Reduce amount of Filesystem/ProcessExecutor instantiations, add lots of docblocks

src/Composer/Command/CreateProjectCommand.php

@@ -38,6 +38,7 @@ use Symfony\Component\Finder\Finder;
 use Composer\Json\JsonFile;
 use Composer\Config\JsonConfigSource;
 use Composer\Util\Filesystem;
+use Composer\Util\ProcessExecutor;
 use Composer\Util\Loop;
 use Composer\Package\Version\VersionParser;
 
@@ -186,7 +187,8 @@ EOT
             $composer = Factory::create($io, null, $disablePlugins);
         }
 
-        $fs = new Filesystem();
+        $process = new ProcessExecutor($io);
+        $fs = new Filesystem($process);
 
         if ($noScripts === false) {
             // dispatch event
@@ -307,7 +309,8 @@ EOT
             $directory = getcwd() . DIRECTORY_SEPARATOR . array_pop($parts);
         }
 
-        $fs = new Filesystem();
+        $process = new ProcessExecutor($io);
+        $fs = new Filesystem($fs);
         if (!$fs->isAbsolutePath($directory)) {
             $directory = getcwd() . DIRECTORY_SEPARATOR . $directory;
         }
@@ -397,11 +400,11 @@ EOT
         $factory = new Factory();
 
         $httpDownloader = $factory->createHttpDownloader($io, $config);
-        $dm = $factory->createDownloadManager($io, $config, $httpDownloader);
+        $dm = $factory->createDownloadManager($io, $config, $httpDownloader, $process);
         $dm->setPreferSource($preferSource)
             ->setPreferDist($preferDist);
 
-        $projectInstaller = new ProjectInstaller($directory, $dm);
+        $projectInstaller = new ProjectInstaller($directory, $dm, $fs);
         $im = $factory->createInstallationManager(new Loop($httpDownloader), $io);
         $im->addInstaller($projectInstaller);
         $im->execute(new InstalledFilesystemRepository(new JsonFile('php://memory')), array(new InstallOperation($package)));

src/Composer/Downloader/DownloadManager.php

@@ -25,11 +25,17 @@ use React\Promise\PromiseInterface;
  */
 class DownloadManager
 {
+    /** @var IOInterface */
     private $io;
+    /** @var bool */
     private $preferDist = false;
+    /** @var bool */
     private $preferSource = false;
+    /** @var array<string, string> */
     private $packagePreferences = array();
+    /** @var Filesystem */
     private $filesystem;
+    /** @var array<string, DownloaderInterface> */
     private $downloaders = array();
 
     /**

src/Composer/Downloader/FileDownloader.php

@@ -39,16 +39,22 @@ use Composer\Downloader\TransportException;
  */
 class FileDownloader implements DownloaderInterface, ChangeReportInterface
 {
+    /** @var IOInterface */
     protected $io;
+    /** @var Config */
     protected $config;
+    /** @var HttpDownloader */
     protected $httpDownloader;
+    /** @var Filesystem */
     protected $filesystem;
+    /** @var Cache */
     protected $cache;
+    /** @var EventDispatcher */
+    protected $eventDispatcher;
     /**
      * @private this is only public for php 5.3 support in closures
      */
     public $lastCacheWrites = array();
-    private $eventDispatcher;
 
     /**
      * Constructor.

src/Composer/Downloader/GzipDownloader.php

@@ -20,6 +20,7 @@ use Composer\Util\Platform;
 use Composer\Util\ProcessExecutor;
 use Composer\Util\HttpDownloader;
 use Composer\IO\IOInterface;
+use Composer\Util\Filesystem;
 
 /**
  * GZip archive downloader.
@@ -31,10 +32,10 @@ class GzipDownloader extends ArchiveDownloader
     /** @var ProcessExecutor */
     protected $process;
 
-    public function __construct(IOInterface $io, Config $config, HttpDownloader $downloader, EventDispatcher $eventDispatcher = null, Cache $cache = null, ProcessExecutor $process = null)
+    public function __construct(IOInterface $io, Config $config, HttpDownloader $downloader, EventDispatcher $eventDispatcher = null, Cache $cache = null, Filesystem $fs = null, ProcessExecutor $process = null)
     {
         $this->process = $process ?: new ProcessExecutor($io);
-        parent::__construct($io, $config, $downloader, $eventDispatcher, $cache);
+        parent::__construct($io, $config, $downloader, $eventDispatcher, $cache, $fs);
     }
 
     protected function extract(PackageInterface $package, $file, $path)

src/Composer/Downloader/PathDownloader.php

@@ -18,10 +18,15 @@ use Composer\Package\PackageInterface;
 use Composer\Package\Version\VersionGuesser;
 use Composer\Package\Version\VersionParser;
 use Composer\Util\Platform;
+use Composer\IO\IOInterface;
+use Composer\Config;
+use Composer\Cache;
+use Composer\Util\HttpDownloader;
 use Composer\Util\ProcessExecutor;
-use Composer\Util\Filesystem as ComposerFilesystem;
+use Composer\Util\Filesystem;
+use Composer\EventDispatcher\EventDispatcher;
 use Symfony\Component\Filesystem\Exception\IOException;
-use Symfony\Component\Filesystem\Filesystem;
+use Symfony\Component\Filesystem\Filesystem as SymfonyFilesystem;
 
 /**
  * Download a package from a local path.
@@ -34,6 +39,15 @@ class PathDownloader extends FileDownloader implements VcsCapableDownloaderInter
     const STRATEGY_SYMLINK = 10;
     const STRATEGY_MIRROR = 20;
 
+    /** @var ProcessExecutor */
+    private $process;
+
+    public function __construct(IOInterface $io, Config $config, HttpDownloader $downloader, EventDispatcher $eventDispatcher = null, Cache $cache = null, Filesystem $fs = null, ProcessExecutor $process = null)
+    {
+        $this->process = $process ?: new ProcessExecutor($io);
+        parent::__construct($io, $config, $downloader, $eventDispatcher, $cache, $fs);
+    }
+
     /**
      * {@inheritdoc}
      */
@@ -115,7 +129,7 @@ class PathDownloader extends FileDownloader implements VcsCapableDownloaderInter
             $allowedStrategies = array(self::STRATEGY_MIRROR);
         }
 
-        $fileSystem = new Filesystem();
+        $symfonyFilesystem = new SymfonyFilesystem();
         $this->filesystem->removeDirectory($path);
 
         if ($output) {
@@ -142,9 +156,9 @@ class PathDownloader extends FileDownloader implements VcsCapableDownloaderInter
                     $path = rtrim($path, "/");
                     $this->io->writeError(sprintf('Symlinking from %s', $url), false);
                     if ($transportOptions['relative']) {
-                        $fileSystem->symlink($shortestPath, $path);
+                        $symfonyFilesystem->symlink($shortestPath, $path);
                     } else {
-                        $fileSystem->symlink($realUrl, $path);
+                        $symfonyFilesystem->symlink($realUrl, $path);
                     }
                 }
             } catch (IOException $e) {
@@ -161,12 +175,11 @@ class PathDownloader extends FileDownloader implements VcsCapableDownloaderInter
 
         // Fallback if symlink failed or if symlink is not allowed for the package
         if (self::STRATEGY_MIRROR == $currentStrategy) {
-            $fs = new ComposerFilesystem();
+            $realUrl = $this->filesystem->normalizePath($realUrl);
-            $realUrl = $fs->normalizePath($realUrl);
 
             $this->io->writeError(sprintf('%sMirroring from %s', $isFallback ? '    ' : '', $url), false);
             $iterator = new ArchivableFilesFinder($realUrl, array());
-            $fileSystem->mirror($realUrl, $path, $iterator);
+            $symfonyFilesystem->mirror($realUrl, $path, $iterator);
         }
 
         if ($output) {
@@ -213,7 +226,7 @@ class PathDownloader extends FileDownloader implements VcsCapableDownloaderInter
     public function getVcsReference(PackageInterface $package, $path)
     {
         $parser = new VersionParser;
-        $guesser = new VersionGuesser($this->config, new ProcessExecutor($this->io), $parser);
+        $guesser = new VersionGuesser($this->config, $this->process, $parser);
         $dumper = new ArrayDumper;
 
         $packageConfig = $dumper->dump($package);

src/Composer/Downloader/RarDownloader.php

@@ -19,6 +19,7 @@ use Composer\Util\IniHelper;
 use Composer\Util\Platform;
 use Composer\Util\ProcessExecutor;
 use Composer\Util\HttpDownloader;
+use Composer\Util\Filesystem;
 use Composer\IO\IOInterface;
 use Composer\Package\PackageInterface;
 use RarArchive;
@@ -35,10 +36,10 @@ class RarDownloader extends ArchiveDownloader
     /** @var ProcessExecutor */
     protected $process;
 
-    public function __construct(IOInterface $io, Config $config, HttpDownloader $downloader, EventDispatcher $eventDispatcher = null, Cache $cache = null, ProcessExecutor $process = null)
+    public function __construct(IOInterface $io, Config $config, HttpDownloader $downloader, EventDispatcher $eventDispatcher = null, Cache $cache = null, Filesystem $fs = null, ProcessExecutor $process = null)
     {
         $this->process = $process ?: new ProcessExecutor($io);
-        parent::__construct($io, $config, $downloader, $eventDispatcher, $cache);
+        parent::__construct($io, $config, $downloader, $eventDispatcher, $cache, $fs);
     }
 
     protected function extract(PackageInterface $package, $file, $path)

src/Composer/Downloader/SvnDownloader.php

@@ -65,7 +65,7 @@ class SvnDownloader extends VcsDownloader
             throw new \RuntimeException('The .svn directory is missing from '.$path.', see https://getcomposer.org/commit-deps for more information');
         }
 
-        $util = new SvnUtil($url, $this->io, $this->config);
+        $util = new SvnUtil($url, $this->io, $this->config, $this->process);
         $flags = "";
         if (version_compare($util->binaryVersion(), '1.7.0', '>=')) {
             $flags .= ' --ignore-ancestry';
@@ -103,7 +103,7 @@ class SvnDownloader extends VcsDownloader
      */
     protected function execute(PackageInterface $package, $baseUrl, $command, $url, $cwd = null, $path = null)
     {
-        $util = new SvnUtil($baseUrl, $this->io, $this->config);
+        $util = new SvnUtil($baseUrl, $this->io, $this->config, $this->process);
         $util->setCacheCredentials($this->cacheCredentials);
         try {
             return $util->execute($command, $url, $cwd, $path, $this->io->isVerbose());
@@ -202,7 +202,7 @@ class SvnDownloader extends VcsDownloader
 
             $command = sprintf('svn log -r%s:%s --incremental', ProcessExecutor::escape($fromRevision), ProcessExecutor::escape($toRevision));
 
-            $util = new SvnUtil($baseUrl, $this->io, $this->config);
+            $util = new SvnUtil($baseUrl, $this->io, $this->config, $this->process);
             $util->setCacheCredentials($this->cacheCredentials);
             try {
                 return $util->executeLocal($command, $path, null, $this->io->isVerbose());

src/Composer/Downloader/XzDownloader.php

@@ -19,6 +19,7 @@ use Composer\Package\PackageInterface;
 use Composer\Util\ProcessExecutor;
 use Composer\Util\HttpDownloader;
 use Composer\IO\IOInterface;
+use Composer\Util\Filesystem;
 
 /**
  * Xz archive downloader.
@@ -31,11 +32,11 @@ class XzDownloader extends ArchiveDownloader
     /** @var ProcessExecutor */
     protected $process;
 
-    public function __construct(IOInterface $io, Config $config, HttpDownloader $downloader, EventDispatcher $eventDispatcher = null, Cache $cache = null, ProcessExecutor $process = null)
+    public function __construct(IOInterface $io, Config $config, HttpDownloader $downloader, EventDispatcher $eventDispatcher = null, Cache $cache = null, Filesystem $fs = null, ProcessExecutor $process = null)
     {
         $this->process = $process ?: new ProcessExecutor($io);
 
-        parent::__construct($io, $config, $downloader, $eventDispatcher, $cache);
+        parent::__construct($io, $config, $downloader, $eventDispatcher, $cache, $fs);
     }
 
     protected function extract(PackageInterface $package, $file, $path)

src/Composer/Downloader/ZipDownloader.php

@@ -19,6 +19,7 @@ use Composer\Package\PackageInterface;
 use Composer\Util\IniHelper;
 use Composer\Util\Platform;
 use Composer\Util\ProcessExecutor;
+use Composer\Util\Filesystem;
 use Composer\Util\HttpDownloader;
 use Composer\IO\IOInterface;
 use Symfony\Component\Process\ExecutableFinder;
@@ -38,10 +39,10 @@ class ZipDownloader extends ArchiveDownloader
     /** @var ZipArchive|null */
     private $zipArchiveObject;
 
-    public function __construct(IOInterface $io, Config $config, HttpDownloader $downloader, EventDispatcher $eventDispatcher = null, Cache $cache = null, ProcessExecutor $process = null)
+    public function __construct(IOInterface $io, Config $config, HttpDownloader $downloader, EventDispatcher $eventDispatcher = null, Cache $cache = null, Filesystem $fs = null, ProcessExecutor $process = null)
     {
         $this->process = $process ?: new ProcessExecutor($io);
-        parent::__construct($io, $config, $downloader, $eventDispatcher, $cache);
+        parent::__construct($io, $config, $downloader, $eventDispatcher, $cache, $fs);
     }
 
     /**

src/Composer/EventDispatcher/EventDispatcher.php

@@ -28,6 +28,7 @@ use Composer\Installer\PackageEvent;
 use Composer\Installer\BinaryInstaller;
 use Composer\Util\ProcessExecutor;
 use Composer\Script\Event as ScriptEvent;
+use Composer\ClassLoader;
 use Symfony\Component\Process\PhpExecutableFinder;
 
 /**
@@ -45,11 +46,17 @@ use Symfony\Component\Process\PhpExecutableFinder;
  */
 class EventDispatcher
 {
+    /** @var Composer */
     protected $composer;
+    /** @var IOInterface */
     protected $io;
+    /** @var ?ClassLoader */
     protected $loader;
+    /** @var ProcessExecutor */
     protected $process;
+    /** @var array<string, array<int, array<callable|string>>> */
     protected $listeners = array();
+    /** @var list<string> */
     private $eventStack;
 
     /**

src/Composer/Factory.php

@@ -335,15 +335,16 @@ class Factory
         }
 
         $httpDownloader = self::createHttpDownloader($io, $config);
+        $process = new ProcessExecutor($io);
         $loop = new Loop($httpDownloader);
         $composer->setLoop($loop);
 
         // initialize event dispatcher
-        $dispatcher = new EventDispatcher($composer, $io);
+        $dispatcher = new EventDispatcher($composer, $io, $process);
         $composer->setEventDispatcher($dispatcher);
 
         // initialize repository manager
-        $rm = RepositoryFactory::manager($io, $config, $httpDownloader, $dispatcher);
+        $rm = RepositoryFactory::manager($io, $config, $httpDownloader, $dispatcher, $process);
         $composer->setRepositoryManager($rm);
 
         // force-set the version of the global package if not defined as
@@ -354,7 +355,7 @@ class Factory
 
         // load package
         $parser = new VersionParser;
-        $guesser = new VersionGuesser($config, new ProcessExecutor($io), $parser);
+        $guesser = new VersionGuesser($config, $process, $parser);
         $loader = new Package\Loader\RootPackageLoader($rm, $config, $parser, $guesser, $io);
         $package = $loader->load($localConfig, 'Composer\Package\RootPackage', $cwd);
         $composer->setPackage($package);
@@ -368,7 +369,7 @@ class Factory
 
         if ($fullLoad) {
             // initialize download manager
-            $dm = $this->createDownloadManager($io, $config, $httpDownloader, $dispatcher);
+            $dm = $this->createDownloadManager($io, $config, $httpDownloader, $process, $dispatcher);
             $composer->setDownloadManager($dm);
 
             // initialize autoload generator
@@ -381,7 +382,7 @@ class Factory
         }
 
         // add installers to the manager (must happen after download manager is created since they read it out of $composer)
-        $this->createDefaultInstallers($im, $composer, $io);
+        $this->createDefaultInstallers($im, $composer, $io, $process);
 
         if ($fullLoad) {
             $globalComposer = null;
@@ -399,7 +400,7 @@ class Factory
         if ($fullLoad && isset($composerFile)) {
             $lockFile = self::getLockFile($composerFile);
 
-            $locker = new Package\Locker($io, new JsonFile($lockFile, null, $io), $im, file_get_contents($composerFile));
+            $locker = new Package\Locker($io, new JsonFile($lockFile, null, $io), $im, file_get_contents($composerFile), $process);
             $composer->setLocker($locker);
         }
 
@@ -460,14 +461,16 @@ class Factory
      * @param  EventDispatcher            $eventDispatcher
      * @return Downloader\DownloadManager
      */
-    public function createDownloadManager(IOInterface $io, Config $config, HttpDownloader $httpDownloader, EventDispatcher $eventDispatcher = null)
+    public function createDownloadManager(IOInterface $io, Config $config, HttpDownloader $httpDownloader, ProcessExecutor $process, EventDispatcher $eventDispatcher = null)
     {
         $cache = null;
         if ($config->get('cache-files-ttl') > 0) {
             $cache = new Cache($io, $config->get('cache-files-dir'), 'a-z0-9_./');
         }
 
-        $dm = new Downloader\DownloadManager($io);
+        $fs = new Filesystem($process);
+
+        $dm = new Downloader\DownloadManager($io, false, $fs);
         switch ($preferred = $config->get('preferred-install')) {
             case 'dist':
                 $dm->setPreferDist(true);
@@ -485,22 +488,19 @@ class Factory
             $dm->setPreferences($preferred);
         }
 
-        $executor = new ProcessExecutor($io);
+        $dm->setDownloader('git', new Downloader\GitDownloader($io, $config, $process, $fs));
-        $fs = new Filesystem($executor);
+        $dm->setDownloader('svn', new Downloader\SvnDownloader($io, $config, $process, $fs));
-
+        $dm->setDownloader('fossil', new Downloader\FossilDownloader($io, $config, $process, $fs));
-        $dm->setDownloader('git', new Downloader\GitDownloader($io, $config, $executor, $fs));
+        $dm->setDownloader('hg', new Downloader\HgDownloader($io, $config, $process, $fs));
-        $dm->setDownloader('svn', new Downloader\SvnDownloader($io, $config, $executor, $fs));
+        $dm->setDownloader('perforce', new Downloader\PerforceDownloader($io, $config, $process, $fs));
-        $dm->setDownloader('fossil', new Downloader\FossilDownloader($io, $config, $executor, $fs));
+        $dm->setDownloader('zip', new Downloader\ZipDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $fs, $process));
-        $dm->setDownloader('hg', new Downloader\HgDownloader($io, $config, $executor, $fs));
+        $dm->setDownloader('rar', new Downloader\RarDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $fs, $process));
-        $dm->setDownloader('perforce', new Downloader\PerforceDownloader($io, $config));
+        $dm->setDownloader('tar', new Downloader\TarDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $fs));
-        $dm->setDownloader('zip', new Downloader\ZipDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $executor));
+        $dm->setDownloader('gzip', new Downloader\GzipDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $fs, $process));
-        $dm->setDownloader('rar', new Downloader\RarDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $executor));
+        $dm->setDownloader('xz', new Downloader\XzDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $fs, $process));
-        $dm->setDownloader('tar', new Downloader\TarDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache));
+        $dm->setDownloader('phar', new Downloader\PharDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $fs));
-        $dm->setDownloader('gzip', new Downloader\GzipDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $executor));
+        $dm->setDownloader('file', new Downloader\FileDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $fs));
-        $dm->setDownloader('xz', new Downloader\XzDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $executor));
+        $dm->setDownloader('path', new Downloader\PathDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache, $fs, $process));
-        $dm->setDownloader('phar', new Downloader\PharDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache));
-        $dm->setDownloader('file', new Downloader\FileDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache));
-        $dm->setDownloader('path', new Downloader\PathDownloader($io, $config, $httpDownloader, $eventDispatcher, $cache));
 
         return $dm;
     }
@@ -544,10 +544,13 @@ class Factory
      * @param Composer                      $composer
      * @param IO\IOInterface                $io
      */
-    protected function createDefaultInstallers(Installer\InstallationManager $im, Composer $composer, IOInterface $io)
+    protected function createDefaultInstallers(Installer\InstallationManager $im, Composer $composer, IOInterface $io, ProcessExecutor $process = null)
     {
-        $im->addInstaller(new Installer\LibraryInstaller($io, $composer, null));
+        $fs = new Filesystem($process);
-        $im->addInstaller(new Installer\PluginInstaller($io, $composer));
+        $binaryInstaller = new Installer\BinaryInstaller($io, rtrim($composer->getConfig()->get('bin-dir'), '/'), $composer->getConfig()->get('bin-compat'), $fs);
+
+        $im->addInstaller(new Installer\LibraryInstaller($io, $composer, null, $fs, $binaryInstaller));
+        $im->addInstaller(new Installer\PluginInstaller($io, $composer, $fs, $binaryInstaller));
         $im->addInstaller(new Installer\MetapackageInstaller($io));
     }
 

src/Composer/Installer/InstallationManager.php

@@ -37,11 +37,17 @@ use React\Promise\PromiseInterface;
  */
 class InstallationManager
 {
+    /** @var array<InstallerInterface> */
     private $installers = array();
+    /** @var array<string, InstallerInterface> */
     private $cache = array();
+    /** @var array<string, array<PackageInterface>> */
     private $notifiablePackages = array();
+    /** @var Loop */
     private $loop;
+    /** @var IOInterface */
     private $io;
+    /** @var EventDispatcher */
     private $eventDispatcher;
 
     public function __construct(Loop $loop, IOInterface $io, EventDispatcher $eventDispatcher = null)
@@ -181,7 +187,7 @@ class InstallationManager
             foreach ($cleanupPromises as $cleanup) {
                 $promises[] = new \React\Promise\Promise(function ($resolve, $reject) use ($cleanup) {
                     $promise = $cleanup();
-                    if (null === $promise) {
+                    if (!$promise instanceof PromiseInterface) {
                         $resolve();
                     } else {
                         $promise->then(function () use ($resolve) {

src/Composer/Installer/PluginInstaller.php

@@ -16,6 +16,7 @@ use Composer\Composer;
 use Composer\IO\IOInterface;
 use Composer\Repository\InstalledRepositoryInterface;
 use Composer\Package\PackageInterface;
+use Composer\Util\Filesystem;
 use React\Promise\PromiseInterface;
 
 /**
@@ -34,9 +35,9 @@ class PluginInstaller extends LibraryInstaller
      * @param IOInterface $io
      * @param Composer    $composer
      */
-    public function __construct(IOInterface $io, Composer $composer)
+    public function __construct(IOInterface $io, Composer $composer, Filesystem $fs = null, BinaryInstaller $binaryInstaller = null)
     {
-        parent::__construct($io, $composer, 'composer-plugin');
+        parent::__construct($io, $composer, 'composer-plugin', $fs, $binaryInstaller);
         $this->installationManager = $composer->getInstallationManager();
     }
 

src/Composer/Installer/ProjectInstaller.php

@@ -29,11 +29,11 @@ class ProjectInstaller implements InstallerInterface
     private $downloadManager;
     private $filesystem;
 
-    public function __construct($installPath, DownloadManager $dm)
+    public function __construct($installPath, DownloadManager $dm, Filesystem $fs)
     {
         $this->installPath = rtrim(strtr($installPath, '\\', '/'), '/').'/';
         $this->downloadManager = $dm;
-        $this->filesystem = new Filesystem;
+        $this->filesystem = $fs;
     }
 
     /**

src/Composer/Package/Archiver/ArchiveManager.php

@@ -25,7 +25,9 @@ use Composer\Json\JsonFile;
  */
 class ArchiveManager
 {
+    /** @var DownloadManager */
     protected $downloadManager;
+    /** @var Loop */
     protected $loop;
 
     /**

src/Composer/Package/Loader/RootPackageLoader.php

@@ -58,7 +58,7 @@ class RootPackageLoader extends ArrayLoader
 
         $this->manager = $manager;
         $this->config = $config;
-        $this->versionGuesser = $versionGuesser ?: new VersionGuesser($config, new ProcessExecutor(), $this->versionParser);
+        $this->versionGuesser = $versionGuesser ?: new VersionGuesser($config, new ProcessExecutor($io), $this->versionParser);
         $this->io = $io;
     }
 

src/Composer/Package/Locker.php

@@ -57,7 +57,7 @@ class Locker
      * @param InstallationManager $installationManager  installation manager instance
      * @param string              $composerFileContents The contents of the composer file
      */
-    public function __construct(IOInterface $io, JsonFile $lockFile, InstallationManager $installationManager, $composerFileContents)
+    public function __construct(IOInterface $io, JsonFile $lockFile, InstallationManager $installationManager, $composerFileContents, ProcessExecutor $process = null)
     {
         $this->lockFile = $lockFile;
         $this->installationManager = $installationManager;
@@ -65,7 +65,7 @@ class Locker
         $this->contentHash = self::getContentHash($composerFileContents);
         $this->loader = new ArrayLoader(null, true);
         $this->dumper = new ArrayDumper();
-        $this->process = new ProcessExecutor($io);
+        $this->process = $process ?: new ProcessExecutor($io);
     }
 
     /**

src/Composer/Plugin/PluginManager.php

@@ -34,15 +34,23 @@ use Composer\Util\PackageSorter;
  */
 class PluginManager
 {
+    /** @var Composer */
     protected $composer;
+    /** @var IOInterface */
     protected $io;
+    /** @var Composer */
     protected $globalComposer;
+    /** @var VersionParser */
     protected $versionParser;
+    /** @var bool */
     protected $disablePlugins = false;
 
+    /** @var array<PluginInterface> */
     protected $plugins = array();
+    /** @var array<string, PluginInterface> */
     protected $registeredPlugins = array();
 
+    /** @var int */
     private static $classCounter = 0;
 
     /**

src/Composer/Repository/ComposerRepository.php

@@ -1155,12 +1155,12 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
         $retries = 3;
 
         if (isset($this->packagesNotFoundCache[$filename])) {
-            return new Promise(function ($resolve, $reject) { $resolve(array('packages' => array())); });
+            return \React\Promise\resolve(array('packages' => array()));
         }
 
         if (isset($this->freshMetadataUrls[$filename]) && $lastModifiedTime) {
             // make it look like we got a 304 response
-            return new Promise(function ($resolve, $reject) { $resolve(true); });
+            return \React\Promise\resolve(true);
         }
 
         $httpDownloader = $this->httpDownloader;

src/Composer/Repository/PlatformRepository.php

@@ -30,6 +30,7 @@ class PlatformRepository extends ArrayRepository
 {
     const PLATFORM_PACKAGE_REGEX = '{^(?:php(?:-64bit|-ipv6|-zts|-debug)?|hhvm|(?:ext|lib)-[a-z0-9](?:[_.-]?[a-z0-9]+)*|composer-(?:plugin|runtime)-api)$}iD';
 
+    private static $hhvmVersion;
     private $versionParser;
 
     /**
@@ -45,7 +46,7 @@ class PlatformRepository extends ArrayRepository
 
     public function __construct(array $packages = array(), array $overrides = array(), ProcessExecutor $process = null)
     {
-        $this->process = $process === null ? (new ProcessExecutor()) : $process;
+        $this->process = $process;
         foreach ($overrides as $name => $version) {
             $this->overrides[strtolower($name)] = array('name' => $name, 'version' => $version);
         }
@@ -251,22 +252,7 @@ class PlatformRepository extends ArrayRepository
             $this->addPackage($lib);
         }
 
-        $hhvmVersion = defined('HHVM_VERSION') ? HHVM_VERSION : null;
+        if ($hhvmVersion = self::getHHVMVersion($this->process)) {
-        if ($hhvmVersion === null && !Platform::isWindows()) {
-            $finder = new ExecutableFinder();
-            $hhvm = $finder->find('hhvm');
-            if ($hhvm !== null) {
-                $exitCode = $this->process->execute(
-                    ProcessExecutor::escape($hhvm).
-                    ' --php -d hhvm.jit=0 -r "echo HHVM_VERSION;" 2>/dev/null',
-                    $hhvmVersion
-                );
-                if ($exitCode !== 0) {
-                    $hhvmVersion = null;
-                }
-            }
-        }
-        if ($hhvmVersion) {
             try {
                 $prettyVersion = $hhvmVersion;
                 $version = $this->versionParser->normalize($prettyVersion);
@@ -362,4 +348,29 @@ class PlatformRepository extends ArrayRepository
     {
         return 'ext-' . str_replace(' ', '-', $name);
     }
+
+    private static function getHHVMVersion(ProcessExecutor $process = null)
+    {
+        if (null !== self::$hhvmVersion) {
+            return self::$hhvmVersion ?: null;
+        }
+
+        self::$hhvmVersion = defined('HHVM_VERSION') ? HHVM_VERSION : null;
+        if (self::$hhvmVersion === null && !Platform::isWindows()) {
+            self::$hhvmVersion = false;
+            $finder = new ExecutableFinder();
+            $hhvmPath = $finder->find('hhvm');
+            if ($hhvmPath !== null) {
+                $process = $process ?: new ProcessExecutor();
+                $exitCode = $process->execute(
+                    ProcessExecutor::escape($hhvmPath).
+                    ' --php -d hhvm.jit=0 -r "echo HHVM_VERSION;" 2>/dev/null',
+                    self::$hhvmVersion
+                );
+                if ($exitCode !== 0) {
+                    self::$hhvmVersion = false;
+                }
+            }
+        }
+    }
 }

src/Composer/Repository/RepositoryFactory.php

@@ -17,6 +17,7 @@ use Composer\IO\IOInterface;
 use Composer\Config;
 use Composer\EventDispatcher\EventDispatcher;
 use Composer\Util\HttpDownloader;
+use Composer\Util\ProcessExecutor;
 use Composer\Json\JsonFile;
 
 /**
@@ -114,9 +115,9 @@ class RepositoryFactory
      * @param  HttpDownloader    $httpDownloader
      * @return RepositoryManager
      */
-    public static function manager(IOInterface $io, Config $config, HttpDownloader $httpDownloader, EventDispatcher $eventDispatcher = null)
+    public static function manager(IOInterface $io, Config $config, HttpDownloader $httpDownloader, EventDispatcher $eventDispatcher = null, ProcessExecutor $process = null)
     {
-        $rm = new RepositoryManager($io, $config, $httpDownloader, $eventDispatcher);
+        $rm = new RepositoryManager($io, $config, $httpDownloader, $eventDispatcher, $process);
         $rm->setRepositoryClass('composer', 'Composer\Repository\ComposerRepository');
         $rm->setRepositoryClass('vcs', 'Composer\Repository\VcsRepository');
         $rm->setRepositoryClass('package', 'Composer\Repository\PackageRepository');

src/Composer/Repository/RepositoryManager.php

@@ -17,6 +17,7 @@ use Composer\Config;
 use Composer\EventDispatcher\EventDispatcher;
 use Composer\Package\PackageInterface;
 use Composer\Util\HttpDownloader;
+use Composer\Util\ProcessExecutor;
 
 /**
  * Repositories manager.
@@ -27,20 +28,30 @@ use Composer\Util\HttpDownloader;
  */
 class RepositoryManager
 {
+    /** @var InstalledRepositoryInterface */
     private $localRepository;
+    /** @var list<RepositoryInterface> */
     private $repositories = array();
+    /** @var array<string, string> */
     private $repositoryClasses = array();
+    /** @var IOInterface */
     private $io;
+    /** @var Config */
     private $config;
-    private $eventDispatcher;
+    /** @var HttpDownloader */
     private $httpDownloader;
+    /** @var ?EventDispatcher */
+    private $eventDispatcher;
+    /** @var ProcessExecutor */
+    private $process;
 
-    public function __construct(IOInterface $io, Config $config, HttpDownloader $httpDownloader, EventDispatcher $eventDispatcher = null)
+    public function __construct(IOInterface $io, Config $config, HttpDownloader $httpDownloader, EventDispatcher $eventDispatcher = null, ProcessExecutor $process = null)
     {
         $this->io = $io;
         $this->config = $config;
         $this->httpDownloader = $httpDownloader;
         $this->eventDispatcher = $eventDispatcher;
+        $this->process = $process ?: new ProcessExecutor($io);
     }
 
     /**
@@ -130,7 +141,7 @@ class RepositoryManager
             unset($config['only'], $config['exclude'], $config['canonical']);
         }
 
-        $repository = new $class($config, $this->io, $this->config, $this->httpDownloader, $this->eventDispatcher);
+        $repository = new $class($config, $this->io, $this->config, $this->httpDownloader, $this->eventDispatcher, $this->process);
 
         if (isset($filterConfig)) {
             $repository = new FilterRepository($repository, $filterConfig);

src/Composer/Repository/Vcs/GitDriver.php

@@ -223,7 +223,6 @@ class GitDriver extends VcsDriver
         }
 
         $process = new ProcessExecutor($io);
-
         return $process->execute('git ls-remote --heads ' . ProcessExecutor::escape($url), $output) === 0;
     }
 }

src/Composer/Repository/Vcs/HgDriver.php

@@ -228,8 +228,8 @@ class HgDriver extends VcsDriver
             return false;
         }
 
-        $processExecutor = new ProcessExecutor($io);
+        $process = new ProcessExecutor($io);
-        $exit = $processExecutor->execute(sprintf('hg identify %s', ProcessExecutor::escape($url)), $ignored);
+        $exit = $process->execute(sprintf('hg identify %s', ProcessExecutor::escape($url)), $ignored);
 
         return $exit === 0;
     }

src/Composer/Repository/Vcs/SvnDriver.php

@@ -307,9 +307,8 @@ class SvnDriver extends VcsDriver
             return false;
         }
 
-        $processExecutor = new ProcessExecutor($io);
+        $process = new ProcessExecutor($io);
-
+        $exit = $process->execute(
-        $exit = $processExecutor->execute(
             "svn info --non-interactive ".ProcessExecutor::escape($url),
             $ignoredOutput
         );
@@ -320,14 +319,14 @@ class SvnDriver extends VcsDriver
         }
 
         // Subversion client 1.7 and older
-        if (false !== stripos($processExecutor->getErrorOutput(), 'authorization failed:')) {
+        if (false !== stripos($process->getErrorOutput(), 'authorization failed:')) {
             // This is likely a remote Subversion repository that requires
             // authentication. We will handle actual authentication later.
             return true;
         }
 
         // Subversion client 1.8 and newer
-        if (false !== stripos($processExecutor->getErrorOutput(), 'Authentication failed')) {
+        if (false !== stripos($process->getErrorOutput(), 'Authentication failed')) {
             // This is likely a remote Subversion or newer repository that requires
             // authentication. We will handle actual authentication later.
             return true;

src/Composer/Repository/VcsRepository.php

@@ -53,7 +53,7 @@ class VcsRepository extends ArrayRepository implements ConfigurableRepositoryInt
     private $emptyReferences = array();
     private $versionTransportExceptions = array();
 
-    public function __construct(array $repoConfig, IOInterface $io, Config $config, HttpDownloader $httpDownloader, EventDispatcher $dispatcher = null, array $drivers = null, VersionCacheInterface $versionCache = null)
+    public function __construct(array $repoConfig, IOInterface $io, Config $config, HttpDownloader $httpDownloader, EventDispatcher $dispatcher = null, ProcessExecutor $process = null, array $drivers = null, VersionCacheInterface $versionCache = null)
     {
         parent::__construct();
         $this->drivers = $drivers ?: array(
@@ -78,7 +78,7 @@ class VcsRepository extends ArrayRepository implements ConfigurableRepositoryInt
         $this->repoConfig = $repoConfig;
         $this->versionCache = $versionCache;
         $this->httpDownloader = $httpDownloader;
-        $this->processExecutor = new ProcessExecutor($io);
+        $this->processExecutor = $process ?: new ProcessExecutor($io);
     }
 
     public function getRepoName()

src/Composer/Util/Filesystem.php

@@ -28,7 +28,7 @@ class Filesystem
 
     public function __construct(ProcessExecutor $executor = null)
     {
-        $this->processExecutor = $executor ?: new ProcessExecutor();
+        $this->processExecutor = $executor;
     }
 
     public function remove($file)
@@ -320,7 +320,7 @@ class Filesystem
         if (Platform::isWindows()) {
             // Try to copy & delete - this is a workaround for random "Access denied" errors.
             $command = sprintf('xcopy %s %s /E /I /Q /Y', ProcessExecutor::escape($source), ProcessExecutor::escape($target));
-            $result = $this->processExecutor->execute($command, $output);
+            $result = $this->getProcess()->execute($command, $output);
 
             // clear stat cache because external processes aren't tracked by the php stat cache
             clearstatcache();
@@ -334,7 +334,7 @@ class Filesystem
             // We do not use PHP's "rename" function here since it does not support
             // the case where $source, and $target are located on different partitions.
             $command = sprintf('mv %s %s', ProcessExecutor::escape($source), ProcessExecutor::escape($target));
-            $result = $this->processExecutor->execute($command, $output);
+            $result = $this->getProcess()->execute($command, $output);
 
             // clear stat cache because external processes aren't tracked by the php stat cache
             clearstatcache();
@@ -546,6 +546,10 @@ class Filesystem
      */
     protected function getProcess()
     {
+        if (!$this->processExecutor) {
+             $this->processExecutor = new ProcessExecutor();
+        }
+
         return $this->processExecutor;
     }
 

tests/Composer/Test/Downloader/ZipDownloaderTest.php

@@ -194,7 +194,7 @@ class ZipDownloaderTest extends TestCase
             ->method('execute')
             ->will($this->returnValue(1));
 
-        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, $processExecutor);
+        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, null, $processExecutor);
         $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
     }
 
@@ -211,7 +211,7 @@ class ZipDownloaderTest extends TestCase
             ->method('execute')
             ->will($this->returnValue(0));
 
-        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, $processExecutor);
+        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, null, $processExecutor);
         $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
     }
 
@@ -238,7 +238,7 @@ class ZipDownloaderTest extends TestCase
             ->method('extractTo')
             ->will($this->returnValue(true));
 
-        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, $processExecutor);
+        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, null, $processExecutor);
         $this->setPrivateProperty('zipArchiveObject', $zipArchive, $downloader);
         $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
     }
@@ -270,7 +270,7 @@ class ZipDownloaderTest extends TestCase
           ->method('extractTo')
           ->will($this->returnValue(false));
 
-        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, $processExecutor);
+        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, null, $processExecutor);
         $this->setPrivateProperty('zipArchiveObject', $zipArchive, $downloader);
         $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
     }
@@ -298,7 +298,7 @@ class ZipDownloaderTest extends TestCase
             ->method('extractTo')
             ->will($this->returnValue(false));
 
-        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, $processExecutor);
+        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, null, $processExecutor);
         $this->setPrivateProperty('zipArchiveObject', $zipArchive, $downloader);
         $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
     }
@@ -330,7 +330,7 @@ class ZipDownloaderTest extends TestCase
           ->method('extractTo')
           ->will($this->returnValue(false));
 
-        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, $processExecutor);
+        $downloader = new MockedZipDownloader($this->io, $this->config, $this->httpDownloader, null, null, null, $processExecutor);
         $this->setPrivateProperty('zipArchiveObject', $zipArchive, $downloader);
         $downloader->extract($this->package, 'testfile.zip', 'vendor/dir');
     }

tests/Composer/Test/Mock/FactoryMock.php

@@ -23,6 +23,7 @@ use Composer\EventDispatcher\EventDispatcher;
 use Composer\IO\IOInterface;
 use Composer\Test\TestCase;
 use Composer\Util\Loop;
+use Composer\Util\ProcessExecutor;
 
 class FactoryMock extends Factory
 {
@@ -47,7 +48,7 @@ class FactoryMock extends Factory
         return new InstallationManagerMock();
     }
 
-    protected function createDefaultInstallers(Installer\InstallationManager $im, Composer $composer, IOInterface $io)
+    protected function createDefaultInstallers(Installer\InstallationManager $im, Composer $composer, IOInterface $io, ProcessExecutor $process = null)
     {
     }
 

tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php

@@ -18,6 +18,7 @@ use Composer\Package\Archiver\ArchiveManager;
 use Composer\Package\PackageInterface;
 use Composer\Util\Loop;
 use Composer\Test\Mock\FactoryMock;
+use Composer\Util\ProcessExecutor;
 
 class ArchiveManagerTest extends ArchiverTest
 {
@@ -36,7 +37,8 @@ class ArchiveManagerTest extends ArchiverTest
         $dm = $factory->createDownloadManager(
             $io = new NullIO,
             $config = FactoryMock::createConfig(),
-            $httpDownloader = $factory->createHttpDownloader($io, $config)
+            $httpDownloader = $factory->createHttpDownloader($io, $config),
+            new ProcessExecutor($io)
         );
         $loop = new Loop($httpDownloader);
         $this->manager = $factory->createArchiveManager($factory->createConfig(), $dm, $loop);

tests/Composer/Test/Repository/PlatformRepositoryTest.php

@@ -14,11 +14,15 @@ namespace Composer\Test\Repository;
 
 use Composer\Repository\PlatformRepository;
 use Composer\Test\TestCase;
+use Composer\Util\ProcessExecutor;
+use Composer\Package\Version\VersionParser;
 use Composer\Util\Platform;
 use Symfony\Component\Process\ExecutableFinder;
 
-class PlatformRepositoryTest extends TestCase {
+class PlatformRepositoryTest extends TestCase
-    public function testHHVMVersionWhenExecutingInHHVM() {
+{
+    public function testHHVMVersionWhenExecutingInHHVM()
+    {
         if (!defined('HHVM_VERSION_ID')) {
             $this->markTestSkipped('Not running with HHVM');
             return;
@@ -36,7 +40,8 @@ class PlatformRepositoryTest extends TestCase {
         );
     }
 
-    public function testHHVMVersionWhenExecutingInPHP() {
+    public function testHHVMVersionWhenExecutingInPHP()
+    {
         if (defined('HHVM_VERSION_ID')) {
             $this->markTestSkipped('Running with HHVM');
             return;
@@ -54,17 +59,18 @@ class PlatformRepositoryTest extends TestCase {
         if ($hhvm === null) {
             $this->markTestSkipped('HHVM is not installed');
         }
-        $process = $this->getMockBuilder('Composer\Util\ProcessExecutor')->getMock();
+        $repository = new PlatformRepository(array(), array());
-        $process->expects($this->once())->method('execute')->will($this->returnCallback(
-            function($command, &$out) {
-                $this->assertContains('HHVM_VERSION', $command);
-                $out = '4.0.1-dev';
-                return 0;
-            }
-        ));
-        $repository = new PlatformRepository(array(), array(), $process);
         $package = $repository->findPackage('hhvm', '*');
         $this->assertNotNull($package, 'failed to find HHVM package');
-        $this->assertSame('4.0.1.0-dev', $package->getVersion());
+
+        $process = new ProcessExecutor();
+        $exitCode = $process->execute(
+            ProcessExecutor::escape($hhvm).
+            ' --php -d hhvm.jit=0 -r "echo HHVM_VERSION;" 2>/dev/null',
+            $version
+        );
+        $parser = new VersionParser;
+
+        $this->assertSame($parser->normalize($version), $package->getVersion());
     }
 }