How does Magento\Setup\Module\Di\Compiler\Config\Chain\InterceptorSubstitution::modify() work?

dmitry_fedyuk · October 14, 2017, 9:09am

Context: How are the generated/medatata files generated in Magento 2.2?

magento/magento2/blob/2.2.0/setup/src/Magento/Setup/Module/Di/Compiler/Config/Chain/InterceptorSubstitution.php#L12-L29


/**
 * Modifies input config
 *
 * @param array $config
 * @return array
 */
public function modify(array $config)
{
    $configKeys = [
        'arguments',
        'preferences',
        'instanceTypes'
    ];
    if ($configKeys != array_keys($config)) {
        return $config;
    }


    $interceptors = $this->getInterceptorsList($config['arguments']);

Details: How does Magento\Setup\Module\Di\Compiler\Config\Chain\InterceptorSubstitution::getInterceptorsList() work?

github.com

magento/magento2/blob/2.2.0/setup/src/Magento/Setup/Module/Di/Compiler/Config/Chain/InterceptorSubstitution.php#L31-L40


$config['arguments'] = array_diff_key($config['arguments'], array_flip($interceptors));


foreach ($interceptors as $originalName => $interceptor) {
    if (isset($config['arguments'][$originalName])) {
        $config['arguments'][$interceptor] = $config['arguments'][$originalName];
        unset($config['arguments'][$originalName]);
    }
}


$config['preferences'] = $this->resolvePreferences($config['preferences'], $interceptors);

Details: How does Magento\Setup\Module\Di\Compiler\Config\Chain\InterceptorSubstitution::resolvePreferences() work?

github.com

magento/magento2/blob/2.2.0/setup/src/Magento/Setup/Module/Di/Compiler/Config/Chain/InterceptorSubstitution.php#L41-L44


$config['preferences'] = array_merge($interceptors, $config['preferences']);
$config['instanceTypes'] = $this->resolvePreferences($config['instanceTypes'], $interceptors);


return $config;