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<?php declare(strict_types=1);
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* 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\BasePackage;
use Composer\Package\Version\VersionParser;
use Composer\Semver\CompilingMatcher;
use Composer\Semver\Constraint\ConstraintInterface;
use Composer\Semver\Constraint\Constraint;
/**
* A package pool contains all packages for dependency resolution
*
* @author Nils Adermann <naderman@naderman.de>
* @author Jordi Boggiano <j.boggiano@seld.be>
*/
class Pool implements \Countable
{
/** @var BasePackage[] */
protected $packages = [];
/** @var array<string, BasePackage[]> */
protected $packageByName = [];
/** @var VersionParser */
protected $versionParser;
/** @var array<string, array<string, BasePackage[]>> */
protected $providerCache = [];
/** @var BasePackage[] */
protected $unacceptableFixedOrLockedPackages;
/** @var array<string, array<string, string>> Map of package name => normalized version => pretty version */
protected $removedVersions = [];
/** @var array<string, array<string, string>> Map of package object hash => removed normalized versions => removed pretty version */
protected $removedVersionsByPackage = [];
/**
* @param BasePackage[] $packages
* @param BasePackage[] $unacceptableFixedOrLockedPackages
* @param array<string, array<string, string>> $removedVersions
* @param array<string, array<string, string>> $removedVersionsByPackage
*/
public function __construct(array $packages = [], array $unacceptableFixedOrLockedPackages = [], array $removedVersions = [], array $removedVersionsByPackage = [])
{
$this->versionParser = new VersionParser;
$this->setPackages($packages);
$this->unacceptableFixedOrLockedPackages = $unacceptableFixedOrLockedPackages;
$this->removedVersions = $removedVersions;
$this->removedVersionsByPackage = $removedVersionsByPackage;
}
/**
* @return array<string, string>
*/
public function getRemovedVersions(string $name, ConstraintInterface $constraint): array
{
if (!isset($this->removedVersions[$name])) {
return [];
}
$result = [];
foreach ($this->removedVersions[$name] as $version => $prettyVersion) {
if ($constraint->matches(new Constraint('==', $version))) {
$result[$version] = $prettyVersion;
}
}
return $result;
}
/**
* @return array<string, string>
*/
public function getRemovedVersionsByPackage(string $objectHash): array
{
if (!isset($this->removedVersionsByPackage[$objectHash])) {
return [];
}
return $this->removedVersionsByPackage[$objectHash];
}
/**
* @param BasePackage[] $packages
*/
private function setPackages(array $packages): void
{
$id = 1;
foreach ($packages as $package) {
$this->packages[] = $package;
$package->id = $id++;
foreach ($package->getNames() as $provided) {
$this->packageByName[$provided][] = $package;
}
}
}
/**
* @return BasePackage[]
*/
public function getPackages(): array
{
return $this->packages;
}
/**
* Retrieves the package object for a given package id.
*/
public function packageById(int $id): BasePackage
{
return $this->packages[$id - 1];
}
/**
* Returns how many packages have been loaded into the pool
*/
public function count(): int
{
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(string $name, ?ConstraintInterface $constraint = null): array
{
$key = (string) $constraint;
if (isset($this->providerCache[$name][$key])) {
return $this->providerCache[$name][$key];
}
return $this->providerCache[$name][$key] = $this->computeWhatProvides($name, $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[]
*/
private function computeWhatProvides(string $name, ?ConstraintInterface $constraint = null): array
{
if (!isset($this->packageByName[$name])) {
return [];
}
$matches = [];
foreach ($this->packageByName[$name] as $candidate) {
if ($this->match($candidate, $name, $constraint)) {
$matches[] = $candidate;
}
}
return $matches;
}
public function literalToPackage(int $literal): BasePackage
{
$packageId = abs($literal);
return $this->packageById($packageId);
}
/**
* @param array<int, BasePackage> $installedMap
*/
public function literalToPrettyString(int $literal, array $installedMap): string
{
$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 string $name Name of the package to be matched
*/
public function match(BasePackage $candidate, string $name, ?ConstraintInterface $constraint = null): bool
{
$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 $package): bool
{
return \in_array($package, $this->unacceptableFixedOrLockedPackages, true);
}
/**
* @return BasePackage[]
*/
public function getUnacceptableFixedOrLockedPackages(): array
{
return $this->unacceptableFixedOrLockedPackages;
}
public function __toString(): string
{
$str = "Pool:\n";
foreach ($this->packages as $package) {
$str .= '- '.str_pad((string) $package->id, 6, ' ', STR_PAD_LEFT).': '.$package->getName()."\n";
}
return $str;
}
}