src/ModuleDependencyResolver.php
private function getComponentDependencyMap(array $modules) : array
    {
        $component_dependency_map = [];
        $child_component_module_list = [];
        foreach($modules as $key => $m)
        {
            $component_type = call_user_func([$m, 'declareComponentType']);

            $required_components = call_user_func([$m, 'requiredComponents']);

            $dependency = [
                $component_type => $required_components,
            ];

            $component_dependency_map = $this->mergeDependencyMap($component_dependency_map, $dependency);

            foreach($required_components as $component_type){
                $component_module = $this->findComponentModuleByType($modules, $component_type);
                if (!$component_module){
                    throw new ModuleDependencyResolverException(
                        'Could not find component module: ' . $component_type . '(required by module: ' . $m . ')'
                    );
                }
                if (!in_array($component_module, $modules)){
                    $child_component_module_list[] = $component_module;
                }
            }
        }

        if (!empty($child_component_module_list)){
            $child_component_dependency_map = $this->getComponentDependencyMap($child_component_module_list);
            $component_dependency_map = $this->mergeDependencyMap($component_dependency_map, $child_component_dependency_map);
        }

        return $component_dependency_map;
    }
private function getComponentDependencyMap(array $modules) : array
    {
        $component_dependency_map = [];
        $child_component_module_list = [];
        foreach($modules as $key => $m)
        {
            $component_type = call_user_func([$m, 'declareComponentType']);

            $required_components = call_user_func([$m, 'requiredComponents']);

            $dependency = [
                $component_type => $required_components,
            ];

            $component_dependency_map = $this->mergeDependencyMap($component_dependency_map, $dependency);

            foreach($required_components as $component_type){
                $component_module = $this->findComponentModuleByType($modules, $component_type);
                if (!$component_module){
                    throw new ModuleDependencyResolverException(
                        'Could not find component module: ' . $component_type . '(required by module: ' . $m . ')'
                    );
                }
                if (!in_array($component_module, $modules)){
                    $child_component_module_list[] = $component_module;
                }
            }
        }

        if (!empty($child_component_module_list)){
            $child_component_dependency_map = $this->getComponentDependencyMap($child_component_module_list);
            $component_dependency_map = $this->mergeDependencyMap($component_dependency_map, $child_component_dependency_map);
        }

        return $component_dependency_map;
    }
@param string[] $modules

@return array

@throws ModuleDependencyResolverException