Symfony DI:在捆绑包构建期间访问编译器传递的配置参数

Question

编译器传递期间是否可以获取配置参数？ 我有这个扩展配置：

my_extension:
foo: 'bar'

我需要在添加编译器传递之前查看是否设置了配置：

<?php
namespace MyTestBundle;
use SymfonyComponentHttpKernelBundleBundle;
use SymfonyComponentDependencyInjectionContainerBuilder;
use DoctrineBundleDoctrineBundleDependencyInjectionCompilerDoctrineOrmMappingsPass;
class MyTestBundle extends Bundle
{
/**
* @param ContainerBuilder $container
*/
public function build(ContainerBuilder $container)
{
parent::build($container);
// Here I need to check if 'foo' == 'bar' from the extension config and then add the following compiler pass
$container->addCompilerPass(
DoctrineOrmMappingsPass::createAnnotationMappingDriver(
[__NAMESPACE__],
[
__DIR__.'/Model',
]
)
);
}
}

问题是在编译器传递时，扩展配置尚未处理：还是我错了？

Answer 1

通过在捆绑包上使用编译器传递来解决它，如下所示：

class MyTestBundle extends Bundle
{
/**
* @param ContainerBuilder $container
*/
public function build(ContainerBuilder $container)
{
parent::build($container);
$container->addCompilerPass(new MyTestBundleCompilerPass());
}
}

然后在编译器传递上使用扩展，如下所示：

class MyTestBundleCompilerPass implements CompilerPassInterface
{
/**
* @param ContainerBuilder $container
*/
public function process(ContainerBuilder $container)
{
if (!$container->hasExtension(MyTestExtension::ALIAS)) {
return;
}
/** @var MyTestExtension $extension */
$extension = $container->getExtension(MyTestExtension::ALIAS);
$config = $extension->getConfig();
if (array_key_exists('foo', $config) && $config['foo']) {
$container->addCompilerPass(
DoctrineOrmMappingsPass::createAnnotationMappingDriver(
[__NAMESPACE__],
[
__DIR__.'/Model',
]
)
);
}
}
}

然后使用扩展名读取配置：

class MyTestExtension extends Extension
{
const ALIAS = 'my_extension';
private $config = array();
/**
* {@inheritdoc}
*/
public function load(array $configs, ContainerBuilder $container)
{
$configuration = new Configuration();
$this->config = $this->processConfiguration($configuration, $configs);
$container->setParameter(self::ALIAS.'.foo', $this->config['foo']);
$loader = new LoaderYamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
$loader->load('services.yml');
// Extensions to override configs for
$loader->load('config.yml');
}
public function getConfig()
{
try {
return $this->config;
} finally {
// Erases the config after it is retrieved, for security and performance reasons
$this->config = array();
}
}
}