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<?php
/*
* 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\AliasPackage;
use Composer\Package\BasePackage;
use Composer\Package\Package;
use Composer\Package\PackageInterface;
use Composer\Repository\PlatformRepository;
use Composer\Semver\Constraint\Constraint;
use Composer\Semver\Constraint\MultiConstraint;
/**
* @author Nils Adermann <naderman@naderman.de>
*/
class PoolBuilder
{
private $isPackageAcceptableCallable;
private $rootRequires;
private $rootAliases;
private $rootReferences;
private $aliasMap = array();
private $nameConstraints = array();
private $loadedNames = array();
private $packages = array();
public function __construct($isPackageAcceptableCallable, array $rootRequires = array())
{
$this->isPackageAcceptableCallable = $isPackageAcceptableCallable;
$this->rootRequires = $rootRequires;
}
public function buildPool(array $repositories, array $rootAliases, array $rootReferences, Request $request)
{
$pool = new Pool();
$this->rootAliases = $rootAliases;
$this->rootReferences = $rootReferences;
// TODO do we really want the request here? kind of want a root requirements thingy instead
$loadNames = array();
foreach ($request->getFixedPackages() as $package) {
$this->nameConstraints[$package->getName()] = null;
$this->loadedNames[$package->getName()] = true;
unset($loadNames[$package->getName()]);
$loadNames += $this->loadPackage($request, $package);
}
foreach ($request->getJobs() as $job) {
switch ($job['cmd']) {
case 'install':
if (isset($this->loadedNames[$job['packageName']])) {
continue 2;
}
// TODO currently lock above is always NULL if we adjust that, this needs to merge constraints
// TODO does it really make sense that we can have install requests for the same package that is actively locked with non-matching constraints?
// also see the solver-problems.test test case
$constraint = array_key_exists($job['packageName'], $loadNames) ? null : $job['constraint'];
$loadNames[$job['packageName']] = $constraint;
$this->nameConstraints[$job['packageName']] = $constraint ? new MultiConstraint(array($constraint), false) : null;
break;
}
}
while (!empty($loadNames)) {
foreach ($loadNames as $name => $void) {
$this->loadedNames[$name] = true;
}
$newLoadNames = array();
foreach ($repositories as $repository) {
// these repos have their packages fixed if they need to be loaded so we
// never need to load anything else from them
if ($repository instanceof PlatformRepository || $repository === $request->getLockedRepository()) {
continue;
}
// TODO should we really pass the callable into here?
$result = $repository->loadPackages($loadNames, $this->isPackageAcceptableCallable);
foreach ($result['namesFound'] as $name) {
// avoid loading the same package again from other repositories once it has been found
unset($loadNames[$name]);
}
foreach ($result['packages'] as $package) {
if (call_user_func($this->isPackageAcceptableCallable, $package->getNames(), $package->getStability())) {
$newLoadNames += $this->loadPackage($request, $package);
}
}
}
$loadNames = $newLoadNames;
}
// filter packages according to all the require statements collected for each package
foreach ($this->packages as $i => $package) {
// we check all alias related packages at once, so no need to check individual aliases
// isset also checks non-null value
if (!$package instanceof AliasPackage && isset($this->nameConstraints[$package->getName()])) {
$constraint = $this->nameConstraints[$package->getName()];
$aliasedPackages = array($i => $package);
if (isset($this->aliasMap[spl_object_hash($package)])) {
$aliasedPackages += $this->aliasMap[spl_object_hash($package)];
}
$found = false;
foreach ($aliasedPackages as $packageOrAlias) {
if ($constraint->matches(new Constraint('==', $packageOrAlias->getVersion()))) {
$found = true;
}
}
if (!$found) {
foreach ($aliasedPackages as $index => $packageOrAlias) {
unset($this->packages[$index]);
}
}
}
}
$pool->setPackages($this->packages);
unset($this->aliasMap);
unset($this->loadedNames);
unset($this->nameConstraints);
return $pool;
}
private function loadPackage(Request $request, PackageInterface $package)
{
$index = count($this->packages);
$this->packages[] = $package;
if ($package instanceof AliasPackage) {
$this->aliasMap[spl_object_hash($package->getAliasOf())][$index] = $package;
}
$name = $package->getName();
// we're simply setting the root references on all versions for a name here and rely on the solver to pick the
// right version. It'd be more work to figure out which versions and which aliases of those versions this may
// apply to
if (isset($this->rootReferences[$name])) {
// do not modify the references on already locked packages
if (!$request->isFixedPackage($package)) {
$package->setSourceDistReferences($this->rootReferences[$name]);
}
}
if (isset($this->rootAliases[$name][$package->getVersion()])) {
$alias = $this->rootAliases[$name][$package->getVersion()];
if ($package instanceof AliasPackage) {
$basePackage = $package->getAliasOf();
} else {
$basePackage = $package;
}
$aliasPackage = new AliasPackage($basePackage, $alias['alias_normalized'], $alias['alias']);
$aliasPackage->setRootPackageAlias(true);
$this->packages[] = $aliasPackage;
$this->aliasMap[spl_object_hash($aliasPackage->getAliasOf())][$index+1] = $aliasPackage;
}
$loadNames = array();
foreach ($package->getRequires() as $link) {
$require = $link->getTarget();
if (!isset($this->loadedNames[$require])) {
$loadNames[$require] = null;
}
if ($linkConstraint = $link->getConstraint()) {
if (!array_key_exists($require, $this->nameConstraints)) {
$this->nameConstraints[$require] = new MultiConstraint(array($linkConstraint), false);
} elseif ($this->nameConstraints[$require]) {
// TODO addConstraint function?
$this->nameConstraints[$require] = new MultiConstraint(array_merge(array($linkConstraint), $this->nameConstraints[$require]->getConstraints()), false);
}
// else it is null and should stay null
} else {
$this->nameConstraints[$require] = null;
}
}
return $loadNames;
}
}