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64 lines
1.6 KiB
PHP
64 lines
1.6 KiB
PHP
<?php
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/*
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* This file is part of Composer.
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*
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* (c) Nils Adermann <naderman@naderman.de>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Composer\DependencyResolver;
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/**
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* @author Nils Adermann <naderman@naderman.de>
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*/
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class DefaultPolicy implements PolicyInterface
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{
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public function allowUninstall()
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{
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return false;
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}
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public function allowDowngrade()
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{
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return false;
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}
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public function versionCompare(Package $a, Package $b, $operator)
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{
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return version_compare($a->getVersion(), $b->getVersion(), $operator);
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}
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public function findUpdatePackages(Solver $solver, Pool $pool, RepositoryInterface $repo, Package $package, $allowAll = false)
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{
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$packages = array();
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foreach ($pool->whatProvides($package->getName()) as $candidate) {
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// skip old packages unless downgrades are an option
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if (!$allowAll && !$this->allowDowngrade() && $this->versionCompare($package, $candidate, '>')) {
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continue;
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}
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if ($candidate != $package) {
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$packages[] = $candidate;
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}
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}
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return $packages;
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}
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public function installable(Solver $solver, Pool $pool, RepositoryInterface $repo, Package $package)
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{
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// todo: package blacklist?
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return true;
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}
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public function selectPreferedPackages(array $literals)
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{
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// todo: prefer installed, recommended, highest priority repository, ...
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return array($literals[0]);
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}
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}
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