Current File : //usr/share/php/Composer/DependencyResolver/RuleSetGenerator.php
<?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\PackageInterface;
use Composer\Package\AliasPackage;
use Composer\Repository\PlatformRepository;
/**
* @author Nils Adermann <naderman@naderman.de>
*/
class RuleSetGenerator
{
protected $policy;
protected $pool;
protected $rules;
protected $jobs;
protected $installedMap;
protected $whitelistedMap;
protected $addedMap;
protected $conflictAddedMap;
protected $addedPackages;
protected $addedPackagesByNames;
public function __construct(PolicyInterface $policy, Pool $pool)
{
$this->policy = $policy;
$this->pool = $pool;
}
/**
* Creates a new rule for the requirements of a package
*
* This rule is of the form (-A|B|C), where B and C are the providers of
* one requirement of the package A.
*
* @param PackageInterface $package The package with a requirement
* @param array $providers The providers of the requirement
* @param int $reason A RULE_* constant describing the
* reason for generating this rule
* @param mixed $reasonData Any data, e.g. the requirement name,
* that goes with the reason
* @return Rule|null The generated rule or null if tautological
*/
protected function createRequireRule(PackageInterface $package, array $providers, $reason, $reasonData = null)
{
$literals = array(-$package->id);
foreach ($providers as $provider) {
// self fulfilling rule?
if ($provider === $package) {
return null;
}
$literals[] = $provider->id;
}
return new GenericRule($literals, $reason, $reasonData);
}
/**
* Creates a rule to install at least one of a set of packages
*
* The rule is (A|B|C) with A, B and C different packages. If the given
* set of packages is empty an impossible rule is generated.
*
* @param array $packages The set of packages to choose from
* @param int $reason A RULE_* constant describing the reason for
* generating this rule
* @param array $job The job this rule was created from
* @return Rule The generated rule
*/
protected function createInstallOneOfRule(array $packages, $reason, $job)
{
$literals = array();
foreach ($packages as $package) {
$literals[] = $package->id;
}
return new GenericRule($literals, $reason, $job['packageName'], $job);
}
/**
* Creates a rule to remove a package
*
* The rule for a package A is (-A).
*
* @param PackageInterface $package The package to be removed
* @param int $reason A RULE_* constant describing the
* reason for generating this rule
* @param array $job The job this rule was created from
* @return Rule The generated rule
*/
protected function createRemoveRule(PackageInterface $package, $reason, $job)
{
return new GenericRule(array(-$package->id), $reason, $job['packageName'], $job);
}
/**
* Creates a rule for two conflicting packages
*
* The rule for conflicting packages A and B is (-A|-B). A is called the issuer
* and B the provider.
*
* @param PackageInterface $issuer The package declaring the conflict
* @param PackageInterface $provider The package causing the conflict
* @param int $reason A RULE_* constant describing the
* reason for generating this rule
* @param mixed $reasonData Any data, e.g. the package name, that
* goes with the reason
* @return Rule|null The generated rule
*/
protected function createRule2Literals(PackageInterface $issuer, PackageInterface $provider, $reason, $reasonData = null)
{
// ignore self conflict
if ($issuer === $provider) {
return null;
}
return new Rule2Literals(-$issuer->id, -$provider->id, $reason, $reasonData);
}
/**
* Adds a rule unless it duplicates an existing one of any type
*
* To be able to directly pass in the result of one of the rule creation
* methods null is allowed which will not insert a rule.
*
* @param int $type A TYPE_* constant defining the rule type
* @param Rule $newRule The rule about to be added
*/
private function addRule($type, Rule $newRule = null)
{
if (!$newRule) {
return;
}
$this->rules->add($newRule, $type);
}
protected function whitelistFromPackage(PackageInterface $package)
{
$workQueue = new \SplQueue;
$workQueue->enqueue($package);
while (!$workQueue->isEmpty()) {
$package = $workQueue->dequeue();
if (isset($this->whitelistedMap[$package->id])) {
continue;
}
$this->whitelistedMap[$package->id] = true;
foreach ($package->getRequires() as $link) {
$possibleRequires = $this->pool->whatProvides($link->getTarget(), $link->getConstraint(), true);
foreach ($possibleRequires as $require) {
$workQueue->enqueue($require);
}
}
$obsoleteProviders = $this->pool->whatProvides($package->getName(), null, true);
foreach ($obsoleteProviders as $provider) {
if ($provider === $package) {
continue;
}
if (($package instanceof AliasPackage) && $package->getAliasOf() === $provider) {
$workQueue->enqueue($provider);
}
}
}
}
protected function addRulesForPackage(PackageInterface $package, $ignorePlatformReqs)
{
$workQueue = new \SplQueue;
$workQueue->enqueue($package);
while (!$workQueue->isEmpty()) {
/** @var PackageInterface $package */
$package = $workQueue->dequeue();
if (isset($this->addedMap[$package->id])) {
continue;
}
$this->addedMap[$package->id] = true;
$this->addedPackages[] = $package;
foreach ($package->getNames() as $name) {
$this->addedPackagesByNames[$name][] = $package;
}
foreach ($package->getRequires() as $link) {
if ($ignorePlatformReqs && preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $link->getTarget())) {
continue;
}
$possibleRequires = $this->pool->whatProvides($link->getTarget(), $link->getConstraint());
$this->addRule(RuleSet::TYPE_PACKAGE, $this->createRequireRule($package, $possibleRequires, Rule::RULE_PACKAGE_REQUIRES, $link));
foreach ($possibleRequires as $require) {
$workQueue->enqueue($require);
}
}
$packageName = $package->getName();
$obsoleteProviders = $this->pool->whatProvides($packageName, null);
foreach ($obsoleteProviders as $provider) {
if ($provider === $package) {
continue;
}
if (($package instanceof AliasPackage) && $package->getAliasOf() === $provider) {
$this->addRule(RuleSet::TYPE_PACKAGE, $this->createRequireRule($package, array($provider), Rule::RULE_PACKAGE_ALIAS, $package));
} elseif (!$this->obsoleteImpossibleForAlias($package, $provider)) {
$reason = ($packageName == $provider->getName()) ? Rule::RULE_PACKAGE_SAME_NAME : Rule::RULE_PACKAGE_IMPLICIT_OBSOLETES;
$this->addRule(RuleSet::TYPE_PACKAGE, $this->createRule2Literals($package, $provider, $reason, $package));
}
}
}
}
protected function addConflictRules($ignorePlatformReqs = false)
{
/** @var PackageInterface $package */
foreach ($this->addedPackages as $package) {
foreach ($package->getConflicts() as $link) {
if (!isset($this->addedPackagesByNames[$link->getTarget()])) {
continue;
}
if ($ignorePlatformReqs && preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $link->getTarget())) {
continue;
}
/** @var PackageInterface $possibleConflict */
foreach ($this->addedPackagesByNames[$link->getTarget()] as $possibleConflict) {
$conflictMatch = $this->pool->match($possibleConflict, $link->getTarget(), $link->getConstraint(), true);
if ($conflictMatch === Pool::MATCH || $conflictMatch === Pool::MATCH_REPLACE) {
$this->addRule(RuleSet::TYPE_PACKAGE, $this->createRule2Literals($package, $possibleConflict, Rule::RULE_PACKAGE_CONFLICT, $link));
}
}
}
// check obsoletes and implicit obsoletes of a package
$isInstalled = isset($this->installedMap[$package->id]);
foreach ($package->getReplaces() as $link) {
if (!isset($this->addedPackagesByNames[$link->getTarget()])) {
continue;
}
/** @var PackageInterface $possibleConflict */
foreach ($this->addedPackagesByNames[$link->getTarget()] as $provider) {
if ($provider === $package) {
continue;
}
if (!$this->obsoleteImpossibleForAlias($package, $provider)) {
$reason = $isInstalled ? Rule::RULE_INSTALLED_PACKAGE_OBSOLETES : Rule::RULE_PACKAGE_OBSOLETES;
$this->addRule(RuleSet::TYPE_PACKAGE, $this->createRule2Literals($package, $provider, $reason, $link));
}
}
}
}
}
protected function obsoleteImpossibleForAlias($package, $provider)
{
$packageIsAlias = $package instanceof AliasPackage;
$providerIsAlias = $provider instanceof AliasPackage;
$impossible = (
($packageIsAlias && $package->getAliasOf() === $provider) ||
($providerIsAlias && $provider->getAliasOf() === $package) ||
($packageIsAlias && $providerIsAlias && $provider->getAliasOf() === $package->getAliasOf())
);
return $impossible;
}
protected function whitelistFromJobs()
{
foreach ($this->jobs as $job) {
switch ($job['cmd']) {
case 'install':
$packages = $this->pool->whatProvides($job['packageName'], $job['constraint'], true);
foreach ($packages as $package) {
$this->whitelistFromPackage($package);
}
break;
}
}
}
protected function addRulesForJobs($ignorePlatformReqs)
{
foreach ($this->jobs as $job) {
switch ($job['cmd']) {
case 'install':
if (!$job['fixed'] && $ignorePlatformReqs && preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $job['packageName'])) {
break;
}
$packages = $this->pool->whatProvides($job['packageName'], $job['constraint']);
if ($packages) {
foreach ($packages as $package) {
if (!isset($this->installedMap[$package->id])) {
$this->addRulesForPackage($package, $ignorePlatformReqs);
}
}
$rule = $this->createInstallOneOfRule($packages, Rule::RULE_JOB_INSTALL, $job);
$this->addRule(RuleSet::TYPE_JOB, $rule);
}
break;
case 'remove':
// remove all packages with this name including uninstalled
// ones to make sure none of them are picked as replacements
$packages = $this->pool->whatProvides($job['packageName'], $job['constraint']);
foreach ($packages as $package) {
$rule = $this->createRemoveRule($package, Rule::RULE_JOB_REMOVE, $job);
$this->addRule(RuleSet::TYPE_JOB, $rule);
}
break;
}
}
}
public function getRulesFor($jobs, $installedMap, $ignorePlatformReqs = false)
{
$this->jobs = $jobs;
$this->rules = new RuleSet;
$this->installedMap = $installedMap;
$this->whitelistedMap = array();
foreach ($this->installedMap as $package) {
$this->whitelistFromPackage($package);
}
$this->whitelistFromJobs();
$this->pool->setWhitelist($this->whitelistedMap);
$this->addedMap = array();
$this->conflictAddedMap = array();
$this->addedPackages = array();
$this->addedPackagesByNames = array();
foreach ($this->installedMap as $package) {
$this->addRulesForPackage($package, $ignorePlatformReqs);
}
$this->addRulesForJobs($ignorePlatformReqs);
$this->addConflictRules($ignorePlatformReqs);
// Remove references to packages
$this->addedPackages = $this->addedPackagesByNames = null;
return $this->rules;
}
}
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