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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;

use
Composer\Autoload\AutoloadGenerator;
use
Composer\DependencyResolver\DefaultPolicy;
use
Composer\DependencyResolver\Operation\UpdateOperation;
use
Composer\DependencyResolver\Operation\InstallOperation;
use
Composer\DependencyResolver\Operation\UninstallOperation;
use
Composer\DependencyResolver\Operation\MarkAliasUninstalledOperation;
use
Composer\DependencyResolver\Operation\OperationInterface;
use
Composer\DependencyResolver\PolicyInterface;
use
Composer\DependencyResolver\Pool;
use
Composer\DependencyResolver\Request;
use
Composer\DependencyResolver\Rule;
use
Composer\DependencyResolver\Solver;
use
Composer\DependencyResolver\SolverProblemsException;
use
Composer\Downloader\DownloadManager;
use
Composer\EventDispatcher\EventDispatcher;
use
Composer\Installer\InstallationManager;
use
Composer\Installer\InstallerEvents;
use
Composer\Installer\NoopInstaller;
use
Composer\Installer\SuggestedPackagesReporter;
use
Composer\IO\IOInterface;
use
Composer\Package\AliasPackage;
use
Composer\Package\BasePackage;
use
Composer\Package\CompletePackage;
use
Composer\Package\CompletePackageInterface;
use
Composer\Package\Link;
use
Composer\Package\Loader\ArrayLoader;
use
Composer\Package\Dumper\ArrayDumper;
use
Composer\Semver\Constraint\Constraint;
use
Composer\Package\Locker;
use
Composer\Package\PackageInterface;
use
Composer\Package\RootPackageInterface;
use
Composer\Repository\CompositeRepository;
use
Composer\Repository\InstalledArrayRepository;
use
Composer\Repository\PlatformRepository;
use
Composer\Repository\RepositoryInterface;
use
Composer\Repository\RepositoryManager;
use
Composer\Repository\WritableRepositoryInterface;
use
Composer\Script\ScriptEvents;

/**
 * @author Jordi Boggiano <j.boggiano@seld.be>
 * @author Beau Simensen <beau@dflydev.com>
 * @author Konstantin Kudryashov <ever.zet@gmail.com>
 * @author Nils Adermann <naderman@naderman.de>
 */
class Installer
{
   
/**
     * @var IOInterface
     */
   
protected $io;

   
/**
     * @var Config
     */
   
protected $config;

   
/**
     * @var RootPackageInterface
     */
   
protected $package;

   
/**
     * @var DownloadManager
     */
   
protected $downloadManager;

   
/**
     * @var RepositoryManager
     */
   
protected $repositoryManager;

   
/**
     * @var Locker
     */
   
protected $locker;

   
/**
     * @var InstallationManager
     */
   
protected $installationManager;

   
/**
     * @var EventDispatcher
     */
   
protected $eventDispatcher;

   
/**
     * @var AutoloadGenerator
     */
   
protected $autoloadGenerator;

    protected
$preferSource = false;
    protected
$preferDist = false;
    protected
$optimizeAutoloader = false;
    protected
$classMapAuthoritative = false;
    protected
$apcuAutoloader = false;
    protected
$devMode = false;
    protected
$dryRun = false;
    protected
$verbose = false;
    protected
$update = false;
    protected
$dumpAutoloader = true;
    protected
$runScripts = true;
    protected
$ignorePlatformReqs = false;
    protected
$preferStable = false;
    protected
$preferLowest = false;
    protected
$skipSuggest = false;
    protected
$writeLock;
    protected
$executeOperations = true;

   
/**
     * Array of package names/globs flagged for update
     *
     * @var array|null
     */
   
protected $updateWhitelist = null; // TODO 2.0 rename to updateAllowList
   
protected $whitelistDependencies = false; // TODO 2.0 rename to allowListTransitiveDependencies
   
protected $whitelistAllDependencies = false; // TODO 2.0 rename to allowListAllDependencies

    /**
     * @var SuggestedPackagesReporter
     */
   
protected $suggestedPackagesReporter;

   
/**
     * @var RepositoryInterface
     */
   
protected $additionalInstalledRepository;

   
/**
     * Constructor
     *
     * @param IOInterface          $io
     * @param Config               $config
     * @param RootPackageInterface $package
     * @param DownloadManager      $downloadManager
     * @param RepositoryManager    $repositoryManager
     * @param Locker               $locker
     * @param InstallationManager  $installationManager
     * @param EventDispatcher      $eventDispatcher
     * @param AutoloadGenerator    $autoloadGenerator
     */
   
public function __construct(IOInterface $io, Config $config, RootPackageInterface $package, DownloadManager $downloadManager, RepositoryManager $repositoryManager, Locker $locker, InstallationManager $installationManager, EventDispatcher $eventDispatcher, AutoloadGenerator $autoloadGenerator)
    {
       
$this->io = $io;
       
$this->config = $config;
       
$this->package = $package;
       
$this->downloadManager = $downloadManager;
       
$this->repositoryManager = $repositoryManager;
       
$this->locker = $locker;
       
$this->installationManager = $installationManager;
       
$this->eventDispatcher = $eventDispatcher;
       
$this->autoloadGenerator = $autoloadGenerator;

       
$this->writeLock = $config->get('lock');
    }

   
/**
     * Run installation (or update)
     *
     * @throws \Exception
     * @return int        0 on success or a positive error code on failure
     */
   
public function run()
    {
       
// Disable GC to save CPU cycles, as the dependency solver can create hundreds of thousands
        // of PHP objects, the GC can spend quite some time walking the tree of references looking
        // for stuff to collect while there is nothing to collect. This slows things down dramatically
        // and turning it off results in much better performance. Do not try this at home however.
       
gc_collect_cycles();
       
gc_disable();

       
// Force update if there is no lock file present
       
if (!$this->update && !$this->locker->isLocked()) {
           
$this->update = true;
        }

        if (
$this->dryRun) {
           
$this->verbose = true;
           
$this->runScripts = false;
           
$this->executeOperations = false;
           
$this->writeLock = false;
           
$this->dumpAutoloader = false;
           
$this->installationManager->addInstaller(new NoopInstaller);
           
$this->mockLocalRepositories($this->repositoryManager);
        }

        if (
$this->runScripts) {
           
$_SERVER['COMPOSER_DEV_MODE'] = $this->devMode ? '1' : '0';
           
putenv('COMPOSER_DEV_MODE='.$_SERVER['COMPOSER_DEV_MODE']);

           
// dispatch pre event
           
$eventName = $this->update ? ScriptEvents::PRE_UPDATE_CMD : ScriptEvents::PRE_INSTALL_CMD;
           
$this->eventDispatcher->dispatchScript($eventName, $this->devMode);
        }

       
$this->downloadManager->setPreferSource($this->preferSource);
       
$this->downloadManager->setPreferDist($this->preferDist);

       
// create installed repo, this contains all local packages + platform packages (php & extensions)
       
$localRepo = $this->repositoryManager->getLocalRepository();
        if (
$this->update) {
           
$platformOverrides = $this->config->get('platform') ?: array();
        } else {
           
$platformOverrides = $this->locker->getPlatformOverrides();
        }
       
$platformRepo = new PlatformRepository(array(), $platformOverrides);
       
$installedRepo = $this->createInstalledRepo($localRepo, $platformRepo);

       
$aliases = $this->getRootAliases();
       
$this->aliasPlatformPackages($platformRepo, $aliases);

        if (!
$this->suggestedPackagesReporter) {
           
$this->suggestedPackagesReporter = new SuggestedPackagesReporter($this->io);
        }

        try {
            list(
$res, $devPackages) = $this->doInstall($localRepo, $installedRepo, $platformRepo, $aliases);
            if (
$res !== 0) {
                return
$res;
            }
        } catch (\
Exception $e) {
            if (
$this->executeOperations && $this->config->get('notify-on-install')) {
               
$this->installationManager->notifyInstalls($this->io);
            }

            throw
$e;
        }
        if (
$this->executeOperations && $this->config->get('notify-on-install')) {
           
$this->installationManager->notifyInstalls($this->io);
        }

       
// output suggestions if we're in dev mode
       
if ($this->devMode && !$this->skipSuggest) {
           
$this->suggestedPackagesReporter->output($installedRepo);
        }

       
# Find abandoned packages and warn user
       
foreach ($localRepo->getPackages() as $package) {
            if (!
$package instanceof CompletePackage || !$package->isAbandoned()) {
                continue;
            }

           
$replacement = is_string($package->getReplacementPackage())
                ?
'Use ' . $package->getReplacementPackage() . ' instead'
               
: 'No replacement was suggested';

           
$this->io->writeError(
               
sprintf(
                   
"<warning>Package %s is abandoned, you should avoid using it. %s.</warning>",
                   
$package->getPrettyName(),
                   
$replacement
               
)
            );
        }

       
// write lock
       
if ($this->update && $this->writeLock) {
           
$localRepo->reload();

           
$platformReqs = $this->extractPlatformRequirements($this->package->getRequires());
           
$platformDevReqs = $this->extractPlatformRequirements($this->package->getDevRequires());

           
$updatedLock = $this->locker->setLockData(
               
array_diff($localRepo->getCanonicalPackages(), $devPackages),
               
$devPackages,
               
$platformReqs,
               
$platformDevReqs,
               
$aliases,
               
$this->package->getMinimumStability(),
               
$this->package->getStabilityFlags(),
               
$this->preferStable || $this->package->getPreferStable(),
               
$this->preferLowest,
               
$this->config->get('platform') ?: array()
            );
            if (
$updatedLock) {
               
$this->io->writeError('<info>Writing lock file</info>');
            }
        }

        if (
$this->dumpAutoloader) {
           
// write autoloader
           
if ($this->optimizeAutoloader) {
               
$this->io->writeError('<info>Generating optimized autoload files</info>');
            } else {
               
$this->io->writeError('<info>Generating autoload files</info>');
            }

           
$this->autoloadGenerator->setDevMode($this->devMode);
           
$this->autoloadGenerator->setClassMapAuthoritative($this->classMapAuthoritative);
           
$this->autoloadGenerator->setApcu($this->apcuAutoloader);
           
$this->autoloadGenerator->setRunScripts($this->runScripts);
           
$this->autoloadGenerator->dump($this->config, $localRepo, $this->package, $this->installationManager, 'composer', $this->optimizeAutoloader);
        }

        if (
$this->executeOperations) {
           
// force binaries re-generation in case they are missing
           
foreach ($localRepo->getPackages() as $package) {
               
$this->installationManager->ensureBinariesPresence($package);
            }
        }

       
$fundingCount = 0;
        foreach (
$localRepo->getPackages() as $package) {
            if (
$package instanceof CompletePackageInterface && !$package instanceof AliasPackage && $package->getFunding()) {
               
$fundingCount++;
            }
        }
        if (
$fundingCount) {
           
$this->io->writeError(array(
               
sprintf(
                   
"<info>%d package%s you are using %s looking for funding.</info>",
                   
$fundingCount,
                   
1 === $fundingCount ? '' : 's',
                   
1 === $fundingCount ? 'is' : 'are'
               
),
               
'<info>Use the `composer fund` command to find out more!</info>',
            ));
        }

        if (
$this->runScripts) {
           
// dispatch post event
           
$eventName = $this->update ? ScriptEvents::POST_UPDATE_CMD : ScriptEvents::POST_INSTALL_CMD;
           
$this->eventDispatcher->dispatchScript($eventName, $this->devMode);
        }

       
// re-enable GC except on HHVM which triggers a warning here
       
if (!defined('HHVM_VERSION')) {
           
gc_enable();
        }

        return
0;
    }

   
/**
     * @param  RepositoryInterface $localRepo
     * @param  RepositoryInterface $installedRepo
     * @param  PlatformRepository  $platformRepo
     * @param  array               $aliases
     * @return array               [int, PackageInterfaces[]|null] with the exit code and an array of dev packages on update, or null on install
     */
   
protected function doInstall($localRepo, $installedRepo, $platformRepo, $aliases)
    {
       
// init vars
       
$lockedRepository = null;
       
$repositories = null;

       
// initialize locked repo if we are installing from lock or in a partial update
        // and a lock file is present as we need to force install non-allowed lock file
        // packages in that case
       
if (!$this->update || (!empty($this->updateWhitelist) && $this->locker->isLocked())) {
            try {
               
$lockedRepository = $this->locker->getLockedRepository($this->devMode);
            } catch (\
RuntimeException $e) {
               
// if there are dev requires, then we really can not install
               
if ($this->package->getDevRequires()) {
                    throw
$e;
                }
               
// no require-dev in composer.json and the lock file was created with no dev info, so skip them
               
$lockedRepository = $this->locker->getLockedRepository();
            }
        }

       
$this->allowListUpdateDependencies(
           
$lockedRepository ?: $localRepo,
           
$this->package->getRequires(),
           
$this->package->getDevRequires()
        );

       
$this->io->writeError('<info>Loading composer repositories with package information</info>');

       
// creating repository pool
       
$policy = $this->createPolicy();
       
$pool = $this->createPool($this->update ? null : $lockedRepository);
       
$pool->addRepository($installedRepo, $aliases);
        if (
$this->update) {
           
$repositories = $this->repositoryManager->getRepositories();
            foreach (
$repositories as $repository) {
               
$pool->addRepository($repository, $aliases);
            }
        }
       
// Add the locked repository after the others in case we are doing a
        // partial update so missing packages can be found there still.
        // For installs from lock it's the only one added so it is first
       
if ($lockedRepository) {
           
$pool->addRepository($lockedRepository, $aliases);
        }

       
// creating requirements request
       
$request = $this->createRequest($this->package, $platformRepo);

        if (
$this->update) {
           
// remove unstable packages from the localRepo if they don't match the current stability settings
           
$removedUnstablePackages = array();
            foreach (
$localRepo->getPackages() as $package) {
                if (
                    !
$pool->isPackageAcceptable($package->getNames(), $package->getStability())
                    &&
$this->installationManager->isPackageInstalled($localRepo, $package)
                ) {
                   
$removedUnstablePackages[$package->getName()] = true;
                   
$request->remove($package->getName(), new Constraint('=', $package->getVersion()));
                }
            }

           
$this->io->writeError('<info>Updating dependencies'.($this->devMode ? ' (including require-dev)' : '').'</info>');

           
$request->updateAll();

           
$links = array_merge($this->package->getRequires(), $this->package->getDevRequires());

            foreach (
$links as $link) {
               
$request->install($link->getTarget(), $link->getConstraint());
            }

           
// if the updateWhitelist is enabled, packages not in it are also fixed
            // to the version specified in the lock, or their currently installed version
           
if ($this->updateWhitelist) {
               
$currentPackages = $this->getCurrentPackages($installedRepo);

               
// collect packages to fixate from root requirements as well as installed packages
               
$candidates = array();
                foreach (
$links as $link) {
                   
$candidates[$link->getTarget()] = true;
                   
$rootRequires[$link->getTarget()] = $link;
                }
                foreach (
$currentPackages as $package) {
                   
$candidates[$package->getName()] = true;
                }

               
// fix them to the version in lock (or currently installed) if they are not updateable
               
foreach ($candidates as $candidate => $dummy) {
                    foreach (
$currentPackages as $curPackage) {
                        if (
$curPackage->getName() === $candidate) {
                            if (!
$this->isUpdateable($curPackage) && !isset($removedUnstablePackages[$curPackage->getName()])) {
                               
$constraint = new Constraint('=', $curPackage->getVersion());
                               
$description = $this->locker->isLocked() ? '(locked at' : '(installed at';
                               
$requiredAt = isset($rootRequires[$candidate]) ? ', required as ' . $rootRequires[$candidate]->getPrettyConstraint() : '';
                               
$constraint->setPrettyString($description . ' ' . $curPackage->getPrettyVersion() . $requiredAt . ')');
                               
$request->install($curPackage->getName(), $constraint);
                            }
                            break;
                        }
                    }
                }
            }
        } else {
           
$this->io->writeError('<info>Installing dependencies'.($this->devMode ? ' (including require-dev)' : '').' from lock file</info>');

            if (!
$this->locker->isFresh()) {
               
$this->io->writeError('<warning>Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. It is recommended that you run `composer update` or `composer update <package name>`.</warning>', true, IOInterface::QUIET);
            }

            foreach (
$lockedRepository->getPackages() as $package) {
               
$version = $package->getVersion();
                if (isset(
$aliases[$package->getName()][$version])) {
                   
$version = $aliases[$package->getName()][$version]['alias_normalized'];
                }
               
$constraint = new Constraint('=', $version);
               
$constraint->setPrettyString($package->getPrettyVersion());
               
$request->install($package->getName(), $constraint);
            }

            foreach (
$this->locker->getPlatformRequirements($this->devMode) as $link) {
               
$request->install($link->getTarget(), $link->getConstraint());
            }
        }

       
// force dev packages to have the latest links if we update or install from a (potentially new) lock
       
$this->processDevPackages($localRepo, $pool, $policy, $repositories, $installedRepo, $lockedRepository, 'force-links');

       
// solve dependencies
       
$this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::PRE_DEPENDENCIES_SOLVING, $this->devMode, $policy, $pool, $installedRepo, $request);
       
$solver = new Solver($policy, $pool, $installedRepo, $this->io);
        try {
           
$operations = $solver->solve($request, $this->ignorePlatformReqs);
           
$ruleSetSize = $solver->getRuleSetSize();
           
$solver = null;
        } catch (
SolverProblemsException $e) {
           
$this->io->writeError('<error>Your requirements could not be resolved to an installable set of packages.</error>', true, IOInterface::QUIET);
           
$this->io->writeError($e->getMessage());
            if (
$this->update && !$this->devMode) {
               
$this->io->writeError('<warning>Running update with --no-dev does not mean require-dev is ignored, it just means the packages will not be installed. If dev requirements are blocking the update you have to resolve those problems.</warning>', true, IOInterface::QUIET);
            }

            return array(
max(1, $e->getCode()), array());
        }

       
// force dev packages to be updated if we update or install from a (potentially new) lock
       
$operations = $this->processDevPackages($localRepo, $pool, $policy, $repositories, $installedRepo, $lockedRepository, 'force-updates', $operations);

       
$this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::POST_DEPENDENCIES_SOLVING, $this->devMode, $policy, $pool, $installedRepo, $request, $operations);

       
$this->io->writeError("Analyzed ".count($pool)." packages to resolve dependencies", true, IOInterface::VERBOSE);
       
$this->io->writeError("Analyzed ".$ruleSetSize." rules to resolve dependencies", true, IOInterface::VERBOSE);

       
// execute operations
       
if (!$operations) {
           
$this->io->writeError('Nothing to install or update');
        }

       
$operations = $this->movePluginsToFront($operations);
       
$operations = $this->moveUninstallsToFront($operations);

       
// extract dev packages and mark them to be skipped if it's a --no-dev install or update
        // we also force them to be uninstalled if they are present in the local repo
       
if ($this->update) {
           
$devPackages = $this->extractDevPackages($operations, $localRepo, $platformRepo, $aliases);
            if (!
$this->devMode) {
               
$operations = $this->filterDevPackageOperations($devPackages, $operations, $localRepo);
            }
        } else {
           
$devPackages = null;
        }

        if (
$operations) {
           
$installs = $updates = $uninstalls = array();
            foreach (
$operations as $operation) {
                if (
$operation instanceof InstallOperation) {
                   
$installs[] = $operation->getPackage()->getPrettyName().':'.$operation->getPackage()->getFullPrettyVersion();
                } elseif (
$operation instanceof UpdateOperation) {
                   
$updates[] = $operation->getTargetPackage()->getPrettyName().':'.$operation->getTargetPackage()->getFullPrettyVersion();
                } elseif (
$operation instanceof UninstallOperation) {
                   
$uninstalls[] = $operation->getPackage()->getPrettyName();
                }
            }

           
$this->io->writeError(sprintf(
               
"<info>Package operations: %d install%s, %d update%s, %d removal%s</info>",
               
count($installs),
               
1 === count($installs) ? '' : 's',
               
count($updates),
               
1 === count($updates) ? '' : 's',
               
count($uninstalls),
               
1 === count($uninstalls) ? '' : 's'
           
));
            if (
$installs) {
               
$this->io->writeError("Installs: ".implode(', ', $installs), true, IOInterface::VERBOSE);
            }
            if (
$updates) {
               
$this->io->writeError("Updates: ".implode(', ', $updates), true, IOInterface::VERBOSE);
            }
            if (
$uninstalls) {
               
$this->io->writeError("Removals: ".implode(', ', $uninstalls), true, IOInterface::VERBOSE);
            }
        }

        foreach (
$operations as $operation) {
           
// collect suggestions
           
$jobType = $operation->getJobType();
            if (
'install' === $jobType) {
               
$this->suggestedPackagesReporter->addSuggestionsFromPackage($operation->getPackage());
            }

           
// updating, force dev packages' references if they're in root package refs
           
if ($this->update) {
               
$package = null;
                if (
'update' === $jobType) {
                   
$package = $operation->getTargetPackage();
                } elseif (
'install' === $jobType) {
                   
$package = $operation->getPackage();
                }
                if (
$package && $package->isDev()) {
                   
$references = $this->package->getReferences();
                    if (isset(
$references[$package->getName()])) {
                       
$this->updateInstallReferences($package, $references[$package->getName()]);
                    }
                }
                if (
'update' === $jobType) {
                   
$targetPackage = $operation->getTargetPackage();
                    if (
$targetPackage->isDev()) {
                       
$initialPackage = $operation->getInitialPackage();
                        if (
$targetPackage->getVersion() === $initialPackage->getVersion()
                            && (!
$targetPackage->getSourceReference() || $targetPackage->getSourceReference() === $initialPackage->getSourceReference())
                            && (!
$targetPackage->getDistReference() || $targetPackage->getDistReference() === $initialPackage->getDistReference())
                        ) {
                           
$this->io->writeError('  - Skipping update of ' . $targetPackage->getPrettyName() . ' to the same reference-locked version', true, IOInterface::DEBUG);
                           
$this->io->writeError('', true, IOInterface::DEBUG);

                            continue;
                        }
                    }
                }
            }

           
$event = 'Composer\Installer\PackageEvents::PRE_PACKAGE_'.strtoupper($jobType);
            if (
defined($event) && $this->runScripts) {
               
$this->eventDispatcher->dispatchPackageEvent(constant($event), $this->devMode, $policy, $pool, $installedRepo, $request, $operations, $operation);
            }

           
// output non-alias ops when not executing operations (i.e. dry run), output alias ops in debug verbosity
           
if (!$this->executeOperations && false === strpos($operation->getJobType(), 'Alias')) {
               
$this->io->writeError('  - ' . $operation);
            } elseif (
$this->io->isDebug() && false !== strpos($operation->getJobType(), 'Alias')) {
               
$this->io->writeError('  - ' . $operation);
            }

           
$this->installationManager->execute($localRepo, $operation);

           
// output reasons why the operation was ran, only for install/update operations
           
if ($this->verbose && $this->io->isVeryVerbose() && in_array($jobType, array('install', 'update'))) {
               
$reason = $operation->getReason();
                if (
$reason instanceof Rule) {
                    switch (
$reason->getReason()) {
                        case
Rule::RULE_JOB_INSTALL:
                           
$this->io->writeError('    REASON: Required by the root package: '.$reason->getPrettyString($pool));
                           
$this->io->writeError('');
                            break;
                        case
Rule::RULE_PACKAGE_REQUIRES:
                           
$this->io->writeError('    REASON: '.$reason->getPrettyString($pool));
                           
$this->io->writeError('');
                            break;
                    }
                }
            }

            if (
$this->executeOperations || $this->writeLock) {
               
$localRepo->write();
            }

           
$event = 'Composer\Installer\PackageEvents::POST_PACKAGE_'.strtoupper($jobType);
            if (
defined($event) && $this->runScripts) {
               
$this->eventDispatcher->dispatchPackageEvent(constant($event), $this->devMode, $policy, $pool, $installedRepo, $request, $operations, $operation);
            }
        }

        if (
$this->executeOperations) {
           
// force source/dist urls to be updated for all packages
           
$this->processPackageUrls($pool, $policy, $localRepo, $repositories);
           
$localRepo->write();
        }

       
// see https://github.com/composer/composer/issues/2764
       
if ($operations) {
           
$vendorDir = $this->config->get('vendor-dir');
            if (
is_dir($vendorDir)) {
               
// suppress errors as this fails sometimes on OSX for no apparent reason
                // see https://github.com/composer/composer/issues/4070#issuecomment-129792748
               
@touch($vendorDir);
            }
        }

        return array(
0, $devPackages);
    }

   
/**
     * Extracts the dev packages out of the localRepo
     *
     * This works by faking the operations so we can see what the dev packages
     * would be at the end of the operation execution. This lets us then remove
     * the dev packages from the list of operations accordingly if we are in a
     * --no-dev install or update.
     *
     * @return array
     */
   
private function extractDevPackages(array $operations, RepositoryInterface $localRepo, PlatformRepository $platformRepo, array $aliases)
    {
        if (!
$this->package->getDevRequires()) {
            return array();
        }

       
// fake-apply all operations to this clone of the local repo so we see the complete set of package we would end up with
       
$tempLocalRepo = clone $localRepo;
        foreach (
$operations as $operation) {
            switch (
$operation->getJobType()) {
                case
'install':
                case
'markAliasInstalled':
                    if (!
$tempLocalRepo->hasPackage($operation->getPackage())) {
                       
$tempLocalRepo->addPackage(clone $operation->getPackage());
                    }
                    break;

                case
'uninstall':
                case
'markAliasUninstalled':
                   
$tempLocalRepo->removePackage($operation->getPackage());
                    break;

                case
'update':
                   
$tempLocalRepo->removePackage($operation->getInitialPackage());
                    if (!
$tempLocalRepo->hasPackage($operation->getTargetPackage())) {
                       
$tempLocalRepo->addPackage(clone $operation->getTargetPackage());
                    }
                    break;

                default:
                    throw new \
LogicException('Unknown type: '.$operation->getJobType());
            }
        }

       
// we have to reload the local repo to handle aliases properly
        // but as it is not persisted on disk we use a loader/dumper
        // to reload it in memory
       
$localRepo = new InstalledArrayRepository(array());
       
$loader = new ArrayLoader(null, true);
       
$dumper = new ArrayDumper();
        foreach (
$tempLocalRepo->getCanonicalPackages() as $pkg) {
           
$localRepo->addPackage($loader->load($dumper->dump($pkg)));
        }
        unset(
$tempLocalRepo, $loader, $dumper);

       
$policy = $this->createPolicy();
       
$pool = $this->createPool();
       
$installedRepo = $this->createInstalledRepo($localRepo, $platformRepo);
       
$pool->addRepository($installedRepo, $aliases);

       
// creating requirements request without dev requirements
       
$request = $this->createRequest($this->package, $platformRepo);
       
$request->updateAll();
        foreach (
$this->package->getRequires() as $link) {
           
$request->install($link->getTarget(), $link->getConstraint());
        }

       
// solve deps to see which get removed
       
$this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::PRE_DEPENDENCIES_SOLVING, false, $policy, $pool, $installedRepo, $request);
       
$solver = new Solver($policy, $pool, $installedRepo, $this->io);
       
$ops = $solver->solve($request, $this->ignorePlatformReqs);
       
$this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::POST_DEPENDENCIES_SOLVING, false, $policy, $pool, $installedRepo, $request, $ops);

       
$devPackages = array();
        foreach (
$ops as $op) {
            if (
$op->getJobType() === 'uninstall') {
               
$devPackages[] = $op->getPackage();
            }
        }

        return
$devPackages;
    }

   
/**
     * @return OperationInterface[] filtered operations, dev packages are uninstalled and all operations on them ignored
     */
   
private function filterDevPackageOperations(array $devPackages, array $operations, RepositoryInterface $localRepo)
    {
       
$finalOps = array();
       
$packagesToSkip = array();
        foreach (
$devPackages as $pkg) {
           
$packagesToSkip[$pkg->getName()] = true;
            if (
$installedDevPkg = $localRepo->findPackage($pkg->getName(), '*')) {
                if (
$installedDevPkg instanceof AliasPackage) {
                   
$finalOps[] = new MarkAliasUninstalledOperation($installedDevPkg, 'non-dev install removing it');
                   
$installedDevPkg = $installedDevPkg->getAliasOf();
                }
               
$finalOps[] = new UninstallOperation($installedDevPkg, 'non-dev install removing it');
            }
        }

       
// skip operations applied on dev packages
       
foreach ($operations as $op) {
           
$package = $op->getJobType() === 'update' ? $op->getTargetPackage() : $op->getPackage();
            if (isset(
$packagesToSkip[$package->getName()])) {
                continue;
            }

           
$finalOps[] = $op;
        }

        return
$finalOps;
    }

   
/**
     * Workaround: if your packages depend on plugins, we must be sure
     * that those are installed / updated first; else it would lead to packages
     * being installed multiple times in different folders, when running Composer
     * twice.
     *
     * While this does not fix the root-causes of https://github.com/composer/composer/issues/1147,
     * it at least fixes the symptoms and makes usage of composer possible (again)
     * in such scenarios.
     *
     * @param  OperationInterface[] $operations
     * @return OperationInterface[] reordered operation list
     */
   
private function movePluginsToFront(array $operations)
    {
       
$pluginsNoDeps = array();
       
$pluginsWithDeps = array();
       
$pluginRequires = array();

        foreach (
array_reverse($operations, true) as $idx => $op) {
            if (
$op instanceof InstallOperation) {
               
$package = $op->getPackage();
            } elseif (
$op instanceof UpdateOperation) {
               
$package = $op->getTargetPackage();
            } else {
                continue;
            }

           
// is this package a plugin?
           
$isPlugin = $package->getType() === 'composer-plugin' || $package->getType() === 'composer-installer';

           
// is this a plugin or a dependency of a plugin?
           
if ($isPlugin || count(array_intersect($package->getNames(), $pluginRequires))) {
               
// get the package's requires, but filter out any platform requirements or 'composer-plugin-api'
               
$requires = array_filter(array_keys($package->getRequires()), function ($req) {
                    return
$req !== 'composer-plugin-api' && !preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $req);
                });

               
// is this a plugin with no meaningful dependencies?
               
if ($isPlugin && !count($requires)) {
                   
// plugins with no dependencies go to the very front
                   
array_unshift($pluginsNoDeps, $op);
                } else {
                   
// capture the requirements for this package so those packages will be moved up as well
                   
$pluginRequires = array_merge($pluginRequires, $requires);
                   
// move the operation to the front
                   
array_unshift($pluginsWithDeps, $op);
                }

                unset(
$operations[$idx]);
            }
        }

        return
array_merge($pluginsNoDeps, $pluginsWithDeps, $operations);
    }

   
/**
     * Removals of packages should be executed before installations in
     * case two packages resolve to the same path (due to custom installers)
     *
     * @param  OperationInterface[] $operations
     * @return OperationInterface[] reordered operation list
     */
   
private function moveUninstallsToFront(array $operations)
    {
       
$uninstOps = array();
        foreach (
$operations as $idx => $op) {
            if (
$op instanceof UninstallOperation) {
               
$uninstOps[] = $op;
                unset(
$operations[$idx]);
            }
        }

        return
array_merge($uninstOps, $operations);
    }

   
/**
     * @return RepositoryInterface
     */
   
private function createInstalledRepo(RepositoryInterface $localRepo, PlatformRepository $platformRepo)
    {
       
// clone root package to have one in the installed repo that does not require anything
        // we don't want it to be uninstallable, but its requirements should not conflict
        // with the lock file for example
       
$installedRootPackage = clone $this->package;
       
$installedRootPackage->setRequires(array());
       
$installedRootPackage->setDevRequires(array());

       
$repos = array(
           
$localRepo,
            new
InstalledArrayRepository(array($installedRootPackage)),
           
$platformRepo,
        );
       
$installedRepo = new CompositeRepository($repos);
        if (
$this->additionalInstalledRepository) {
           
$installedRepo->addRepository($this->additionalInstalledRepository);
        }

        return
$installedRepo;
    }

   
/**
     * @param  RepositoryInterface|null $lockedRepository
     * @return Pool
     */
   
private function createPool(RepositoryInterface $lockedRepository = null)
    {
        if (
$this->update) {
           
$minimumStability = $this->package->getMinimumStability();
           
$stabilityFlags = $this->package->getStabilityFlags();

           
$requires = array_merge($this->package->getRequires(), $this->package->getDevRequires());
        } else {
           
$minimumStability = $this->locker->getMinimumStability();
           
$stabilityFlags = $this->locker->getStabilityFlags();

           
$requires = array();
            foreach (
$lockedRepository->getPackages() as $package) {
               
$constraint = new Constraint('=', $package->getVersion());
               
$constraint->setPrettyString($package->getPrettyVersion());
               
$requires[$package->getName()] = $constraint;
            }
        }

       
$rootConstraints = array();
        foreach (
$requires as $req => $constraint) {
           
// skip platform requirements from the root package to avoid filtering out existing platform packages
           
if ($this->ignorePlatformReqs && preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $req)) {
                continue;
            }
            if (
$constraint instanceof Link) {
               
$rootConstraints[$req] = $constraint->getConstraint();
            } else {
               
$rootConstraints[$req] = $constraint;
            }
        }

        return new
Pool($minimumStability, $stabilityFlags, $rootConstraints);
    }

   
/**
     * @return DefaultPolicy
     */
   
private function createPolicy()
    {
       
$preferStable = null;
       
$preferLowest = null;
        if (!
$this->update) {
           
$preferStable = $this->locker->getPreferStable();
           
$preferLowest = $this->locker->getPreferLowest();
        }
       
// old lock file without prefer stable/lowest will return null
        // so in this case we use the composer.json info
       
if (null === $preferStable) {
           
$preferStable = $this->preferStable || $this->package->getPreferStable();
        }
        if (
null === $preferLowest) {
           
$preferLowest = $this->preferLowest;
        }

        return new
DefaultPolicy($preferStable, $preferLowest);
    }

   
/**
     * @param  RootPackageInterface $rootPackage
     * @param  PlatformRepository   $platformRepo
     * @return Request
     */
   
private function createRequest(RootPackageInterface $rootPackage, PlatformRepository $platformRepo)
    {
       
$request = new Request();

       
$constraint = new Constraint('=', $rootPackage->getVersion());
       
$constraint->setPrettyString($rootPackage->getPrettyVersion());
       
$request->install($rootPackage->getName(), $constraint);

       
$fixedPackages = $platformRepo->getPackages();
        if (
$this->additionalInstalledRepository) {
           
$additionalFixedPackages = $this->additionalInstalledRepository->getPackages();
           
$fixedPackages = array_merge($fixedPackages, $additionalFixedPackages);
        }

       
// fix the version of all platform packages + additionally installed packages
        // to prevent the solver trying to remove or update those
       
$provided = $rootPackage->getProvides();
        foreach (
$fixedPackages as $package) {
           
$constraint = new Constraint('=', $package->getVersion());
           
$constraint->setPrettyString($package->getPrettyVersion());

           
// skip platform packages that are provided by the root package
           
if ($package->getRepository() !== $platformRepo
               
|| !isset($provided[$package->getName()])
                || !
$provided[$package->getName()]->getConstraint()->matches($constraint)
            ) {
               
$request->fix($package->getName(), $constraint);
            }
        }

        return
$request;
    }

   
/**
     * @param  WritableRepositoryInterface $localRepo
     * @param  Pool                        $pool
     * @param  PolicyInterface             $policy
     * @param  array                       $repositories
     * @param  RepositoryInterface         $installedRepo
     * @param  RepositoryInterface         $lockedRepository
     * @param  string                      $task
     * @param  array|null                  $operations
     * @return array
     */
   
private function processDevPackages($localRepo, $pool, $policy, $repositories, $installedRepo, $lockedRepository, $task, array $operations = null)
    {
        if (
$task === 'force-updates' && null === $operations) {
            throw new \
InvalidArgumentException('Missing operations argument');
        }
        if (
$task === 'force-links') {
           
$operations = array();
        }

        if (
$this->update && $this->updateWhitelist) {
           
$currentPackages = $this->getCurrentPackages($installedRepo);
        }

        foreach (
$localRepo->getCanonicalPackages() as $package) {
           
// skip non-dev packages
           
if (!$package->isDev()) {
                continue;
            }

           
// skip packages that will be updated/uninstalled
           
foreach ($operations as $operation) {
                if ((
'update' === $operation->getJobType() && $operation->getInitialPackage()->equals($package))
                    || (
'uninstall' === $operation->getJobType() && $operation->getPackage()->equals($package))
                ) {
                    continue
2;
                }
            }

            if (
$this->update) {
               
// skip package if the allow list is enabled and it is not in it
               
if ($this->updateWhitelist && !$this->isUpdateable($package)) {
                   
// check if non-updateable packages are out of date compared to the lock file to ensure we don't corrupt it
                   
foreach ($currentPackages as $curPackage) {
                        if (
$curPackage->isDev() && $curPackage->getName() === $package->getName() && $curPackage->getVersion() === $package->getVersion()) {
                            if (
$task === 'force-links') {
                               
$package->setRequires($curPackage->getRequires());
                               
$package->setConflicts($curPackage->getConflicts());
                               
$package->setProvides($curPackage->getProvides());
                               
$package->setReplaces($curPackage->getReplaces());
                            } elseif (
$task === 'force-updates') {
                                if ((
$curPackage->getSourceReference() && $curPackage->getSourceReference() !== $package->getSourceReference())
                                    || (
$curPackage->getDistReference() && $curPackage->getDistReference() !== $package->getDistReference())
                                ) {
                                   
$operations[] = new UpdateOperation($package, $curPackage);
                                }
                            }

                            break;
                        }
                    }

                    continue;
                }

               
// find similar packages (name/version) in all repositories
               
$matches = $pool->whatProvides($package->getName(), new Constraint('=', $package->getVersion()));
                foreach (
$matches as $index => $match) {
                   
// skip local packages
                   
if (!in_array($match->getRepository(), $repositories, true)) {
                        unset(
$matches[$index]);
                        continue;
                    }

                   
// skip providers/replacers
                   
if ($match->getName() !== $package->getName()) {
                        unset(
$matches[$index]);
                        continue;
                    }

                   
$matches[$index] = $match->getId();
                }

               
// select preferred package according to policy rules
               
if ($matches && $matches = $policy->selectPreferredPackages($pool, array(), $matches)) {
                   
$newPackage = $pool->literalToPackage($matches[0]);

                    if (
$task === 'force-links' && $newPackage) {
                       
$package->setRequires($newPackage->getRequires());
                       
$package->setConflicts($newPackage->getConflicts());
                       
$package->setProvides($newPackage->getProvides());
                       
$package->setReplaces($newPackage->getReplaces());
                    }

                    if (
                       
$task === 'force-updates'
                       
&& $newPackage
                       
&& (
                            (
$newPackage->getSourceReference() && $newPackage->getSourceReference() !== $package->getSourceReference())
                            || (
$newPackage->getDistReference() && $newPackage->getDistReference() !== $package->getDistReference())
                        )
                    ) {
                       
$operations[] = new UpdateOperation($package, $newPackage);

                        continue;
                    }
                }

                if (
$task === 'force-updates') {
                   
// force installed package to update to referenced version in root package if it does not match the installed version
                   
$references = $this->package->getReferences();

                    if (isset(
$references[$package->getName()]) && $references[$package->getName()] !== $package->getSourceReference()) {
                       
// changing the source ref to update to will be handled in the operations loop
                       
$operations[] = new UpdateOperation($package, clone $package);
                    }
                }
            } else {
               
// force update to locked version if it does not match the installed version
               
foreach ($lockedRepository->findPackages($package->getName()) as $lockedPackage) {
                    if (
$lockedPackage->isDev() && $lockedPackage->getVersion() === $package->getVersion()) {
                        if (
$task === 'force-links') {
                           
$package->setRequires($lockedPackage->getRequires());
                           
$package->setConflicts($lockedPackage->getConflicts());
                           
$package->setProvides($lockedPackage->getProvides());
                           
$package->setReplaces($lockedPackage->getReplaces());
                        } elseif (
$task === 'force-updates') {
                            if ((
$lockedPackage->getSourceReference() && $lockedPackage->getSourceReference() !== $package->getSourceReference())
                                || (
$lockedPackage->getDistReference() && $lockedPackage->getDistReference() !== $package->getDistReference())
                            ) {
                               
$operations[] = new UpdateOperation($package, $lockedPackage);
                            }
                        }

                        break;
                    }
                }
            }
        }

        return
$operations;
    }

   
/**
     * Loads the most "current" list of packages that are installed meaning from lock ideally or from installed repo as fallback
     * @param  RepositoryInterface $installedRepo
     * @return array
     */
   
private function getCurrentPackages($installedRepo)
    {
        if (
$this->locker->isLocked()) {
            try {
                return
$this->locker->getLockedRepository(true)->getPackages();
            } catch (\
RuntimeException $e) {
               
// fetch only non-dev packages from lock if doing a dev update fails due to a previously incomplete lock file
               
return $this->locker->getLockedRepository()->getPackages();
            }
        }

        return
$installedRepo->getPackages();
    }

   
/**
     * @return array
     */
   
private function getRootAliases()
    {
        if (
$this->update) {
           
$aliases = $this->package->getAliases();
        } else {
           
$aliases = $this->locker->getAliases();
        }

       
$normalizedAliases = array();

        foreach (
$aliases as $alias) {
           
$normalizedAliases[$alias['package']][$alias['version']] = array(
               
'alias' => $alias['alias'],
               
'alias_normalized' => $alias['alias_normalized'],
            );
        }

        return
$normalizedAliases;
    }

   
/**
     * @param Pool                        $pool
     * @param PolicyInterface             $policy
     * @param WritableRepositoryInterface $localRepo
     * @param array                       $repositories
     */
   
private function processPackageUrls($pool, $policy, $localRepo, $repositories)
    {
        if (!
$this->update) {
            return;
        }

       
$rootRefs = $this->package->getReferences();

        foreach (
$localRepo->getCanonicalPackages() as $package) {
           
// find similar packages (name/version) in all repositories
           
$matches = $pool->whatProvides($package->getName(), new Constraint('=', $package->getVersion()));
            foreach (
$matches as $index => $match) {
               
// skip local packages
               
if (!in_array($match->getRepository(), $repositories, true)) {
                    unset(
$matches[$index]);
                    continue;
                }

               
// skip providers/replacers
               
if ($match->getName() !== $package->getName()) {
                    unset(
$matches[$index]);
                    continue;
                }

               
$matches[$index] = $match->getId();
            }

           
// select preferred package according to policy rules
           
if ($matches && $matches = $policy->selectPreferredPackages($pool, array(), $matches)) {
               
$newPackage = $pool->literalToPackage($matches[0]);

               
// update the dist and source URLs
               
$sourceUrl = $package->getSourceUrl();
               
$newSourceUrl = $newPackage->getSourceUrl();
               
$newReference = $newPackage->getSourceReference();

                if (
$package->isDev() && isset($rootRefs[$package->getName()]) && $package->getSourceReference() === $rootRefs[$package->getName()]) {
                   
$newReference = $rootRefs[$package->getName()];
                }

               
$this->updatePackageUrl($package, $newSourceUrl, $newPackage->getSourceType(), $newReference, $newPackage->getDistUrl(), $newPackage->getDistType(), $newPackage->getDistSha1Checksum());

                if (
$package instanceof CompletePackage && $newPackage instanceof CompletePackage) {
                   
$package->setAbandoned($newPackage->getReplacementPackage() ?: $newPackage->isAbandoned());
                }

               
$package->setDistMirrors($newPackage->getDistMirrors());
               
$package->setSourceMirrors($newPackage->getSourceMirrors());
               
$package->setTransportOptions($newPackage->getTransportOptions());
            }
        }
    }

    private function
updatePackageUrl(PackageInterface $package, $sourceUrl, $sourceType, $sourceReference, $distUrl, $distType, $distShaSum)
    {
       
$oldSourceRef = $package->getSourceReference();

        if (
$package->getSourceUrl() !== $sourceUrl) {
           
$package->setSourceType($sourceType);
           
$package->setSourceUrl($sourceUrl);
           
$package->setSourceReference($sourceReference);
        }

       
// only update dist url for github/bitbucket/gitlab dists as they use a combination of dist url + dist reference to install
        // but for other urls this is ambiguous and could result in bad outcomes
       
if (preg_match('{^https?://(?:(?:www\.)?bitbucket\.org|(api\.)?github\.com|(?:www\.)?gitlab\.com)/}i', $distUrl)) {
           
$package->setDistUrl($distUrl);
           
$package->setDistType($distType);
           
$package->setDistSha1Checksum($distShaSum);
           
$this->updateInstallReferences($package, $sourceReference);
        }

        if (
$this->updateWhitelist && !$this->isUpdateable($package)) {
           
$this->updateInstallReferences($package, $oldSourceRef);
        }
    }

    private function
updateInstallReferences(PackageInterface $package, $reference)
    {
        if (!
$reference) {
            return;
        }

       
$package->setSourceReference($reference);

        if (
preg_match('{^https?://(?:(?:www\.)?bitbucket\.org|(api\.)?github\.com|(?:www\.)?gitlab\.com)/}i', $package->getDistUrl())) {
           
$package->setDistReference($reference);
           
$package->setDistUrl(preg_replace('{(?<=/|sha=)[a-f0-9]{40}(?=/|$)}i', $reference, $package->getDistUrl()));
        } elseif (
$package->getDistReference()) { // update the dist reference if there was one, but if none was provided ignore it
           
$package->setDistReference($reference);
        }
    }

   
/**
     * @param PlatformRepository $platformRepo
     * @param array              $aliases
     */
   
private function aliasPlatformPackages(PlatformRepository $platformRepo, $aliases)
    {
        foreach (
$aliases as $package => $versions) {
            foreach (
$versions as $version => $alias) {
               
$packages = $platformRepo->findPackages($package, $version);
                foreach (
$packages as $package) {
                   
$aliasPackage = new AliasPackage($package, $alias['alias_normalized'], $alias['alias']);
                   
$aliasPackage->setRootPackageAlias(true);
                   
$platformRepo->addPackage($aliasPackage);
                }
            }
        }
    }

   
/**
     * @param  PackageInterface $package
     * @return bool
     */
   
private function isUpdateable(PackageInterface $package)
    {
        if (!
$this->updateWhitelist) {
            throw new \
LogicException('isUpdateable should only be called when an allow list is present');
        }

        foreach (
$this->updateWhitelist as $pattern => $void) {
           
$patternRegexp = BasePackage::packageNameToRegexp($pattern);
            if (
preg_match($patternRegexp, $package->getName())) {
                return
true;
            }
        }

        return
false;
    }

   
/**
     * @param  array $links
     * @return array
     */
   
private function extractPlatformRequirements($links)
    {
       
$platformReqs = array();
        foreach (
$links as $link) {
            if (
preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $link->getTarget())) {
               
$platformReqs[$link->getTarget()] = $link->getPrettyConstraint();
            }
        }

        return
$platformReqs;
    }

   
/**
     * Adds all dependencies of the update allow list to the allow list, too.
     *
     * Packages which are listed as requirements in the root package will be
     * skipped including their dependencies, unless they are listed in the
     * update allow list themselves or $whitelistAllDependencies is true.
     *
     * @param RepositoryInterface $localOrLockRepo Use the locked repo if available, otherwise installed repo will do
     *                                             As we want the most accurate package list to work with, and installed
     *                                             repo might be empty but locked repo will always be current.
     * @param array               $rootRequires    An array of links to packages in require of the root package
     * @param array               $rootDevRequires An array of links to packages in require-dev of the root package
     */
   
private function allowListUpdateDependencies($localOrLockRepo, array $rootRequires, array $rootDevRequires)
    {
        if (!
$this->updateWhitelist) {
            return;
        }

       
$rootRequires = array_merge($rootRequires, $rootDevRequires);

       
$skipPackages = array();
        if (!
$this->whitelistAllDependencies) {
            foreach (
$rootRequires as $require) {
               
$skipPackages[$require->getTarget()] = true;
            }
        }

       
$pool = new Pool('dev');
       
$pool->addRepository($localOrLockRepo);

       
$seen = array();

       
$rootRequiredPackageNames = array_keys($rootRequires);

        foreach (
$this->updateWhitelist as $packageName => $void) {
           
$packageQueue = new \SplQueue;
           
$nameMatchesRequiredPackage = false;

           
$depPackages = $pool->whatProvides($packageName);
           
$matchesByPattern = array();
           
// check if the name is a glob pattern that did not match directly
           
if (empty($depPackages)) {
               
// add any installed package matching the allow listed name/pattern
               
$allowListPatternSearchRegexp = BasePackage::packageNameToRegexp($packageName, '^%s$');
                foreach (
$localOrLockRepo->search($allowListPatternSearchRegexp) as $installedPackage) {
                   
$matchesByPattern[] = $pool->whatProvides($installedPackage['name']);
                }

               
// add root requirements which match the allow listed name/pattern
               
$allowListPatternRegexp = BasePackage::packageNameToRegexp($packageName);
                foreach (
$rootRequiredPackageNames as $rootRequiredPackageName) {
                    if (
preg_match($allowListPatternRegexp, $rootRequiredPackageName)) {
                       
$nameMatchesRequiredPackage = true;
                        break;
                    }
                }
            }

            if (!empty(
$matchesByPattern)) {
               
$depPackages = array_merge($depPackages, call_user_func_array('array_merge', $matchesByPattern));
            }

            if (
count($depPackages) == 0 && !$nameMatchesRequiredPackage && !in_array($packageName, array('nothing', 'lock', 'mirrors'))) {
               
$this->io->writeError('<warning>Package "' . $packageName . '" listed for update is not installed. Ignoring.</warning>');
            }

            foreach (
$depPackages as $depPackage) {
               
$packageQueue->enqueue($depPackage);
            }

            while (!
$packageQueue->isEmpty()) {
               
$package = $packageQueue->dequeue();
                if (isset(
$seen[$package->getId()])) {
                    continue;
                }

               
$seen[$package->getId()] = true;
               
$this->updateWhitelist[$package->getName()] = true;

                if (!
$this->whitelistDependencies && !$this->whitelistAllDependencies) {
                    continue;
                }

               
$requires = $package->getRequires();

                foreach (
$requires as $require) {
                   
$requirePackages = $pool->whatProvides($require->getTarget());

                    foreach (
$requirePackages as $requirePackage) {
                        if (isset(
$this->updateWhitelist[$requirePackage->getName()])) {
                            continue;
                        }

                        if (isset(
$skipPackages[$requirePackage->getName()]) && !preg_match(BasePackage::packageNameToRegexp($packageName), $requirePackage->getName())) {
                           
$this->io->writeError('<warning>Dependency "' . $requirePackage->getName() . '" is also a root requirement, but is not explicitly allowed. Ignoring.</warning>');
                            continue;
                        }

                       
$packageQueue->enqueue($requirePackage);
                    }
                }
            }
        }
    }

   
/**
     * Replace local repositories with InstalledArrayRepository instances
     *
     * This is to prevent any accidental modification of the existing repos on disk
     *
     * @param RepositoryManager $rm
     */
   
private function mockLocalRepositories(RepositoryManager $rm)
    {
       
$packages = array();
        foreach (
$rm->getLocalRepository()->getPackages() as $package) {
           
$packages[(string) $package] = clone $package;
        }
        foreach (
$packages as $key => $package) {
            if (
$package instanceof AliasPackage) {
               
$alias = (string) $package->getAliasOf();
               
$packages[$key] = new AliasPackage($packages[$alias], $package->getVersion(), $package->getPrettyVersion());
            }
        }
       
$rm->setLocalRepository(
            new
InstalledArrayRepository($packages)
        );
    }

   
/**
     * Create Installer
     *
     * @param  IOInterface $io
     * @param  Composer    $composer
     * @return Installer
     */
   
public static function create(IOInterface $io, Composer $composer)
    {
        return new static(
           
$io,
           
$composer->getConfig(),
           
$composer->getPackage(),
           
$composer->getDownloadManager(),
           
$composer->getRepositoryManager(),
           
$composer->getLocker(),
           
$composer->getInstallationManager(),
           
$composer->getEventDispatcher(),
           
$composer->getAutoloadGenerator()
        );
    }

   
/**
     * @param  RepositoryInterface $additionalInstalledRepository
     * @return $this
     */
   
public function setAdditionalInstalledRepository(RepositoryInterface $additionalInstalledRepository)
    {
       
$this->additionalInstalledRepository = $additionalInstalledRepository;

        return
$this;
    }

   
/**
     * Whether to run in drymode or not
     *
     * @param  bool      $dryRun
     * @return Installer
     */
   
public function setDryRun($dryRun = true)
    {
       
$this->dryRun = (bool) $dryRun;

        return
$this;
    }

   
/**
     * Checks, if this is a dry run (simulation mode).
     *
     * @return bool
     */
   
public function isDryRun()
    {
        return
$this->dryRun;
    }

   
/**
     * prefer source installation
     *
     * @param  bool      $preferSource
     * @return Installer
     */
   
public function setPreferSource($preferSource = true)
    {
       
$this->preferSource = (bool) $preferSource;

        return
$this;
    }

   
/**
     * prefer dist installation
     *
     * @param  bool      $preferDist
     * @return Installer
     */
   
public function setPreferDist($preferDist = true)
    {
       
$this->preferDist = (bool) $preferDist;

        return
$this;
    }

   
/**
     * Whether or not generated autoloader are optimized
     *
     * @param  bool      $optimizeAutoloader
     * @return Installer
     */
   
public function setOptimizeAutoloader($optimizeAutoloader = false)
    {
       
$this->optimizeAutoloader = (bool) $optimizeAutoloader;
        if (!
$this->optimizeAutoloader) {
           
// Force classMapAuthoritative off when not optimizing the
            // autoloader
           
$this->setClassMapAuthoritative(false);
        }

        return
$this;
    }

   
/**
     * Whether or not generated autoloader considers the class map
     * authoritative.
     *
     * @param  bool      $classMapAuthoritative
     * @return Installer
     */
   
public function setClassMapAuthoritative($classMapAuthoritative = false)
    {
       
$this->classMapAuthoritative = (bool) $classMapAuthoritative;
        if (
$this->classMapAuthoritative) {
           
// Force optimizeAutoloader when classmap is authoritative
           
$this->setOptimizeAutoloader(true);
        }

        return
$this;
    }

   
/**
     * Whether or not generated autoloader considers APCu caching.
     *
     * @param  bool      $apcuAutoloader
     * @return Installer
     */
   
public function setApcuAutoloader($apcuAutoloader = false)
    {
       
$this->apcuAutoloader = (bool) $apcuAutoloader;

        return
$this;
    }

   
/**
     * update packages
     *
     * @param  bool      $update
     * @return Installer
     */
   
public function setUpdate($update = true)
    {
       
$this->update = (bool) $update;

        return
$this;
    }

   
/**
     * enables dev packages
     *
     * @param  bool      $devMode
     * @return Installer
     */
   
public function setDevMode($devMode = true)
    {
       
$this->devMode = (bool) $devMode;

        return
$this;
    }

   
/**
     * set whether to run autoloader or not
     *
     * This is disabled implicitly when enabling dryRun
     *
     * @param  bool      $dumpAutoloader
     * @return Installer
     */
   
public function setDumpAutoloader($dumpAutoloader = true)
    {
       
$this->dumpAutoloader = (bool) $dumpAutoloader;

        return
$this;
    }

   
/**
     * set whether to run scripts or not
     *
     * This is disabled implicitly when enabling dryRun
     *
     * @param  bool      $runScripts
     * @return Installer
     */
   
public function setRunScripts($runScripts = true)
    {
       
$this->runScripts = (bool) $runScripts;

        return
$this;
    }

   
/**
     * set the config instance
     *
     * @param  Config    $config
     * @return Installer
     */
   
public function setConfig(Config $config)
    {
       
$this->config = $config;

        return
$this;
    }

   
/**
     * run in verbose mode
     *
     * @param  bool      $verbose
     * @return Installer
     */
   
public function setVerbose($verbose = true)
    {
       
$this->verbose = (bool) $verbose;

        return
$this;
    }

   
/**
     * Checks, if running in verbose mode.
     *
     * @return bool
     */
   
public function isVerbose()
    {
        return
$this->verbose;
    }

   
/**
     * set ignore Platform Package requirements
     *
     * @param  bool      $ignorePlatformReqs
     * @return Installer
     */
   
public function setIgnorePlatformRequirements($ignorePlatformReqs = false)
    {
       
$this->ignorePlatformReqs = (bool) $ignorePlatformReqs;

        return
$this;
    }

   
/**
     * restrict the update operation to a few packages, all other packages
     * that are already installed will be kept at their current version
     *
     * @deprecated use setUpdateAllowList instead
     *
     * @param  array     $packages
     * @return Installer
     */
   
public function setUpdateWhitelist(array $packages)
    {
       
$this->updateWhitelist = array_flip(array_map('strtolower', $packages));

        return
$this;
    }

   
/**
     * restrict the update operation to a few packages, all other packages
     * that are already installed will be kept at their current version
     *
     * @param  array     $packages
     * @return Installer
     */
   
public function setUpdateAllowList(array $packages)
    {
       
// call original method for BC
       
return $this->setUpdateWhitelist($packages);
    }

   
/**
     * @deprecated use setAllowListTransitiveDependencies instead
     */
   
public function setWhitelistDependencies($updateDependencies = true)
    {
        return
$this->setWhitelistTransitiveDependencies($updateDependencies);
    }

   
/**
     * Should dependencies of allowed packages (but not direct dependencies) be updated?
     *
     * This will NOT allow list any dependencies that are also directly defined
     * in the root package.
     *
     * @deprecated use setAllowListTransitiveDependencies instead
     *
     * @param  bool      $updateTransitiveDependencies
     * @return Installer
     */
   
public function setWhitelistTransitiveDependencies($updateTransitiveDependencies = true)
    {
       
$this->whitelistDependencies = (bool) $updateTransitiveDependencies;

        return
$this;
    }

   
/**
     * Should dependencies of allowed packages (but not direct dependencies) be updated?
     *
     * This will NOT allow list any dependencies that are also directly defined
     * in the root package.
     *
     * @param  bool      $updateTransitiveDependencies
     * @return Installer
     */
   
public function setAllowListTransitiveDependencies($updateTransitiveDependencies = true)
    {
       
// call original method for BC
       
return $this->setWhitelistTransitiveDependencies($updateTransitiveDependencies);
    }

   
/**
     * Should all dependencies of allowed packages be updated recursively?
     *
     * This will allow list any dependencies of the allow listed packages, including
     * those defined in the root package.
     *
     * @deprecated use setAllowListAllDependencies instead
     *
     * @param  bool      $updateAllDependencies
     * @return Installer
     */
   
public function setWhitelistAllDependencies($updateAllDependencies = true)
    {
       
$this->whitelistAllDependencies = (bool) $updateAllDependencies;

        return
$this;
    }

   
/**
     * Should all dependencies of allowed packages be updated recursively?
     *
     * This will allow list any dependencies of the allow listed packages, including
     * those defined in the root package.
     *
     * @param  bool      $updateAllDependencies
     * @return Installer
     */
   
public function setAllowListAllDependencies($updateAllDependencies = true)
    {
       
// call original method for BC
       
return $this->setWhitelistAllDependencies($updateAllDependencies);
    }

   
/**
     * Should packages be preferred in a stable version when updating?
     *
     * @param  bool      $preferStable
     * @return Installer
     */
   
public function setPreferStable($preferStable = true)
    {
       
$this->preferStable = (bool) $preferStable;

        return
$this;
    }

   
/**
     * Should packages be preferred in a lowest version when updating?
     *
     * @param  bool      $preferLowest
     * @return Installer
     */
   
public function setPreferLowest($preferLowest = true)
    {
       
$this->preferLowest = (bool) $preferLowest;

        return
$this;
    }

   
/**
     * Should the lock file be updated when updating?
     *
     * This is disabled implicitly when enabling dryRun
     *
     * @param  bool      $writeLock
     * @return Installer
     */
   
public function setWriteLock($writeLock = true)
    {
       
$this->writeLock = (bool) $writeLock;

        return
$this;
    }

   
/**
     * Should the operations (package install, update and removal) be executed on disk?
     *
     * This is disabled implicitly when enabling dryRun
     *
     * @param  bool      $executeOperations
     * @return Installer
     */
   
public function setExecuteOperations($executeOperations = true)
    {
       
$this->executeOperations = (bool) $executeOperations;

        return
$this;
    }

   
/**
     * Should suggestions be skipped?
     *
     * @param  bool      $skipSuggest
     * @return Installer
     */
   
public function setSkipSuggest($skipSuggest = true)
    {
       
$this->skipSuggest = (bool) $skipSuggest;

        return
$this;
    }

   
/**
     * Disables plugins.
     *
     * Call this if you want to ensure that third-party code never gets
     * executed. The default is to automatically install, and execute
     * custom third-party installers.
     *
     * @return Installer
     */
   
public function disablePlugins()
    {
       
$this->installationManager->disablePlugins();

        return
$this;
    }

   
/**
     * @param  SuggestedPackagesReporter $suggestedPackagesReporter
     * @return Installer
     */
   
public function setSuggestedPackagesReporter(SuggestedPackagesReporter $suggestedPackagesReporter)
    {
       
$this->suggestedPackagesReporter = $suggestedPackagesReporter;

        return
$this;
    }
}