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<?php |
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/** |
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* Copyright MediaCT. All rights reserved. |
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* https://www.mediact.nl |
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*/ |
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namespace Mediact\DependencyGuard\Composer\Locker; |
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use Composer\Package\Locker; |
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use Composer\Package\PackageInterface; |
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use SplObjectStorage; |
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class PackageRequirementsResolver implements PackageRequirementsResolverInterface |
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{ |
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/** @var SplObjectStorage|PackageInterface[][][] */ |
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private $resolvedLockers; |
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/** |
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* Constructor. |
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* |
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* @param SplObjectStorage|null $resolvedLockers |
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*/ |
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public function __construct(SplObjectStorage $resolvedLockers = null) |
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{ |
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$this->resolvedLockers = $resolvedLockers ?? new SplObjectStorage(); |
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} |
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/** |
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* Resolve the dependents graph for the given Composer locker. |
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* |
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* @param Locker $locker |
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* |
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* @return array|PackageInterface[][] |
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*/ |
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public function resolve(Locker $locker): array |
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{ |
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if (!$this->resolvedLockers->contains($locker)) { |
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$lockedPackages = $locker->getLockedRepository()->getPackages(); |
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$this->resolvedLockers->attach( |
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$locker, |
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array_map( |
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function (array $packages) use ($lockedPackages) : array { |
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return array_reduce( |
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$lockedPackages, |
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function ( |
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array $carry, |
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PackageInterface $package |
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) use ($packages) : array { |
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if (in_array( |
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$package->getName(), |
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$packages, |
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true |
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)) { |
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$carry[] = $package; |
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} |
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return $carry; |
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}, |
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[] |
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); |
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}, |
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$this->resolveGraph( |
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...$locker->getLockData()['packages'] ?? [] |
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) |
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) |
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); |
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} |
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return $this->resolvedLockers->offsetGet($locker); |
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} |
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/** |
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* Get the dependent packages for the given package, using the given locker. |
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* |
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* @param string $package |
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* @param Locker $locker |
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* |
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* @return array|PackageInterface[] |
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*/ |
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public function getDependents(string $package, Locker $locker): array |
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{ |
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return $this->resolve($locker)[$package] ?? []; |
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} |
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/** |
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* Resolve the dependents graph for the given packages. |
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* |
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* @param array ...$packages |
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* |
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* @return string[] |
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*/ |
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private function resolveGraph(array ...$packages): array |
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{ |
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$graph = array_reduce( |
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$packages, |
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function (array $carry, array $package): array { |
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foreach (array_keys($package['require'] ?? []) as $link) { |
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if (!preg_match('/^[^\/]+\/[^\/]+$/', $link)) { |
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// Most likely a platform requirement. |
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// E.g.: php |
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// E.g.: ext-openssl |
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continue; |
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} |
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if (!array_key_exists($link, $carry)) { |
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$carry[$link] = []; |
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} |
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if (!in_array($package['name'], $carry[$link], true)) { |
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$carry[$link][] = $package['name']; |
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} |
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} |
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return $carry; |
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}, |
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[] |
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); |
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// While the graph keeps receiving updates, keep on resolving. |
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for ($previousGraph = []; $graph !== $previousGraph;) { |
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// Do not update the previous graph before the current iteration |
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// has started. |
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$previousGraph = $graph; |
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// For each package and its dependents in the graph ... |
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foreach ($graph as $package => $dependents) { |
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// ... Update the dependents of the package with grandparents. |
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$graph[$package] = array_reduce( |
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// Determine grandparents by looking up the parents of the |
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// available dependents. |
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$dependents, |
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function (array $carry, string $parent) use ($graph): array { |
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foreach ($graph[$parent] ?? [] as $grandparent) { |
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if (!in_array($grandparent, $carry, true)) { |
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$carry[] = $grandparent; |
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} |
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} |
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return $carry; |
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}, |
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// Start out with the current list of dependents. |
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$dependents |
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); |
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} |
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} |
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return $graph; |
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} |
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} |
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mediact /
dependency-guard
