
+-----
+
+ * deprecated autowiring services based on the types they implement;
+   rename (or alias) your services to their FQCN id to make them autowirable
+ * added "ServiceSubscriberInterface" - to allow for per-class explicit service-locator definitions
+ * added "container.service_locator" tag for defining service-locator services
+ * added anonymous services support in YAML configuration files using the `!service` tag.
+ * added "TypedReference" and "ServiceClosureArgument" for creating service-locator services
+ * added `ServiceLocator` - a PSR-11 container holding a set of services to be lazily loaded
+ * added "instanceof" section for local interface-defined configs
+ * added prototype services for PSR4-based discovery and registration
+ * added `ContainerBuilder::getReflectionClass()` for retrieving and tracking reflection class info
+ * deprecated `ContainerBuilder::getClassResource()`, use `ContainerBuilder::getReflectionClass()` or `ContainerBuilder::addObjectResource()` instead
+ * added `ContainerBuilder::fileExists()` for checking and tracking file or directory existence
+ * deprecated autowiring-types, use aliases instead
+ * added support for omitting the factory class name in a service definition if the definition class is set
+ * deprecated case insensitivity of service identifiers
+ * added "iterator" argument type for lazy iteration over a set of values and services
+ * added file-wide configurable defaults for service attributes "public", "tags",
+   "autowire" and "autoconfigure"
+ * made the "class" attribute optional, using the "id" as fallback
+ * using the `PhpDumper` with an uncompiled `ContainerBuilder` is deprecated and
+   will not be supported anymore in 4.0
+ * deprecated the `DefinitionDecorator` class in favor of `ChildDefinition`
+ * allow config files to be loaded using a glob pattern
+ * [BC BREAK] the `NullDumper` class is now final
+
+3.2.0
+-----
+
+ * allowed to prioritize compiler passes by introducing a third argument to `PassConfig::addPass()`, to `Compiler::addPass` and to `ContainerBuilder::addCompilerPass()`
+ * added support for PHP constants in YAML configuration files
+ * deprecated the ability to set or unset a private service with the `Container::set()` method
+ * deprecated the ability to check for the existence of a private service with the `Container::has()` method
+ * deprecated the ability to request a private service with the `Container::get()` method
+ * deprecated support for generating a dumped `Container` without populating the method map
+
+3.0.0
+-----
+
+ * removed all deprecated codes from 2.x versions
+
+2.8.0
+-----
+
+ * deprecated the abstract ContainerAware class in favor of ContainerAwareTrait
+ * deprecated IntrospectableContainerInterface, to be merged with ContainerInterface in 3.0
+ * allowed specifying a directory to recursively load all configuration files it contains
+ * deprecated the concept of scopes
+ * added `Definition::setShared()` and `Definition::isShared()`
+ * added ResettableContainerInterface to be able to reset the container to release memory on shutdown
+ * added a way to define the priority of service decoration
+ * added support for service autowiring
+
+2.7.0
+-----
+
+ * deprecated synchronized services
+
+2.6.0
+-----
+
+ * added new factory syntax and deprecated the old one
+
+2.5.0
+-----
+
+* added DecoratorServicePass and a way to override a service definition (Definition::setDecoratedService())
+* deprecated SimpleXMLElement class.
+
+2.4.0
+-----
+
+ * added support for expressions in service definitions
+ * added ContainerAwareTrait to add default container aware behavior to a class
+
+2.2.0
+-----
+
+ * added Extension::isConfigEnabled() to ease working with enableable configurations
+ * added an Extension base class with sensible defaults to be used in conjunction
+   with the Config component.
+ * added PrependExtensionInterface (to be able to allow extensions to prepend
+   application configuration settings for any Bundle)
+
+2.1.0
+-----
+
+ * added IntrospectableContainerInterface (to be able to check if a service
+   has been initialized or not)
+ * added ConfigurationExtensionInterface
+ * added Definition::clearTag()
+ * component exceptions that inherit base SPL classes are now used exclusively
+   (this includes dumped containers)
+ * [BC BREAK] fixed unescaping of class arguments, method
+   ParameterBag::unescapeValue() was made public

vendor/symfony/dependency-injection/ChildDefinition.php

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+<?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;
+
+use Symfony\Component\DependencyInjection\Exception\BadMethodCallException;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\OutOfBoundsException;
+
+/**
+ * This definition extends another definition.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ChildDefinition extends Definition
+{
+    private $parent;
+
+    /**
+     * @param string $parent The id of Definition instance to decorate
+     */
+    public function __construct($parent)
+    {
+        $this->parent = $parent;
+        $this->setPrivate(false);
+    }
+
+    /**
+     * Returns the Definition to inherit from.
+     *
+     * @return string
+     */
+    public function getParent()
+    {
+        return $this->parent;
+    }
+
+    /**
+     * Sets the Definition to inherit from.
+     *
+     * @param string $parent
+     *
+     * @return $this
+     */
+    public function setParent($parent)
+    {
+        $this->parent = $parent;
+
+        return $this;
+    }
+
+    /**
+     * Gets an argument to pass to the service constructor/factory method.
+     *
+     * If replaceArgument() has been used to replace an argument, this method
+     * will return the replacement value.
+     *
+     * @param int|string $index
+     *
+     * @return mixed The argument value
+     *
+     * @throws OutOfBoundsException When the argument does not exist
+     */
+    public function getArgument($index)
+    {
+        if (array_key_exists('index_'.$index, $this->arguments)) {
+            return $this->arguments['index_'.$index];
+        }
+
+        return parent::getArgument($index);
+    }
+
+    /**
+     * You should always use this method when overwriting existing arguments
+     * of the parent definition.
+     *
+     * If you directly call setArguments() keep in mind that you must follow
+     * certain conventions when you want to overwrite the arguments of the
+     * parent definition, otherwise your arguments will only be appended.
+     *
+     * @param int|string $index
+     * @param mixed      $value
+     *
+     * @return self the current instance
+     *
+     * @throws InvalidArgumentException when $index isn't an integer
+     */
+    public function replaceArgument($index, $value)
+    {
+        if (\is_int($index)) {
+            $this->arguments['index_'.$index] = $value;
+        } elseif (0 === strpos($index, '$')) {
+            $this->arguments[$index] = $value;
+        } else {
+            throw new InvalidArgumentException('The argument must be an existing index or the name of a constructor\'s parameter.');
+        }
+
+        return $this;
+    }
+
+    /**
+     * @internal
+     */
+    public function setAutoconfigured($autoconfigured)
+    {
+        throw new BadMethodCallException('A ChildDefinition cannot be autoconfigured.');
+    }
+
+    /**
+     * @internal
+     */
+    public function setInstanceofConditionals(array $instanceof)
+    {
+        throw new BadMethodCallException('A ChildDefinition cannot have instanceof conditionals set on it.');
+    }
+}
+
+class_alias(ChildDefinition::class, DefinitionDecorator::class);

vendor/symfony/dependency-injection/Compiler/AbstractRecursivePass.php

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+<?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\Argument\ArgumentInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+abstract class AbstractRecursivePass implements CompilerPassInterface
+{
+    /**
+     * @var ContainerBuilder
+     */
+    protected $container;
+    protected $currentId;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        $this->container = $container;
+
+        try {
+            $this->processValue($container->getDefinitions(), true);
+        } finally {
+            $this->container = null;
+        }
+    }
+
+    /**
+     * Processes a value found in a definition tree.
+     *
+     * @param mixed $value
+     * @param bool  $isRoot
+     *
+     * @return mixed The processed value
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if (\is_array($value)) {
+            foreach ($value as $k => $v) {
+                if ($isRoot) {
+                    $this->currentId = $k;
+                }
+                if ($v !== $processedValue = $this->processValue($v, $isRoot)) {
+                    $value[$k] = $processedValue;
+                }
+            }
+        } elseif ($value instanceof ArgumentInterface) {
+            $value->setValues($this->processValue($value->getValues()));
+        } elseif ($value instanceof Definition) {
+            $value->setArguments($this->processValue($value->getArguments()));
+            $value->setProperties($this->processValue($value->getProperties()));
+            $value->setMethodCalls($this->processValue($value->getMethodCalls()));
+
+            $changes = $value->getChanges();
+            if (isset($changes['factory'])) {
+                $value->setFactory($this->processValue($value->getFactory()));
+            }
+            if (isset($changes['configurator'])) {
+                $value->setConfigurator($this->processValue($value->getConfigurator()));
+            }
+        }
+
+        return $value;
+    }
+
+    /**
+     * @param Definition $definition
+     * @param bool       $required
+     *
+     * @return \ReflectionFunctionAbstract|null
+     *
+     * @throws RuntimeException
+     */
+    protected function getConstructor(Definition $definition, $required)
+    {
+        if (\is_string($factory = $definition->getFactory())) {
+            if (!\function_exists($factory)) {
+                throw new RuntimeException(sprintf('Invalid service "%s": function "%s" does not exist.', $this->currentId, $factory));
+            }
+            $r = new \ReflectionFunction($factory);
+            if (false !== $r->getFileName() && file_exists($r->getFileName())) {
+                $this->container->fileExists($r->getFileName());
+            }
+
+            return $r;
+        }
+
+        if ($factory) {
+            list($class, $method) = $factory;
+            if ($class instanceof Reference) {
+                $class = $this->container->findDefinition((string) $class)->getClass();
+            } elseif (null === $class) {
+                $class = $definition->getClass();
+            }
+            if ('__construct' === $method) {
+                throw new RuntimeException(sprintf('Invalid service "%s": "__construct()" cannot be used as a factory method.', $this->currentId));
+            }
+
+            return $this->getReflectionMethod(new Definition($class), $method);
+        }
+
+        $class = $definition->getClass();
+
+        try {
+            if (!$r = $this->container->getReflectionClass($class)) {
+                throw new RuntimeException(sprintf('Invalid service "%s": class "%s" does not exist.', $this->currentId, $class));
+            }
+        } catch (\ReflectionException $e) {
+            throw new RuntimeException(sprintf('Invalid service "%s": %s.', $this->currentId, lcfirst(rtrim($e->getMessage(), '.'))));
+        }
+        if (!$r = $r->getConstructor()) {
+            if ($required) {
+                throw new RuntimeException(sprintf('Invalid service "%s": class%s has no constructor.', $this->currentId, sprintf($class !== $this->currentId ? ' "%s"' : '', $class)));
+            }
+        } elseif (!$r->isPublic()) {
+            throw new RuntimeException(sprintf('Invalid service "%s": %s must be public.', $this->currentId, sprintf($class !== $this->currentId ? 'constructor of class "%s"' : 'its constructor', $class)));
+        }
+
+        return $r;
+    }
+
+    /**
+     * @param Definition $definition
+     * @param string     $method
+     *
+     * @throws RuntimeException
+     *
+     * @return \ReflectionFunctionAbstract
+     */
+    protected function getReflectionMethod(Definition $definition, $method)
+    {
+        if ('__construct' === $method) {
+            return $this->getConstructor($definition, true);
+        }
+
+        if (!$class = $definition->getClass()) {
+            throw new RuntimeException(sprintf('Invalid service "%s": the class is not set.', $this->currentId));
+        }
+
+        if (!$r = $this->container->getReflectionClass($class)) {
+            throw new RuntimeException(sprintf('Invalid service "%s": class "%s" does not exist.', $this->currentId, $class));
+        }
+
+        if (!$r->hasMethod($method)) {
+            throw new RuntimeException(sprintf('Invalid service "%s": method "%s()" does not exist.', $this->currentId, $class !== $this->currentId ? $class.'::'.$method : $method));
+        }
+
+        $r = $r->getMethod($method);
+        if (!$r->isPublic()) {
+            throw new RuntimeException(sprintf('Invalid service "%s": method "%s()" must be public.', $this->currentId, $class !== $this->currentId ? $class.'::'.$method : $method));
+        }
+
+        return $r;
+    }
+}

vendor/symfony/dependency-injection/Compiler/AnalyzeServiceReferencesPass.php

@@ -0,0 +1,186 @@
+<?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\Argument\ArgumentInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ExpressionLanguage;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\ExpressionLanguage\Expression;
+
+/**
+ * Run this pass before passes that need to know more about the relation of
+ * your services.
+ *
+ * This class will populate the ServiceReferenceGraph with information. You can
+ * retrieve the graph in other passes from the compiler.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class AnalyzeServiceReferencesPass extends AbstractRecursivePass implements RepeatablePassInterface
+{
+    private $graph;
+    private $currentDefinition;
+    private $onlyConstructorArguments;
+    private $hasProxyDumper;
+    private $lazy;
+    private $expressionLanguage;
+
+    /**
+     * @param bool $onlyConstructorArguments Sets this Service Reference pass to ignore method calls
+     */
+    public function __construct($onlyConstructorArguments = false, $hasProxyDumper = true)
+    {
+        $this->onlyConstructorArguments = (bool) $onlyConstructorArguments;
+        $this->hasProxyDumper = (bool) $hasProxyDumper;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setRepeatedPass(RepeatedPass $repeatedPass)
+    {
+        // no-op for BC
+    }
+
+    /**
+     * Processes a ContainerBuilder object to populate the service reference graph.
+     */
+    public function process(ContainerBuilder $container)
+    {
+        $this->container = $container;
+        $this->graph = $container->getCompiler()->getServiceReferenceGraph();
+        $this->graph->clear();
+        $this->lazy = false;
+
+        foreach ($container->getAliases() as $id => $alias) {
+            $targetId = $this->getDefinitionId((string) $alias);
+            $this->graph->connect($id, $alias, $targetId, $this->getDefinition($targetId), null);
+        }
+
+        parent::process($container);
+    }
+
+    protected function processValue($value, $isRoot = false)
+    {
+        $lazy = $this->lazy;
+
+        if ($value instanceof ArgumentInterface) {
+            $this->lazy = true;
+            parent::processValue($value->getValues());
+            $this->lazy = $lazy;
+
+            return $value;
+        }
+        if ($value instanceof Expression) {
+            $this->getExpressionLanguage()->compile((string) $value, array('this' => 'container'));
+
+            return $value;
+        }
+        if ($value instanceof Reference) {
+            $targetId = $this->getDefinitionId((string) $value);
+            $targetDefinition = $this->getDefinition($targetId);
+
+            $this->graph->connect(
+                $this->currentId,
+                $this->currentDefinition,
+                $targetId,
+                $targetDefinition,
+                $value,
+                $this->lazy || ($this->hasProxyDumper && $targetDefinition && $targetDefinition->isLazy()),
+                ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE === $value->getInvalidBehavior()
+            );
+
+            return $value;
+        }
+        if (!$value instanceof Definition) {
+            return parent::processValue($value, $isRoot);
+        }
+        if ($isRoot) {
+            if ($value->isSynthetic() || $value->isAbstract()) {
+                return $value;
+            }
+            $this->currentDefinition = $value;
+        } elseif ($this->currentDefinition === $value) {
+            return $value;
+        }
+        $this->lazy = false;
+
+        $this->processValue($value->getFactory());
+        $this->processValue($value->getArguments());
+
+        if (!$this->onlyConstructorArguments) {
+            $this->processValue($value->getProperties());
+            $this->processValue($value->getMethodCalls());
+            $this->processValue($value->getConfigurator());
+        }
+        $this->lazy = $lazy;
+
+        return $value;
+    }
+
+    /**
+     * Returns a service definition given the full name or an alias.
+     *
+     * @param string $id A full id or alias for a service definition
+     *
+     * @return Definition|null The definition related to the supplied id
+     */
+    private function getDefinition($id)
+    {
+        return null === $id ? null : $this->container->getDefinition($id);
+    }
+
+    private function getDefinitionId($id)
+    {
+        while ($this->container->hasAlias($id)) {
+            $id = (string) $this->container->getAlias($id);
+        }
+
+        if (!$this->container->hasDefinition($id)) {
+            return;
+        }
+
+        return $this->container->normalizeId($id);
+    }
+
+    private function getExpressionLanguage()
+    {
+        if (null === $this->expressionLanguage) {
+            if (!class_exists(ExpressionLanguage::class)) {
+                throw new RuntimeException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
+            }
+
+            $providers = $this->container->getExpressionLanguageProviders();
+            $this->expressionLanguage = new ExpressionLanguage(null, $providers, function ($arg) {
+                if ('""' === substr_replace($arg, '', 1, -1)) {
+                    $id = stripcslashes(substr($arg, 1, -1));
+                    $id = $this->getDefinitionId($id);
+
+                    $this->graph->connect(
+                        $this->currentId,
+                        $this->currentDefinition,
+                        $id,
+                        $this->getDefinition($id)
+                    );
+                }
+
+                return sprintf('$this->get(%s)', $arg);
+            });
+        }
+
+        return $this->expressionLanguage;
+    }
+}

vendor/symfony/dependency-injection/Compiler/AutoAliasServicePass.php

@@ -0,0 +1,41 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+
+/**
+ * Sets a service to be an alias of another one, given a format pattern.
+ */
+class AutoAliasServicePass implements CompilerPassInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->findTaggedServiceIds('auto_alias') as $serviceId => $tags) {
+            foreach ($tags as $tag) {
+                if (!isset($tag['format'])) {
+                    throw new InvalidArgumentException(sprintf('Missing tag information "format" on auto_alias service "%s".', $serviceId));
+                }
+
+                $aliasId = $container->getParameterBag()->resolveValue($tag['format']);
+                if ($container->hasDefinition($aliasId) || $container->hasAlias($aliasId)) {
+                    $container->setAlias($serviceId, new Alias($aliasId, true));
+                }
+            }
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/AutowireExceptionPass.php

@@ -0,0 +1,74 @@
+<?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;
+
+@trigger_error('The '.__NAMESPACE__.'\AutowireExceptionPass class is deprecated since Symfony 3.4 and will be removed in 4.0. Use the DefinitionErrorExceptionPass class instead.', E_USER_DEPRECATED);
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+/**
+ * Throws autowire exceptions from AutowirePass for definitions that still exist.
+ *
+ * @deprecated since version 3.4, will be removed in 4.0.
+ *
+ * @author Ryan Weaver <ryan@knpuniversity.com>
+ */
+class AutowireExceptionPass implements CompilerPassInterface
+{
+    private $autowirePass;
+    private $inlineServicePass;
+
+    public function __construct(AutowirePass $autowirePass, InlineServiceDefinitionsPass $inlineServicePass)
+    {
+        $this->autowirePass = $autowirePass;
+        $this->inlineServicePass = $inlineServicePass;
+    }
+
+    public function process(ContainerBuilder $container)
+    {
+        // the pass should only be run once
+        if (null === $this->autowirePass || null === $this->inlineServicePass) {
+            return;
+        }
+
+        $inlinedIds = $this->inlineServicePass->getInlinedServiceIds();
+        $exceptions = $this->autowirePass->getAutowiringExceptions();
+
+        // free up references
+        $this->autowirePass = null;
+        $this->inlineServicePass = null;
+
+        foreach ($exceptions as $exception) {
+            if ($this->doesServiceExistInTheContainer($exception->getServiceId(), $container, $inlinedIds)) {
+                throw $exception;
+            }
+        }
+    }
+
+    private function doesServiceExistInTheContainer($serviceId, ContainerBuilder $container, array $inlinedIds)
+    {
+        if ($container->hasDefinition($serviceId)) {
+            return true;
+        }
+
+        // was the service inlined? Of so, does its parent service exist?
+        if (isset($inlinedIds[$serviceId])) {
+            foreach ($inlinedIds[$serviceId] as $parentId) {
+                if ($this->doesServiceExistInTheContainer($parentId, $container, $inlinedIds)) {
+                    return true;
+                }
+            }
+        }
+
+        return false;
+    }
+}

vendor/symfony/dependency-injection/Compiler/AutowirePass.php

@@ -0,0 +1,559 @@
+<?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\Config\Resource\ClassExistenceResource;
+use Symfony\Component\DependencyInjection\Config\AutowireServiceResource;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\AutowiringFailedException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\LazyProxy\ProxyHelper;
+use Symfony\Component\DependencyInjection\TypedReference;
+
+/**
+ * Inspects existing service definitions and wires the autowired ones using the type hints of their classes.
+ *
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class AutowirePass extends AbstractRecursivePass
+{
+    private $definedTypes = array();
+    private $types;
+    private $ambiguousServiceTypes;
+    private $autowired = array();
+    private $lastFailure;
+    private $throwOnAutowiringException;
+    private $autowiringExceptions = array();
+    private $strictMode;
+
+    /**
+     * @param bool $throwOnAutowireException Errors can be retrieved via Definition::getErrors()
+     */
+    public function __construct($throwOnAutowireException = true)
+    {
+        $this->throwOnAutowiringException = $throwOnAutowireException;
+    }
+
+    /**
+     * @deprecated since version 3.4, to be removed in 4.0.
+     *
+     * @return AutowiringFailedException[]
+     */
+    public function getAutowiringExceptions()
+    {
+        @trigger_error('Calling AutowirePass::getAutowiringExceptions() is deprecated since Symfony 3.4 and will be removed in 4.0. Use Definition::getErrors() instead.', E_USER_DEPRECATED);
+
+        return $this->autowiringExceptions;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        // clear out any possibly stored exceptions from before
+        $this->autowiringExceptions = array();
+        $this->strictMode = $container->hasParameter('container.autowiring.strict_mode') && $container->getParameter('container.autowiring.strict_mode');
+
+        try {
+            parent::process($container);
+        } finally {
+            $this->definedTypes = array();
+            $this->types = null;
+            $this->ambiguousServiceTypes = null;
+            $this->autowired = array();
+        }
+    }
+
+    /**
+     * Creates a resource to help know if this service has changed.
+     *
+     * @param \ReflectionClass $reflectionClass
+     *
+     * @return AutowireServiceResource
+     *
+     * @deprecated since version 3.3, to be removed in 4.0. Use ContainerBuilder::getReflectionClass() instead.
+     */
+    public static function createResourceForClass(\ReflectionClass $reflectionClass)
+    {
+        @trigger_error('The '.__METHOD__.'() method is deprecated since Symfony 3.3 and will be removed in 4.0. Use ContainerBuilder::getReflectionClass() instead.', E_USER_DEPRECATED);
+
+        $metadata = array();
+
+        foreach ($reflectionClass->getMethods(\ReflectionMethod::IS_PUBLIC) as $reflectionMethod) {
+            if (!$reflectionMethod->isStatic()) {
+                $metadata[$reflectionMethod->name] = self::getResourceMetadataForMethod($reflectionMethod);
+            }
+        }
+
+        return new AutowireServiceResource($reflectionClass->name, $reflectionClass->getFileName(), $metadata);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        try {
+            return $this->doProcessValue($value, $isRoot);
+        } catch (AutowiringFailedException $e) {
+            if ($this->throwOnAutowiringException) {
+                throw $e;
+            }
+
+            $this->autowiringExceptions[] = $e;
+            $this->container->getDefinition($this->currentId)->addError($e->getMessage());
+
+            return parent::processValue($value, $isRoot);
+        }
+    }
+
+    private function doProcessValue($value, $isRoot = false)
+    {
+        if ($value instanceof TypedReference) {
+            if ($ref = $this->getAutowiredReference($value, $value->getRequiringClass() ? sprintf('for "%s" in "%s"', $value->getType(), $value->getRequiringClass()) : '')) {
+                return $ref;
+            }
+            $this->container->log($this, $this->createTypeNotFoundMessage($value, 'it'));
+        }
+        $value = parent::processValue($value, $isRoot);
+
+        if (!$value instanceof Definition || !$value->isAutowired() || $value->isAbstract() || !$value->getClass()) {
+            return $value;
+        }
+        if (!$reflectionClass = $this->container->getReflectionClass($value->getClass(), false)) {
+            $this->container->log($this, sprintf('Skipping service "%s": Class or interface "%s" cannot be loaded.', $this->currentId, $value->getClass()));
+
+            return $value;
+        }
+
+        $methodCalls = $value->getMethodCalls();
+
+        try {
+            $constructor = $this->getConstructor($value, false);
+        } catch (RuntimeException $e) {
+            throw new AutowiringFailedException($this->currentId, $e->getMessage(), 0, $e);
+        }
+
+        if ($constructor) {
+            array_unshift($methodCalls, array($constructor, $value->getArguments()));
+        }
+
+        $methodCalls = $this->autowireCalls($reflectionClass, $methodCalls);
+
+        if ($constructor) {
+            list(, $arguments) = array_shift($methodCalls);
+
+            if ($arguments !== $value->getArguments()) {
+                $value->setArguments($arguments);
+            }
+        }
+
+        if ($methodCalls !== $value->getMethodCalls()) {
+            $value->setMethodCalls($methodCalls);
+        }
+
+        return $value;
+    }
+
+    /**
+     * @param \ReflectionClass $reflectionClass
+     * @param array            $methodCalls
+     *
+     * @return array
+     */
+    private function autowireCalls(\ReflectionClass $reflectionClass, array $methodCalls)
+    {
+        foreach ($methodCalls as $i => $call) {
+            list($method, $arguments) = $call;
+
+            if ($method instanceof \ReflectionFunctionAbstract) {
+                $reflectionMethod = $method;
+            } else {
+                $reflectionMethod = $this->getReflectionMethod(new Definition($reflectionClass->name), $method);
+            }
+
+            $arguments = $this->autowireMethod($reflectionMethod, $arguments);
+
+            if ($arguments !== $call[1]) {
+                $methodCalls[$i][1] = $arguments;
+            }
+        }
+
+        return $methodCalls;
+    }
+
+    /**
+     * Autowires the constructor or a method.
+     *
+     * @param \ReflectionFunctionAbstract $reflectionMethod
+     * @param array                       $arguments
+     *
+     * @return array The autowired arguments
+     *
+     * @throws AutowiringFailedException
+     */
+    private function autowireMethod(\ReflectionFunctionAbstract $reflectionMethod, array $arguments)
+    {
+        $class = $reflectionMethod instanceof \ReflectionMethod ? $reflectionMethod->class : $this->currentId;
+        $method = $reflectionMethod->name;
+        $parameters = $reflectionMethod->getParameters();
+        if (method_exists('ReflectionMethod', 'isVariadic') && $reflectionMethod->isVariadic()) {
+            array_pop($parameters);
+        }
+
+        foreach ($parameters as $index => $parameter) {
+            if (array_key_exists($index, $arguments) && '' !== $arguments[$index]) {
+                continue;
+            }
+
+            $type = ProxyHelper::getTypeHint($reflectionMethod, $parameter, true);
+
+            if (!$type) {
+                if (isset($arguments[$index])) {
+                    continue;
+                }
+
+                // no default value? Then fail
+                if (!$parameter->isDefaultValueAvailable()) {
+                    // For core classes, isDefaultValueAvailable() can
+                    // be false when isOptional() returns true. If the
+                    // argument *is* optional, allow it to be missing
+                    if ($parameter->isOptional()) {
+                        continue;
+                    }
+                    $type = ProxyHelper::getTypeHint($reflectionMethod, $parameter, false);
+                    $type = $type ? sprintf('is type-hinted "%s"', $type) : 'has no type-hint';
+
+                    throw new AutowiringFailedException($this->currentId, sprintf('Cannot autowire service "%s": argument "$%s" of method "%s()" %s, you should configure its value explicitly.', $this->currentId, $parameter->name, $class !== $this->currentId ? $class.'::'.$method : $method, $type));
+                }
+
+                // specifically pass the default value
+                $arguments[$index] = $parameter->getDefaultValue();
+
+                continue;
+            }
+
+            if (!$value = $this->getAutowiredReference($ref = new TypedReference($type, $type, !$parameter->isOptional() ? $class : ''), 'for '.sprintf('argument "$%s" of method "%s()"', $parameter->name, $class.'::'.$method))) {
+                $failureMessage = $this->createTypeNotFoundMessage($ref, sprintf('argument "$%s" of method "%s()"', $parameter->name, $class !== $this->currentId ? $class.'::'.$method : $method));
+
+                if ($parameter->isDefaultValueAvailable()) {
+                    $value = $parameter->getDefaultValue();
+                } elseif (!$parameter->allowsNull()) {
+                    throw new AutowiringFailedException($this->currentId, $failureMessage);
+                }
+                $this->container->log($this, $failureMessage);
+            }
+
+            $arguments[$index] = $value;
+        }
+
+        if ($parameters && !isset($arguments[++$index])) {
+            while (0 <= --$index) {
+                $parameter = $parameters[$index];
+                if (!$parameter->isDefaultValueAvailable() || $parameter->getDefaultValue() !== $arguments[$index]) {
+                    break;
+                }
+                unset($arguments[$index]);
+            }
+        }
+
+        // it's possible index 1 was set, then index 0, then 2, etc
+        // make sure that we re-order so they're injected as expected
+        ksort($arguments);
+
+        return $arguments;
+    }
+
+    /**
+     * @return TypedReference|null A reference to the service matching the given type, if any
+     */
+    private function getAutowiredReference(TypedReference $reference, $deprecationMessage)
+    {
+        $this->lastFailure = null;
+        $type = $reference->getType();
+
+        if ($type !== $this->container->normalizeId($reference) || ($this->container->has($type) && !$this->container->findDefinition($type)->isAbstract())) {
+            return $reference;
+        }
+
+        if (null === $this->types) {
+            $this->populateAvailableTypes($this->strictMode);
+        }
+
+        if (isset($this->definedTypes[$type])) {
+            return new TypedReference($this->types[$type], $type);
+        }
+
+        if (!$this->strictMode && isset($this->types[$type])) {
+            $message = 'Autowiring services based on the types they implement is deprecated since Symfony 3.3 and won\'t be supported in version 4.0.';
+            if ($aliasSuggestion = $this->getAliasesSuggestionForType($type = $reference->getType(), $deprecationMessage)) {
+                $message .= ' '.$aliasSuggestion;
+            } else {
+                $message .= sprintf(' You should %s the "%s" service to "%s" instead.', isset($this->types[$this->types[$type]]) ? 'alias' : 'rename (or alias)', $this->types[$type], $type);
+            }
+
+            @trigger_error($message, E_USER_DEPRECATED);
+
+            return new TypedReference($this->types[$type], $type);
+        }
+
+        if (!$reference->canBeAutoregistered() || isset($this->types[$type]) || isset($this->ambiguousServiceTypes[$type])) {
+            return;
+        }
+
+        if (isset($this->autowired[$type])) {
+            return $this->autowired[$type] ? new TypedReference($this->autowired[$type], $type) : null;
+        }
+
+        if (!$this->strictMode) {
+            return $this->createAutowiredDefinition($type);
+        }
+    }
+
+    /**
+     * Populates the list of available types.
+     */
+    private function populateAvailableTypes($onlyAutowiringTypes = false)
+    {
+        $this->types = array();
+        if (!$onlyAutowiringTypes) {
+            $this->ambiguousServiceTypes = array();
+        }
+
+        foreach ($this->container->getDefinitions() as $id => $definition) {
+            $this->populateAvailableType($id, $definition, $onlyAutowiringTypes);
+        }
+    }
+
+    /**
+     * Populates the list of available types for a given definition.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     */
+    private function populateAvailableType($id, Definition $definition, $onlyAutowiringTypes)
+    {
+        // Never use abstract services
+        if ($definition->isAbstract()) {
+            return;
+        }
+
+        foreach ($definition->getAutowiringTypes(false) as $type) {
+            $this->definedTypes[$type] = true;
+            $this->types[$type] = $id;
+            unset($this->ambiguousServiceTypes[$type]);
+        }
+
+        if ($onlyAutowiringTypes) {
+            return;
+        }
+
+        if (preg_match('/^\d+_[^~]++~[._a-zA-Z\d]{7}$/', $id) || $definition->isDeprecated() || !$reflectionClass = $this->container->getReflectionClass($definition->getClass(), false)) {
+            return;
+        }
+
+        foreach ($reflectionClass->getInterfaces() as $reflectionInterface) {
+            $this->set($reflectionInterface->name, $id);
+        }
+
+        do {
+            $this->set($reflectionClass->name, $id);
+        } while ($reflectionClass = $reflectionClass->getParentClass());
+    }
+
+    /**
+     * Associates a type and a service id if applicable.
+     *
+     * @param string $type
+     * @param string $id
+     */
+    private function set($type, $id)
+    {
+        if (isset($this->definedTypes[$type])) {
+            return;
+        }
+
+        // is this already a type/class that is known to match multiple services?
+        if (isset($this->ambiguousServiceTypes[$type])) {
+            $this->ambiguousServiceTypes[$type][] = $id;
+
+            return;
+        }
+
+        // check to make sure the type doesn't match multiple services
+        if (!isset($this->types[$type]) || $this->types[$type] === $id) {
+            $this->types[$type] = $id;
+
+            return;
+        }
+
+        // keep an array of all services matching this type
+        if (!isset($this->ambiguousServiceTypes[$type])) {
+            $this->ambiguousServiceTypes[$type] = array($this->types[$type]);
+            unset($this->types[$type]);
+        }
+        $this->ambiguousServiceTypes[$type][] = $id;
+    }
+
+    /**
+     * Registers a definition for the type if possible or throws an exception.
+     *
+     * @param string $type
+     *
+     * @return TypedReference|null A reference to the registered definition
+     */
+    private function createAutowiredDefinition($type)
+    {
+        if (!($typeHint = $this->container->getReflectionClass($type, false)) || !$typeHint->isInstantiable()) {
+            return;
+        }
+
+        $currentId = $this->currentId;
+        $this->currentId = $type;
+        $this->autowired[$type] = $argumentId = sprintf('autowired.%s', $type);
+        $argumentDefinition = new Definition($type);
+        $argumentDefinition->setPublic(false);
+        $argumentDefinition->setAutowired(true);
+
+        try {
+            $originalThrowSetting = $this->throwOnAutowiringException;
+            $this->throwOnAutowiringException = true;
+            $this->processValue($argumentDefinition, true);
+            $this->container->setDefinition($argumentId, $argumentDefinition);
+        } catch (AutowiringFailedException $e) {
+            $this->autowired[$type] = false;
+            $this->lastFailure = $e->getMessage();
+            $this->container->log($this, $this->lastFailure);
+
+            return;
+        } finally {
+            $this->throwOnAutowiringException = $originalThrowSetting;
+            $this->currentId = $currentId;
+        }
+
+        @trigger_error(sprintf('Relying on service auto-registration for type "%s" is deprecated since Symfony 3.4 and won\'t be supported in 4.0. Create a service named "%s" instead.', $type, $type), E_USER_DEPRECATED);
+
+        $this->container->log($this, sprintf('Type "%s" has been auto-registered for service "%s".', $type, $this->currentId));
+
+        return new TypedReference($argumentId, $type);
+    }
+
+    private function createTypeNotFoundMessage(TypedReference $reference, $label)
+    {
+        if (!$r = $this->container->getReflectionClass($type = $reference->getType(), false)) {
+            // either $type does not exist or a parent class does not exist
+            try {
+                $resource = new ClassExistenceResource($type, false);
+                // isFresh() will explode ONLY if a parent class/trait does not exist
+                $resource->isFresh(0);
+                $parentMsg = false;
+            } catch (\ReflectionException $e) {
+                $parentMsg = $e->getMessage();
+            }
+
+            $message = sprintf('has type "%s" but this class %s.', $type, $parentMsg ? sprintf('is missing a parent class (%s)', $parentMsg) : 'was not found');
+        } else {
+            $alternatives = $this->createTypeAlternatives($reference);
+            $message = $this->container->has($type) ? 'this service is abstract' : 'no such service exists';
+            $message = sprintf('references %s "%s" but %s.%s', $r->isInterface() ? 'interface' : 'class', $type, $message, $alternatives);
+
+            if ($r->isInterface() && !$alternatives) {
+                $message .= ' Did you create a class that implements this interface?';
+            }
+        }
+
+        $message = sprintf('Cannot autowire service "%s": %s %s', $this->currentId, $label, $message);
+
+        if (null !== $this->lastFailure) {
+            $message = $this->lastFailure."\n".$message;
+            $this->lastFailure = null;
+        }
+
+        return $message;
+    }
+
+    private function createTypeAlternatives(TypedReference $reference)
+    {
+        // try suggesting available aliases first
+        if ($message = $this->getAliasesSuggestionForType($type = $reference->getType())) {
+            return ' '.$message;
+        }
+        if (null === $this->ambiguousServiceTypes) {
+            $this->populateAvailableTypes();
+        }
+
+        if (isset($this->ambiguousServiceTypes[$type])) {
+            $message = sprintf('one of these existing services: "%s"', implode('", "', $this->ambiguousServiceTypes[$type]));
+        } elseif (isset($this->types[$type])) {
+            $message = sprintf('the existing "%s" service', $this->types[$type]);
+        } elseif ($reference->getRequiringClass() && !$reference->canBeAutoregistered() && !$this->strictMode) {
+            return ' It cannot be auto-registered because it is from a different root namespace.';
+        } else {
+            return;
+        }
+
+        return sprintf(' You should maybe alias this %s to %s.', class_exists($type, false) ? 'class' : 'interface', $message);
+    }
+
+    /**
+     * @deprecated since version 3.3, to be removed in 4.0.
+     */
+    private static function getResourceMetadataForMethod(\ReflectionMethod $method)
+    {
+        $methodArgumentsMetadata = array();
+        foreach ($method->getParameters() as $parameter) {
+            try {
+                $class = $parameter->getClass();
+            } catch (\ReflectionException $e) {
+                // type-hint is against a non-existent class
+                $class = false;
+            }
+
+            $isVariadic = method_exists($parameter, 'isVariadic') && $parameter->isVariadic();
+            $methodArgumentsMetadata[] = array(
+                'class' => $class,
+                'isOptional' => $parameter->isOptional(),
+                'defaultValue' => ($parameter->isOptional() && !$isVariadic) ? $parameter->getDefaultValue() : null,
+            );
+        }
+
+        return $methodArgumentsMetadata;
+    }
+
+    private function getAliasesSuggestionForType($type, $extraContext = null)
+    {
+        $aliases = array();
+        foreach (class_parents($type) + class_implements($type) as $parent) {
+            if ($this->container->has($parent) && !$this->container->findDefinition($parent)->isAbstract()) {
+                $aliases[] = $parent;
+            }
+        }
+
+        $extraContext = $extraContext ? ' '.$extraContext : '';
+        if (1 < $len = \count($aliases)) {
+            $message = sprintf('Try changing the type-hint%s to one of its parents: ', $extraContext);
+            for ($i = 0, --$len; $i < $len; ++$i) {
+                $message .= sprintf('%s "%s", ', class_exists($aliases[$i], false) ? 'class' : 'interface', $aliases[$i]);
+            }
+            $message .= sprintf('or %s "%s".', class_exists($aliases[$i], false) ? 'class' : 'interface', $aliases[$i]);
+
+            return $message;
+        }
+
+        if ($aliases) {
+            return sprintf('Try changing the type-hint%s to "%s" instead.', $extraContext, $aliases[0]);
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/AutowireRequiredMethodsPass.php

@@ -0,0 +1,70 @@
+<?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\Definition;
+
+/**
+ * Looks for definitions with autowiring enabled and registers their corresponding "@required" methods as setters.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class AutowireRequiredMethodsPass extends AbstractRecursivePass
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        $value = parent::processValue($value, $isRoot);
+
+        if (!$value instanceof Definition || !$value->isAutowired() || $value->isAbstract() || !$value->getClass()) {
+            return $value;
+        }
+        if (!$reflectionClass = $this->container->getReflectionClass($value->getClass(), false)) {
+            return $value;
+        }
+
+        $alreadyCalledMethods = array();
+
+        foreach ($value->getMethodCalls() as list($method)) {
+            $alreadyCalledMethods[strtolower($method)] = true;
+        }
+
+        foreach ($reflectionClass->getMethods() as $reflectionMethod) {
+            $r = $reflectionMethod;
+
+            if ($r->isConstructor() || isset($alreadyCalledMethods[strtolower($r->name)])) {
+                continue;
+            }
+
+            while (true) {
+                if (false !== $doc = $r->getDocComment()) {
+                    if (false !== stripos($doc, '@required') && preg_match('#(?:^/\*\*|\n\s*+\*)\s*+@required(?:\s|\*/$)#i', $doc)) {
+                        $value->addMethodCall($reflectionMethod->name);
+                        break;
+                    }
+                    if (false === stripos($doc, '@inheritdoc') || !preg_match('#(?:^/\*\*|\n\s*+\*)\s*+(?:\{@inheritdoc\}|@inheritdoc)(?:\s|\*/$)#i', $doc)) {
+                        break;
+                    }
+                }
+                try {
+                    $r = $r->getPrototype();
+                } catch (\ReflectionException $e) {
+                    break; // method has no prototype
+                }
+            }
+        }
+
+        return $value;
+    }
+}

vendor/symfony/dependency-injection/Compiler/CheckArgumentsValidityPass.php

@@ -0,0 +1,85 @@
+<?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\Definition;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * Checks if arguments of methods are properly configured.
+ *
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class CheckArgumentsValidityPass extends AbstractRecursivePass
+{
+    private $throwExceptions;
+
+    public function __construct($throwExceptions = true)
+    {
+        $this->throwExceptions = $throwExceptions;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if (!$value instanceof Definition) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        $i = 0;
+        foreach ($value->getArguments() as $k => $v) {
+            if ($k !== $i++) {
+                if (!\is_int($k)) {
+                    $msg = sprintf('Invalid constructor argument for service "%s": integer expected but found string "%s". Check your service definition.', $this->currentId, $k);
+                    $value->addError($msg);
+                    if ($this->throwExceptions) {
+                        throw new RuntimeException($msg);
+                    }
+
+                    break;
+                }
+
+                $msg = sprintf('Invalid constructor argument %d for service "%s": argument %d must be defined before. Check your service definition.', 1 + $k, $this->currentId, $i);
+                $value->addError($msg);
+                if ($this->throwExceptions) {
+                    throw new RuntimeException($msg);
+                }
+            }
+        }
+
+        foreach ($value->getMethodCalls() as $methodCall) {
+            $i = 0;
+            foreach ($methodCall[1] as $k => $v) {
+                if ($k !== $i++) {
+                    if (!\is_int($k)) {
+                        $msg = sprintf('Invalid argument for method call "%s" of service "%s": integer expected but found string "%s". Check your service definition.', $methodCall[0], $this->currentId, $k);
+                        $value->addError($msg);
+                        if ($this->throwExceptions) {
+                            throw new RuntimeException($msg);
+                        }
+
+                        break;
+                    }
+
+                    $msg = sprintf('Invalid argument %d for method call "%s" of service "%s": argument %d must be defined before. Check your service definition.', 1 + $k, $methodCall[0], $this->currentId, $i);
+                    $value->addError($msg);
+                    if ($this->throwExceptions) {
+                        throw new RuntimeException($msg);
+                    }
+                }
+            }
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/CheckCircularReferencesPass.php

@@ -0,0 +1,78 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
+
+/**
+ * Checks your services for circular references.
+ *
+ * References from method calls are ignored since we might be able to resolve
+ * these references depending on the order in which services are called.
+ *
+ * Circular reference from method calls will only be detected at run-time.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class CheckCircularReferencesPass implements CompilerPassInterface
+{
+    private $currentPath;
+    private $checkedNodes;
+
+    /**
+     * Checks the ContainerBuilder object for circular references.
+     */
+    public function process(ContainerBuilder $container)
+    {
+        $graph = $container->getCompiler()->getServiceReferenceGraph();
+
+        $this->checkedNodes = array();
+        foreach ($graph->getNodes() as $id => $node) {
+            $this->currentPath = array($id);
+
+            $this->checkOutEdges($node->getOutEdges());
+        }
+    }
+
+    /**
+     * Checks for circular references.
+     *
+     * @param ServiceReferenceGraphEdge[] $edges An array of Edges
+     *
+     * @throws ServiceCircularReferenceException when a circular reference is found
+     */
+    private function checkOutEdges(array $edges)
+    {
+        foreach ($edges as $edge) {
+            $node = $edge->getDestNode();
+            $id = $node->getId();
+
+            if (empty($this->checkedNodes[$id])) {
+                // Don't check circular references for lazy edges
+                if (!$node->getValue() || (!$edge->isLazy() && !$edge->isWeak())) {
+                    $searchKey = array_search($id, $this->currentPath);
+                    $this->currentPath[] = $id;
+
+                    if (false !== $searchKey) {
+                        throw new ServiceCircularReferenceException($id, \array_slice($this->currentPath, $searchKey));
+                    }
+
+                    $this->checkOutEdges($node->getOutEdges());
+                }
+
+                $this->checkedNodes[$id] = true;
+                array_pop($this->currentPath);
+            }
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/CheckDefinitionValidityPass.php

@@ -0,0 +1,100 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\EnvParameterException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * This pass validates each definition individually only taking the information
+ * into account which is contained in the definition itself.
+ *
+ * Later passes can rely on the following, and specifically do not need to
+ * perform these checks themselves:
+ *
+ * - non synthetic, non abstract services always have a class set
+ * - synthetic services are always public
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class CheckDefinitionValidityPass implements CompilerPassInterface
+{
+    /**
+     * Processes the ContainerBuilder to validate the Definition.
+     *
+     * @throws RuntimeException When the Definition is invalid
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->getDefinitions() as $id => $definition) {
+            // synthetic service is public
+            if ($definition->isSynthetic() && !($definition->isPublic() || $definition->isPrivate())) {
+                throw new RuntimeException(sprintf('A synthetic service ("%s") must be public.', $id));
+            }
+
+            // non-synthetic, non-abstract service has class
+            if (!$definition->isAbstract() && !$definition->isSynthetic() && !$definition->getClass()) {
+                if ($definition->getFactory()) {
+                    throw new RuntimeException(sprintf('Please add the class to service "%s" even if it is constructed by a factory since we might need to add method calls based on compile-time checks.', $id));
+                }
+                if (class_exists($id) || interface_exists($id, false)) {
+                    if (0 === strpos($id, '\\') && 1 < substr_count($id, '\\')) {
+                        throw new RuntimeException(sprintf(
+                            'The definition for "%s" has no class attribute, and appears to reference a class or interface. '
+                            .'Please specify the class attribute explicitly or remove the leading backslash by renaming '
+                            .'the service to "%s" to get rid of this error.',
+                            $id, substr($id, 1)
+                        ));
+                    }
+
+                    throw new RuntimeException(sprintf(
+                         'The definition for "%s" has no class attribute, and appears to reference a '
+                        .'class or interface in the global namespace. Leaving out the "class" attribute '
+                        .'is only allowed for namespaced classes. Please specify the class attribute '
+                        .'explicitly to get rid of this error.',
+                        $id
+                    ));
+                }
+
+                throw new RuntimeException(sprintf('The definition for "%s" has no class. If you intend to inject this service dynamically at runtime, please mark it as synthetic=true. If this is an abstract definition solely used by child definitions, please add abstract=true, otherwise specify a class to get rid of this error.', $id));
+            }
+
+            // tag attribute values must be scalars
+            foreach ($definition->getTags() as $name => $tags) {
+                foreach ($tags as $attributes) {
+                    foreach ($attributes as $attribute => $value) {
+                        if (!is_scalar($value) && null !== $value) {
+                            throw new RuntimeException(sprintf('A "tags" attribute must be of a scalar-type for service "%s", tag "%s", attribute "%s".', $id, $name, $attribute));
+                        }
+                    }
+                }
+            }
+
+            if ($definition->isPublic() && !$definition->isPrivate()) {
+                $resolvedId = $container->resolveEnvPlaceholders($id, null, $usedEnvs);
+                if (null !== $usedEnvs) {
+                    throw new EnvParameterException(array($resolvedId), null, 'A service name ("%s") cannot contain dynamic values.');
+                }
+            }
+        }
+
+        foreach ($container->getAliases() as $id => $alias) {
+            if ($alias->isPublic() && !$alias->isPrivate()) {
+                $resolvedId = $container->resolveEnvPlaceholders($id, null, $usedEnvs);
+                if (null !== $usedEnvs) {
+                    throw new EnvParameterException(array($resolvedId), null, 'An alias name ("%s") cannot contain dynamic values.');
+                }
+            }
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php

@@ -0,0 +1,36 @@
+<?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\ContainerInterface;
+use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Checks that all references are pointing to a valid service.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class CheckExceptionOnInvalidReferenceBehaviorPass extends AbstractRecursivePass
+{
+    protected function processValue($value, $isRoot = false)
+    {
+        if (!$value instanceof Reference) {
+            return parent::processValue($value, $isRoot);
+        }
+        if (ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE === $value->getInvalidBehavior() && !$this->container->has($id = (string) $value)) {
+            throw new ServiceNotFoundException($id, $this->currentId);
+        }
+
+        return $value;
+    }
+}

vendor/symfony/dependency-injection/Compiler/CheckReferenceValidityPass.php

@@ -0,0 +1,43 @@
+<?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\Definition;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Checks the validity of references.
+ *
+ * The following checks are performed by this pass:
+ * - target definitions are not abstract
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class CheckReferenceValidityPass extends AbstractRecursivePass
+{
+    protected function processValue($value, $isRoot = false)
+    {
+        if ($isRoot && $value instanceof Definition && ($value->isSynthetic() || $value->isAbstract())) {
+            return $value;
+        }
+        if ($value instanceof Reference && $this->container->hasDefinition((string) $value)) {
+            $targetDefinition = $this->container->getDefinition((string) $value);
+
+            if ($targetDefinition->isAbstract()) {
+                throw new RuntimeException(sprintf('The definition "%s" has a reference to an abstract definition "%s". Abstract definitions cannot be the target of references.', $this->currentId, $value));
+            }
+        }
+
+        return parent::processValue($value, $isRoot);
+    }
+}

vendor/symfony/dependency-injection/Compiler/Compiler.php

@@ -0,0 +1,166 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\EnvParameterException;
+
+/**
+ * This class is used to remove circular dependencies between individual passes.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class Compiler
+{
+    private $passConfig;
+    private $log = array();
+    private $loggingFormatter;
+    private $serviceReferenceGraph;
+
+    public function __construct()
+    {
+        $this->passConfig = new PassConfig();
+        $this->serviceReferenceGraph = new ServiceReferenceGraph();
+    }
+
+    /**
+     * Returns the PassConfig.
+     *
+     * @return PassConfig The PassConfig instance
+     */
+    public function getPassConfig()
+    {
+        return $this->passConfig;
+    }
+
+    /**
+     * Returns the ServiceReferenceGraph.
+     *
+     * @return ServiceReferenceGraph The ServiceReferenceGraph instance
+     */
+    public function getServiceReferenceGraph()
+    {
+        return $this->serviceReferenceGraph;
+    }
+
+    /**
+     * Returns the logging formatter which can be used by compilation passes.
+     *
+     * @return LoggingFormatter
+     *
+     * @deprecated since version 3.3, to be removed in 4.0. Use the ContainerBuilder::log() method instead.
+     */
+    public function getLoggingFormatter()
+    {
+        if (null === $this->loggingFormatter) {
+            @trigger_error(sprintf('The %s() method is deprecated since Symfony 3.3 and will be removed in 4.0. Use the ContainerBuilder::log() method instead.', __METHOD__), E_USER_DEPRECATED);
+
+            $this->loggingFormatter = new LoggingFormatter();
+        }
+
+        return $this->loggingFormatter;
+    }
+
+    /**
+     * Adds a pass to the PassConfig.
+     *
+     * @param CompilerPassInterface $pass     A compiler pass
+     * @param string                $type     The type of the pass
+     * @param int                   $priority Used to sort the passes
+     */
+    public function addPass(CompilerPassInterface $pass, $type = PassConfig::TYPE_BEFORE_OPTIMIZATION/*, int $priority = 0*/)
+    {
+        if (\func_num_args() >= 3) {
+            $priority = func_get_arg(2);
+        } else {
+            if (__CLASS__ !== \get_class($this)) {
+                $r = new \ReflectionMethod($this, __FUNCTION__);
+                if (__CLASS__ !== $r->getDeclaringClass()->getName()) {
+                    @trigger_error(sprintf('Method %s() will have a third `int $priority = 0` argument in version 4.0. Not defining it is deprecated since Symfony 3.2.', __METHOD__), E_USER_DEPRECATED);
+                }
+            }
+
+            $priority = 0;
+        }
+
+        $this->passConfig->addPass($pass, $type, $priority);
+    }
+
+    /**
+     * Adds a log message.
+     *
+     * @param string $string The log message
+     *
+     * @deprecated since version 3.3, to be removed in 4.0. Use the ContainerBuilder::log() method instead.
+     */
+    public function addLogMessage($string)
+    {
+        @trigger_error(sprintf('The %s() method is deprecated since Symfony 3.3 and will be removed in 4.0. Use the ContainerBuilder::log() method instead.', __METHOD__), E_USER_DEPRECATED);
+
+        $this->log[] = $string;
+    }
+
+    /**
+     * @final
+     */
+    public function log(CompilerPassInterface $pass, $message)
+    {
+        if (false !== strpos($message, "\n")) {
+            $message = str_replace("\n", "\n".\get_class($pass).': ', trim($message));
+        }
+
+        $this->log[] = \get_class($pass).': '.$message;
+    }
+
+    /**
+     * Returns the log.
+     *
+     * @return array Log array
+     */
+    public function getLog()
+    {
+        return $this->log;
+    }
+
+    /**
+     * Run the Compiler and process all Passes.
+     */
+    public function compile(ContainerBuilder $container)
+    {
+        try {
+            foreach ($this->passConfig->getPasses() as $pass) {
+                $pass->process($container);
+            }
+        } catch (\Exception $e) {
+            $usedEnvs = array();
+            $prev = $e;
+
+            do {
+                $msg = $prev->getMessage();
+
+                if ($msg !== $resolvedMsg = $container->resolveEnvPlaceholders($msg, null, $usedEnvs)) {
+                    $r = new \ReflectionProperty($prev, 'message');
+                    $r->setAccessible(true);
+                    $r->setValue($prev, $resolvedMsg);
+                }
+            } while ($prev = $prev->getPrevious());
+
+            if ($usedEnvs) {
+                $e = new EnvParameterException($usedEnvs, $e);
+            }
+
+            throw $e;
+        } finally {
+            $this->getServiceReferenceGraph()->clear();
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/CompilerPassInterface.php

@@ -0,0 +1,27 @@
+<?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\ContainerBuilder;
+
+/**
+ * Interface that must be implemented by compilation passes.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+interface CompilerPassInterface
+{
+    /**
+     * You can modify the container here before it is dumped to PHP code.
+     */
+    public function process(ContainerBuilder $container);
+}

vendor/symfony/dependency-injection/Compiler/DecoratorServicePass.php

@@ -0,0 +1,81 @@
+<?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\ContainerBuilder;
+
+/**
+ * Overwrites a service but keeps the overridden one.
+ *
+ * @author Christophe Coevoet <stof@notk.org>
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Diego Saint Esteben <diego@saintesteben.me>
+ */
+class DecoratorServicePass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container)
+    {
+        $definitions = new \SplPriorityQueue();
+        $order = PHP_INT_MAX;
+
+        foreach ($container->getDefinitions() as $id => $definition) {
+            if (!$decorated = $definition->getDecoratedService()) {
+                continue;
+            }
+            $definitions->insert(array($id, $definition), array($decorated[2], --$order));
+        }
+        $decoratingDefinitions = array();
+
+        foreach ($definitions as list($id, $definition)) {
+            list($inner, $renamedId) = $definition->getDecoratedService();
+
+            $definition->setDecoratedService(null);
+
+            if (!$renamedId) {
+                $renamedId = $id.'.inner';
+            }
+
+            // we create a new alias/service for the service we are replacing
+            // to be able to reference it in the new one
+            if ($container->hasAlias($inner)) {
+                $alias = $container->getAlias($inner);
+                $public = $alias->isPublic();
+                $private = $alias->isPrivate();
+                $container->setAlias($renamedId, new Alias($container->normalizeId($alias), false));
+            } else {
+                $decoratedDefinition = $container->getDefinition($inner);
+                $public = $decoratedDefinition->isPublic();
+                $private = $decoratedDefinition->isPrivate();
+                $decoratedDefinition->setPublic(false);
+                $container->setDefinition($renamedId, $decoratedDefinition);
+                $decoratingDefinitions[$inner] = $decoratedDefinition;
+            }
+
+            if (isset($decoratingDefinitions[$inner])) {
+                $decoratingDefinition = $decoratingDefinitions[$inner];
+                $definition->setTags(array_merge($decoratingDefinition->getTags(), $definition->getTags()));
+                $autowiringTypes = $decoratingDefinition->getAutowiringTypes(false);
+                if ($types = array_merge($autowiringTypes, $definition->getAutowiringTypes(false))) {
+                    $definition->setAutowiringTypes($types);
+                }
+                $decoratingDefinition->setTags(array());
+                if ($autowiringTypes) {
+                    $decoratingDefinition->setAutowiringTypes(array());
+                }
+                $decoratingDefinitions[$inner] = $definition;
+            }
+
+            $container->setAlias($inner, $id)->setPublic($public)->setPrivate($private);
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/DefinitionErrorExceptionPass.php

@@ -0,0 +1,39 @@
+<?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\Definition;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * Throws an exception for any Definitions that have errors and still exist.
+ *
+ * @author Ryan Weaver <ryan@knpuniversity.com>
+ */
+class DefinitionErrorExceptionPass extends AbstractRecursivePass
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if (!$value instanceof Definition || empty($value->getErrors())) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        // only show the first error so the user can focus on it
+        $errors = $value->getErrors();
+        $message = reset($errors);
+
+        throw new RuntimeException($message);
+    }
+}

vendor/symfony/dependency-injection/Compiler/ExtensionCompilerPass.php

@@ -0,0 +1,37 @@
+<?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\ContainerBuilder;
+
+/**
+ * A pass to automatically process extensions if they implement
+ * CompilerPassInterface.
+ *
+ * @author Wouter J <wouter@wouterj.nl>
+ */
+class ExtensionCompilerPass implements CompilerPassInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->getExtensions() as $extension) {
+            if (!$extension instanceof CompilerPassInterface) {
+                continue;
+            }
+
+            $extension->process($container);
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/FactoryReturnTypePass.php

@@ -0,0 +1,112 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * @author Guilhem N. <egetick@gmail.com>
+ *
+ * @deprecated since version 3.3, to be removed in 4.0.
+ */
+class FactoryReturnTypePass implements CompilerPassInterface
+{
+    private $resolveClassPass;
+
+    public function __construct(ResolveClassPass $resolveClassPass = null)
+    {
+        if (null === $resolveClassPass) {
+            @trigger_error('The '.__CLASS__.' class is deprecated since Symfony 3.3 and will be removed in 4.0.', E_USER_DEPRECATED);
+        }
+        $this->resolveClassPass = $resolveClassPass;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        // works only since php 7.0 and hhvm 3.11
+        if (!method_exists(\ReflectionMethod::class, 'getReturnType')) {
+            return;
+        }
+        $resolveClassPassChanges = null !== $this->resolveClassPass ? $this->resolveClassPass->getChanges() : array();
+
+        foreach ($container->getDefinitions() as $id => $definition) {
+            $this->updateDefinition($container, $id, $definition, $resolveClassPassChanges);
+        }
+    }
+
+    private function updateDefinition(ContainerBuilder $container, $id, Definition $definition, array $resolveClassPassChanges, array $previous = array())
+    {
+        // circular reference
+        if (isset($previous[$id])) {
+            return;
+        }
+
+        $factory = $definition->getFactory();
+        if (null === $factory || (!isset($resolveClassPassChanges[$id]) && null !== $definition->getClass())) {
+            return;
+        }
+
+        $class = null;
+        if (\is_string($factory)) {
+            try {
+                $m = new \ReflectionFunction($factory);
+                if (false !== $m->getFileName() && file_exists($m->getFileName())) {
+                    $container->fileExists($m->getFileName());
+                }
+            } catch (\ReflectionException $e) {
+                return;
+            }
+        } else {
+            if ($factory[0] instanceof Reference) {
+                $previous[$id] = true;
+                $factoryId = $container->normalizeId($factory[0]);
+                $factoryDefinition = $container->findDefinition($factoryId);
+                $this->updateDefinition($container, $factoryId, $factoryDefinition, $resolveClassPassChanges, $previous);
+                $class = $factoryDefinition->getClass();
+            } else {
+                $class = $factory[0];
+            }
+
+            if (!$m = $container->getReflectionClass($class, false)) {
+                return;
+            }
+            try {
+                $m = $m->getMethod($factory[1]);
+            } catch (\ReflectionException $e) {
+                return;
+            }
+        }
+
+        $returnType = $m->getReturnType();
+        if (null !== $returnType && !$returnType->isBuiltin()) {
+            $returnType = $returnType instanceof \ReflectionNamedType ? $returnType->getName() : $returnType->__toString();
+            if (null !== $class) {
+                $declaringClass = $m->getDeclaringClass()->getName();
+                if ('self' === strtolower($returnType)) {
+                    $returnType = $declaringClass;
+                } elseif ('parent' === strtolower($returnType)) {
+                    $returnType = get_parent_class($declaringClass) ?: null;
+                }
+            }
+
+            if (null !== $returnType && (!isset($resolveClassPassChanges[$id]) || $returnType !== $resolveClassPassChanges[$id])) {
+                @trigger_error(sprintf('Relying on its factory\'s return-type to define the class of service "%s" is deprecated since Symfony 3.3 and won\'t work in 4.0. Set the "class" attribute to "%s" on the service definition instead.', $id, $returnType), E_USER_DEPRECATED);
+            }
+            $definition->setClass($returnType);
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/InlineServiceDefinitionsPass.php

@@ -0,0 +1,147 @@
+<?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\Argument\ArgumentInterface;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Inline service definitions where this is possible.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class InlineServiceDefinitionsPass extends AbstractRecursivePass implements RepeatablePassInterface
+{
+    private $cloningIds = array();
+    private $inlinedServiceIds = array();
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setRepeatedPass(RepeatedPass $repeatedPass)
+    {
+        // no-op for BC
+    }
+
+    /**
+     * Returns an array of all services inlined by this pass.
+     *
+     * The key is the inlined service id and its value is the list of services it was inlined into.
+     *
+     * @deprecated since version 3.4, to be removed in 4.0.
+     *
+     * @return array
+     */
+    public function getInlinedServiceIds()
+    {
+        @trigger_error('Calling InlineServiceDefinitionsPass::getInlinedServiceIds() is deprecated since Symfony 3.4 and will be removed in 4.0.', E_USER_DEPRECATED);
+
+        return $this->inlinedServiceIds;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if ($value instanceof ArgumentInterface) {
+            // Reference found in ArgumentInterface::getValues() are not inlineable
+            return $value;
+        }
+
+        if ($value instanceof Definition && $this->cloningIds) {
+            if ($value->isShared()) {
+                return $value;
+            }
+            $value = clone $value;
+        }
+
+        if (!$value instanceof Reference || !$this->container->hasDefinition($id = $this->container->normalizeId($value))) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        $definition = $this->container->getDefinition($id);
+
+        if (!$this->isInlineableDefinition($id, $definition, $this->container->getCompiler()->getServiceReferenceGraph())) {
+            return $value;
+        }
+
+        $this->container->log($this, sprintf('Inlined service "%s" to "%s".', $id, $this->currentId));
+        $this->inlinedServiceIds[$id][] = $this->currentId;
+
+        if ($definition->isShared()) {
+            return $definition;
+        }
+
+        if (isset($this->cloningIds[$id])) {
+            $ids = array_keys($this->cloningIds);
+            $ids[] = $id;
+
+            throw new ServiceCircularReferenceException($id, \array_slice($ids, array_search($id, $ids)));
+        }
+
+        $this->cloningIds[$id] = true;
+        try {
+            return $this->processValue($definition);
+        } finally {
+            unset($this->cloningIds[$id]);
+        }
+    }
+
+    /**
+     * Checks if the definition is inlineable.
+     *
+     * @return bool If the definition is inlineable
+     */
+    private function isInlineableDefinition($id, Definition $definition, ServiceReferenceGraph $graph)
+    {
+        if ($definition->getErrors() || $definition->isDeprecated() || $definition->isLazy() || $definition->isSynthetic()) {
+            return false;
+        }
+
+        if (!$definition->isShared()) {
+            return true;
+        }
+
+        if ($definition->isPublic() || $definition->isPrivate()) {
+            return false;
+        }
+
+        if (!$graph->hasNode($id)) {
+            return true;
+        }
+
+        if ($this->currentId == $id) {
+            return false;
+        }
+
+        $ids = array();
+        foreach ($graph->getNode($id)->getInEdges() as $edge) {
+            if ($edge->isWeak()) {
+                return false;
+            }
+            $ids[] = $edge->getSourceNode()->getId();
+        }
+
+        if (\count(array_unique($ids)) > 1) {
+            return false;
+        }
+
+        if (\count($ids) > 1 && \is_array($factory = $definition->getFactory()) && ($factory[0] instanceof Reference || $factory[0] instanceof Definition)) {
+            return false;
+        }
+
+        return !$ids || $this->container->getDefinition($ids[0])->isShared();
+    }
+}

vendor/symfony/dependency-injection/Compiler/LoggingFormatter.php

@@ -0,0 +1,54 @@
+<?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;
+
+@trigger_error('The '.__NAMESPACE__.'\LoggingFormatter class is deprecated since Symfony 3.3 and will be removed in 4.0. Use the ContainerBuilder::log() method instead.', E_USER_DEPRECATED);
+
+/**
+ * Used to format logging messages during the compilation.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ *
+ * @deprecated since version 3.3, to be removed in 4.0. Use the ContainerBuilder::log() method instead.
+ */
+class LoggingFormatter
+{
+    public function formatRemoveService(CompilerPassInterface $pass, $id, $reason)
+    {
+        return $this->format($pass, sprintf('Removed service "%s"; reason: %s.', $id, $reason));
+    }
+
+    public function formatInlineService(CompilerPassInterface $pass, $id, $target)
+    {
+        return $this->format($pass, sprintf('Inlined service "%s" to "%s".', $id, $target));
+    }
+
+    public function formatUpdateReference(CompilerPassInterface $pass, $serviceId, $oldDestId, $newDestId)
+    {
+        return $this->format($pass, sprintf('Changed reference of service "%s" previously pointing to "%s" to "%s".', $serviceId, $oldDestId, $newDestId));
+    }
+
+    public function formatResolveInheritance(CompilerPassInterface $pass, $childId, $parentId)
+    {
+        return $this->format($pass, sprintf('Resolving inheritance for "%s" (parent: %s).', $childId, $parentId));
+    }
+
+    public function formatUnusedAutowiringPatterns(CompilerPassInterface $pass, $id, array $patterns)
+    {
+        return $this->format($pass, sprintf('Autowiring\'s patterns "%s" for service "%s" don\'t match any method.', implode('", "', $patterns), $id));
+    }
+
+    public function format(CompilerPassInterface $pass, $message)
+    {
+        return sprintf('%s: %s', \get_class($pass), $message);
+    }
+}

vendor/symfony/dependency-injection/Compiler/MergeExtensionConfigurationPass.php

@@ -0,0 +1,202 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Extension\ConfigurationExtensionInterface;
+use Symfony\Component\DependencyInjection\Extension\Extension;
+use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
+use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
+use Symfony\Component\DependencyInjection\ParameterBag\EnvPlaceholderParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * Merges extension configs into the container builder.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class MergeExtensionConfigurationPass implements CompilerPassInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        $parameters = $container->getParameterBag()->all();
+        $definitions = $container->getDefinitions();
+        $aliases = $container->getAliases();
+        $exprLangProviders = $container->getExpressionLanguageProviders();
+
+        foreach ($container->getExtensions() as $extension) {
+            if ($extension instanceof PrependExtensionInterface) {
+                $extension->prepend($container);
+            }
+        }
+
+        foreach ($container->getExtensions() as $name => $extension) {
+            if (!$config = $container->getExtensionConfig($name)) {
+                // this extension was not called
+                continue;
+            }
+            $resolvingBag = $container->getParameterBag();
+            if ($resolvingBag instanceof EnvPlaceholderParameterBag && $extension instanceof Extension) {
+                // create a dedicated bag so that we can track env vars per-extension
+                $resolvingBag = new MergeExtensionConfigurationParameterBag($resolvingBag);
+            }
+            $config = $resolvingBag->resolveValue($config);
+
+            try {
+                $tmpContainer = new MergeExtensionConfigurationContainerBuilder($extension, $resolvingBag);
+                $tmpContainer->setResourceTracking($container->isTrackingResources());
+                $tmpContainer->addObjectResource($extension);
+                if ($extension instanceof ConfigurationExtensionInterface && null !== $configuration = $extension->getConfiguration($config, $tmpContainer)) {
+                    $tmpContainer->addObjectResource($configuration);
+                }
+
+                foreach ($exprLangProviders as $provider) {
+                    $tmpContainer->addExpressionLanguageProvider($provider);
+                }
+
+                $extension->load($config, $tmpContainer);
+            } catch (\Exception $e) {
+                if ($resolvingBag instanceof MergeExtensionConfigurationParameterBag) {
+                    $container->getParameterBag()->mergeEnvPlaceholders($resolvingBag);
+                }
+
+                throw $e;
+            }
+
+            if ($resolvingBag instanceof MergeExtensionConfigurationParameterBag) {
+                // don't keep track of env vars that are *overridden* when configs are merged
+                $resolvingBag->freezeAfterProcessing($extension, $tmpContainer);
+            }
+
+            $container->merge($tmpContainer);
+            $container->getParameterBag()->add($parameters);
+        }
+
+        $container->addDefinitions($definitions);
+        $container->addAliases($aliases);
+    }
+}
+
+/**
+ * @internal
+ */
+class MergeExtensionConfigurationParameterBag extends EnvPlaceholderParameterBag
+{
+    private $processedEnvPlaceholders;
+
+    public function __construct(parent $parameterBag)
+    {
+        parent::__construct($parameterBag->all());
+        $this->mergeEnvPlaceholders($parameterBag);
+    }
+
+    public function freezeAfterProcessing(Extension $extension, ContainerBuilder $container)
+    {
+        if (!$config = $extension->getProcessedConfigs()) {
+            // Extension::processConfiguration() wasn't called, we cannot know how configs were merged
+            return;
+        }
+        $this->processedEnvPlaceholders = array();
+
+        // serialize config and container to catch env vars nested in object graphs
+        $config = serialize($config).serialize($container->getDefinitions()).serialize($container->getAliases()).serialize($container->getParameterBag()->all());
+
+        foreach (parent::getEnvPlaceholders() as $env => $placeholders) {
+            foreach ($placeholders as $placeholder) {
+                if (false !== stripos($config, $placeholder)) {
+                    $this->processedEnvPlaceholders[$env] = $placeholders;
+                    break;
+                }
+            }
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getEnvPlaceholders()
+    {
+        return null !== $this->processedEnvPlaceholders ? $this->processedEnvPlaceholders : parent::getEnvPlaceholders();
+    }
+}
+
+/**
+ * A container builder preventing using methods that wouldn't have any effect from extensions.
+ *
+ * @internal
+ */
+class MergeExtensionConfigurationContainerBuilder extends ContainerBuilder
+{
+    private $extensionClass;
+
+    public function __construct(ExtensionInterface $extension, ParameterBagInterface $parameterBag = null)
+    {
+        parent::__construct($parameterBag);
+
+        $this->extensionClass = \get_class($extension);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function addCompilerPass(CompilerPassInterface $pass, $type = PassConfig::TYPE_BEFORE_OPTIMIZATION/*, int $priority = 0*/)
+    {
+        throw new LogicException(sprintf('You cannot add compiler pass "%s" from extension "%s". Compiler passes must be registered before the container is compiled.', \get_class($pass), $this->extensionClass));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function registerExtension(ExtensionInterface $extension)
+    {
+        throw new LogicException(sprintf('You cannot register extension "%s" from "%s". Extensions must be registered before the container is compiled.', \get_class($extension), $this->extensionClass));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function compile($resolveEnvPlaceholders = false)
+    {
+        throw new LogicException(sprintf('Cannot compile the container in extension "%s".', $this->extensionClass));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function resolveEnvPlaceholders($value, $format = null, array &$usedEnvs = null)
+    {
+        if (true !== $format || !\is_string($value)) {
+            return parent::resolveEnvPlaceholders($value, $format, $usedEnvs);
+        }
+
+        $bag = $this->getParameterBag();
+        $value = $bag->resolveValue($value);
+
+        foreach ($bag->getEnvPlaceholders() as $env => $placeholders) {
+            if (false === strpos($env, ':')) {
+                continue;
+            }
+            foreach ($placeholders as $placeholder) {
+                if (false !== stripos($value, $placeholder)) {
+                    throw new RuntimeException(sprintf('Using a cast in "env(%s)" is incompatible with resolution at compile time in "%s". The logic in the extension should be moved to a compiler pass, or an env parameter with no cast should be used instead.', $env, $this->extensionClass));
+                }
+            }
+        }
+
+        return parent::resolveEnvPlaceholders($value, $format, $usedEnvs);
+    }
+}

vendor/symfony/dependency-injection/Compiler/PassConfig.php

@@ -0,0 +1,283 @@
+<?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\Exception\InvalidArgumentException;
+
+/**
+ * Compiler Pass Configuration.
+ *
+ * This class has a default configuration embedded.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class PassConfig
+{
+    const TYPE_AFTER_REMOVING = 'afterRemoving';
+    const TYPE_BEFORE_OPTIMIZATION = 'beforeOptimization';
+    const TYPE_BEFORE_REMOVING = 'beforeRemoving';
+    const TYPE_OPTIMIZE = 'optimization';
+    const TYPE_REMOVE = 'removing';
+
+    private $mergePass;
+    private $afterRemovingPasses = array();
+    private $beforeOptimizationPasses = array();
+    private $beforeRemovingPasses = array();
+    private $optimizationPasses;
+    private $removingPasses;
+
+    public function __construct()
+    {
+        $this->mergePass = new MergeExtensionConfigurationPass();
+
+        $this->beforeOptimizationPasses = array(
+            100 => array(
+                $resolveClassPass = new ResolveClassPass(),
+                new ResolveInstanceofConditionalsPass(),
+                new RegisterEnvVarProcessorsPass(),
+            ),
+            -1000 => array(new ExtensionCompilerPass()),
+        );
+
+        $this->optimizationPasses = array(array(
+            new ResolveChildDefinitionsPass(),
+            new ServiceLocatorTagPass(),
+            new DecoratorServicePass(),
+            new ResolveParameterPlaceHoldersPass(false),
+            new ResolveFactoryClassPass(),
+            new FactoryReturnTypePass($resolveClassPass),
+            new CheckDefinitionValidityPass(),
+            new RegisterServiceSubscribersPass(),
+            new ResolveNamedArgumentsPass(),
+            new AutowireRequiredMethodsPass(),
+            new ResolveBindingsPass(),
+            new AutowirePass(false),
+            new ResolveTaggedIteratorArgumentPass(),
+            new ResolveServiceSubscribersPass(),
+            new ResolveReferencesToAliasesPass(),
+            new ResolveInvalidReferencesPass(),
+            new AnalyzeServiceReferencesPass(true),
+            new CheckCircularReferencesPass(),
+            new CheckReferenceValidityPass(),
+            new CheckArgumentsValidityPass(false),
+        ));
+
+        $this->beforeRemovingPasses = array(
+            -100 => array(
+                new ResolvePrivatesPass(),
+            ),
+        );
+
+        $this->removingPasses = array(array(
+            new RemovePrivateAliasesPass(),
+            new ReplaceAliasByActualDefinitionPass(),
+            new RemoveAbstractDefinitionsPass(),
+            new RepeatedPass(array(
+                new AnalyzeServiceReferencesPass(),
+                new InlineServiceDefinitionsPass(),
+                new AnalyzeServiceReferencesPass(),
+                new RemoveUnusedDefinitionsPass(),
+            )),
+            new DefinitionErrorExceptionPass(),
+            new CheckExceptionOnInvalidReferenceBehaviorPass(),
+            new ResolveHotPathPass(),
+        ));
+    }
+
+    /**
+     * Returns all passes in order to be processed.
+     *
+     * @return CompilerPassInterface[]
+     */
+    public function getPasses()
+    {
+        return array_merge(
+            array($this->mergePass),
+            $this->getBeforeOptimizationPasses(),
+            $this->getOptimizationPasses(),
+            $this->getBeforeRemovingPasses(),
+            $this->getRemovingPasses(),
+            $this->getAfterRemovingPasses()
+        );
+    }
+
+    /**
+     * Adds a pass.
+     *
+     * @param CompilerPassInterface $pass     A Compiler pass
+     * @param string                $type     The pass type
+     * @param int                   $priority Used to sort the passes
+     *
+     * @throws InvalidArgumentException when a pass type doesn't exist
+     */
+    public function addPass(CompilerPassInterface $pass, $type = self::TYPE_BEFORE_OPTIMIZATION/*, int $priority = 0*/)
+    {
+        if (\func_num_args() >= 3) {
+            $priority = func_get_arg(2);
+        } else {
+            if (__CLASS__ !== \get_class($this)) {
+                $r = new \ReflectionMethod($this, __FUNCTION__);
+                if (__CLASS__ !== $r->getDeclaringClass()->getName()) {
+                    @trigger_error(sprintf('Method %s() will have a third `int $priority = 0` argument in version 4.0. Not defining it is deprecated since Symfony 3.2.', __METHOD__), E_USER_DEPRECATED);
+                }
+            }
+
+            $priority = 0;
+        }
+
+        $property = $type.'Passes';
+        if (!isset($this->$property)) {
+            throw new InvalidArgumentException(sprintf('Invalid type "%s".', $type));
+        }
+
+        $passes = &$this->$property;
+
+        if (!isset($passes[$priority])) {
+            $passes[$priority] = array();
+        }
+        $passes[$priority][] = $pass;
+    }
+
+    /**
+     * Gets all passes for the AfterRemoving pass.
+     *
+     * @return CompilerPassInterface[]
+     */
+    public function getAfterRemovingPasses()
+    {
+        return $this->sortPasses($this->afterRemovingPasses);
+    }
+
+    /**
+     * Gets all passes for the BeforeOptimization pass.
+     *
+     * @return CompilerPassInterface[]
+     */
+    public function getBeforeOptimizationPasses()
+    {
+        return $this->sortPasses($this->beforeOptimizationPasses);
+    }
+
+    /**
+     * Gets all passes for the BeforeRemoving pass.
+     *
+     * @return CompilerPassInterface[]
+     */
+    public function getBeforeRemovingPasses()
+    {
+        return $this->sortPasses($this->beforeRemovingPasses);
+    }
+
+    /**
+     * Gets all passes for the Optimization pass.
+     *
+     * @return CompilerPassInterface[]
+     */
+    public function getOptimizationPasses()
+    {
+        return $this->sortPasses($this->optimizationPasses);
+    }
+
+    /**
+     * Gets all passes for the Removing pass.
+     *
+     * @return CompilerPassInterface[]
+     */
+    public function getRemovingPasses()
+    {
+        return $this->sortPasses($this->removingPasses);
+    }
+
+    /**
+     * Gets the Merge pass.
+     *
+     * @return CompilerPassInterface
+     */
+    public function getMergePass()
+    {
+        return $this->mergePass;
+    }
+
+    public function setMergePass(CompilerPassInterface $pass)
+    {
+        $this->mergePass = $pass;
+    }
+
+    /**
+     * Sets the AfterRemoving passes.
+     *
+     * @param CompilerPassInterface[] $passes
+     */
+    public function setAfterRemovingPasses(array $passes)
+    {
+        $this->afterRemovingPasses = array($passes);
+    }
+
+    /**
+     * Sets the BeforeOptimization passes.
+     *
+     * @param CompilerPassInterface[] $passes
+     */
+    public function setBeforeOptimizationPasses(array $passes)
+    {
+        $this->beforeOptimizationPasses = array($passes);
+    }
+
+    /**
+     * Sets the BeforeRemoving passes.
+     *
+     * @param CompilerPassInterface[] $passes
+     */
+    public function setBeforeRemovingPasses(array $passes)
+    {
+        $this->beforeRemovingPasses = array($passes);
+    }
+
+    /**
+     * Sets the Optimization passes.
+     *
+     * @param CompilerPassInterface[] $passes
+     */
+    public function setOptimizationPasses(array $passes)
+    {
+        $this->optimizationPasses = array($passes);
+    }
+
+    /**
+     * Sets the Removing passes.
+     *
+     * @param CompilerPassInterface[] $passes
+     */
+    public function setRemovingPasses(array $passes)
+    {
+        $this->removingPasses = array($passes);
+    }
+
+    /**
+     * Sort passes by priority.
+     *
+     * @param array $passes CompilerPassInterface instances with their priority as key
+     *
+     * @return CompilerPassInterface[]
+     */
+    private function sortPasses(array $passes)
+    {
+        if (0 === \count($passes)) {
+            return array();
+        }
+
+        krsort($passes);
+
+        // Flatten the array
+        return \call_user_func_array('array_merge', $passes);
+    }
+}

vendor/symfony/dependency-injection/Compiler/PriorityTaggedServiceTrait.php

@@ -0,0 +1,55 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Trait that allows a generic method to find and sort service by priority option in the tag.
+ *
+ * @author Iltar van der Berg <kjarli@gmail.com>
+ */
+trait PriorityTaggedServiceTrait
+{
+    /**
+     * Finds all services with the given tag name and order them by their priority.
+     *
+     * The order of additions must be respected for services having the same priority,
+     * and knowing that the \SplPriorityQueue class does not respect the FIFO method,
+     * we should not use that class.
+     *
+     * @see https://bugs.php.net/bug.php?id=53710
+     * @see https://bugs.php.net/bug.php?id=60926
+     *
+     * @param string           $tagName
+     * @param ContainerBuilder $container
+     *
+     * @return Reference[]
+     */
+    private function findAndSortTaggedServices($tagName, ContainerBuilder $container)
+    {
+        $services = array();
+
+        foreach ($container->findTaggedServiceIds($tagName, true) as $serviceId => $attributes) {
+            $priority = isset($attributes[0]['priority']) ? $attributes[0]['priority'] : 0;
+            $services[$priority][] = new Reference($serviceId);
+        }
+
+        if ($services) {
+            krsort($services);
+            $services = \call_user_func_array('array_merge', $services);
+        }
+
+        return $services;
+    }
+}

vendor/symfony/dependency-injection/Compiler/RegisterEnvVarProcessorsPass.php

@@ -0,0 +1,78 @@
+<?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\Argument\ServiceClosureArgument;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\EnvVarProcessor;
+use Symfony\Component\DependencyInjection\EnvVarProcessorInterface;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\ParameterBag\EnvPlaceholderParameterBag;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\ServiceLocator;
+
+/**
+ * Creates the container.env_var_processors_locator service.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class RegisterEnvVarProcessorsPass implements CompilerPassInterface
+{
+    private static $allowedTypes = array('array', 'bool', 'float', 'int', 'string');
+
+    public function process(ContainerBuilder $container)
+    {
+        $bag = $container->getParameterBag();
+        $types = array();
+        $processors = array();
+        foreach ($container->findTaggedServiceIds('container.env_var_processor') as $id => $tags) {
+            if (!$r = $container->getReflectionClass($class = $container->getDefinition($id)->getClass())) {
+                throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $id));
+            } elseif (!$r->isSubclassOf(EnvVarProcessorInterface::class)) {
+                throw new InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $id, EnvVarProcessorInterface::class));
+            }
+            foreach ($class::getProvidedTypes() as $prefix => $type) {
+                $processors[$prefix] = new ServiceClosureArgument(new Reference($id));
+                $types[$prefix] = self::validateProvidedTypes($type, $class);
+            }
+        }
+
+        if ($bag instanceof EnvPlaceholderParameterBag) {
+            foreach (EnvVarProcessor::getProvidedTypes() as $prefix => $type) {
+                if (!isset($types[$prefix])) {
+                    $types[$prefix] = self::validateProvidedTypes($type, EnvVarProcessor::class);
+                }
+            }
+            $bag->setProvidedTypes($types);
+        }
+
+        if ($processors) {
+            $container->register('container.env_var_processors_locator', ServiceLocator::class)
+                ->setPublic(true)
+                ->setArguments(array($processors))
+            ;
+        }
+    }
+
+    private static function validateProvidedTypes($types, $class)
+    {
+        $types = explode('|', $types);
+
+        foreach ($types as $type) {
+            if (!\in_array($type, self::$allowedTypes)) {
+                throw new InvalidArgumentException(sprintf('Invalid type "%s" returned by "%s::getProvidedTypes()", expected one of "%s".', $type, $class, implode('", "', self::$allowedTypes)));
+            }
+        }
+
+        return $types;
+    }
+}

vendor/symfony/dependency-injection/Compiler/RegisterServiceSubscribersPass.php

@@ -0,0 +1,101 @@
+<?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\ContainerInterface;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\ServiceSubscriberInterface;
+use Symfony\Component\DependencyInjection\TypedReference;
+
+/**
+ * Compiler pass to register tagged services that require a service locator.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class RegisterServiceSubscribersPass extends AbstractRecursivePass
+{
+    protected function processValue($value, $isRoot = false)
+    {
+        if (!$value instanceof Definition || $value->isAbstract() || $value->isSynthetic() || !$value->hasTag('container.service_subscriber')) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        $serviceMap = array();
+        $autowire = $value->isAutowired();
+
+        foreach ($value->getTag('container.service_subscriber') as $attributes) {
+            if (!$attributes) {
+                $autowire = true;
+                continue;
+            }
+            ksort($attributes);
+            if (array() !== array_diff(array_keys($attributes), array('id', 'key'))) {
+                throw new InvalidArgumentException(sprintf('The "container.service_subscriber" tag accepts only the "key" and "id" attributes, "%s" given for service "%s".', implode('", "', array_keys($attributes)), $this->currentId));
+            }
+            if (!array_key_exists('id', $attributes)) {
+                throw new InvalidArgumentException(sprintf('Missing "id" attribute on "container.service_subscriber" tag with key="%s" for service "%s".', $attributes['key'], $this->currentId));
+            }
+            if (!array_key_exists('key', $attributes)) {
+                $attributes['key'] = $attributes['id'];
+            }
+            if (isset($serviceMap[$attributes['key']])) {
+                continue;
+            }
+            $serviceMap[$attributes['key']] = new Reference($attributes['id']);
+        }
+        $class = $value->getClass();
+
+        if (!$r = $this->container->getReflectionClass($class)) {
+            throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $this->currentId));
+        }
+        if (!$r->isSubclassOf(ServiceSubscriberInterface::class)) {
+            throw new InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $this->currentId, ServiceSubscriberInterface::class));
+        }
+        $class = $r->name;
+
+        $subscriberMap = array();
+        $declaringClass = (new \ReflectionMethod($class, 'getSubscribedServices'))->class;
+
+        foreach ($class::getSubscribedServices() as $key => $type) {
+            if (!\is_string($type) || !preg_match('/^\??[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\\\\[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+)*+$/', $type)) {
+                throw new InvalidArgumentException(sprintf('"%s::getSubscribedServices()" must return valid PHP types for service "%s" key "%s", "%s" returned.', $class, $this->currentId, $key, \is_string($type) ? $type : \gettype($type)));
+            }
+            if ($optionalBehavior = '?' === $type[0]) {
+                $type = substr($type, 1);
+                $optionalBehavior = ContainerInterface::IGNORE_ON_INVALID_REFERENCE;
+            }
+            if (\is_int($key)) {
+                $key = $type;
+            }
+            if (!isset($serviceMap[$key])) {
+                if (!$autowire) {
+                    throw new InvalidArgumentException(sprintf('Service "%s" misses a "container.service_subscriber" tag with "key"/"id" attributes corresponding to entry "%s" as returned by "%s::getSubscribedServices()".', $this->currentId, $key, $class));
+                }
+                $serviceMap[$key] = new Reference($type);
+            }
+
+            $subscriberMap[$key] = new TypedReference($this->container->normalizeId($serviceMap[$key]), $type, $declaringClass, $optionalBehavior ?: ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE);
+            unset($serviceMap[$key]);
+        }
+
+        if ($serviceMap = array_keys($serviceMap)) {
+            $message = sprintf(1 < \count($serviceMap) ? 'keys "%s" do' : 'key "%s" does', str_replace('%', '%%', implode('", "', $serviceMap)));
+            throw new InvalidArgumentException(sprintf('Service %s not exist in the map returned by "%s::getSubscribedServices()" for service "%s".', $message, $class, $this->currentId));
+        }
+
+        $value->addTag('container.service_subscriber.locator', array('id' => (string) ServiceLocatorTagPass::register($this->container, $subscriberMap, $this->currentId)));
+
+        return parent::processValue($value);
+    }
+}

vendor/symfony/dependency-injection/Compiler/RemoveAbstractDefinitionsPass.php

@@ -0,0 +1,33 @@
+<?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\ContainerBuilder;
+
+/**
+ * Removes abstract Definitions.
+ */
+class RemoveAbstractDefinitionsPass implements CompilerPassInterface
+{
+    /**
+     * Removes abstract definitions from the ContainerBuilder.
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->getDefinitions() as $id => $definition) {
+            if ($definition->isAbstract()) {
+                $container->removeDefinition($id);
+                $container->log($this, sprintf('Removed service "%s"; reason: abstract.', $id));
+            }
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/RemovePrivateAliasesPass.php

@@ -0,0 +1,39 @@
+<?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\ContainerBuilder;
+
+/**
+ * Remove private aliases from the container. They were only used to establish
+ * dependencies between services, and these dependencies have been resolved in
+ * one of the previous passes.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class RemovePrivateAliasesPass implements CompilerPassInterface
+{
+    /**
+     * Removes private aliases from the ContainerBuilder.
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->getAliases() as $id => $alias) {
+            if ($alias->isPublic() || $alias->isPrivate()) {
+                continue;
+            }
+
+            $container->removeAlias($id);
+            $container->log($this, sprintf('Removed service "%s"; reason: private alias.', $id));
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/RemoveUnusedDefinitionsPass.php

@@ -0,0 +1,85 @@
+<?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\ContainerBuilder;
+
+/**
+ * Removes unused service definitions from the container.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class RemoveUnusedDefinitionsPass implements RepeatablePassInterface
+{
+    private $repeatedPass;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setRepeatedPass(RepeatedPass $repeatedPass)
+    {
+        $this->repeatedPass = $repeatedPass;
+    }
+
+    /**
+     * Processes the ContainerBuilder to remove unused definitions.
+     */
+    public function process(ContainerBuilder $container)
+    {
+        $graph = $container->getCompiler()->getServiceReferenceGraph();
+
+        $hasChanged = false;
+        foreach ($container->getDefinitions() as $id => $definition) {
+            if ($definition->isPublic() || $definition->isPrivate()) {
+                continue;
+            }
+
+            if ($graph->hasNode($id)) {
+                $edges = $graph->getNode($id)->getInEdges();
+                $referencingAliases = array();
+                $sourceIds = array();
+                foreach ($edges as $edge) {
+                    if ($edge->isWeak()) {
+                        continue;
+                    }
+                    $node = $edge->getSourceNode();
+                    $sourceIds[] = $node->getId();
+
+                    if ($node->isAlias()) {
+                        $referencingAliases[] = $node->getValue();
+                    }
+                }
+                $isReferenced = (\count(array_unique($sourceIds)) - \count($referencingAliases)) > 0;
+            } else {
+                $referencingAliases = array();
+                $isReferenced = false;
+            }
+
+            if (1 === \count($referencingAliases) && false === $isReferenced) {
+                $container->setDefinition((string) reset($referencingAliases), $definition);
+                $definition->setPublic(!$definition->isPrivate());
+                $definition->setPrivate(reset($referencingAliases)->isPrivate());
+                $container->removeDefinition($id);
+                $container->log($this, sprintf('Removed service "%s"; reason: replaces alias %s.', $id, reset($referencingAliases)));
+            } elseif (0 === \count($referencingAliases) && false === $isReferenced) {
+                $container->removeDefinition($id);
+                $container->resolveEnvPlaceholders(serialize($definition));
+                $container->log($this, sprintf('Removed service "%s"; reason: unused.', $id));
+                $hasChanged = true;
+            }
+        }
+
+        if ($hasChanged) {
+            $this->repeatedPass->setRepeat();
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/RepeatablePassInterface.php

@@ -0,0 +1,23 @@
+<?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;
+
+/**
+ * Interface that must be implemented by passes that are run as part of an
+ * RepeatedPass.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+interface RepeatablePassInterface extends CompilerPassInterface
+{
+    public function setRepeatedPass(RepeatedPass $repeatedPass);
+}

vendor/symfony/dependency-injection/Compiler/RepeatedPass.php

@@ -0,0 +1,79 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+
+/**
+ * A pass that might be run repeatedly.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class RepeatedPass implements CompilerPassInterface
+{
+    /**
+     * @var bool
+     */
+    private $repeat = false;
+
+    private $passes;
+
+    /**
+     * @param RepeatablePassInterface[] $passes An array of RepeatablePassInterface objects
+     *
+     * @throws InvalidArgumentException when the passes don't implement RepeatablePassInterface
+     */
+    public function __construct(array $passes)
+    {
+        foreach ($passes as $pass) {
+            if (!$pass instanceof RepeatablePassInterface) {
+                throw new InvalidArgumentException('$passes must be an array of RepeatablePassInterface.');
+            }
+
+            $pass->setRepeatedPass($this);
+        }
+
+        $this->passes = $passes;
+    }
+
+    /**
+     * Process the repeatable passes that run more than once.
+     */
+    public function process(ContainerBuilder $container)
+    {
+        do {
+            $this->repeat = false;
+            foreach ($this->passes as $pass) {
+                $pass->process($container);
+            }
+        } while ($this->repeat);
+    }
+
+    /**
+     * Sets if the pass should repeat.
+     */
+    public function setRepeat()
+    {
+        $this->repeat = true;
+    }
+
+    /**
+     * Returns the passes.
+     *
+     * @return RepeatablePassInterface[] An array of RepeatablePassInterface objects
+     */
+    public function getPasses()
+    {
+        return $this->passes;
+    }
+}

vendor/symfony/dependency-injection/Compiler/ReplaceAliasByActualDefinitionPass.php

@@ -0,0 +1,89 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Replaces aliases with actual service definitions, effectively removing these
+ * aliases.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ReplaceAliasByActualDefinitionPass extends AbstractRecursivePass
+{
+    private $replacements;
+
+    /**
+     * Process the Container to replace aliases with service definitions.
+     *
+     * @throws InvalidArgumentException if the service definition does not exist
+     */
+    public function process(ContainerBuilder $container)
+    {
+        // First collect all alias targets that need to be replaced
+        $seenAliasTargets = array();
+        $replacements = array();
+        foreach ($container->getAliases() as $definitionId => $target) {
+            $targetId = $container->normalizeId($target);
+            // Special case: leave this target alone
+            if ('service_container' === $targetId) {
+                continue;
+            }
+            // Check if target needs to be replaces
+            if (isset($replacements[$targetId])) {
+                $container->setAlias($definitionId, $replacements[$targetId])->setPublic($target->isPublic())->setPrivate($target->isPrivate());
+            }
+            // No need to process the same target twice
+            if (isset($seenAliasTargets[$targetId])) {
+                continue;
+            }
+            // Process new target
+            $seenAliasTargets[$targetId] = true;
+            try {
+                $definition = $container->getDefinition($targetId);
+            } catch (InvalidArgumentException $e) {
+                throw new InvalidArgumentException(sprintf('Unable to replace alias "%s" with actual definition "%s".', $definitionId, $targetId), null, $e);
+            }
+            if ($definition->isPublic() || $definition->isPrivate()) {
+                continue;
+            }
+            // Remove private definition and schedule for replacement
+            $definition->setPublic(!$target->isPrivate());
+            $definition->setPrivate($target->isPrivate());
+            $container->setDefinition($definitionId, $definition);
+            $container->removeDefinition($targetId);
+            $replacements[$targetId] = $definitionId;
+        }
+        $this->replacements = $replacements;
+
+        parent::process($container);
+        $this->replacements = array();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if ($value instanceof Reference && isset($this->replacements[$referenceId = $this->container->normalizeId($value)])) {
+            // Perform the replacement
+            $newId = $this->replacements[$referenceId];
+            $value = new Reference($newId, $value->getInvalidBehavior());
+            $this->container->log($this, sprintf('Changed reference of service "%s" previously pointing to "%s" to "%s".', $this->currentId, $referenceId, $newId));
+        }
+
+        return parent::processValue($value, $isRoot);
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveBindingsPass.php

@@ -0,0 +1,171 @@
+<?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\Argument\BoundArgument;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\LazyProxy\ProxyHelper;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\TypedReference;
+
+/**
+ * @author Guilhem Niot <guilhem.niot@gmail.com>
+ */
+class ResolveBindingsPass extends AbstractRecursivePass
+{
+    private $usedBindings = array();
+    private $unusedBindings = array();
+    private $errorMessages = array();
+
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        try {
+            parent::process($container);
+
+            foreach ($this->unusedBindings as list($key, $serviceId)) {
+                $message = sprintf('Unused binding "%s" in service "%s".', $key, $serviceId);
+                if ($this->errorMessages) {
+                    $message .= sprintf("\nCould be related to%s:", 1 < \count($this->errorMessages) ? ' one of' : '');
+                }
+                foreach ($this->errorMessages as $m) {
+                    $message .= "\n - ".$m;
+                }
+                throw new InvalidArgumentException($message);
+            }
+        } finally {
+            $this->usedBindings = array();
+            $this->unusedBindings = array();
+            $this->errorMessages = array();
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if ($value instanceof TypedReference && $value->getType() === $this->container->normalizeId($value)) {
+            // Already checked
+            $bindings = $this->container->getDefinition($this->currentId)->getBindings();
+
+            if (isset($bindings[$value->getType()])) {
+                return $this->getBindingValue($bindings[$value->getType()]);
+            }
+
+            return parent::processValue($value, $isRoot);
+        }
+
+        if (!$value instanceof Definition || !$bindings = $value->getBindings()) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        foreach ($bindings as $key => $binding) {
+            list($bindingValue, $bindingId, $used) = $binding->getValues();
+            if ($used) {
+                $this->usedBindings[$bindingId] = true;
+                unset($this->unusedBindings[$bindingId]);
+            } elseif (!isset($this->usedBindings[$bindingId])) {
+                $this->unusedBindings[$bindingId] = array($key, $this->currentId);
+            }
+
+            if (isset($key[0]) && '$' === $key[0]) {
+                continue;
+            }
+
+            if (null !== $bindingValue && !$bindingValue instanceof Reference && !$bindingValue instanceof Definition) {
+                throw new InvalidArgumentException(sprintf('Invalid value for binding key "%s" for service "%s": expected null, an instance of %s or an instance of %s, %s given.', $key, $this->currentId, Reference::class, Definition::class, \gettype($bindingValue)));
+            }
+        }
+
+        if ($value->isAbstract()) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        $calls = $value->getMethodCalls();
+
+        try {
+            if ($constructor = $this->getConstructor($value, false)) {
+                $calls[] = array($constructor, $value->getArguments());
+            }
+        } catch (RuntimeException $e) {
+            $this->errorMessages[] = $e->getMessage();
+            $this->container->getDefinition($this->currentId)->addError($e->getMessage());
+
+            return parent::processValue($value, $isRoot);
+        }
+
+        foreach ($calls as $i => $call) {
+            list($method, $arguments) = $call;
+
+            if ($method instanceof \ReflectionFunctionAbstract) {
+                $reflectionMethod = $method;
+            } else {
+                $reflectionMethod = $this->getReflectionMethod($value, $method);
+            }
+
+            foreach ($reflectionMethod->getParameters() as $key => $parameter) {
+                if (array_key_exists($key, $arguments) && '' !== $arguments[$key]) {
+                    continue;
+                }
+
+                if (array_key_exists('$'.$parameter->name, $bindings)) {
+                    $arguments[$key] = $this->getBindingValue($bindings['$'.$parameter->name]);
+
+                    continue;
+                }
+
+                $typeHint = ProxyHelper::getTypeHint($reflectionMethod, $parameter, true);
+
+                if (!isset($bindings[$typeHint])) {
+                    continue;
+                }
+
+                $arguments[$key] = $this->getBindingValue($bindings[$typeHint]);
+            }
+
+            if ($arguments !== $call[1]) {
+                ksort($arguments);
+                $calls[$i][1] = $arguments;
+            }
+        }
+
+        if ($constructor) {
+            list(, $arguments) = array_pop($calls);
+
+            if ($arguments !== $value->getArguments()) {
+                $value->setArguments($arguments);
+            }
+        }
+
+        if ($calls !== $value->getMethodCalls()) {
+            $value->setMethodCalls($calls);
+        }
+
+        return parent::processValue($value, $isRoot);
+    }
+
+    private function getBindingValue(BoundArgument $binding)
+    {
+        list($bindingValue, $bindingId) = $binding->getValues();
+
+        $this->usedBindings[$bindingId] = true;
+        unset($this->unusedBindings[$bindingId]);
+
+        return $bindingValue;
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveChildDefinitionsPass.php

@@ -0,0 +1,198 @@
+<?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\ChildDefinition;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\ExceptionInterface;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
+
+/**
+ * This replaces all ChildDefinition instances with their equivalent fully
+ * merged Definition instance.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ResolveChildDefinitionsPass extends AbstractRecursivePass
+{
+    private $currentPath;
+
+    protected function processValue($value, $isRoot = false)
+    {
+        if (!$value instanceof Definition) {
+            return parent::processValue($value, $isRoot);
+        }
+        if ($isRoot) {
+            // yes, we are specifically fetching the definition from the
+            // container to ensure we are not operating on stale data
+            $value = $this->container->getDefinition($this->currentId);
+        }
+        if ($value instanceof ChildDefinition) {
+            $this->currentPath = array();
+            $value = $this->resolveDefinition($value);
+            if ($isRoot) {
+                $this->container->setDefinition($this->currentId, $value);
+            }
+        }
+
+        return parent::processValue($value, $isRoot);
+    }
+
+    /**
+     * Resolves the definition.
+     *
+     * @return Definition
+     *
+     * @throws RuntimeException When the definition is invalid
+     */
+    private function resolveDefinition(ChildDefinition $definition)
+    {
+        try {
+            return $this->doResolveDefinition($definition);
+        } catch (ServiceCircularReferenceException $e) {
+            throw $e;
+        } catch (ExceptionInterface $e) {
+            $r = new \ReflectionProperty($e, 'message');
+            $r->setAccessible(true);
+            $r->setValue($e, sprintf('Service "%s": %s', $this->currentId, $e->getMessage()));
+
+            throw $e;
+        }
+    }
+
+    private function doResolveDefinition(ChildDefinition $definition)
+    {
+        if (!$this->container->has($parent = $definition->getParent())) {
+            throw new RuntimeException(sprintf('Parent definition "%s" does not exist.', $parent));
+        }
+
+        $searchKey = array_search($parent, $this->currentPath);
+        $this->currentPath[] = $parent;
+
+        if (false !== $searchKey) {
+            throw new ServiceCircularReferenceException($parent, \array_slice($this->currentPath, $searchKey));
+        }
+
+        $parentDef = $this->container->findDefinition($parent);
+        if ($parentDef instanceof ChildDefinition) {
+            $id = $this->currentId;
+            $this->currentId = $parent;
+            $parentDef = $this->resolveDefinition($parentDef);
+            $this->container->setDefinition($parent, $parentDef);
+            $this->currentId = $id;
+        }
+
+        $this->container->log($this, sprintf('Resolving inheritance for "%s" (parent: %s).', $this->currentId, $parent));
+        $def = new Definition();
+
+        // merge in parent definition
+        // purposely ignored attributes: abstract, shared, tags, autoconfigured
+        $def->setClass($parentDef->getClass());
+        $def->setArguments($parentDef->getArguments());
+        $def->setMethodCalls($parentDef->getMethodCalls());
+        $def->setProperties($parentDef->getProperties());
+        if ($parentDef->getAutowiringTypes(false)) {
+            $def->setAutowiringTypes($parentDef->getAutowiringTypes(false));
+        }
+        if ($parentDef->isDeprecated()) {
+            $def->setDeprecated(true, $parentDef->getDeprecationMessage('%service_id%'));
+        }
+        $def->setFactory($parentDef->getFactory());
+        $def->setConfigurator($parentDef->getConfigurator());
+        $def->setFile($parentDef->getFile());
+        $def->setPublic($parentDef->isPublic());
+        $def->setLazy($parentDef->isLazy());
+        $def->setAutowired($parentDef->isAutowired());
+        $def->setChanges($parentDef->getChanges());
+
+        $def->setBindings($definition->getBindings() + $parentDef->getBindings());
+
+        // overwrite with values specified in the decorator
+        $changes = $definition->getChanges();
+        if (isset($changes['class'])) {
+            $def->setClass($definition->getClass());
+        }
+        if (isset($changes['factory'])) {
+            $def->setFactory($definition->getFactory());
+        }
+        if (isset($changes['configurator'])) {
+            $def->setConfigurator($definition->getConfigurator());
+        }
+        if (isset($changes['file'])) {
+            $def->setFile($definition->getFile());
+        }
+        if (isset($changes['public'])) {
+            $def->setPublic($definition->isPublic());
+        } else {
+            $def->setPrivate($definition->isPrivate() || $parentDef->isPrivate());
+        }
+        if (isset($changes['lazy'])) {
+            $def->setLazy($definition->isLazy());
+        }
+        if (isset($changes['deprecated'])) {
+            $def->setDeprecated($definition->isDeprecated(), $definition->getDeprecationMessage('%service_id%'));
+        }
+        if (isset($changes['autowired'])) {
+            $def->setAutowired($definition->isAutowired());
+        }
+        if (isset($changes['shared'])) {
+            $def->setShared($definition->isShared());
+        }
+        if (isset($changes['decorated_service'])) {
+            $decoratedService = $definition->getDecoratedService();
+            if (null === $decoratedService) {
+                $def->setDecoratedService($decoratedService);
+            } else {
+                $def->setDecoratedService($decoratedService[0], $decoratedService[1], $decoratedService[2]);
+            }
+        }
+
+        // merge arguments
+        foreach ($definition->getArguments() as $k => $v) {
+            if (is_numeric($k)) {
+                $def->addArgument($v);
+            } elseif (0 === strpos($k, 'index_')) {
+                $def->replaceArgument((int) substr($k, \strlen('index_')), $v);
+            } else {
+                $def->setArgument($k, $v);
+            }
+        }
+
+        // merge properties
+        foreach ($definition->getProperties() as $k => $v) {
+            $def->setProperty($k, $v);
+        }
+
+        // append method calls
+        if ($calls = $definition->getMethodCalls()) {
+            $def->setMethodCalls(array_merge($def->getMethodCalls(), $calls));
+        }
+
+        // merge autowiring types
+        foreach ($definition->getAutowiringTypes(false) as $autowiringType) {
+            $def->addAutowiringType($autowiringType);
+        }
+
+        // these attributes are always taken from the child
+        $def->setAbstract($definition->isAbstract());
+        $def->setTags($definition->getTags());
+        // autoconfigure is never taken from parent (on purpose)
+        // and it's not legal on an instanceof
+        $def->setAutoconfigured($definition->isAutoconfigured());
+
+        return $def;
+    }
+}
+
+class_alias(ResolveChildDefinitionsPass::class, ResolveDefinitionTemplatesPass::class);

vendor/symfony/dependency-injection/Compiler/ResolveClassPass.php

@@ -0,0 +1,56 @@
+<?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\ChildDefinition;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ResolveClassPass implements CompilerPassInterface
+{
+    private $changes = array();
+
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->getDefinitions() as $id => $definition) {
+            if ($definition->isSynthetic() || null !== $definition->getClass()) {
+                continue;
+            }
+            if (preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\\\\[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+)++$/', $id)) {
+                if ($definition instanceof ChildDefinition && !class_exists($id)) {
+                    throw new InvalidArgumentException(sprintf('Service definition "%s" has a parent but no class, and its name looks like a FQCN. Either the class is missing or you want to inherit it from the parent service. To resolve this ambiguity, please rename this service to a non-FQCN (e.g. using dots), or create the missing class.', $id));
+                }
+                $this->changes[strtolower($id)] = $id;
+                $definition->setClass($id);
+            }
+        }
+    }
+
+    /**
+     * @internal
+     *
+     * @deprecated since 3.3, to be removed in 4.0.
+     */
+    public function getChanges()
+    {
+        $changes = $this->changes;
+        $this->changes = array();
+
+        return $changes;
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveDefinitionTemplatesPass.php

@@ -0,0 +1,29 @@
+<?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;
+
+@trigger_error('The '.__NAMESPACE__.'\ResolveDefinitionTemplatesPass class is deprecated since Symfony 3.4 and will be removed in 4.0. Use the ResolveChildDefinitionsPass class instead.', E_USER_DEPRECATED);
+
+class_exists(ResolveChildDefinitionsPass::class);
+
+if (false) {
+    /**
+     * This definition decorates another definition.
+     *
+     * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+     *
+     * @deprecated The ResolveDefinitionTemplatesPass class is deprecated since version 3.4 and will be removed in 4.0. Use the ResolveChildDefinitionsPass class instead.
+     */
+    class ResolveDefinitionTemplatesPass extends AbstractRecursivePass
+    {
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveEnvPlaceholdersPass.php

@@ -0,0 +1,44 @@
+<?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\Definition;
+
+/**
+ * Replaces env var placeholders by their current values.
+ */
+class ResolveEnvPlaceholdersPass extends AbstractRecursivePass
+{
+    protected function processValue($value, $isRoot = false)
+    {
+        if (\is_string($value)) {
+            return $this->container->resolveEnvPlaceholders($value, true);
+        }
+        if ($value instanceof Definition) {
+            $changes = $value->getChanges();
+            if (isset($changes['class'])) {
+                $value->setClass($this->container->resolveEnvPlaceholders($value->getClass(), true));
+            }
+            if (isset($changes['file'])) {
+                $value->setFile($this->container->resolveEnvPlaceholders($value->getFile(), true));
+            }
+        }
+
+        $value = parent::processValue($value, $isRoot);
+
+        if ($value && \is_array($value) && !$isRoot) {
+            $value = array_combine($this->container->resolveEnvPlaceholders(array_keys($value), true), $value);
+        }
+
+        return $value;
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveFactoryClassPass.php

@@ -0,0 +1,38 @@
+<?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\Definition;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
+ */
+class ResolveFactoryClassPass extends AbstractRecursivePass
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if ($value instanceof Definition && \is_array($factory = $value->getFactory()) && null === $factory[0]) {
+            if (null === $class = $value->getClass()) {
+                throw new RuntimeException(sprintf('The "%s" service is defined to be created by a factory, but is missing the factory class. Did you forget to define the factory or service class?', $this->currentId));
+            }
+
+            $factory[0] = $class;
+            $value->setFactory($factory);
+        }
+
+        return parent::processValue($value, $isRoot);
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveHotPathPass.php

@@ -0,0 +1,71 @@
+<?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\Argument\ArgumentInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Propagate "container.hot_path" tags to referenced services.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ResolveHotPathPass extends AbstractRecursivePass
+{
+    private $tagName;
+    private $resolvedIds = array();
+
+    public function __construct($tagName = 'container.hot_path')
+    {
+        $this->tagName = $tagName;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        try {
+            parent::process($container);
+            $container->getDefinition('service_container')->clearTag($this->tagName);
+        } finally {
+            $this->resolvedIds = array();
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if ($value instanceof ArgumentInterface) {
+            return $value;
+        }
+        if ($value instanceof Definition && $isRoot && (isset($this->resolvedIds[$this->currentId]) || !$value->hasTag($this->tagName) || $value->isDeprecated())) {
+            return $value->isDeprecated() ? $value->clearTag($this->tagName) : $value;
+        }
+        if ($value instanceof Reference && ContainerBuilder::IGNORE_ON_UNINITIALIZED_REFERENCE !== $value->getInvalidBehavior() && $this->container->has($id = $this->container->normalizeId($value))) {
+            $definition = $this->container->findDefinition($id);
+            if (!$definition->hasTag($this->tagName) && !$definition->isDeprecated()) {
+                $this->resolvedIds[$id] = true;
+                $definition->addTag($this->tagName);
+                parent::processValue($definition, false);
+            }
+
+            return $value;
+        }
+
+        return parent::processValue($value, $isRoot);
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveInstanceofConditionalsPass.php

@@ -0,0 +1,155 @@
+<?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\ChildDefinition;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * Applies instanceof conditionals to definitions.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ResolveInstanceofConditionalsPass implements CompilerPassInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->getAutoconfiguredInstanceof() as $interface => $definition) {
+            if ($definition->getArguments()) {
+                throw new InvalidArgumentException(sprintf('Autoconfigured instanceof for type "%s" defines arguments but these are not supported and should be removed.', $interface));
+            }
+            if ($definition->getMethodCalls()) {
+                throw new InvalidArgumentException(sprintf('Autoconfigured instanceof for type "%s" defines method calls but these are not supported and should be removed.', $interface));
+            }
+        }
+
+        foreach ($container->getDefinitions() as $id => $definition) {
+            if ($definition instanceof ChildDefinition) {
+                // don't apply "instanceof" to children: it will be applied to their parent
+                continue;
+            }
+            $container->setDefinition($id, $this->processDefinition($container, $id, $definition));
+        }
+    }
+
+    private function processDefinition(ContainerBuilder $container, $id, Definition $definition)
+    {
+        $instanceofConditionals = $definition->getInstanceofConditionals();
+        $autoconfiguredInstanceof = $definition->isAutoconfigured() ? $container->getAutoconfiguredInstanceof() : array();
+        if (!$instanceofConditionals && !$autoconfiguredInstanceof) {
+            return $definition;
+        }
+
+        if (!$class = $container->getParameterBag()->resolveValue($definition->getClass())) {
+            return $definition;
+        }
+
+        $conditionals = $this->mergeConditionals($autoconfiguredInstanceof, $instanceofConditionals, $container);
+
+        $definition->setInstanceofConditionals(array());
+        $parent = $shared = null;
+        $instanceofTags = array();
+
+        foreach ($conditionals as $interface => $instanceofDefs) {
+            if ($interface !== $class && (!$container->getReflectionClass($class, false))) {
+                continue;
+            }
+
+            if ($interface !== $class && !is_subclass_of($class, $interface)) {
+                continue;
+            }
+
+            foreach ($instanceofDefs as $key => $instanceofDef) {
+                /** @var ChildDefinition $instanceofDef */
+                $instanceofDef = clone $instanceofDef;
+                $instanceofDef->setAbstract(true)->setParent($parent ?: 'abstract.instanceof.'.$id);
+                $parent = 'instanceof.'.$interface.'.'.$key.'.'.$id;
+                $container->setDefinition($parent, $instanceofDef);
+                $instanceofTags[] = $instanceofDef->getTags();
+                $instanceofDef->setTags(array());
+
+                if (isset($instanceofDef->getChanges()['shared'])) {
+                    $shared = $instanceofDef->isShared();
+                }
+            }
+        }
+
+        if ($parent) {
+            $bindings = $definition->getBindings();
+            $abstract = $container->setDefinition('abstract.instanceof.'.$id, $definition);
+
+            // cast Definition to ChildDefinition
+            $definition->setBindings(array());
+            $definition = serialize($definition);
+            $definition = substr_replace($definition, '53', 2, 2);
+            $definition = substr_replace($definition, 'Child', 44, 0);
+            $definition = unserialize($definition);
+            $definition->setParent($parent);
+
+            if (null !== $shared && !isset($definition->getChanges()['shared'])) {
+                $definition->setShared($shared);
+            }
+
+            $i = \count($instanceofTags);
+            while (0 <= --$i) {
+                foreach ($instanceofTags[$i] as $k => $v) {
+                    foreach ($v as $v) {
+                        if ($definition->hasTag($k) && \in_array($v, $definition->getTag($k))) {
+                            continue;
+                        }
+                        $definition->addTag($k, $v);
+                    }
+                }
+            }
+
+            $definition->setBindings($bindings);
+
+            // reset fields with "merge" behavior
+            $abstract
+                ->setBindings(array())
+                ->setArguments(array())
+                ->setMethodCalls(array())
+                ->setDecoratedService(null)
+                ->setTags(array())
+                ->setAbstract(true);
+        }
+
+        return $definition;
+    }
+
+    private function mergeConditionals(array $autoconfiguredInstanceof, array $instanceofConditionals, ContainerBuilder $container)
+    {
+        // make each value an array of ChildDefinition
+        $conditionals = array_map(function ($childDef) { return array($childDef); }, $autoconfiguredInstanceof);
+
+        foreach ($instanceofConditionals as $interface => $instanceofDef) {
+            // make sure the interface/class exists (but don't validate automaticInstanceofConditionals)
+            if (!$container->getReflectionClass($interface)) {
+                throw new RuntimeException(sprintf('"%s" is set as an "instanceof" conditional, but it does not exist.', $interface));
+            }
+
+            if (!isset($autoconfiguredInstanceof[$interface])) {
+                $conditionals[$interface] = array();
+            }
+
+            $conditionals[$interface][] = $instanceofDef;
+        }
+
+        return $conditionals;
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveInvalidReferencesPass.php

@@ -0,0 +1,111 @@
+<?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\Argument\ArgumentInterface;
+use Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Emulates the invalid behavior if the reference is not found within the
+ * container.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ResolveInvalidReferencesPass implements CompilerPassInterface
+{
+    private $container;
+    private $signalingException;
+
+    /**
+     * Process the ContainerBuilder to resolve invalid references.
+     */
+    public function process(ContainerBuilder $container)
+    {
+        $this->container = $container;
+        $this->signalingException = new RuntimeException('Invalid reference.');
+
+        try {
+            $this->processValue($container->getDefinitions(), 1);
+        } finally {
+            $this->container = $this->signalingException = null;
+        }
+    }
+
+    /**
+     * Processes arguments to determine invalid references.
+     *
+     * @throws RuntimeException When an invalid reference is found
+     */
+    private function processValue($value, $rootLevel = 0, $level = 0)
+    {
+        if ($value instanceof ServiceClosureArgument) {
+            $value->setValues($this->processValue($value->getValues(), 1, 1));
+        } elseif ($value instanceof ArgumentInterface) {
+            $value->setValues($this->processValue($value->getValues(), $rootLevel, 1 + $level));
+        } elseif ($value instanceof Definition) {
+            if ($value->isSynthetic() || $value->isAbstract()) {
+                return $value;
+            }
+            $value->setArguments($this->processValue($value->getArguments(), 0));
+            $value->setProperties($this->processValue($value->getProperties(), 1));
+            $value->setMethodCalls($this->processValue($value->getMethodCalls(), 2));
+        } elseif (\is_array($value)) {
+            $i = 0;
+
+            foreach ($value as $k => $v) {
+                try {
+                    if (false !== $i && $k !== $i++) {
+                        $i = false;
+                    }
+                    if ($v !== $processedValue = $this->processValue($v, $rootLevel, 1 + $level)) {
+                        $value[$k] = $processedValue;
+                    }
+                } catch (RuntimeException $e) {
+                    if ($rootLevel < $level || ($rootLevel && !$level)) {
+                        unset($value[$k]);
+                    } elseif ($rootLevel) {
+                        throw $e;
+                    } else {
+                        $value[$k] = null;
+                    }
+                }
+            }
+
+            // Ensure numerically indexed arguments have sequential numeric keys.
+            if (false !== $i) {
+                $value = array_values($value);
+            }
+        } elseif ($value instanceof Reference) {
+            if ($this->container->has($value)) {
+                return $value;
+            }
+            $invalidBehavior = $value->getInvalidBehavior();
+
+            // resolve invalid behavior
+            if (ContainerInterface::NULL_ON_INVALID_REFERENCE === $invalidBehavior) {
+                $value = null;
+            } elseif (ContainerInterface::IGNORE_ON_INVALID_REFERENCE === $invalidBehavior) {
+                if (0 < $level || $rootLevel) {
+                    throw $this->signalingException;
+                }
+                $value = null;
+            }
+        }
+
+        return $value;
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveNamedArgumentsPass.php

@@ -0,0 +1,101 @@
+<?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\Definition;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\LazyProxy\ProxyHelper;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Resolves named arguments to their corresponding numeric index.
+ *
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ */
+class ResolveNamedArgumentsPass extends AbstractRecursivePass
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if (!$value instanceof Definition) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        $calls = $value->getMethodCalls();
+        $calls[] = array('__construct', $value->getArguments());
+
+        foreach ($calls as $i => $call) {
+            list($method, $arguments) = $call;
+            $parameters = null;
+            $resolvedArguments = array();
+
+            foreach ($arguments as $key => $argument) {
+                if (\is_int($key)) {
+                    $resolvedArguments[$key] = $argument;
+                    continue;
+                }
+
+                if (null === $parameters) {
+                    $r = $this->getReflectionMethod($value, $method);
+                    $class = $r instanceof \ReflectionMethod ? $r->class : $this->currentId;
+                    $parameters = $r->getParameters();
+                }
+
+                if (isset($key[0]) && '$' === $key[0]) {
+                    foreach ($parameters as $j => $p) {
+                        if ($key === '$'.$p->name) {
+                            $resolvedArguments[$j] = $argument;
+
+                            continue 2;
+                        }
+                    }
+
+                    throw new InvalidArgumentException(sprintf('Invalid service "%s": method "%s()" has no argument named "%s". Check your service definition.', $this->currentId, $class !== $this->currentId ? $class.'::'.$method : $method, $key));
+                }
+
+                if (null !== $argument && !$argument instanceof Reference && !$argument instanceof Definition) {
+                    throw new InvalidArgumentException(sprintf('Invalid service "%s": the value of argument "%s" of method "%s()" must be null, an instance of %s or an instance of %s, %s given.', $this->currentId, $key, $class !== $this->currentId ? $class.'::'.$method : $method, Reference::class, Definition::class, \gettype($argument)));
+                }
+
+                $typeFound = false;
+                foreach ($parameters as $j => $p) {
+                    if (!array_key_exists($j, $resolvedArguments) && ProxyHelper::getTypeHint($r, $p, true) === $key) {
+                        $resolvedArguments[$j] = $argument;
+                        $typeFound = true;
+                    }
+                }
+
+                if (!$typeFound) {
+                    throw new InvalidArgumentException(sprintf('Invalid service "%s": method "%s()" has no argument type-hinted as "%s". Check your service definition.', $this->currentId, $class !== $this->currentId ? $class.'::'.$method : $method, $key));
+                }
+            }
+
+            if ($resolvedArguments !== $call[1]) {
+                ksort($resolvedArguments);
+                $calls[$i][1] = $resolvedArguments;
+            }
+        }
+
+        list(, $arguments) = array_pop($calls);
+
+        if ($arguments !== $value->getArguments()) {
+            $value->setArguments($arguments);
+        }
+        if ($calls !== $value->getMethodCalls()) {
+            $value->setMethodCalls($calls);
+        }
+
+        return parent::processValue($value, $isRoot);
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveParameterPlaceHoldersPass.php

@@ -0,0 +1,87 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+
+/**
+ * Resolves all parameter placeholders "%somevalue%" to their real values.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ResolveParameterPlaceHoldersPass extends AbstractRecursivePass
+{
+    private $bag;
+    private $resolveArrays;
+
+    public function __construct($resolveArrays = true)
+    {
+        $this->resolveArrays = $resolveArrays;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @throws ParameterNotFoundException
+     */
+    public function process(ContainerBuilder $container)
+    {
+        $this->bag = $container->getParameterBag();
+
+        try {
+            parent::process($container);
+
+            $aliases = array();
+            foreach ($container->getAliases() as $name => $target) {
+                $this->currentId = $name;
+                $aliases[$this->bag->resolveValue($name)] = $target;
+            }
+            $container->setAliases($aliases);
+        } catch (ParameterNotFoundException $e) {
+            $e->setSourceId($this->currentId);
+
+            throw $e;
+        }
+
+        $this->bag->resolve();
+        $this->bag = null;
+    }
+
+    protected function processValue($value, $isRoot = false)
+    {
+        if (\is_string($value)) {
+            $v = $this->bag->resolveValue($value);
+
+            return $this->resolveArrays || !$v || !\is_array($v) ? $v : $value;
+        }
+        if ($value instanceof Definition) {
+            $value->setBindings($this->processValue($value->getBindings()));
+            $changes = $value->getChanges();
+            if (isset($changes['class'])) {
+                $value->setClass($this->bag->resolveValue($value->getClass()));
+            }
+            if (isset($changes['file'])) {
+                $value->setFile($this->bag->resolveValue($value->getFile()));
+            }
+        }
+
+        $value = parent::processValue($value, $isRoot);
+
+        if ($value && \is_array($value)) {
+            $value = array_combine($this->bag->resolveValue(array_keys($value)), $value);
+        }
+
+        return $value;
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolvePrivatesPass.php

@@ -0,0 +1,40 @@
+<?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\ContainerBuilder;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ResolvePrivatesPass implements CompilerPassInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->getDefinitions() as $id => $definition) {
+            if ($definition->isPrivate()) {
+                $definition->setPublic(false);
+                $definition->setPrivate(true);
+            }
+        }
+
+        foreach ($container->getAliases() as $id => $alias) {
+            if ($alias->isPrivate()) {
+                $alias->setPublic(false);
+                $alias->setPrivate(true);
+            }
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveReferencesToAliasesPass.php

@@ -0,0 +1,77 @@
+<?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\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Replaces all references to aliases with references to the actual service.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ResolveReferencesToAliasesPass extends AbstractRecursivePass
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function process(ContainerBuilder $container)
+    {
+        parent::process($container);
+
+        foreach ($container->getAliases() as $id => $alias) {
+            $aliasId = $container->normalizeId($alias);
+            if ($aliasId !== $defId = $this->getDefinitionId($aliasId, $container)) {
+                $container->setAlias($id, $defId)->setPublic($alias->isPublic())->setPrivate($alias->isPrivate());
+            }
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if ($value instanceof Reference) {
+            $defId = $this->getDefinitionId($id = $this->container->normalizeId($value), $this->container);
+
+            if ($defId !== $id) {
+                return new Reference($defId, $value->getInvalidBehavior());
+            }
+        }
+
+        return parent::processValue($value);
+    }
+
+    /**
+     * Resolves an alias into a definition id.
+     *
+     * @param string           $id        The definition or alias id to resolve
+     * @param ContainerBuilder $container
+     *
+     * @return string The definition id with aliases resolved
+     */
+    private function getDefinitionId($id, ContainerBuilder $container)
+    {
+        $seen = array();
+        while ($container->hasAlias($id)) {
+            if (isset($seen[$id])) {
+                throw new ServiceCircularReferenceException($id, array_merge(array_keys($seen), array($id)));
+            }
+            $seen[$id] = true;
+            $id = $container->normalizeId($container->getAlias($id));
+        }
+
+        return $id;
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveServiceSubscribersPass.php

@@ -0,0 +1,51 @@
+<?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 Psr\Container\ContainerInterface;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Compiler pass to inject their service locator to service subscribers.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ResolveServiceSubscribersPass extends AbstractRecursivePass
+{
+    private $serviceLocator;
+
+    protected function processValue($value, $isRoot = false)
+    {
+        if ($value instanceof Reference && $this->serviceLocator && ContainerInterface::class === $this->container->normalizeId($value)) {
+            return new Reference($this->serviceLocator);
+        }
+
+        if (!$value instanceof Definition) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        $serviceLocator = $this->serviceLocator;
+        $this->serviceLocator = null;
+
+        if ($value->hasTag('container.service_subscriber.locator')) {
+            $this->serviceLocator = $value->getTag('container.service_subscriber.locator')[0]['id'];
+            $value->clearTag('container.service_subscriber.locator');
+        }
+
+        try {
+            return parent::processValue($value);
+        } finally {
+            $this->serviceLocator = $serviceLocator;
+        }
+    }
+}

vendor/symfony/dependency-injection/Compiler/ResolveTaggedIteratorArgumentPass.php

@@ -0,0 +1,38 @@
+<?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\Argument\TaggedIteratorArgument;
+
+/**
+ * Resolves all TaggedIteratorArgument arguments.
+ *
+ * @author Roland Franssen <franssen.roland@gmail.com>
+ */
+class ResolveTaggedIteratorArgumentPass extends AbstractRecursivePass
+{
+    use PriorityTaggedServiceTrait;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if (!$value instanceof TaggedIteratorArgument) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        $value->setValues($this->findAndSortTaggedServices($value->getTag(), $this->container));
+
+        return $value;
+    }
+}

vendor/symfony/dependency-injection/Compiler/ServiceLocatorTagPass.php

@@ -0,0 +1,112 @@
+<?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\Argument\ServiceClosureArgument;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\ServiceLocator;
+
+/**
+ * Applies the "container.service_locator" tag by wrapping references into ServiceClosureArgument instances.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+final class ServiceLocatorTagPass extends AbstractRecursivePass
+{
+    protected function processValue($value, $isRoot = false)
+    {
+        if (!$value instanceof Definition || !$value->hasTag('container.service_locator')) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        if (!$value->getClass()) {
+            $value->setClass(ServiceLocator::class);
+        }
+
+        $arguments = $value->getArguments();
+        if (!isset($arguments[0]) || !\is_array($arguments[0])) {
+            throw new InvalidArgumentException(sprintf('Invalid definition for service "%s": an array of references is expected as first argument when the "container.service_locator" tag is set.', $this->currentId));
+        }
+
+        foreach ($arguments[0] as $k => $v) {
+            if ($v instanceof ServiceClosureArgument) {
+                continue;
+            }
+            if (!$v instanceof Reference) {
+                throw new InvalidArgumentException(sprintf('Invalid definition for service "%s": an array of references is expected as first argument when the "container.service_locator" tag is set, "%s" found for key "%s".', $this->currentId, \is_object($v) ? \get_class($v) : \gettype($v), $k));
+            }
+            $arguments[0][$k] = new ServiceClosureArgument($v);
+        }
+        ksort($arguments[0]);
+
+        $value->setArguments($arguments);
+
+        $id = 'service_locator.'.ContainerBuilder::hash($value);
+
+        if ($isRoot) {
+            if ($id !== $this->currentId) {
+                $this->container->setAlias($id, new Alias($this->currentId, false));
+            }
+
+            return $value;
+        }
+
+        $this->container->setDefinition($id, $value->setPublic(false));
+
+        return new Reference($id);
+    }
+
+    /**
+     * @param ContainerBuilder $container
+     * @param Reference[]      $refMap
+     * @param string|null      $callerId
+     *
+     * @return Reference
+     */
+    public static function register(ContainerBuilder $container, array $refMap, $callerId = null)
+    {
+        foreach ($refMap as $id => $ref) {
+            if (!$ref instanceof Reference) {
+                throw new InvalidArgumentException(sprintf('Invalid service locator definition: only services can be referenced, "%s" found for key "%s". Inject parameter values using constructors instead.', \is_object($ref) ? \get_class($ref) : \gettype($ref), $id));
+            }
+            $refMap[$id] = new ServiceClosureArgument($ref);
+        }
+        ksort($refMap);
+
+        $locator = (new Definition(ServiceLocator::class))
+            ->addArgument($refMap)
+            ->setPublic(false)
+            ->addTag('container.service_locator');
+
+        if (!$container->has($id = 'service_locator.'.ContainerBuilder::hash($locator))) {
+            $container->setDefinition($id, $locator);
+        }
+
+        if (null !== $callerId) {
+            $locatorId = $id;
+            // Locators are shared when they hold the exact same list of factories;
+            // to have them specialized per consumer service, we use a cloning factory
+            // to derivate customized instances from the prototype one.
+            $container->register($id .= '.'.$callerId, ServiceLocator::class)
+                ->setPublic(false)
+                ->setFactory(array(new Reference($locatorId), 'withContext'))
+                ->addArgument($callerId)
+                ->addArgument(new Reference('service_container'));
+        }
+
+        return new Reference($id);
+    }
+}

vendor/symfony/dependency-injection/Compiler/ServiceReferenceGraph.php

@@ -0,0 +1,128 @@
+<?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\Exception\InvalidArgumentException;
+
+/**
+ * This is a directed graph of your services.
+ *
+ * This information can be used by your compiler passes instead of collecting
+ * it themselves which improves performance quite a lot.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ *
+ * @final since version 3.4
+ */
+class ServiceReferenceGraph
+{
+    /**
+     * @var ServiceReferenceGraphNode[]
+     */
+    private $nodes = array();
+
+    /**
+     * Checks if the graph has a specific node.
+     *
+     * @param string $id Id to check
+     *
+     * @return bool
+     */
+    public function hasNode($id)
+    {
+        return isset($this->nodes[$id]);
+    }
+
+    /**
+     * Gets a node by identifier.
+     *
+     * @param string $id The id to retrieve
+     *
+     * @return ServiceReferenceGraphNode
+     *
+     * @throws InvalidArgumentException if no node matches the supplied identifier
+     */
+    public function getNode($id)
+    {
+        if (!isset($this->nodes[$id])) {
+            throw new InvalidArgumentException(sprintf('There is no node with id "%s".', $id));
+        }
+
+        return $this->nodes[$id];
+    }
+
+    /**
+     * Returns all nodes.
+     *
+     * @return ServiceReferenceGraphNode[]
+     */
+    public function getNodes()
+    {
+        return $this->nodes;
+    }
+
+    /**
+     * Clears all nodes.
+     */
+    public function clear()
+    {
+        foreach ($this->nodes as $node) {
+            $node->clear();
+        }
+        $this->nodes = array();
+    }
+
+    /**
+     * Connects 2 nodes together in the Graph.
+     *
+     * @param string $sourceId
+     * @param mixed  $sourceValue
+     * @param string $destId
+     * @param mixed  $destValue
+     * @param string $reference
+     * @param bool   $lazy
+     * @param bool   $weak
+     */
+    public function connect($sourceId, $sourceValue, $destId, $destValue = null, $reference = null/*, bool $lazy = false, bool $weak = false*/)
+    {
+        $lazy = \func_num_args() >= 6 ? func_get_arg(5) : false;
+        $weak = \func_num_args() >= 7 ? func_get_arg(6) : false;
+
+        if (null === $sourceId || null === $destId) {
+            return;
+        }
+
+        $sourceNode = $this->createNode($sourceId, $sourceValue);
+        $destNode = $this->createNode($destId, $destValue);
+        $edge = new ServiceReferenceGraphEdge($sourceNode, $destNode, $reference, $lazy, $weak);
+
+        $sourceNode->addOutEdge($edge);
+        $destNode->addInEdge($edge);
+    }
+
+    /**
+     * Creates a graph node.
+     *
+     * @param string $id
+     * @param mixed  $value
+     *
+     * @return ServiceReferenceGraphNode
+     */
+    private function createNode($id, $value)
+    {
+        if (isset($this->nodes[$id]) && $this->nodes[$id]->getValue() === $value) {
+            return $this->nodes[$id];
+        }
+
+        return $this->nodes[$id] = new ServiceReferenceGraphNode($id, $value);
+    }
+}

vendor/symfony/dependency-injection/Compiler/ServiceReferenceGraphEdge.php

@@ -0,0 +1,94 @@
+<?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;
+
+/**
+ * Represents an edge in your service graph.
+ *
+ * Value is typically a reference.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ServiceReferenceGraphEdge
+{
+    private $sourceNode;
+    private $destNode;
+    private $value;
+    private $lazy;
+    private $weak;
+
+    /**
+     * @param ServiceReferenceGraphNode $sourceNode
+     * @param ServiceReferenceGraphNode $destNode
+     * @param mixed                     $value
+     * @param bool                      $lazy
+     * @param bool                      $weak
+     */
+    public function __construct(ServiceReferenceGraphNode $sourceNode, ServiceReferenceGraphNode $destNode, $value = null, $lazy = false, $weak = false)
+    {
+        $this->sourceNode = $sourceNode;
+        $this->destNode = $destNode;
+        $this->value = $value;
+        $this->lazy = $lazy;
+        $this->weak = $weak;
+    }
+
+    /**
+     * Returns the value of the edge.
+     *
+     * @return string
+     */
+    public function getValue()
+    {
+        return $this->value;
+    }
+
+    /**
+     * Returns the source node.
+     *
+     * @return ServiceReferenceGraphNode
+     */
+    public function getSourceNode()
+    {
+        return $this->sourceNode;
+    }
+
+    /**
+     * Returns the destination node.
+     *
+     * @return ServiceReferenceGraphNode
+     */
+    public function getDestNode()
+    {
+        return $this->destNode;
+    }
+
+    /**
+     * Returns true if the edge is lazy, meaning it's a dependency not requiring direct instantiation.
+     *
+     * @return bool
+     */
+    public function isLazy()
+    {
+        return $this->lazy;
+    }
+
+    /**
+     * Returns true if the edge is weak, meaning it shouldn't prevent removing the target service.
+     *
+     * @return bool
+     */
+    public function isWeak()
+    {
+        return $this->weak;
+    }
+}

vendor/symfony/dependency-injection/Compiler/ServiceReferenceGraphNode.php

@@ -0,0 +1,118 @@
+<?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\Definition;
+
+/**
+ * Represents a node in your service graph.
+ *
+ * Value is typically a definition, or an alias.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ServiceReferenceGraphNode
+{
+    private $id;
+    private $inEdges = array();
+    private $outEdges = array();
+    private $value;
+
+    /**
+     * @param string $id    The node identifier
+     * @param mixed  $value The node value
+     */
+    public function __construct($id, $value)
+    {
+        $this->id = $id;
+        $this->value = $value;
+    }
+
+    public function addInEdge(ServiceReferenceGraphEdge $edge)
+    {
+        $this->inEdges[] = $edge;
+    }
+
+    public function addOutEdge(ServiceReferenceGraphEdge $edge)
+    {
+        $this->outEdges[] = $edge;
+    }
+
+    /**
+     * Checks if the value of this node is an Alias.
+     *
+     * @return bool True if the value is an Alias instance
+     */
+    public function isAlias()
+    {
+        return $this->value instanceof Alias;
+    }
+
+    /**
+     * Checks if the value of this node is a Definition.
+     *
+     * @return bool True if the value is a Definition instance
+     */
+    public function isDefinition()
+    {
+        return $this->value instanceof Definition;
+    }
+
+    /**
+     * Returns the identifier.
+     *
+     * @return string
+     */
+    public function getId()
+    {
+        return $this->id;
+    }
+
+    /**
+     * Returns the in edges.
+     *
+     * @return array The in ServiceReferenceGraphEdge array
+     */
+    public function getInEdges()
+    {
+        return $this->inEdges;
+    }
+
+    /**
+     * Returns the out edges.
+     *
+     * @return array The out ServiceReferenceGraphEdge array
+     */
+    public function getOutEdges()
+    {
+        return $this->outEdges;
+    }
+
+    /**
+     * Returns the value of this Node.
+     *
+     * @return mixed The value
+     */
+    public function getValue()
+    {
+        return $this->value;
+    }
+
+    /**
+     * Clears all edges.
+     */
+    public function clear()
+    {
+        $this->inEdges = $this->outEdges = array();
+    }
+}

vendor/symfony/dependency-injection/Config/AutowireServiceResource.php

@@ -0,0 +1,82 @@
+<?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\Config;
+
+@trigger_error('The '.__NAMESPACE__.'\AutowireServiceResource class is deprecated since Symfony 3.3 and will be removed in 4.0. Use ContainerBuilder::getReflectionClass() instead.', E_USER_DEPRECATED);
+
+use Symfony\Component\Config\Resource\SelfCheckingResourceInterface;
+use Symfony\Component\DependencyInjection\Compiler\AutowirePass;
+
+/**
+ * @deprecated since version 3.3, to be removed in 4.0. Use ContainerBuilder::getReflectionClass() instead.
+ */
+class AutowireServiceResource implements SelfCheckingResourceInterface, \Serializable
+{
+    private $class;
+    private $filePath;
+    private $autowiringMetadata = array();
+
+    public function __construct($class, $path, array $autowiringMetadata)
+    {
+        $this->class = $class;
+        $this->filePath = $path;
+        $this->autowiringMetadata = $autowiringMetadata;
+    }
+
+    public function isFresh($timestamp)
+    {
+        if (!file_exists($this->filePath)) {
+            return false;
+        }
+
+        // has the file *not* been modified? Definitely fresh
+        if (@filemtime($this->filePath) <= $timestamp) {
+            return true;
+        }
+
+        try {
+            $reflectionClass = new \ReflectionClass($this->class);
+        } catch (\ReflectionException $e) {
+            // the class does not exist anymore!
+            return false;
+        }
+
+        return (array) $this === (array) AutowirePass::createResourceForClass($reflectionClass);
+    }
+
+    public function __toString()
+    {
+        return 'service.autowire.'.$this->class;
+    }
+
+    public function serialize()
+    {
+        return serialize(array($this->class, $this->filePath, $this->autowiringMetadata));
+    }
+
+    public function unserialize($serialized)
+    {
+        if (\PHP_VERSION_ID >= 70000) {
+            list($this->class, $this->filePath, $this->autowiringMetadata) = unserialize($serialized, array('allowed_classes' => false));
+        } else {
+            list($this->class, $this->filePath, $this->autowiringMetadata) = unserialize($serialized);
+        }
+    }
+
+    /**
+     * @deprecated Implemented for compatibility with Symfony 2.8
+     */
+    public function getResource()
+    {
+        return $this->filePath;
+    }
+}

vendor/symfony/dependency-injection/Config/ContainerParametersResource.php

@@ -0,0 +1,64 @@
+<?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\Config;
+
+use Symfony\Component\Config\Resource\ResourceInterface;
+
+/**
+ * Tracks container parameters.
+ *
+ * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
+ */
+class ContainerParametersResource implements ResourceInterface, \Serializable
+{
+    private $parameters;
+
+    /**
+     * @param array $parameters The container parameters to track
+     */
+    public function __construct(array $parameters)
+    {
+        $this->parameters = $parameters;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __toString()
+    {
+        return 'container_parameters_'.md5(serialize($this->parameters));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function serialize()
+    {
+        return serialize($this->parameters);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function unserialize($serialized)
+    {
+        $this->parameters = unserialize($serialized);
+    }
+
+    /**
+     * @return array Tracked parameters
+     */
+    public function getParameters()
+    {
+        return $this->parameters;
+    }
+}

vendor/symfony/dependency-injection/Config/ContainerParametersResourceChecker.php

@@ -0,0 +1,52 @@
+<?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\Config;
+
+use Symfony\Component\Config\Resource\ResourceInterface;
+use Symfony\Component\Config\ResourceCheckerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
+ */
+class ContainerParametersResourceChecker implements ResourceCheckerInterface
+{
+    /** @var ContainerInterface */
+    private $container;
+
+    public function __construct(ContainerInterface $container)
+    {
+        $this->container = $container;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function supports(ResourceInterface $metadata)
+    {
+        return $metadata instanceof ContainerParametersResource;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh(ResourceInterface $resource, $timestamp)
+    {
+        foreach ($resource->getParameters() as $key => $value) {
+            if (!$this->container->hasParameter($key) || $this->container->getParameter($key) !== $value) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+}

vendor/symfony/dependency-injection/Container.php

@@ -0,0 +1,528 @@
+<?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;
+
+use Symfony\Component\DependencyInjection\Exception\EnvNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\ParameterCircularReferenceException;
+use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
+use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
+use Symfony\Component\DependencyInjection\ParameterBag\EnvPlaceholderParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+
+/**
+ * Container is a dependency injection container.
+ *
+ * It gives access to object instances (services).
+ * Services and parameters are simple key/pair stores.
+ * The container can have four possible behaviors when a service
+ * does not exist (or is not initialized for the last case):
+ *
+ *  * EXCEPTION_ON_INVALID_REFERENCE: Throws an exception (the default)
+ *  * NULL_ON_INVALID_REFERENCE:      Returns null
+ *  * IGNORE_ON_INVALID_REFERENCE:    Ignores the wrapping command asking for the reference
+ *                                    (for instance, ignore a setter if the service does not exist)
+ *  * IGNORE_ON_UNINITIALIZED_REFERENCE: Ignores/returns null for uninitialized services or invalid references
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class Container implements ResettableContainerInterface
+{
+    protected $parameterBag;
+    protected $services = array();
+    protected $fileMap = array();
+    protected $methodMap = array();
+    protected $aliases = array();
+    protected $loading = array();
+    protected $resolving = array();
+    protected $syntheticIds = array();
+
+    /**
+     * @internal
+     */
+    protected $privates = array();
+
+    /**
+     * @internal
+     */
+    protected $normalizedIds = array();
+
+    private $underscoreMap = array('_' => '', '.' => '_', '\\' => '_');
+    private $envCache = array();
+    private $compiled = false;
+    private $getEnv;
+
+    public function __construct(ParameterBagInterface $parameterBag = null)
+    {
+        $this->parameterBag = $parameterBag ?: new EnvPlaceholderParameterBag();
+    }
+
+    /**
+     * Compiles the container.
+     *
+     * This method does two things:
+     *
+     *  * Parameter values are resolved;
+     *  * The parameter bag is frozen.
+     */
+    public function compile()
+    {
+        $this->parameterBag->resolve();
+
+        $this->parameterBag = new FrozenParameterBag($this->parameterBag->all());
+
+        $this->compiled = true;
+    }
+
+    /**
+     * Returns true if the container is compiled.
+     *
+     * @return bool
+     */
+    public function isCompiled()
+    {
+        return $this->compiled;
+    }
+
+    /**
+     * Returns true if the container parameter bag are frozen.
+     *
+     * @deprecated since version 3.3, to be removed in 4.0.
+     *
+     * @return bool true if the container parameter bag are frozen, false otherwise
+     */
+    public function isFrozen()
+    {
+        @trigger_error(sprintf('The %s() method is deprecated since Symfony 3.3 and will be removed in 4.0. Use the isCompiled() method instead.', __METHOD__), E_USER_DEPRECATED);
+
+        return $this->parameterBag instanceof FrozenParameterBag;
+    }
+
+    /**
+     * Gets the service container parameter bag.
+     *
+     * @return ParameterBagInterface A ParameterBagInterface instance
+     */
+    public function getParameterBag()
+    {
+        return $this->parameterBag;
+    }
+
+    /**
+     * Gets a parameter.
+     *
+     * @param string $name The parameter name
+     *
+     * @return mixed The parameter value
+     *
+     * @throws InvalidArgumentException if the parameter is not defined
+     */
+    public function getParameter($name)
+    {
+        return $this->parameterBag->get($name);
+    }
+
+    /**
+     * Checks if a parameter exists.
+     *
+     * @param string $name The parameter name
+     *
+     * @return bool The presence of parameter in container
+     */
+    public function hasParameter($name)
+    {
+        return $this->parameterBag->has($name);
+    }
+
+    /**
+     * Sets a parameter.
+     *
+     * @param string $name  The parameter name
+     * @param mixed  $value The parameter value
+     */
+    public function setParameter($name, $value)
+    {
+        $this->parameterBag->set($name, $value);
+    }
+
+    /**
+     * Sets a service.
+     *
+     * Setting a service to null resets the service: has() returns false and get()
+     * behaves in the same way as if the service was never created.
+     *
+     * @param string $id      The service identifier
+     * @param object $service The service instance
+     */
+    public function set($id, $service)
+    {
+        // Runs the internal initializer; used by the dumped container to include always-needed files
+        if (isset($this->privates['service_container']) && $this->privates['service_container'] instanceof \Closure) {
+            $initialize = $this->privates['service_container'];
+            unset($this->privates['service_container']);
+            $initialize();
+        }
+
+        $id = $this->normalizeId($id);
+
+        if ('service_container' === $id) {
+            throw new InvalidArgumentException('You cannot set service "service_container".');
+        }
+
+        if (isset($this->privates[$id]) || !(isset($this->fileMap[$id]) || isset($this->methodMap[$id]))) {
+            if (!isset($this->privates[$id]) && !isset($this->getRemovedIds()[$id])) {
+                // no-op
+            } elseif (null === $service) {
+                @trigger_error(sprintf('The "%s" service is private, unsetting it is deprecated since Symfony 3.2 and will fail in 4.0.', $id), E_USER_DEPRECATED);
+                unset($this->privates[$id]);
+            } else {
+                @trigger_error(sprintf('The "%s" service is private, replacing it is deprecated since Symfony 3.2 and will fail in 4.0.', $id), E_USER_DEPRECATED);
+            }
+        } elseif (isset($this->services[$id])) {
+            if (null === $service) {
+                @trigger_error(sprintf('The "%s" service is already initialized, unsetting it is deprecated since Symfony 3.3 and will fail in 4.0.', $id), E_USER_DEPRECATED);
+            } else {
+                @trigger_error(sprintf('The "%s" service is already initialized, replacing it is deprecated since Symfony 3.3 and will fail in 4.0.', $id), E_USER_DEPRECATED);
+            }
+        }
+
+        if (isset($this->aliases[$id])) {
+            unset($this->aliases[$id]);
+        }
+
+        if (null === $service) {
+            unset($this->services[$id]);
+
+            return;
+        }
+
+        $this->services[$id] = $service;
+    }
+
+    /**
+     * Returns true if the given service is defined.
+     *
+     * @param string $id The service identifier
+     *
+     * @return bool true if the service is defined, false otherwise
+     */
+    public function has($id)
+    {
+        for ($i = 2;;) {
+            if (isset($this->privates[$id])) {
+                @trigger_error(sprintf('The "%s" service is private, checking for its existence is deprecated since Symfony 3.2 and will fail in 4.0.', $id), E_USER_DEPRECATED);
+            }
+            if (isset($this->aliases[$id])) {
+                $id = $this->aliases[$id];
+            }
+            if (isset($this->services[$id])) {
+                return true;
+            }
+            if ('service_container' === $id) {
+                return true;
+            }
+
+            if (isset($this->fileMap[$id]) || isset($this->methodMap[$id])) {
+                return true;
+            }
+
+            if (--$i && $id !== $normalizedId = $this->normalizeId($id)) {
+                $id = $normalizedId;
+                continue;
+            }
+
+            // We only check the convention-based factory in a compiled container (i.e. a child class other than a ContainerBuilder,
+            // and only when the dumper has not generated the method map (otherwise the method map is considered to be fully populated by the dumper)
+            if (!$this->methodMap && !$this instanceof ContainerBuilder && __CLASS__ !== static::class && method_exists($this, 'get'.strtr($id, $this->underscoreMap).'Service')) {
+                @trigger_error('Generating a dumped container without populating the method map is deprecated since Symfony 3.2 and will be unsupported in 4.0. Update your dumper to generate the method map.', E_USER_DEPRECATED);
+
+                return true;
+            }
+
+            return false;
+        }
+    }
+
+    /**
+     * Gets a service.
+     *
+     * If a service is defined both through a set() method and
+     * with a get{$id}Service() method, the former has always precedence.
+     *
+     * @param string $id              The service identifier
+     * @param int    $invalidBehavior The behavior when the service does not exist
+     *
+     * @return object The associated service
+     *
+     * @throws ServiceCircularReferenceException When a circular reference is detected
+     * @throws ServiceNotFoundException          When the service is not defined
+     * @throws \Exception                        if an exception has been thrown when the service has been resolved
+     *
+     * @see Reference
+     */
+    public function get($id, $invalidBehavior = /* self::EXCEPTION_ON_INVALID_REFERENCE */ 1)
+    {
+        // Attempt to retrieve the service by checking first aliases then
+        // available services. Service IDs are case insensitive, however since
+        // this method can be called thousands of times during a request, avoid
+        // calling $this->normalizeId($id) unless necessary.
+        for ($i = 2;;) {
+            if (isset($this->privates[$id])) {
+                @trigger_error(sprintf('The "%s" service is private, getting it from the container is deprecated since Symfony 3.2 and will fail in 4.0. You should either make the service public, or stop using the container directly and use dependency injection instead.', $id), E_USER_DEPRECATED);
+            }
+            if (isset($this->aliases[$id])) {
+                $id = $this->aliases[$id];
+            }
+
+            // Re-use shared service instance if it exists.
+            if (isset($this->services[$id])) {
+                return $this->services[$id];
+            }
+            if ('service_container' === $id) {
+                return $this;
+            }
+
+            if (isset($this->loading[$id])) {
+                throw new ServiceCircularReferenceException($id, array_merge(array_keys($this->loading), array($id)));
+            }
+
+            $this->loading[$id] = true;
+
+            try {
+                if (isset($this->fileMap[$id])) {
+                    return /* self::IGNORE_ON_UNINITIALIZED_REFERENCE */ 4 === $invalidBehavior ? null : $this->load($this->fileMap[$id]);
+                } elseif (isset($this->methodMap[$id])) {
+                    return /* self::IGNORE_ON_UNINITIALIZED_REFERENCE */ 4 === $invalidBehavior ? null : $this->{$this->methodMap[$id]}();
+                } elseif (--$i && $id !== $normalizedId = $this->normalizeId($id)) {
+                    unset($this->loading[$id]);
+                    $id = $normalizedId;
+                    continue;
+                } elseif (!$this->methodMap && !$this instanceof ContainerBuilder && __CLASS__ !== static::class && method_exists($this, $method = 'get'.strtr($id, $this->underscoreMap).'Service')) {
+                    // We only check the convention-based factory in a compiled container (i.e. a child class other than a ContainerBuilder,
+                    // and only when the dumper has not generated the method map (otherwise the method map is considered to be fully populated by the dumper)
+                    @trigger_error('Generating a dumped container without populating the method map is deprecated since Symfony 3.2 and will be unsupported in 4.0. Update your dumper to generate the method map.', E_USER_DEPRECATED);
+
+                    return /* self::IGNORE_ON_UNINITIALIZED_REFERENCE */ 4 === $invalidBehavior ? null : $this->{$method}();
+                }
+
+                break;
+            } catch (\Exception $e) {
+                unset($this->services[$id]);
+
+                throw $e;
+            } finally {
+                unset($this->loading[$id]);
+            }
+        }
+
+        if (/* self::EXCEPTION_ON_INVALID_REFERENCE */ 1 === $invalidBehavior) {
+            if (!$id) {
+                throw new ServiceNotFoundException($id);
+            }
+            if (isset($this->syntheticIds[$id])) {
+                throw new ServiceNotFoundException($id, null, null, array(), sprintf('The "%s" service is synthetic, it needs to be set at boot time before it can be used.', $id));
+            }
+            if (isset($this->getRemovedIds()[$id])) {
+                throw new ServiceNotFoundException($id, null, null, array(), sprintf('The "%s" service or alias has been removed or inlined when the container was compiled. You should either make it public, or stop using the container directly and use dependency injection instead.', $id));
+            }
+
+            $alternatives = array();
+            foreach ($this->getServiceIds() as $knownId) {
+                $lev = levenshtein($id, $knownId);
+                if ($lev <= \strlen($id) / 3 || false !== strpos($knownId, $id)) {
+                    $alternatives[] = $knownId;
+                }
+            }
+
+            throw new ServiceNotFoundException($id, null, null, $alternatives);
+        }
+    }
+
+    /**
+     * Returns true if the given service has actually been initialized.
+     *
+     * @param string $id The service identifier
+     *
+     * @return bool true if service has already been initialized, false otherwise
+     */
+    public function initialized($id)
+    {
+        $id = $this->normalizeId($id);
+
+        if (isset($this->privates[$id])) {
+            @trigger_error(sprintf('Checking for the initialization of the "%s" private service is deprecated since Symfony 3.4 and won\'t be supported anymore in Symfony 4.0.', $id), E_USER_DEPRECATED);
+        }
+
+        if (isset($this->aliases[$id])) {
+            $id = $this->aliases[$id];
+        }
+
+        if ('service_container' === $id) {
+            return false;
+        }
+
+        return isset($this->services[$id]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function reset()
+    {
+        $this->services = array();
+    }
+
+    /**
+     * Gets all service ids.
+     *
+     * @return array An array of all defined service ids
+     */
+    public function getServiceIds()
+    {
+        $ids = array();
+
+        if (!$this->methodMap && !$this instanceof ContainerBuilder && __CLASS__ !== static::class) {
+            // We only check the convention-based factory in a compiled container (i.e. a child class other than a ContainerBuilder,
+            // and only when the dumper has not generated the method map (otherwise the method map is considered to be fully populated by the dumper)
+            @trigger_error('Generating a dumped container without populating the method map is deprecated since Symfony 3.2 and will be unsupported in 4.0. Update your dumper to generate the method map.', E_USER_DEPRECATED);
+
+            foreach (get_class_methods($this) as $method) {
+                if (preg_match('/^get(.+)Service$/', $method, $match)) {
+                    $ids[] = self::underscore($match[1]);
+                }
+            }
+        }
+        $ids[] = 'service_container';
+
+        return array_unique(array_merge($ids, array_keys($this->methodMap), array_keys($this->fileMap), array_keys($this->services)));
+    }
+
+    /**
+     * Gets service ids that existed at compile time.
+     *
+     * @return array
+     */
+    public function getRemovedIds()
+    {
+        return array();
+    }
+
+    /**
+     * Camelizes a string.
+     *
+     * @param string $id A string to camelize
+     *
+     * @return string The camelized string
+     */
+    public static function camelize($id)
+    {
+        return strtr(ucwords(strtr($id, array('_' => ' ', '.' => '_ ', '\\' => '_ '))), array(' ' => ''));
+    }
+
+    /**
+     * A string to underscore.
+     *
+     * @param string $id The string to underscore
+     *
+     * @return string The underscored string
+     */
+    public static function underscore($id)
+    {
+        return strtolower(preg_replace(array('/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'), array('\\1_\\2', '\\1_\\2'), str_replace('_', '.', $id)));
+    }
+
+    /**
+     * Creates a service by requiring its factory file.
+     *
+     * @return object The service created by the file
+     */
+    protected function load($file)
+    {
+        return require $file;
+    }
+
+    /**
+     * Fetches a variable from the environment.
+     *
+     * @param string $name The name of the environment variable
+     *
+     * @return mixed The value to use for the provided environment variable name
+     *
+     * @throws EnvNotFoundException When the environment variable is not found and has no default value
+     */
+    protected function getEnv($name)
+    {
+        if (isset($this->resolving[$envName = "env($name)"])) {
+            throw new ParameterCircularReferenceException(array_keys($this->resolving));
+        }
+        if (isset($this->envCache[$name]) || array_key_exists($name, $this->envCache)) {
+            return $this->envCache[$name];
+        }
+        if (!$this->has($id = 'container.env_var_processors_locator')) {
+            $this->set($id, new ServiceLocator(array()));
+        }
+        if (!$this->getEnv) {
+            $this->getEnv = new \ReflectionMethod($this, __FUNCTION__);
+            $this->getEnv->setAccessible(true);
+            $this->getEnv = $this->getEnv->getClosure($this);
+        }
+        $processors = $this->get($id);
+
+        if (false !== $i = strpos($name, ':')) {
+            $prefix = substr($name, 0, $i);
+            $localName = substr($name, 1 + $i);
+        } else {
+            $prefix = 'string';
+            $localName = $name;
+        }
+        $processor = $processors->has($prefix) ? $processors->get($prefix) : new EnvVarProcessor($this);
+
+        $this->resolving[$envName] = true;
+        try {
+            return $this->envCache[$name] = $processor->getEnv($prefix, $localName, $this->getEnv);
+        } finally {
+            unset($this->resolving[$envName]);
+        }
+    }
+
+    /**
+     * Returns the case sensitive id used at registration time.
+     *
+     * @param string $id
+     *
+     * @return string
+     *
+     * @internal
+     */
+    public function normalizeId($id)
+    {
+        if (!\is_string($id)) {
+            $id = (string) $id;
+        }
+        if (isset($this->normalizedIds[$normalizedId = strtolower($id)])) {
+            $normalizedId = $this->normalizedIds[$normalizedId];
+            if ($id !== $normalizedId) {
+                @trigger_error(sprintf('Service identifiers will be made case sensitive in Symfony 4.0. Using "%s" instead of "%s" is deprecated since Symfony 3.3.', $id, $normalizedId), E_USER_DEPRECATED);
+            }
+        } else {
+            $normalizedId = $this->normalizedIds[$normalizedId] = $id;
+        }
+
+        return $normalizedId;
+    }
+
+    private function __clone()
+    {
+    }
+}

vendor/symfony/dependency-injection/ContainerAwareInterface.php

@@ -0,0 +1,25 @@
+<?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;
+
+/**
+ * ContainerAwareInterface should be implemented by classes that depends on a Container.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface ContainerAwareInterface
+{
+    /**
+     * Sets the container.
+     */
+    public function setContainer(ContainerInterface $container = null);
+}

vendor/symfony/dependency-injection/ContainerAwareTrait.php

@@ -0,0 +1,30 @@
+<?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;
+
+/**
+ * ContainerAware trait.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+trait ContainerAwareTrait
+{
+    /**
+     * @var ContainerInterface
+     */
+    protected $container;
+
+    public function setContainer(ContainerInterface $container = null)
+    {
+        $this->container = $container;
+    }
+}

vendor/symfony/dependency-injection/ContainerInterface.php

@@ -0,0 +1,100 @@
+<?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;
+
+use Psr\Container\ContainerInterface as PsrContainerInterface;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
+use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
+
+/**
+ * ContainerInterface is the interface implemented by service container classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+interface ContainerInterface extends PsrContainerInterface
+{
+    const EXCEPTION_ON_INVALID_REFERENCE = 1;
+    const NULL_ON_INVALID_REFERENCE = 2;
+    const IGNORE_ON_INVALID_REFERENCE = 3;
+    const IGNORE_ON_UNINITIALIZED_REFERENCE = 4;
+
+    /**
+     * Sets a service.
+     *
+     * @param string $id      The service identifier
+     * @param object $service The service instance
+     */
+    public function set($id, $service);
+
+    /**
+     * Gets a service.
+     *
+     * @param string $id              The service identifier
+     * @param int    $invalidBehavior The behavior when the service does not exist
+     *
+     * @return object The associated service
+     *
+     * @throws ServiceCircularReferenceException When a circular reference is detected
+     * @throws ServiceNotFoundException          When the service is not defined
+     *
+     * @see Reference
+     */
+    public function get($id, $invalidBehavior = self::EXCEPTION_ON_INVALID_REFERENCE);
+
+    /**
+     * Returns true if the given service is defined.
+     *
+     * @param string $id The service identifier
+     *
+     * @return bool true if the service is defined, false otherwise
+     */
+    public function has($id);
+
+    /**
+     * Check for whether or not a service has been initialized.
+     *
+     * @param string $id
+     *
+     * @return bool true if the service has been initialized, false otherwise
+     */
+    public function initialized($id);
+
+    /**
+     * Gets a parameter.
+     *
+     * @param string $name The parameter name
+     *
+     * @return mixed The parameter value
+     *
+     * @throws InvalidArgumentException if the parameter is not defined
+     */
+    public function getParameter($name);
+
+    /**
+     * Checks if a parameter exists.
+     *
+     * @param string $name The parameter name
+     *
+     * @return bool The presence of parameter in container
+     */
+    public function hasParameter($name);
+
+    /**
+     * Sets a parameter.
+     *
+     * @param string $name  The parameter name
+     * @param mixed  $value The parameter value
+     */
+    public function setParameter($name, $value);
+}

vendor/symfony/dependency-injection/Definition.php

@@ -0,0 +1,975 @@
+<?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;
+
+use Symfony\Component\DependencyInjection\Argument\BoundArgument;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\OutOfBoundsException;
+
+/**
+ * Definition represents a service definition.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Definition
+{
+    private $class;
+    private $file;
+    private $factory;
+    private $shared = true;
+    private $deprecated = false;
+    private $deprecationTemplate;
+    private $properties = array();
+    private $calls = array();
+    private $instanceof = array();
+    private $autoconfigured = false;
+    private $configurator;
+    private $tags = array();
+    private $public = true;
+    private $private = true;
+    private $synthetic = false;
+    private $abstract = false;
+    private $lazy = false;
+    private $decoratedService;
+    private $autowired = false;
+    private $autowiringTypes = array();
+    private $changes = array();
+    private $bindings = array();
+    private $errors = array();
+
+    protected $arguments = array();
+
+    private static $defaultDeprecationTemplate = 'The "%service_id%" service is deprecated. You should stop using it, as it will soon be removed.';
+
+    /**
+     * @param string|null $class     The service class
+     * @param array       $arguments An array of arguments to pass to the service constructor
+     */
+    public function __construct($class = null, array $arguments = array())
+    {
+        if (null !== $class) {
+            $this->setClass($class);
+        }
+        $this->arguments = $arguments;
+    }
+
+    /**
+     * Returns all changes tracked for the Definition object.
+     *
+     * @return array An array of changes for this Definition
+     */
+    public function getChanges()
+    {
+        return $this->changes;
+    }
+
+    /**
+     * Sets the tracked changes for the Definition object.
+     *
+     * @param array $changes An array of changes for this Definition
+     *
+     * @return $this
+     */
+    public function setChanges(array $changes)
+    {
+        $this->changes = $changes;
+
+        return $this;
+    }
+
+    /**
+     * Sets a factory.
+     *
+     * @param string|array $factory A PHP function or an array containing a class/Reference and a method to call
+     *
+     * @return $this
+     */
+    public function setFactory($factory)
+    {
+        $this->changes['factory'] = true;
+
+        if (\is_string($factory) && false !== strpos($factory, '::')) {
+            $factory = explode('::', $factory, 2);
+        }
+
+        $this->factory = $factory;
+
+        return $this;
+    }
+
+    /**
+     * Gets the factory.
+     *
+     * @return string|array|null The PHP function or an array containing a class/Reference and a method to call
+     */
+    public function getFactory()
+    {
+        return $this->factory;
+    }
+
+    /**
+     * Sets the service that this service is decorating.
+     *
+     * @param string|null $id        The decorated service id, use null to remove decoration
+     * @param string|null $renamedId The new decorated service id
+     * @param int         $priority  The priority of decoration
+     *
+     * @return $this
+     *
+     * @throws InvalidArgumentException in case the decorated service id and the new decorated service id are equals
+     */
+    public function setDecoratedService($id, $renamedId = null, $priority = 0)
+    {
+        if ($renamedId && $id === $renamedId) {
+            throw new InvalidArgumentException(sprintf('The decorated service inner name for "%s" must be different than the service name itself.', $id));
+        }
+
+        $this->changes['decorated_service'] = true;
+
+        if (null === $id) {
+            $this->decoratedService = null;
+        } else {
+            $this->decoratedService = array($id, $renamedId, (int) $priority);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Gets the service that this service is decorating.
+     *
+     * @return array|null An array composed of the decorated service id, the new id for it and the priority of decoration, null if no service is decorated
+     */
+    public function getDecoratedService()
+    {
+        return $this->decoratedService;
+    }
+
+    /**
+     * Sets the service class.
+     *
+     * @param string $class The service class
+     *
+     * @return $this
+     */
+    public function setClass($class)
+    {
+        $this->changes['class'] = true;
+
+        $this->class = $class;
+
+        return $this;
+    }
+
+    /**
+     * Gets the service class.
+     *
+     * @return string|null The service class
+     */
+    public function getClass()
+    {
+        return $this->class;
+    }
+
+    /**
+     * Sets the arguments to pass to the service constructor/factory method.
+     *
+     * @return $this
+     */
+    public function setArguments(array $arguments)
+    {
+        $this->arguments = $arguments;
+
+        return $this;
+    }
+
+    /**
+     * Sets the properties to define when creating the service.
+     *
+     * @return $this
+     */
+    public function setProperties(array $properties)
+    {
+        $this->properties = $properties;
+
+        return $this;
+    }
+
+    /**
+     * Gets the properties to define when creating the service.
+     *
+     * @return array
+     */
+    public function getProperties()
+    {
+        return $this->properties;
+    }
+
+    /**
+     * Sets a specific property.
+     *
+     * @param string $name
+     * @param mixed  $value
+     *
+     * @return $this
+     */
+    public function setProperty($name, $value)
+    {
+        $this->properties[$name] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Adds an argument to pass to the service constructor/factory method.
+     *
+     * @param mixed $argument An argument
+     *
+     * @return $this
+     */
+    public function addArgument($argument)
+    {
+        $this->arguments[] = $argument;
+
+        return $this;
+    }
+
+    /**
+     * Replaces a specific argument.
+     *
+     * @param int|string $index
+     * @param mixed      $argument
+     *
+     * @return $this
+     *
+     * @throws OutOfBoundsException When the replaced argument does not exist
+     */
+    public function replaceArgument($index, $argument)
+    {
+        if (0 === \count($this->arguments)) {
+            throw new OutOfBoundsException('Cannot replace arguments if none have been configured yet.');
+        }
+
+        if (\is_int($index) && ($index < 0 || $index > \count($this->arguments) - 1)) {
+            throw new OutOfBoundsException(sprintf('The index "%d" is not in the range [0, %d].', $index, \count($this->arguments) - 1));
+        }
+
+        if (!array_key_exists($index, $this->arguments)) {
+            throw new OutOfBoundsException(sprintf('The argument "%s" doesn\'t exist.', $index));
+        }
+
+        $this->arguments[$index] = $argument;
+
+        return $this;
+    }
+
+    /**
+     * Sets a specific argument.
+     *
+     * @param int|string $key
+     * @param mixed      $value
+     *
+     * @return $this
+     */
+    public function setArgument($key, $value)
+    {
+        $this->arguments[$key] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Gets the arguments to pass to the service constructor/factory method.
+     *
+     * @return array The array of arguments
+     */
+    public function getArguments()
+    {
+        return $this->arguments;
+    }
+
+    /**
+     * Gets an argument to pass to the service constructor/factory method.
+     *
+     * @param int|string $index
+     *
+     * @return mixed The argument value
+     *
+     * @throws OutOfBoundsException When the argument does not exist
+     */
+    public function getArgument($index)
+    {
+        if (!array_key_exists($index, $this->arguments)) {
+            throw new OutOfBoundsException(sprintf('The argument "%s" doesn\'t exist.', $index));
+        }
+
+        return $this->arguments[$index];
+    }
+
+    /**
+     * Sets the methods to call after service initialization.
+     *
+     * @return $this
+     */
+    public function setMethodCalls(array $calls = array())
+    {
+        $this->calls = array();
+        foreach ($calls as $call) {
+            $this->addMethodCall($call[0], $call[1]);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Adds a method to call after service initialization.
+     *
+     * @param string $method    The method name to call
+     * @param array  $arguments An array of arguments to pass to the method call
+     *
+     * @return $this
+     *
+     * @throws InvalidArgumentException on empty $method param
+     */
+    public function addMethodCall($method, array $arguments = array())
+    {
+        if (empty($method)) {
+            throw new InvalidArgumentException('Method name cannot be empty.');
+        }
+        $this->calls[] = array($method, $arguments);
+
+        return $this;
+    }
+
+    /**
+     * Removes a method to call after service initialization.
+     *
+     * @param string $method The method name to remove
+     *
+     * @return $this
+     */
+    public function removeMethodCall($method)
+    {
+        foreach ($this->calls as $i => $call) {
+            if ($call[0] === $method) {
+                unset($this->calls[$i]);
+                break;
+            }
+        }
+
+        return $this;
+    }
+
+    /**
+     * Check if the current definition has a given method to call after service initialization.
+     *
+     * @param string $method The method name to search for
+     *
+     * @return bool
+     */
+    public function hasMethodCall($method)
+    {
+        foreach ($this->calls as $call) {
+            if ($call[0] === $method) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Gets the methods to call after service initialization.
+     *
+     * @return array An array of method calls
+     */
+    public function getMethodCalls()
+    {
+        return $this->calls;
+    }
+
+    /**
+     * Sets the definition templates to conditionally apply on the current definition, keyed by parent interface/class.
+     *
+     * @param $instanceof ChildDefinition[]
+     *
+     * @return $this
+     */
+    public function setInstanceofConditionals(array $instanceof)
+    {
+        $this->instanceof = $instanceof;
+
+        return $this;
+    }
+
+    /**
+     * Gets the definition templates to conditionally apply on the current definition, keyed by parent interface/class.
+     *
+     * @return ChildDefinition[]
+     */
+    public function getInstanceofConditionals()
+    {
+        return $this->instanceof;
+    }
+
+    /**
+     * Sets whether or not instanceof conditionals should be prepended with a global set.
+     *
+     * @param bool $autoconfigured
+     *
+     * @return $this
+     */
+    public function setAutoconfigured($autoconfigured)
+    {
+        $this->changes['autoconfigured'] = true;
+
+        $this->autoconfigured = $autoconfigured;
+
+        return $this;
+    }
+
+    /**
+     * @return bool
+     */
+    public function isAutoconfigured()
+    {
+        return $this->autoconfigured;
+    }
+
+    /**
+     * Sets tags for this definition.
+     *
+     * @return $this
+     */
+    public function setTags(array $tags)
+    {
+        $this->tags = $tags;
+
+        return $this;
+    }
+
+    /**
+     * Returns all tags.
+     *
+     * @return array An array of tags
+     */
+    public function getTags()
+    {
+        return $this->tags;
+    }
+
+    /**
+     * Gets a tag by name.
+     *
+     * @param string $name The tag name
+     *
+     * @return array An array of attributes
+     */
+    public function getTag($name)
+    {
+        return isset($this->tags[$name]) ? $this->tags[$name] : array();
+    }
+
+    /**
+     * Adds a tag for this definition.
+     *
+     * @param string $name       The tag name
+     * @param array  $attributes An array of attributes
+     *
+     * @return $this
+     */
+    public function addTag($name, array $attributes = array())
+    {
+        $this->tags[$name][] = $attributes;
+
+        return $this;
+    }
+
+    /**
+     * Whether this definition has a tag with the given name.
+     *
+     * @param string $name
+     *
+     * @return bool
+     */
+    public function hasTag($name)
+    {
+        return isset($this->tags[$name]);
+    }
+
+    /**
+     * Clears all tags for a given name.
+     *
+     * @param string $name The tag name
+     *
+     * @return $this
+     */
+    public function clearTag($name)
+    {
+        unset($this->tags[$name]);
+
+        return $this;
+    }
+
+    /**
+     * Clears the tags for this definition.
+     *
+     * @return $this
+     */
+    public function clearTags()
+    {
+        $this->tags = array();
+
+        return $this;
+    }
+
+    /**
+     * Sets a file to require before creating the service.
+     *
+     * @param string $file A full pathname to include
+     *
+     * @return $this
+     */
+    public function setFile($file)
+    {
+        $this->changes['file'] = true;
+
+        $this->file = $file;
+
+        return $this;
+    }
+
+    /**
+     * Gets the file to require before creating the service.
+     *
+     * @return string|null The full pathname to include
+     */
+    public function getFile()
+    {
+        return $this->file;
+    }
+
+    /**
+     * Sets if the service must be shared or not.
+     *
+     * @param bool $shared Whether the service must be shared or not
+     *
+     * @return $this
+     */
+    public function setShared($shared)
+    {
+        $this->changes['shared'] = true;
+
+        $this->shared = (bool) $shared;
+
+        return $this;
+    }
+
+    /**
+     * Whether this service is shared.
+     *
+     * @return bool
+     */
+    public function isShared()
+    {
+        return $this->shared;
+    }
+
+    /**
+     * Sets the visibility of this service.
+     *
+     * @param bool $boolean
+     *
+     * @return $this
+     */
+    public function setPublic($boolean)
+    {
+        $this->changes['public'] = true;
+
+        $this->public = (bool) $boolean;
+        $this->private = false;
+
+        return $this;
+    }
+
+    /**
+     * Whether this service is public facing.
+     *
+     * @return bool
+     */
+    public function isPublic()
+    {
+        return $this->public;
+    }
+
+    /**
+     * Sets if this service is private.
+     *
+     * When set, the "private" state has a higher precedence than "public".
+     * In version 3.4, a "private" service always remains publicly accessible,
+     * but triggers a deprecation notice when accessed from the container,
+     * so that the service can be made really private in 4.0.
+     *
+     * @param bool $boolean
+     *
+     * @return $this
+     */
+    public function setPrivate($boolean)
+    {
+        $this->private = (bool) $boolean;
+
+        return $this;
+    }
+
+    /**
+     * Whether this service is private.
+     *
+     * @return bool
+     */
+    public function isPrivate()
+    {
+        return $this->private;
+    }
+
+    /**
+     * Sets the lazy flag of this service.
+     *
+     * @param bool $lazy
+     *
+     * @return $this
+     */
+    public function setLazy($lazy)
+    {
+        $this->changes['lazy'] = true;
+
+        $this->lazy = (bool) $lazy;
+
+        return $this;
+    }
+
+    /**
+     * Whether this service is lazy.
+     *
+     * @return bool
+     */
+    public function isLazy()
+    {
+        return $this->lazy;
+    }
+
+    /**
+     * Sets whether this definition is synthetic, that is not constructed by the
+     * container, but dynamically injected.
+     *
+     * @param bool $boolean
+     *
+     * @return $this
+     */
+    public function setSynthetic($boolean)
+    {
+        $this->synthetic = (bool) $boolean;
+
+        return $this;
+    }
+
+    /**
+     * Whether this definition is synthetic, that is not constructed by the
+     * container, but dynamically injected.
+     *
+     * @return bool
+     */
+    public function isSynthetic()
+    {
+        return $this->synthetic;
+    }
+
+    /**
+     * Whether this definition is abstract, that means it merely serves as a
+     * template for other definitions.
+     *
+     * @param bool $boolean
+     *
+     * @return $this
+     */
+    public function setAbstract($boolean)
+    {
+        $this->abstract = (bool) $boolean;
+
+        return $this;
+    }
+
+    /**
+     * Whether this definition is abstract, that means it merely serves as a
+     * template for other definitions.
+     *
+     * @return bool
+     */
+    public function isAbstract()
+    {
+        return $this->abstract;
+    }
+
+    /**
+     * Whether this definition is deprecated, that means it should not be called
+     * anymore.
+     *
+     * @param bool   $status
+     * @param string $template Template message to use if the definition is deprecated
+     *
+     * @return $this
+     *
+     * @throws InvalidArgumentException when the message template is invalid
+     */
+    public function setDeprecated($status = true, $template = null)
+    {
+        if (null !== $template) {
+            if (preg_match('#[\r\n]|\*/#', $template)) {
+                throw new InvalidArgumentException('Invalid characters found in deprecation template.');
+            }
+
+            if (false === strpos($template, '%service_id%')) {
+                throw new InvalidArgumentException('The deprecation template must contain the "%service_id%" placeholder.');
+            }
+
+            $this->deprecationTemplate = $template;
+        }
+
+        $this->changes['deprecated'] = true;
+
+        $this->deprecated = (bool) $status;
+
+        return $this;
+    }
+
+    /**
+     * Whether this definition is deprecated, that means it should not be called
+     * anymore.
+     *
+     * @return bool
+     */
+    public function isDeprecated()
+    {
+        return $this->deprecated;
+    }
+
+    /**
+     * Message to use if this definition is deprecated.
+     *
+     * @param string $id Service id relying on this definition
+     *
+     * @return string
+     */
+    public function getDeprecationMessage($id)
+    {
+        return str_replace('%service_id%', $id, $this->deprecationTemplate ?: self::$defaultDeprecationTemplate);
+    }
+
+    /**
+     * Sets a configurator to call after the service is fully initialized.
+     *
+     * @param string|array $configurator A PHP callable
+     *
+     * @return $this
+     */
+    public function setConfigurator($configurator)
+    {
+        $this->changes['configurator'] = true;
+
+        if (\is_string($configurator) && false !== strpos($configurator, '::')) {
+            $configurator = explode('::', $configurator, 2);
+        }
+
+        $this->configurator = $configurator;
+
+        return $this;
+    }
+
+    /**
+     * Gets the configurator to call after the service is fully initialized.
+     *
+     * @return callable|null The PHP callable to call
+     */
+    public function getConfigurator()
+    {
+        return $this->configurator;
+    }
+
+    /**
+     * Sets types that will default to this definition.
+     *
+     * @param string[] $types
+     *
+     * @return $this
+     *
+     * @deprecated since version 3.3, to be removed in 4.0.
+     */
+    public function setAutowiringTypes(array $types)
+    {
+        @trigger_error('Autowiring-types are deprecated since Symfony 3.3 and will be removed in 4.0. Use aliases instead.', E_USER_DEPRECATED);
+
+        $this->autowiringTypes = array();
+
+        foreach ($types as $type) {
+            $this->autowiringTypes[$type] = true;
+        }
+
+        return $this;
+    }
+
+    /**
+     * Is the definition autowired?
+     *
+     * @return bool
+     */
+    public function isAutowired()
+    {
+        return $this->autowired;
+    }
+
+    /**
+     * Enables/disables autowiring.
+     *
+     * @param bool $autowired
+     *
+     * @return $this
+     */
+    public function setAutowired($autowired)
+    {
+        $this->changes['autowired'] = true;
+
+        $this->autowired = (bool) $autowired;
+
+        return $this;
+    }
+
+    /**
+     * Gets autowiring types that will default to this definition.
+     *
+     * @return string[]
+     *
+     * @deprecated since version 3.3, to be removed in 4.0.
+     */
+    public function getAutowiringTypes(/*$triggerDeprecation = true*/)
+    {
+        if (1 > \func_num_args() || func_get_arg(0)) {
+            @trigger_error('Autowiring-types are deprecated since Symfony 3.3 and will be removed in 4.0. Use aliases instead.', E_USER_DEPRECATED);
+        }
+
+        return array_keys($this->autowiringTypes);
+    }
+
+    /**
+     * Adds a type that will default to this definition.
+     *
+     * @param string $type
+     *
+     * @return $this
+     *
+     * @deprecated since version 3.3, to be removed in 4.0.
+     */
+    public function addAutowiringType($type)
+    {
+        @trigger_error(sprintf('Autowiring-types are deprecated since Symfony 3.3 and will be removed in 4.0. Use aliases instead for "%s".', $type), E_USER_DEPRECATED);
+
+        $this->autowiringTypes[$type] = true;
+
+        return $this;
+    }
+
+    /**
+     * Removes a type.
+     *
+     * @param string $type
+     *
+     * @return $this
+     *
+     * @deprecated since version 3.3, to be removed in 4.0.
+     */
+    public function removeAutowiringType($type)
+    {
+        @trigger_error(sprintf('Autowiring-types are deprecated since Symfony 3.3 and will be removed in 4.0. Use aliases instead for "%s".', $type), E_USER_DEPRECATED);
+
+        unset($this->autowiringTypes[$type]);
+
+        return $this;
+    }
+
+    /**
+     * Will this definition default for the given type?
+     *
+     * @param string $type
+     *
+     * @return bool
+     *
+     * @deprecated since version 3.3, to be removed in 4.0.
+     */
+    public function hasAutowiringType($type)
+    {
+        @trigger_error(sprintf('Autowiring-types are deprecated since Symfony 3.3 and will be removed in 4.0. Use aliases instead for "%s".', $type), E_USER_DEPRECATED);
+
+        return isset($this->autowiringTypes[$type]);
+    }
+
+    /**
+     * Gets bindings.
+     *
+     * @return array
+     */
+    public function getBindings()
+    {
+        return $this->bindings;
+    }
+
+    /**
+     * Sets bindings.
+     *
+     * Bindings map $named or FQCN arguments to values that should be
+     * injected in the matching parameters (of the constructor, of methods
+     * called and of controller actions).
+     *
+     * @param array $bindings
+     *
+     * @return $this
+     */
+    public function setBindings(array $bindings)
+    {
+        foreach ($bindings as $key => $binding) {
+            if (!$binding instanceof BoundArgument) {
+                $bindings[$key] = new BoundArgument($binding);
+            }
+        }
+
+        $this->bindings = $bindings;
+
+        return $this;
+    }
+
+    /**
+     * Add an error that occurred when building this Definition.
+     *
+     * @param string $error
+     */
+    public function addError($error)
+    {
+        $this->errors[] = $error;
+    }
+
+    /**
+     * Returns any errors that occurred while building this Definition.
+     *
+     * @return array
+     */
+    public function getErrors()
+    {
+        return $this->errors;
+    }
+}

vendor/symfony/dependency-injection/DefinitionDecorator.php

@@ -0,0 +1,29 @@
+<?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;
+
+@trigger_error('The '.__NAMESPACE__.'\DefinitionDecorator class is deprecated since Symfony 3.3 and will be removed in 4.0. Use the Symfony\Component\DependencyInjection\ChildDefinition class instead.', E_USER_DEPRECATED);
+
+class_exists(ChildDefinition::class);
+
+if (false) {
+    /**
+     * This definition decorates another definition.
+     *
+     * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+     *
+     * @deprecated The DefinitionDecorator class is deprecated since version 3.3 and will be removed in 4.0. Use the Symfony\Component\DependencyInjection\ChildDefinition class instead.
+     */
+    class DefinitionDecorator extends Definition
+    {
+    }
+}

vendor/symfony/dependency-injection/Dumper/Dumper.php

@@ -0,0 +1,29 @@
+<?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\Dumper;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+/**
+ * Dumper is the abstract class for all built-in dumpers.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class Dumper implements DumperInterface
+{
+    protected $container;
+
+    public function __construct(ContainerBuilder $container)
+    {
+        $this->container = $container;
+    }
+}

vendor/symfony/dependency-injection/Dumper/DumperInterface.php

@@ -0,0 +1,29 @@
+<?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\Dumper;
+
+/**
+ * DumperInterface is the interface implemented by service container dumper classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface DumperInterface
+{
+    /**
+     * Dumps the service container.
+     *
+     * @param array $options An array of options
+     *
+     * @return string The representation of the service container
+     */
+    public function dump(array $options = array());
+}

vendor/symfony/dependency-injection/Dumper/GraphvizDumper.php

@@ -0,0 +1,303 @@
+<?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\Dumper;
+
+use Symfony\Component\DependencyInjection\Argument\ArgumentInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
+use Symfony\Component\DependencyInjection\Parameter;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * GraphvizDumper dumps a service container as a graphviz file.
+ *
+ * You can convert the generated dot file with the dot utility (http://www.graphviz.org/):
+ *
+ *   dot -Tpng container.dot > foo.png
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class GraphvizDumper extends Dumper
+{
+    private $nodes;
+    private $edges;
+    private $options = array(
+            'graph' => array('ratio' => 'compress'),
+            'node' => array('fontsize' => 11, 'fontname' => 'Arial', 'shape' => 'record'),
+            'edge' => array('fontsize' => 9, 'fontname' => 'Arial', 'color' => 'grey', 'arrowhead' => 'open', 'arrowsize' => 0.5),
+            'node.instance' => array('fillcolor' => '#9999ff', 'style' => 'filled'),
+            'node.definition' => array('fillcolor' => '#eeeeee'),
+            'node.missing' => array('fillcolor' => '#ff9999', 'style' => 'filled'),
+        );
+
+    /**
+     * Dumps the service container as a graphviz graph.
+     *
+     * Available options:
+     *
+     *  * graph: The default options for the whole graph
+     *  * node: The default options for nodes
+     *  * edge: The default options for edges
+     *  * node.instance: The default options for services that are defined directly by object instances
+     *  * node.definition: The default options for services that are defined via service definition instances
+     *  * node.missing: The default options for missing services
+     *
+     * @return string The dot representation of the service container
+     */
+    public function dump(array $options = array())
+    {
+        foreach (array('graph', 'node', 'edge', 'node.instance', 'node.definition', 'node.missing') as $key) {
+            if (isset($options[$key])) {
+                $this->options[$key] = array_merge($this->options[$key], $options[$key]);
+            }
+        }
+
+        $this->nodes = $this->findNodes();
+
+        $this->edges = array();
+        foreach ($this->container->getDefinitions() as $id => $definition) {
+            $this->edges[$id] = array_merge(
+                $this->findEdges($id, $definition->getArguments(), true, ''),
+                $this->findEdges($id, $definition->getProperties(), false, '')
+            );
+
+            foreach ($definition->getMethodCalls() as $call) {
+                $this->edges[$id] = array_merge(
+                    $this->edges[$id],
+                    $this->findEdges($id, $call[1], false, $call[0].'()')
+                );
+            }
+        }
+
+        return $this->container->resolveEnvPlaceholders($this->startDot().$this->addNodes().$this->addEdges().$this->endDot(), '__ENV_%s__');
+    }
+
+    /**
+     * Returns all nodes.
+     *
+     * @return string A string representation of all nodes
+     */
+    private function addNodes()
+    {
+        $code = '';
+        foreach ($this->nodes as $id => $node) {
+            $aliases = $this->getAliases($id);
+
+            $code .= sprintf("  node_%s [label=\"%s\\n%s\\n\", shape=%s%s];\n", $this->dotize($id), $id.($aliases ? ' ('.implode(', ', $aliases).')' : ''), $node['class'], $this->options['node']['shape'], $this->addAttributes($node['attributes']));
+        }
+
+        return $code;
+    }
+
+    /**
+     * Returns all edges.
+     *
+     * @return string A string representation of all edges
+     */
+    private function addEdges()
+    {
+        $code = '';
+        foreach ($this->edges as $id => $edges) {
+            foreach ($edges as $edge) {
+                $code .= sprintf("  node_%s -> node_%s [label=\"%s\" style=\"%s\"%s];\n", $this->dotize($id), $this->dotize($edge['to']), $edge['name'], $edge['required'] ? 'filled' : 'dashed', $edge['lazy'] ? ' color="#9999ff"' : '');
+            }
+        }
+
+        return $code;
+    }
+
+    /**
+     * Finds all edges belonging to a specific service id.
+     *
+     * @param string $id        The service id used to find edges
+     * @param array  $arguments An array of arguments
+     * @param bool   $required
+     * @param string $name
+     *
+     * @return array An array of edges
+     */
+    private function findEdges($id, array $arguments, $required, $name, $lazy = false)
+    {
+        $edges = array();
+        foreach ($arguments as $argument) {
+            if ($argument instanceof Parameter) {
+                $argument = $this->container->hasParameter($argument) ? $this->container->getParameter($argument) : null;
+            } elseif (\is_string($argument) && preg_match('/^%([^%]+)%$/', $argument, $match)) {
+                $argument = $this->container->hasParameter($match[1]) ? $this->container->getParameter($match[1]) : null;
+            }
+
+            if ($argument instanceof Reference) {
+                $lazyEdge = $lazy;
+
+                if (!$this->container->has((string) $argument)) {
+                    $this->nodes[(string) $argument] = array('name' => $name, 'required' => $required, 'class' => '', 'attributes' => $this->options['node.missing']);
+                } elseif ('service_container' !== (string) $argument) {
+                    $lazyEdge = $lazy || $this->container->getDefinition((string) $argument)->isLazy();
+                }
+
+                $edges[] = array('name' => $name, 'required' => $required, 'to' => $argument, 'lazy' => $lazyEdge);
+            } elseif ($argument instanceof ArgumentInterface) {
+                $edges = array_merge($edges, $this->findEdges($id, $argument->getValues(), $required, $name, true));
+            } elseif (\is_array($argument)) {
+                $edges = array_merge($edges, $this->findEdges($id, $argument, $required, $name, $lazy));
+            }
+        }
+
+        return $edges;
+    }
+
+    /**
+     * Finds all nodes.
+     *
+     * @return array An array of all nodes
+     */
+    private function findNodes()
+    {
+        $nodes = array();
+
+        $container = $this->cloneContainer();
+
+        foreach ($container->getDefinitions() as $id => $definition) {
+            $class = $definition->getClass();
+
+            if ('\\' === substr($class, 0, 1)) {
+                $class = substr($class, 1);
+            }
+
+            try {
+                $class = $this->container->getParameterBag()->resolveValue($class);
+            } catch (ParameterNotFoundException $e) {
+            }
+
+            $nodes[$id] = array('class' => str_replace('\\', '\\\\', $class), 'attributes' => array_merge($this->options['node.definition'], array('style' => $definition->isShared() ? 'filled' : 'dotted')));
+            $container->setDefinition($id, new Definition('stdClass'));
+        }
+
+        foreach ($container->getServiceIds() as $id) {
+            if (array_key_exists($id, $container->getAliases())) {
+                continue;
+            }
+
+            if (!$container->hasDefinition($id)) {
+                $nodes[$id] = array('class' => str_replace('\\', '\\\\', \get_class($container->get($id))), 'attributes' => $this->options['node.instance']);
+            }
+        }
+
+        return $nodes;
+    }
+
+    private function cloneContainer()
+    {
+        $parameterBag = new ParameterBag($this->container->getParameterBag()->all());
+
+        $container = new ContainerBuilder($parameterBag);
+        $container->setDefinitions($this->container->getDefinitions());
+        $container->setAliases($this->container->getAliases());
+        $container->setResources($this->container->getResources());
+        foreach ($this->container->getExtensions() as $extension) {
+            $container->registerExtension($extension);
+        }
+
+        return $container;
+    }
+
+    /**
+     * Returns the start dot.
+     *
+     * @return string The string representation of a start dot
+     */
+    private function startDot()
+    {
+        return sprintf("digraph sc {\n  %s\n  node [%s];\n  edge [%s];\n\n",
+            $this->addOptions($this->options['graph']),
+            $this->addOptions($this->options['node']),
+            $this->addOptions($this->options['edge'])
+        );
+    }
+
+    /**
+     * Returns the end dot.
+     *
+     * @return string
+     */
+    private function endDot()
+    {
+        return "}\n";
+    }
+
+    /**
+     * Adds attributes.
+     *
+     * @param array $attributes An array of attributes
+     *
+     * @return string A comma separated list of attributes
+     */
+    private function addAttributes(array $attributes)
+    {
+        $code = array();
+        foreach ($attributes as $k => $v) {
+            $code[] = sprintf('%s="%s"', $k, $v);
+        }
+
+        return $code ? ', '.implode(', ', $code) : '';
+    }
+
+    /**
+     * Adds options.
+     *
+     * @param array $options An array of options
+     *
+     * @return string A space separated list of options
+     */
+    private function addOptions(array $options)
+    {
+        $code = array();
+        foreach ($options as $k => $v) {
+            $code[] = sprintf('%s="%s"', $k, $v);
+        }
+
+        return implode(' ', $code);
+    }
+
+    /**
+     * Dotizes an identifier.
+     *
+     * @param string $id The identifier to dotize
+     *
+     * @return string A dotized string
+     */
+    private function dotize($id)
+    {
+        return strtolower(preg_replace('/\W/i', '_', $id));
+    }
+
+    /**
+     * Compiles an array of aliases for a specified service id.
+     *
+     * @param string $id A service id
+     *
+     * @return array An array of aliases
+     */
+    private function getAliases($id)
+    {
+        $aliases = array();
+        foreach ($this->container->getAliases() as $alias => $origin) {
+            if ($id == $origin) {
+                $aliases[] = $alias;
+            }
+        }
+
+        return $aliases;
+    }
+}

vendor/symfony/dependency-injection/Dumper/XmlDumper.php

@@ -0,0 +1,366 @@
+<?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\Dumper;
+
+use Symfony\Component\DependencyInjection\Alias;
+use Symfony\Component\DependencyInjection\Argument\IteratorArgument;
+use Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument;
+use Symfony\Component\DependencyInjection\Argument\TaggedIteratorArgument;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Parameter;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\ExpressionLanguage\Expression;
+
+/**
+ * XmlDumper dumps a service container as an XML string.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Martin Hasoň <martin.hason@gmail.com>
+ */
+class XmlDumper extends Dumper
+{
+    /**
+     * @var \DOMDocument
+     */
+    private $document;
+
+    /**
+     * Dumps the service container as an XML string.
+     *
+     * @return string An xml string representing of the service container
+     */
+    public function dump(array $options = array())
+    {
+        $this->document = new \DOMDocument('1.0', 'utf-8');
+        $this->document->formatOutput = true;
+
+        $container = $this->document->createElementNS('http://symfony.com/schema/dic/services', 'container');
+        $container->setAttribute('xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance');
+        $container->setAttribute('xsi:schemaLocation', 'http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd');
+
+        $this->addParameters($container);
+        $this->addServices($container);
+
+        $this->document->appendChild($container);
+        $xml = $this->document->saveXML();
+        $this->document = null;
+
+        return $this->container->resolveEnvPlaceholders($xml);
+    }
+
+    private function addParameters(\DOMElement $parent)
+    {
+        $data = $this->container->getParameterBag()->all();
+        if (!$data) {
+            return;
+        }
+
+        if ($this->container->isCompiled()) {
+            $data = $this->escape($data);
+        }
+
+        $parameters = $this->document->createElement('parameters');
+        $parent->appendChild($parameters);
+        $this->convertParameters($data, 'parameter', $parameters);
+    }
+
+    private function addMethodCalls(array $methodcalls, \DOMElement $parent)
+    {
+        foreach ($methodcalls as $methodcall) {
+            $call = $this->document->createElement('call');
+            $call->setAttribute('method', $methodcall[0]);
+            if (\count($methodcall[1])) {
+                $this->convertParameters($methodcall[1], 'argument', $call);
+            }
+            $parent->appendChild($call);
+        }
+    }
+
+    /**
+     * Adds a service.
+     *
+     * @param Definition  $definition
+     * @param string      $id
+     * @param \DOMElement $parent
+     */
+    private function addService($definition, $id, \DOMElement $parent)
+    {
+        $service = $this->document->createElement('service');
+        if (null !== $id) {
+            $service->setAttribute('id', $id);
+        }
+        if ($class = $definition->getClass()) {
+            if ('\\' === substr($class, 0, 1)) {
+                $class = substr($class, 1);
+            }
+
+            $service->setAttribute('class', $class);
+        }
+        if (!$definition->isShared()) {
+            $service->setAttribute('shared', 'false');
+        }
+        if (!$definition->isPrivate()) {
+            $service->setAttribute('public', $definition->isPublic() ? 'true' : 'false');
+        }
+        if ($definition->isSynthetic()) {
+            $service->setAttribute('synthetic', 'true');
+        }
+        if ($definition->isLazy()) {
+            $service->setAttribute('lazy', 'true');
+        }
+        if (null !== $decorated = $definition->getDecoratedService()) {
+            list($decorated, $renamedId, $priority) = $decorated;
+            $service->setAttribute('decorates', $decorated);
+            if (null !== $renamedId) {
+                $service->setAttribute('decoration-inner-name', $renamedId);
+            }
+            if (0 !== $priority) {
+                $service->setAttribute('decoration-priority', $priority);
+            }
+        }
+
+        foreach ($definition->getTags() as $name => $tags) {
+            foreach ($tags as $attributes) {
+                $tag = $this->document->createElement('tag');
+                $tag->setAttribute('name', $name);
+                foreach ($attributes as $key => $value) {
+                    $tag->setAttribute($key, $value);
+                }
+                $service->appendChild($tag);
+            }
+        }
+
+        if ($definition->getFile()) {
+            $file = $this->document->createElement('file');
+            $file->appendChild($this->document->createTextNode($definition->getFile()));
+            $service->appendChild($file);
+        }
+
+        if ($parameters = $definition->getArguments()) {
+            $this->convertParameters($parameters, 'argument', $service);
+        }
+
+        if ($parameters = $definition->getProperties()) {
+            $this->convertParameters($parameters, 'property', $service, 'name');
+        }
+
+        $this->addMethodCalls($definition->getMethodCalls(), $service);
+
+        if ($callable = $definition->getFactory()) {
+            $factory = $this->document->createElement('factory');
+
+            if (\is_array($callable) && $callable[0] instanceof Definition) {
+                $this->addService($callable[0], null, $factory);
+                $factory->setAttribute('method', $callable[1]);
+            } elseif (\is_array($callable)) {
+                if (null !== $callable[0]) {
+                    $factory->setAttribute($callable[0] instanceof Reference ? 'service' : 'class', $callable[0]);
+                }
+                $factory->setAttribute('method', $callable[1]);
+            } else {
+                $factory->setAttribute('function', $callable);
+            }
+            $service->appendChild($factory);
+        }
+
+        if ($definition->isDeprecated()) {
+            $deprecated = $this->document->createElement('deprecated');
+            $deprecated->appendChild($this->document->createTextNode($definition->getDeprecationMessage('%service_id%')));
+
+            $service->appendChild($deprecated);
+        }
+
+        if ($definition->isAutowired()) {
+            $service->setAttribute('autowire', 'true');
+        }
+
+        foreach ($definition->getAutowiringTypes(false) as $autowiringTypeValue) {
+            $autowiringType = $this->document->createElement('autowiring-type');
+            $autowiringType->appendChild($this->document->createTextNode($autowiringTypeValue));
+
+            $service->appendChild($autowiringType);
+        }
+
+        if ($definition->isAutoconfigured()) {
+            $service->setAttribute('autoconfigure', 'true');
+        }
+
+        if ($definition->isAbstract()) {
+            $service->setAttribute('abstract', 'true');
+        }
+
+        if ($callable = $definition->getConfigurator()) {
+            $configurator = $this->document->createElement('configurator');
+
+            if (\is_array($callable) && $callable[0] instanceof Definition) {
+                $this->addService($callable[0], null, $configurator);
+                $configurator->setAttribute('method', $callable[1]);
+            } elseif (\is_array($callable)) {
+                $configurator->setAttribute($callable[0] instanceof Reference ? 'service' : 'class', $callable[0]);
+                $configurator->setAttribute('method', $callable[1]);
+            } else {
+                $configurator->setAttribute('function', $callable);
+            }
+            $service->appendChild($configurator);
+        }
+
+        $parent->appendChild($service);
+    }
+
+    /**
+     * Adds a service alias.
+     *
+     * @param string      $alias
+     * @param Alias       $id
+     * @param \DOMElement $parent
+     */
+    private function addServiceAlias($alias, Alias $id, \DOMElement $parent)
+    {
+        $service = $this->document->createElement('service');
+        $service->setAttribute('id', $alias);
+        $service->setAttribute('alias', $id);
+        if (!$id->isPrivate()) {
+            $service->setAttribute('public', $id->isPublic() ? 'true' : 'false');
+        }
+        $parent->appendChild($service);
+    }
+
+    private function addServices(\DOMElement $parent)
+    {
+        $definitions = $this->container->getDefinitions();
+        if (!$definitions) {
+            return;
+        }
+
+        $services = $this->document->createElement('services');
+        foreach ($definitions as $id => $definition) {
+            $this->addService($definition, $id, $services);
+        }
+
+        $aliases = $this->container->getAliases();
+        foreach ($aliases as $alias => $id) {
+            while (isset($aliases[(string) $id])) {
+                $id = $aliases[(string) $id];
+            }
+            $this->addServiceAlias($alias, $id, $services);
+        }
+        $parent->appendChild($services);
+    }
+
+    /**
+     * Converts parameters.
+     *
+     * @param array       $parameters
+     * @param string      $type
+     * @param \DOMElement $parent
+     * @param string      $keyAttribute
+     */
+    private function convertParameters(array $parameters, $type, \DOMElement $parent, $keyAttribute = 'key')
+    {
+        $withKeys = array_keys($parameters) !== range(0, \count($parameters) - 1);
+        foreach ($parameters as $key => $value) {
+            $element = $this->document->createElement($type);
+            if ($withKeys) {
+                $element->setAttribute($keyAttribute, $key);
+            }
+
+            if ($value instanceof ServiceClosureArgument) {
+                $value = $value->getValues()[0];
+            }
+            if (\is_array($value)) {
+                $element->setAttribute('type', 'collection');
+                $this->convertParameters($value, $type, $element, 'key');
+            } elseif ($value instanceof TaggedIteratorArgument) {
+                $element->setAttribute('type', 'tagged');
+                $element->setAttribute('tag', $value->getTag());
+            } elseif ($value instanceof IteratorArgument) {
+                $element->setAttribute('type', 'iterator');
+                $this->convertParameters($value->getValues(), $type, $element, 'key');
+            } elseif ($value instanceof Reference) {
+                $element->setAttribute('type', 'service');
+                $element->setAttribute('id', (string) $value);
+                $behaviour = $value->getInvalidBehavior();
+                if (ContainerInterface::NULL_ON_INVALID_REFERENCE == $behaviour) {
+                    $element->setAttribute('on-invalid', 'null');
+                } elseif (ContainerInterface::IGNORE_ON_INVALID_REFERENCE == $behaviour) {
+                    $element->setAttribute('on-invalid', 'ignore');
+                } elseif (ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE == $behaviour) {
+                    $element->setAttribute('on-invalid', 'ignore_uninitialized');
+                }
+            } elseif ($value instanceof Definition) {
+                $element->setAttribute('type', 'service');
+                $this->addService($value, null, $element);
+            } elseif ($value instanceof Expression) {
+                $element->setAttribute('type', 'expression');
+                $text = $this->document->createTextNode(self::phpToXml((string) $value));
+                $element->appendChild($text);
+            } else {
+                if (\in_array($value, array('null', 'true', 'false'), true)) {
+                    $element->setAttribute('type', 'string');
+                }
+                $text = $this->document->createTextNode(self::phpToXml($value));
+                $element->appendChild($text);
+            }
+            $parent->appendChild($element);
+        }
+    }
+
+    /**
+     * Escapes arguments.
+     *
+     * @return array
+     */
+    private function escape(array $arguments)
+    {
+        $args = array();
+        foreach ($arguments as $k => $v) {
+            if (\is_array($v)) {
+                $args[$k] = $this->escape($v);
+            } elseif (\is_string($v)) {
+                $args[$k] = str_replace('%', '%%', $v);
+            } else {
+                $args[$k] = $v;
+            }
+        }
+
+        return $args;
+    }
+
+    /**
+     * Converts php types to xml types.
+     *
+     * @param mixed $value Value to convert
+     *
+     * @return string
+     *
+     * @throws RuntimeException When trying to dump object or resource
+     */
+    public static function phpToXml($value)
+    {
+        switch (true) {
+            case null === $value:
+                return 'null';
+            case true === $value:
+                return 'true';
+            case false === $value:
+                return 'false';
+            case $value instanceof Parameter:
+                return '%'.$value.'%';
+            case \is_object($value) || \is_resource($value):
+                throw new RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');
+            default:
+                return (string) $value;
+        }
+    }
+}

vendor/symfony/dependency-injection/Dumper/YamlDumper.php

@@ -0,0 +1,381 @@
+<?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\Dumper;
+
+use Symfony\Component\DependencyInjection\Alias;
+use Symfony\Component\DependencyInjection\Argument\ArgumentInterface;
+use Symfony\Component\DependencyInjection\Argument\IteratorArgument;
+use Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument;
+use Symfony\Component\DependencyInjection\Argument\TaggedIteratorArgument;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Parameter;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\ExpressionLanguage\Expression;
+use Symfony\Component\Yaml\Dumper as YmlDumper;
+use Symfony\Component\Yaml\Parser;
+use Symfony\Component\Yaml\Tag\TaggedValue;
+use Symfony\Component\Yaml\Yaml;
+
+/**
+ * YamlDumper dumps a service container as a YAML string.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class YamlDumper extends Dumper
+{
+    private $dumper;
+
+    /**
+     * Dumps the service container as an YAML string.
+     *
+     * @return string A YAML string representing of the service container
+     */
+    public function dump(array $options = array())
+    {
+        if (!class_exists('Symfony\Component\Yaml\Dumper')) {
+            throw new RuntimeException('Unable to dump the container as the Symfony Yaml Component is not installed.');
+        }
+
+        if (null === $this->dumper) {
+            $this->dumper = new YmlDumper();
+        }
+
+        return $this->container->resolveEnvPlaceholders($this->addParameters()."\n".$this->addServices());
+    }
+
+    /**
+     * Adds a service.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     *
+     * @return string
+     */
+    private function addService($id, Definition $definition)
+    {
+        $code = "    $id:\n";
+        if ($class = $definition->getClass()) {
+            if ('\\' === substr($class, 0, 1)) {
+                $class = substr($class, 1);
+            }
+
+            $code .= sprintf("        class: %s\n", $this->dumper->dump($class));
+        }
+
+        if (!$definition->isPrivate()) {
+            $code .= sprintf("        public: %s\n", $definition->isPublic() ? 'true' : 'false');
+        }
+
+        $tagsCode = '';
+        foreach ($definition->getTags() as $name => $tags) {
+            foreach ($tags as $attributes) {
+                $att = array();
+                foreach ($attributes as $key => $value) {
+                    $att[] = sprintf('%s: %s', $this->dumper->dump($key), $this->dumper->dump($value));
+                }
+                $att = $att ? ', '.implode(', ', $att) : '';
+
+                $tagsCode .= sprintf("            - { name: %s%s }\n", $this->dumper->dump($name), $att);
+            }
+        }
+        if ($tagsCode) {
+            $code .= "        tags:\n".$tagsCode;
+        }
+
+        if ($definition->getFile()) {
+            $code .= sprintf("        file: %s\n", $this->dumper->dump($definition->getFile()));
+        }
+
+        if ($definition->isSynthetic()) {
+            $code .= "        synthetic: true\n";
+        }
+
+        if ($definition->isDeprecated()) {
+            $code .= sprintf("        deprecated: %s\n", $this->dumper->dump($definition->getDeprecationMessage('%service_id%')));
+        }
+
+        if ($definition->isAutowired()) {
+            $code .= "        autowire: true\n";
+        }
+
+        $autowiringTypesCode = '';
+        foreach ($definition->getAutowiringTypes(false) as $autowiringType) {
+            $autowiringTypesCode .= sprintf("            - %s\n", $this->dumper->dump($autowiringType));
+        }
+        if ($autowiringTypesCode) {
+            $code .= sprintf("        autowiring_types:\n%s", $autowiringTypesCode);
+        }
+
+        if ($definition->isAutoconfigured()) {
+            $code .= "        autoconfigure: true\n";
+        }
+
+        if ($definition->isAbstract()) {
+            $code .= "        abstract: true\n";
+        }
+
+        if ($definition->isLazy()) {
+            $code .= "        lazy: true\n";
+        }
+
+        if ($definition->getArguments()) {
+            $code .= sprintf("        arguments: %s\n", $this->dumper->dump($this->dumpValue($definition->getArguments()), 0));
+        }
+
+        if ($definition->getProperties()) {
+            $code .= sprintf("        properties: %s\n", $this->dumper->dump($this->dumpValue($definition->getProperties()), 0));
+        }
+
+        if ($definition->getMethodCalls()) {
+            $code .= sprintf("        calls:\n%s\n", $this->dumper->dump($this->dumpValue($definition->getMethodCalls()), 1, 12));
+        }
+
+        if (!$definition->isShared()) {
+            $code .= "        shared: false\n";
+        }
+
+        if (null !== $decorated = $definition->getDecoratedService()) {
+            list($decorated, $renamedId, $priority) = $decorated;
+            $code .= sprintf("        decorates: %s\n", $decorated);
+            if (null !== $renamedId) {
+                $code .= sprintf("        decoration_inner_name: %s\n", $renamedId);
+            }
+            if (0 !== $priority) {
+                $code .= sprintf("        decoration_priority: %s\n", $priority);
+            }
+        }
+
+        if ($callable = $definition->getFactory()) {
+            $code .= sprintf("        factory: %s\n", $this->dumper->dump($this->dumpCallable($callable), 0));
+        }
+
+        if ($callable = $definition->getConfigurator()) {
+            $code .= sprintf("        configurator: %s\n", $this->dumper->dump($this->dumpCallable($callable), 0));
+        }
+
+        return $code;
+    }
+
+    /**
+     * Adds a service alias.
+     *
+     * @param string $alias
+     * @param Alias  $id
+     *
+     * @return string
+     */
+    private function addServiceAlias($alias, Alias $id)
+    {
+        if ($id->isPrivate()) {
+            return sprintf("    %s: '@%s'\n", $alias, $id);
+        }
+
+        return sprintf("    %s:\n        alias: %s\n        public: %s\n", $alias, $id, $id->isPublic() ? 'true' : 'false');
+    }
+
+    /**
+     * Adds services.
+     *
+     * @return string
+     */
+    private function addServices()
+    {
+        if (!$this->container->getDefinitions()) {
+            return '';
+        }
+
+        $code = "services:\n";
+        foreach ($this->container->getDefinitions() as $id => $definition) {
+            $code .= $this->addService($id, $definition);
+        }
+
+        $aliases = $this->container->getAliases();
+        foreach ($aliases as $alias => $id) {
+            while (isset($aliases[(string) $id])) {
+                $id = $aliases[(string) $id];
+            }
+            $code .= $this->addServiceAlias($alias, $id);
+        }
+
+        return $code;
+    }
+
+    /**
+     * Adds parameters.
+     *
+     * @return string
+     */
+    private function addParameters()
+    {
+        if (!$this->container->getParameterBag()->all()) {
+            return '';
+        }
+
+        $parameters = $this->prepareParameters($this->container->getParameterBag()->all(), $this->container->isCompiled());
+
+        return $this->dumper->dump(array('parameters' => $parameters), 2);
+    }
+
+    /**
+     * Dumps callable to YAML format.
+     *
+     * @param callable $callable
+     *
+     * @return callable
+     */
+    private function dumpCallable($callable)
+    {
+        if (\is_array($callable)) {
+            if ($callable[0] instanceof Reference) {
+                $callable = array($this->getServiceCall((string) $callable[0], $callable[0]), $callable[1]);
+            } else {
+                $callable = array($callable[0], $callable[1]);
+            }
+        }
+
+        return $callable;
+    }
+
+    /**
+     * Dumps the value to YAML format.
+     *
+     * @param mixed $value
+     *
+     * @return mixed
+     *
+     * @throws RuntimeException When trying to dump object or resource
+     */
+    private function dumpValue($value)
+    {
+        if ($value instanceof ServiceClosureArgument) {
+            $value = $value->getValues()[0];
+        }
+        if ($value instanceof ArgumentInterface) {
+            if ($value instanceof TaggedIteratorArgument) {
+                return new TaggedValue('tagged', $value->getTag());
+            }
+            if ($value instanceof IteratorArgument) {
+                $tag = 'iterator';
+            } else {
+                throw new RuntimeException(sprintf('Unspecified Yaml tag for type "%s".', \get_class($value)));
+            }
+
+            return new TaggedValue($tag, $this->dumpValue($value->getValues()));
+        }
+
+        if (\is_array($value)) {
+            $code = array();
+            foreach ($value as $k => $v) {
+                $code[$k] = $this->dumpValue($v);
+            }
+
+            return $code;
+        } elseif ($value instanceof Reference) {
+            return $this->getServiceCall((string) $value, $value);
+        } elseif ($value instanceof Parameter) {
+            return $this->getParameterCall((string) $value);
+        } elseif ($value instanceof Expression) {
+            return $this->getExpressionCall((string) $value);
+        } elseif ($value instanceof Definition) {
+            return new TaggedValue('service', (new Parser())->parse("_:\n".$this->addService('_', $value), Yaml::PARSE_CUSTOM_TAGS)['_']['_']);
+        } elseif (\is_object($value) || \is_resource($value)) {
+            throw new RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');
+        }
+
+        return $value;
+    }
+
+    /**
+     * Gets the service call.
+     *
+     * @param string    $id
+     * @param Reference $reference
+     *
+     * @return string
+     */
+    private function getServiceCall($id, Reference $reference = null)
+    {
+        if (null !== $reference) {
+            switch ($reference->getInvalidBehavior()) {
+                case ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE: break;
+                case ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE: return sprintf('@!%s', $id);
+                default: return sprintf('@?%s', $id);
+            }
+        }
+
+        return sprintf('@%s', $id);
+    }
+
+    /**
+     * Gets parameter call.
+     *
+     * @param string $id
+     *
+     * @return string
+     */
+    private function getParameterCall($id)
+    {
+        return sprintf('%%%s%%', $id);
+    }
+
+    private function getExpressionCall($expression)
+    {
+        return sprintf('@=%s', $expression);
+    }
+
+    /**
+     * Prepares parameters.
+     *
+     * @param array $parameters
+     * @param bool  $escape
+     *
+     * @return array
+     */
+    private function prepareParameters(array $parameters, $escape = true)
+    {
+        $filtered = array();
+        foreach ($parameters as $key => $value) {
+            if (\is_array($value)) {
+                $value = $this->prepareParameters($value, $escape);
+            } elseif ($value instanceof Reference || \is_string($value) && 0 === strpos($value, '@')) {
+                $value = '@'.$value;
+            }
+
+            $filtered[$key] = $value;
+        }
+
+        return $escape ? $this->escape($filtered) : $filtered;
+    }
+
+    /**
+     * Escapes arguments.
+     *
+     * @return array
+     */
+    private function escape(array $arguments)
+    {
+        $args = array();
+        foreach ($arguments as $k => $v) {
+            if (\is_array($v)) {
+                $args[$k] = $this->escape($v);
+            } elseif (\is_string($v)) {
+                $args[$k] = str_replace('%', '%%', $v);
+            } else {
+                $args[$k] = $v;
+            }
+        }
+
+        return $args;
+    }
+}

vendor/symfony/dependency-injection/EnvVarProcessor.php

@@ -0,0 +1,163 @@
+<?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;
+
+use Symfony\Component\Config\Util\XmlUtils;
+use Symfony\Component\DependencyInjection\Exception\EnvNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class EnvVarProcessor implements EnvVarProcessorInterface
+{
+    private $container;
+
+    public function __construct(ContainerInterface $container)
+    {
+        $this->container = $container;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public static function getProvidedTypes()
+    {
+        return array(
+            'base64' => 'string',
+            'bool' => 'bool',
+            'const' => 'bool|int|float|string|array',
+            'file' => 'string',
+            'float' => 'float',
+            'int' => 'int',
+            'json' => 'array',
+            'resolve' => 'string',
+            'string' => 'string',
+        );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getEnv($prefix, $name, \Closure $getEnv)
+    {
+        $i = strpos($name, ':');
+
+        if ('file' === $prefix) {
+            if (!is_scalar($file = $getEnv($name))) {
+                throw new RuntimeException(sprintf('Invalid file name: env var "%s" is non-scalar.', $name));
+            }
+            if (!file_exists($file)) {
+                throw new RuntimeException(sprintf('Env "file:%s" not found: %s does not exist.', $name, $file));
+            }
+
+            return file_get_contents($file);
+        }
+
+        if (false !== $i || 'string' !== $prefix) {
+            if (null === $env = $getEnv($name)) {
+                return;
+            }
+        } elseif (isset($_ENV[$name])) {
+            $env = $_ENV[$name];
+        } elseif (isset($_SERVER[$name]) && 0 !== strpos($name, 'HTTP_')) {
+            $env = $_SERVER[$name];
+        } elseif (false === ($env = getenv($name)) || null === $env) { // null is a possible value because of thread safety issues
+            if (!$this->container->hasParameter("env($name)")) {
+                throw new EnvNotFoundException($name);
+            }
+
+            if (null === $env = $this->container->getParameter("env($name)")) {
+                return;
+            }
+        }
+
+        if (!is_scalar($env)) {
+            throw new RuntimeException(sprintf('Non-scalar env var "%s" cannot be cast to %s.', $name, $prefix));
+        }
+
+        if ('string' === $prefix) {
+            return (string) $env;
+        }
+
+        if ('bool' === $prefix) {
+            return (bool) self::phpize($env);
+        }
+
+        if ('int' === $prefix) {
+            if (!is_numeric($env = self::phpize($env))) {
+                throw new RuntimeException(sprintf('Non-numeric env var "%s" cannot be cast to int.', $name));
+            }
+
+            return (int) $env;
+        }
+
+        if ('float' === $prefix) {
+            if (!is_numeric($env = self::phpize($env))) {
+                throw new RuntimeException(sprintf('Non-numeric env var "%s" cannot be cast to float.', $name));
+            }
+
+            return (float) $env;
+        }
+
+        if ('const' === $prefix) {
+            if (!\defined($env)) {
+                throw new RuntimeException(sprintf('Env var "%s" maps to undefined constant "%s".', $name, $env));
+            }
+
+            return \constant($env);
+        }
+
+        if ('base64' === $prefix) {
+            return base64_decode($env);
+        }
+
+        if ('json' === $prefix) {
+            $env = json_decode($env, true);
+
+            if (JSON_ERROR_NONE !== json_last_error()) {
+                throw new RuntimeException(sprintf('Invalid JSON in env var "%s": '.json_last_error_msg(), $name));
+            }
+
+            if (!\is_array($env)) {
+                throw new RuntimeException(sprintf('Invalid JSON env var "%s": array expected, %s given.', $name, \gettype($env)));
+            }
+
+            return $env;
+        }
+
+        if ('resolve' === $prefix) {
+            return preg_replace_callback('/%%|%([^%\s]+)%/', function ($match) use ($name) {
+                if (!isset($match[1])) {
+                    return '%';
+                }
+                $value = $this->container->getParameter($match[1]);
+                if (!is_scalar($value)) {
+                    throw new RuntimeException(sprintf('Parameter "%s" found when resolving env var "%s" must be scalar, "%s" given.', $match[1], $name, \gettype($value)));
+                }
+
+                return $value;
+            }, $env);
+        }
+
+        throw new RuntimeException(sprintf('Unsupported env var prefix "%s".', $prefix));
+    }
+
+    private static function phpize($value)
+    {
+        if (!class_exists(XmlUtils::class)) {
+            throw new RuntimeException('The Symfony Config component is required to cast env vars to "bool", "int" or "float".');
+        }
+
+        return XmlUtils::phpize($value);
+    }
+}

vendor/symfony/dependency-injection/EnvVarProcessorInterface.php

@@ -0,0 +1,40 @@
+<?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;
+
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * The EnvVarProcessorInterface is implemented by objects that manage environment-like variables.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+interface EnvVarProcessorInterface
+{
+    /**
+     * Returns the value of the given variable as managed by the current instance.
+     *
+     * @param string   $prefix The namespace of the variable
+     * @param string   $name   The name of the variable within the namespace
+     * @param \Closure $getEnv A closure that allows fetching more env vars
+     *
+     * @return mixed
+     *
+     * @throws RuntimeException on error
+     */
+    public function getEnv($prefix, $name, \Closure $getEnv);
+
+    /**
+     * @return string[] The PHP-types managed by getEnv(), keyed by prefixes
+     */
+    public static function getProvidedTypes();
+}

vendor/symfony/dependency-injection/Exception/AutowiringFailedException.php

@@ -0,0 +1,32 @@
+<?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\Exception;
+
+/**
+ * Thrown when a definition cannot be autowired.
+ */
+class AutowiringFailedException extends RuntimeException
+{
+    private $serviceId;
+
+    public function __construct($serviceId, $message = '', $code = 0, \Exception $previous = null)
+    {
+        $this->serviceId = $serviceId;
+
+        parent::__construct($message, $code, $previous);
+    }
+
+    public function getServiceId()
+    {
+        return $this->serviceId;
+    }
+}

vendor/symfony/dependency-injection/Exception/BadMethodCallException.php

@@ -0,0 +1,19 @@
+<?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\Exception;
+
+/**
+ * Base BadMethodCallException for Dependency Injection component.
+ */
+class BadMethodCallException extends \BadMethodCallException implements ExceptionInterface
+{
+}

vendor/symfony/dependency-injection/Exception/EnvNotFoundException.php

@@ -0,0 +1,25 @@
+<?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\Exception;
+
+/**
+ * This exception is thrown when an environment variable is not found.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class EnvNotFoundException extends InvalidArgumentException
+{
+    public function __construct($name)
+    {
+        parent::__construct(sprintf('Environment variable not found: "%s".', $name));
+    }
+}

vendor/symfony/dependency-injection/Exception/EnvParameterException.php

@@ -0,0 +1,25 @@
+<?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\Exception;
+
+/**
+ * This exception wraps exceptions whose messages contain a reference to an env parameter.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class EnvParameterException extends InvalidArgumentException
+{
+    public function __construct(array $envs, \Exception $previous = null, $message = 'Incompatible use of dynamic environment variables "%s" found in parameters.')
+    {
+        parent::__construct(sprintf($message, implode('", "', $envs)), 0, $previous);
+    }
+}

vendor/symfony/dependency-injection/Exception/ExceptionInterface.php

@@ -0,0 +1,24 @@
+<?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\Exception;
+
+use Psr\Container\ContainerExceptionInterface;
+
+/**
+ * Base ExceptionInterface for Dependency Injection component.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Bulat Shakirzyanov <bulat@theopenskyproject.com>
+ */
+interface ExceptionInterface extends ContainerExceptionInterface
+{
+}

vendor/symfony/dependency-injection/Exception/InvalidArgumentException.php

@@ -0,0 +1,21 @@
+<?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\Exception;
+
+/**
+ * Base InvalidArgumentException for Dependency Injection component.
+ *
+ * @author Bulat Shakirzyanov <bulat@theopenskyproject.com>
+ */
+class InvalidArgumentException extends \InvalidArgumentException implements ExceptionInterface
+{
+}

vendor/symfony/dependency-injection/Exception/LogicException.php

@@ -0,0 +1,19 @@
+<?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\Exception;
+
+/**
+ * Base LogicException for Dependency Injection component.
+ */
+class LogicException extends \LogicException implements ExceptionInterface
+{
+}

vendor/symfony/dependency-injection/Exception/OutOfBoundsException.php

@@ -0,0 +1,19 @@
+<?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\Exception;
+
+/**
+ * Base OutOfBoundsException for Dependency Injection component.
+ */
+class OutOfBoundsException extends \OutOfBoundsException implements ExceptionInterface
+{
+}

vendor/symfony/dependency-injection/Exception/ParameterCircularReferenceException.php

@@ -0,0 +1,34 @@
+<?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\Exception;
+
+/**
+ * This exception is thrown when a circular reference in a parameter is detected.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class ParameterCircularReferenceException extends RuntimeException
+{
+    private $parameters;
+
+    public function __construct($parameters, \Exception $previous = null)
+    {
+        parent::__construct(sprintf('Circular reference detected for parameter "%s" ("%s" > "%s").', $parameters[0], implode('" > "', $parameters), $parameters[0]), 0, $previous);
+
+        $this->parameters = $parameters;
+    }
+
+    public function getParameters()
+    {
+        return $this->parameters;
+    }
+}

vendor/symfony/dependency-injection/Exception/ParameterNotFoundException.php

@@ -0,0 +1,98 @@
+<?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\Exception;
+
+/**
+ * This exception is thrown when a non-existent parameter is used.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class ParameterNotFoundException extends InvalidArgumentException
+{
+    private $key;
+    private $sourceId;
+    private $sourceKey;
+    private $alternatives;
+    private $nonNestedAlternative;
+
+    /**
+     * @param string      $key                  The requested parameter key
+     * @param string      $sourceId             The service id that references the non-existent parameter
+     * @param string      $sourceKey            The parameter key that references the non-existent parameter
+     * @param \Exception  $previous             The previous exception
+     * @param string[]    $alternatives         Some parameter name alternatives
+     * @param string|null $nonNestedAlternative The alternative parameter name when the user expected dot notation for nested parameters
+     */
+    public function __construct($key, $sourceId = null, $sourceKey = null, \Exception $previous = null, array $alternatives = array(), $nonNestedAlternative = null)
+    {
+        $this->key = $key;
+        $this->sourceId = $sourceId;
+        $this->sourceKey = $sourceKey;
+        $this->alternatives = $alternatives;
+        $this->nonNestedAlternative = $nonNestedAlternative;
+
+        parent::__construct('', 0, $previous);
+
+        $this->updateRepr();
+    }
+
+    public function updateRepr()
+    {
+        if (null !== $this->sourceId) {
+            $this->message = sprintf('The service "%s" has a dependency on a non-existent parameter "%s".', $this->sourceId, $this->key);
+        } elseif (null !== $this->sourceKey) {
+            $this->message = sprintf('The parameter "%s" has a dependency on a non-existent parameter "%s".', $this->sourceKey, $this->key);
+        } else {
+            $this->message = sprintf('You have requested a non-existent parameter "%s".', $this->key);
+        }
+
+        if ($this->alternatives) {
+            if (1 == \count($this->alternatives)) {
+                $this->message .= ' Did you mean this: "';
+            } else {
+                $this->message .= ' Did you mean one of these: "';
+            }
+            $this->message .= implode('", "', $this->alternatives).'"?';
+        } elseif (null !== $this->nonNestedAlternative) {
+            $this->message .= ' You cannot access nested array items, do you want to inject "'.$this->nonNestedAlternative.'" instead?';
+        }
+    }
+
+    public function getKey()
+    {
+        return $this->key;
+    }
+
+    public function getSourceId()
+    {
+        return $this->sourceId;
+    }
+
+    public function getSourceKey()
+    {
+        return $this->sourceKey;
+    }
+
+    public function setSourceId($sourceId)
+    {
+        $this->sourceId = $sourceId;
+
+        $this->updateRepr();
+    }
+
+    public function setSourceKey($sourceKey)
+    {
+        $this->sourceKey = $sourceKey;
+
+        $this->updateRepr();
+    }
+}

vendor/symfony/dependency-injection/Exception/RuntimeException.php

@@ -0,0 +1,21 @@
+<?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\Exception;
+
+/**
+ * Base RuntimeException for Dependency Injection component.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class RuntimeException extends \RuntimeException implements ExceptionInterface
+{
+}

vendor/symfony/dependency-injection/Exception/ServiceCircularReferenceException.php

@@ -0,0 +1,41 @@
+<?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\Exception;
+
+/**
+ * This exception is thrown when a circular reference is detected.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ServiceCircularReferenceException extends RuntimeException
+{
+    private $serviceId;
+    private $path;
+
+    public function __construct($serviceId, array $path, \Exception $previous = null)
+    {
+        parent::__construct(sprintf('Circular reference detected for service "%s", path: "%s".', $serviceId, implode(' -> ', $path)), 0, $previous);
+
+        $this->serviceId = $serviceId;
+        $this->path = $path;
+    }
+
+    public function getServiceId()
+    {
+        return $this->serviceId;
+    }
+
+    public function getPath()
+    {
+        return $this->path;
+    }
+}

vendor/symfony/dependency-injection/Exception/ServiceNotFoundException.php

@@ -0,0 +1,67 @@
+<?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\Exception;
+
+use Psr\Container\NotFoundExceptionInterface;
+
+/**
+ * This exception is thrown when a non-existent service is requested.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ServiceNotFoundException extends InvalidArgumentException implements NotFoundExceptionInterface
+{
+    private $id;
+    private $sourceId;
+    private $alternatives;
+
+    public function __construct($id, $sourceId = null, \Exception $previous = null, array $alternatives = array(), $msg = null)
+    {
+        if (null !== $msg) {
+            // no-op
+        } elseif (null === $sourceId) {
+            $msg = sprintf('You have requested a non-existent service "%s".', $id);
+        } else {
+            $msg = sprintf('The service "%s" has a dependency on a non-existent service "%s".', $sourceId, $id);
+        }
+
+        if ($alternatives) {
+            if (1 == \count($alternatives)) {
+                $msg .= ' Did you mean this: "';
+            } else {
+                $msg .= ' Did you mean one of these: "';
+            }
+            $msg .= implode('", "', $alternatives).'"?';
+        }
+
+        parent::__construct($msg, 0, $previous);
+
+        $this->id = $id;
+        $this->sourceId = $sourceId;
+        $this->alternatives = $alternatives;
+    }
+
+    public function getId()
+    {
+        return $this->id;
+    }
+
+    public function getSourceId()
+    {
+        return $this->sourceId;
+    }
+
+    public function getAlternatives()
+    {
+        return $this->alternatives;
+    }
+}

vendor/symfony/dependency-injection/ExpressionLanguage.php

@@ -0,0 +1,35 @@
+<?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;
+
+use Symfony\Component\ExpressionLanguage\ExpressionLanguage as BaseExpressionLanguage;
+
+/**
+ * Adds some function to the default ExpressionLanguage.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @see ExpressionLanguageProvider
+ */
+class ExpressionLanguage extends BaseExpressionLanguage
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function __construct($cache = null, array $providers = array(), callable $serviceCompiler = null)
+    {
+        // prepend the default provider to let users override it easily
+        array_unshift($providers, new ExpressionLanguageProvider($serviceCompiler));
+
+        parent::__construct($cache, $providers);
+    }
+}

vendor/symfony/dependency-injection/ExpressionLanguageProvider.php

@@ -0,0 +1,50 @@
+<?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;
+
+use Symfony\Component\ExpressionLanguage\ExpressionFunction;
+use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
+
+/**
+ * Define some ExpressionLanguage functions.
+ *
+ * To get a service, use service('request').
+ * To get a parameter, use parameter('kernel.debug').
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class ExpressionLanguageProvider implements ExpressionFunctionProviderInterface
+{
+    private $serviceCompiler;
+
+    public function __construct(callable $serviceCompiler = null)
+    {
+        $this->serviceCompiler = $serviceCompiler;
+    }
+
+    public function getFunctions()
+    {
+        return array(
+            new ExpressionFunction('service', $this->serviceCompiler ?: function ($arg) {
+                return sprintf('$this->get(%s)', $arg);
+            }, function (array $variables, $value) {
+                return $variables['container']->get($value);
+            }),
+
+            new ExpressionFunction('parameter', function ($arg) {
+                return sprintf('$this->getParameter(%s)', $arg);
+            }, function (array $variables, $value) {
+                return $variables['container']->getParameter($value);
+            }),
+        );
+    }
+}

vendor/symfony/dependency-injection/Extension/ConfigurationExtensionInterface.php

@@ -0,0 +1,30 @@
+<?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\Extension;
+
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+/**
+ * ConfigurationExtensionInterface is the interface implemented by container extension classes.
+ *
+ * @author Kevin Bond <kevinbond@gmail.com>
+ */
+interface ConfigurationExtensionInterface
+{
+    /**
+     * Returns extension configuration.
+     *
+     * @return ConfigurationInterface|null The configuration or null
+     */
+    public function getConfiguration(array $config, ContainerBuilder $container);
+}

vendor/symfony/dependency-injection/Extension/Extension.php

@@ -0,0 +1,124 @@
+<?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\Extension;
+
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\BadMethodCallException;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+
+/**
+ * Provides useful features shared by many extensions.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class Extension implements ExtensionInterface, ConfigurationExtensionInterface
+{
+    private $processedConfigs = array();
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getXsdValidationBasePath()
+    {
+        return false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getNamespace()
+    {
+        return 'http://example.org/schema/dic/'.$this->getAlias();
+    }
+
+    /**
+     * Returns the recommended alias to use in XML.
+     *
+     * This alias is also the mandatory prefix to use when using YAML.
+     *
+     * This convention is to remove the "Extension" postfix from the class
+     * name and then lowercase and underscore the result. So:
+     *
+     *     AcmeHelloExtension
+     *
+     * becomes
+     *
+     *     acme_hello
+     *
+     * This can be overridden in a sub-class to specify the alias manually.
+     *
+     * @return string The alias
+     *
+     * @throws BadMethodCallException When the extension name does not follow conventions
+     */
+    public function getAlias()
+    {
+        $className = \get_class($this);
+        if ('Extension' != substr($className, -9)) {
+            throw new BadMethodCallException('This extension does not follow the naming convention; you must overwrite the getAlias() method.');
+        }
+        $classBaseName = substr(strrchr($className, '\\'), 1, -9);
+
+        return Container::underscore($classBaseName);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getConfiguration(array $config, ContainerBuilder $container)
+    {
+        $class = \get_class($this);
+        $class = substr_replace($class, '\Configuration', strrpos($class, '\\'));
+        $class = $container->getReflectionClass($class);
+        $constructor = $class ? $class->getConstructor() : null;
+
+        if ($class && (!$constructor || !$constructor->getNumberOfRequiredParameters())) {
+            return $class->newInstance();
+        }
+    }
+
+    final protected function processConfiguration(ConfigurationInterface $configuration, array $configs)
+    {
+        $processor = new Processor();
+
+        return $this->processedConfigs[] = $processor->processConfiguration($configuration, $configs);
+    }
+
+    /**
+     * @internal
+     */
+    final public function getProcessedConfigs()
+    {
+        try {
+            return $this->processedConfigs;
+        } finally {
+            $this->processedConfigs = array();
+        }
+    }
+
+    /**
+     * @return bool Whether the configuration is enabled
+     *
+     * @throws InvalidArgumentException When the config is not enableable
+     */
+    protected function isConfigEnabled(ContainerBuilder $container, array $config)
+    {
+        if (!array_key_exists('enabled', $config)) {
+            throw new InvalidArgumentException("The config array has no 'enabled' key.");
+        }
+
+        return (bool) $container->getParameterBag()->resolveValue($config['enabled']);
+    }
+}

vendor/symfony/dependency-injection/Extension/ExtensionInterface.php

@@ -0,0 +1,52 @@
+<?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\Extension;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+/**
+ * ExtensionInterface is the interface implemented by container extension classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface ExtensionInterface
+{
+    /**
+     * Loads a specific configuration.
+     *
+     * @throws \InvalidArgumentException When provided tag is not defined in this extension
+     */
+    public function load(array $configs, ContainerBuilder $container);
+
+    /**
+     * Returns the namespace to be used for this extension (XML namespace).
+     *
+     * @return string The XML namespace
+     */
+    public function getNamespace();
+
+    /**
+     * Returns the base path for the XSD files.
+     *
+     * @return string The XSD base path
+     */
+    public function getXsdValidationBasePath();
+
+    /**
+     * Returns the recommended alias to use in XML.
+     *
+     * This alias is also the mandatory prefix to use when using YAML.
+     *
+     * @return string The alias
+     */
+    public function getAlias();
+}

vendor/symfony/dependency-injection/Extension/PrependExtensionInterface.php

@@ -0,0 +1,22 @@
+<?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\Extension;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+interface PrependExtensionInterface
+{
+    /**
+     * Allow an extension to prepend the extension configurations.
+     */
+    public function prepend(ContainerBuilder $container);
+}

vendor/symfony/dependency-injection/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2004-2018 Fabien Potencier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/symfony/dependency-injection/LazyProxy/Instantiator/InstantiatorInterface.php

@@ -0,0 +1,36 @@
+<?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\LazyProxy\Instantiator;
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Definition;
+
+/**
+ * Lazy proxy instantiator, capable of instantiating a proxy given a container, the
+ * service definitions and a callback that produces the real service instance.
+ *
+ * @author Marco Pivetta <ocramius@gmail.com>
+ */
+interface InstantiatorInterface
+{
+    /**
+     * Instantiates a proxy object.
+     *
+     * @param ContainerInterface $container        The container from which the service is being requested
+     * @param Definition         $definition       The definition of the requested service
+     * @param string             $id               Identifier of the requested service
+     * @param callable           $realInstantiator Zero-argument callback that is capable of producing the real service instance
+     *
+     * @return object
+     */
+    public function instantiateProxy(ContainerInterface $container, Definition $definition, $id, $realInstantiator);
+}

vendor/symfony/dependency-injection/LazyProxy/Instantiator/RealServiceInstantiator.php

@@ -0,0 +1,33 @@
+<?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\LazyProxy\Instantiator;
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Definition;
+
+/**
+ * {@inheritdoc}
+ *
+ * Noop proxy instantiator - simply produces the real service instead of a proxy instance.
+ *
+ * @author Marco Pivetta <ocramius@gmail.com>
+ */
+class RealServiceInstantiator implements InstantiatorInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function instantiateProxy(ContainerInterface $container, Definition $definition, $id, $realInstantiator)
+    {
+        return \call_user_func($realInstantiator);
+    }
+}

vendor/symfony/dependency-injection/LazyProxy/PhpDumper/DumperInterface.php

@@ -0,0 +1,47 @@
+<?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\LazyProxy\PhpDumper;
+
+use Symfony\Component\DependencyInjection\Definition;
+
+/**
+ * Lazy proxy dumper capable of generating the instantiation logic PHP code for proxied services.
+ *
+ * @author Marco Pivetta <ocramius@gmail.com>
+ */
+interface DumperInterface
+{
+    /**
+     * Inspects whether the given definitions should produce proxy instantiation logic in the dumped container.
+     *
+     * @return bool
+     */
+    public function isProxyCandidate(Definition $definition);
+
+    /**
+     * Generates the code to be used to instantiate a proxy in the dumped factory code.
+     *
+     * @param Definition $definition
+     * @param string     $id          Service identifier
+     * @param string     $factoryCode The code to execute to create the service, will be added to the interface in 4.0
+     *
+     * @return string
+     */
+    public function getProxyFactoryCode(Definition $definition, $id/**, $factoryCode = null */);
+
+    /**
+     * Generates the code for the lazy proxy.
+     *
+     * @return string
+     */
+    public function getProxyCode(Definition $definition);
+}