Puli\Manager\Conflict\DependencyGraph::forModules PHP Method

    public static function forModules(ModuleList $modules)
    {
        $graph = new static($modules->getModuleNames());
        foreach ($modules as $module) {
            if (null === $module->getModuleFile()) {
                continue;
            }
            foreach ($module->getModuleFile()->getDependencies() as $dependency) {
                if ($graph->hasModuleName($dependency)) {
                    $graph->addDependency($module->getName(), $dependency);
                }
            }
        }
        // Do we have a root module?
        if (null === $modules->getRootModule()) {
            return $graph;
        }
        // Make sure we have numeric, ascending keys here
        $moduleOrder = array_values($modules->getRootModule()->getModuleFile()->getModuleOrder());
        // Each module overrides the previous one in the list
        for ($i = 1, $l = count($moduleOrder); $i < $l; ++$i) {
            $dependency = $moduleOrder[$i - 1];
            $moduleName = $moduleOrder[$i];
            if ($graph->hasModuleName($dependency)) {
                $graph->addDependency($moduleName, $dependency);
            }
        }
        return $graph;
    }

 /**
  * Adds the getModuleOrder() method.
  *
  * @param Clazz $class The factory class model.
  */
 public function addGetModuleOrderMethod(Clazz $class)
 {
     $class->addImport(new Import('Puli\\Discovery\\Api\\Discovery'));
     $class->addImport(new Import('Puli\\Manager\\Api\\Server\\ServerCollection'));
     $class->addImport(new Import('Puli\\UrlGenerator\\Api\\UrlGenerator'));
     $class->addImport(new Import('Puli\\UrlGenerator\\DiscoveryUrlGenerator'));
     $class->addImport(new Import('RuntimeException'));
     $method = new Method('getModuleOrder');
     $method->setDescription("Returns the order in which the installed modules should be loaded\naccording to the override statements.");
     $method->setReturnValue(new ReturnValue('$order', 'string[]', 'The sorted module names.'));
     $moduleOrderString = '';
     if (count($this->modules) > 0) {
         $overrideGraph = DependencyGraph::forModules($this->modules);
         foreach ($overrideGraph->getSortedModuleNames() as $moduleName) {
             $moduleOrderString .= sprintf("\n    %s,", var_export($moduleName, true));
         }
         $moduleOrderString .= "\n";
     }
     $method->addBody("\$order = array({$moduleOrderString});");
     $class->addMethod($method);
 }