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<?php /* * This file is part of Composer. * * (c) Nils Adermann <[email protected]> * Jordi Boggiano <[email protected]> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Composer\DependencyResolver; use Composer\Package\Version\VersionParser; use Composer\Semver\CompilingMatcher; use Composer\Semver\Constraint\ConstraintInterface; use Composer\Semver\Constraint\Constraint; use Composer\Package\BasePackage; /** * A package pool contains all packages for dependency resolution * * @author Nils Adermann <[email protected]> * @author Jordi Boggiano <[email protected]> */ class Pool implements \Countable { /** @var BasePackage[] */ protected $packages = array(); /** @var array<string, BasePackage[]> */ protected $packageByName = array(); protected $versionParser; protected $providerCache = array(); /** @var BasePackage[] */ protected $unacceptableFixedOrLockedPackages; public function __construct(array $packages = array(), array $unacceptableFixedOrLockedPackages = array()) { $this->versionParser = new VersionParser; $this->setPackages($packages); $this->unacceptableFixedOrLockedPackages = $unacceptableFixedOrLockedPackages; } private function setPackages(array $packages) { $id = 1; foreach ($packages as $package) { $this->packages[] = $package; $package->id = $id++; foreach ($package->getNames() as $provided) { $this->packageByName[$provided][] = $package; } } } /** * @return BasePackage[] */ public function getPackages() { return $this->packages; } /** * Retrieves the package object for a given package id. * * @param int $id * @return BasePackage */ public function packageById($id) { return $this->packages[$id - 1]; } /** * Returns how many packages have been loaded into the pool */ public function count() { return \count($this->packages); } /** * Searches all packages providing the given package name and match the constraint * * @param string $name The package name to be searched for * @param ConstraintInterface $constraint A constraint that all returned * packages must match or null to return all * @return BasePackage[] A set of packages */ public function whatProvides($name, ConstraintInterface $constraint = null) { $key = (string) $constraint; if (isset($this->providerCache[$name][$key])) { return $this->providerCache[$name][$key]; } return $this->providerCache[$name][$key] = $this->computeWhatProvides($name, $constraint); } /** * @see whatProvides */ private function computeWhatProvides($name, $constraint) { if (!isset($this->packageByName[$name])) { return array(); } $matches = array(); foreach ($this->packageByName[$name] as $candidate) { if ($this->match($candidate, $name, $constraint)) { $matches[] = $candidate; } } return $matches; } public function literalToPackage($literal) { $packageId = abs($literal); return $this->packageById($packageId); } public function literalToPrettyString($literal, $installedMap) { $package = $this->literalToPackage($literal); if (isset($installedMap[$package->id])) { $prefix = ($literal > 0 ? 'keep' : 'remove'); } else { $prefix = ($literal > 0 ? 'install' : 'don\'t install'); } return $prefix.' '.$package->getPrettyString(); } /** * Checks if the package matches the given constraint directly or through * provided or replaced packages * * @param BasePackage $candidate * @param string $name Name of the package to be matched * @param ConstraintInterface $constraint The constraint to verify * @return bool */ public function match(BasePackage $candidate, $name, ConstraintInterface $constraint = null) { $candidateName = $candidate->getName(); $candidateVersion = $candidate->getVersion(); if ($candidateName === $name) { return $constraint === null || CompilingMatcher::match($constraint, Constraint::OP_EQ, $candidateVersion); } $provides = $candidate->getProvides(); $replaces = $candidate->getReplaces(); // aliases create multiple replaces/provides for one target so they can not use the shortcut below if (isset($replaces[0]) || isset($provides[0])) { foreach ($provides as $link) { if ($link->getTarget() === $name && ($constraint === null || $constraint->matches($link->getConstraint()))) { return true; } } foreach ($replaces as $link) { if ($link->getTarget() === $name && ($constraint === null || $constraint->matches($link->getConstraint()))) { return true; } } return false; } if (isset($provides[$name]) && ($constraint === null || $constraint->matches($provides[$name]->getConstraint()))) { return true; } if (isset($replaces[$name]) && ($constraint === null || $constraint->matches($replaces[$name]->getConstraint()))) { return true; } return false; } public function isUnacceptableFixedOrLockedPackage(BasePackage $package) { return \in_array($package, $this->unacceptableFixedOrLockedPackages, true); } public function __toString() { $str = "Pool:\n"; foreach ($this->packages as $package) { $str .= '- '.str_pad($package->id, 6, ' ', STR_PAD_LEFT).': '.$package->getName()."\n"; } return $str; } }