Replace PrestissimoFileFetcher with Guzzle

composer.json

@@ -6,7 +6,8 @@
     "require": {
         "php": ">=5.4.5",
         "composer-plugin-api": "^1.0.0",
-        "composer/semver": "^1.4"
+        "composer/semver": "^1.4",
+        "guzzlehttp/guzzle": "^6.2.1"
     },
     "autoload": {
         "psr-4": {

src/DrupalScaffoldCommand.php

@@ -27,6 +27,9 @@ protected function configure() {
    * {@inheritdoc}
    */
   protected function execute(InputInterface $input, OutputInterface $output) {
+    $vendorDir = $this->getComposer()->getConfig()->get('vendor-dir');
+    require $vendorDir . '/autoload.php';
+
     $handler = new Handler($this->getComposer(), $this->getIO());
     $handler->downloadScaffold();
     // Generate the autoload.php file after generating the scaffold files.

src/GuzzleFileFetcher.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace DrupalComposer\DrupalScaffold;
+
+use Composer\Util\RemoteFilesystem;
+use Composer\Config;
+use Composer\IO\IOInterface;
+use GuzzleHttp\Promise;
+use GuzzleHttp\Client;
+use GuzzleHttp\Pool;
+use GuzzleHttp\Psr7\Request;
+
+/**
+ * Extends the default FileFetcher and uses Guzzle for
+ * parallel downloads.
+ */
+class GuzzleFileFetcher extends FileFetcher {
+
+  /**
+   * @var \Composer\Config
+   */
+  protected $config;
+
+  /**
+   * Constructs this RollingCurlFileFetcher object.
+   */
+  public function __construct(RemoteFilesystem $remoteFilesystem, $source, IOInterface $io, $progress = TRUE, Config $config) {
+    parent::__construct($remoteFilesystem, $source, $io, $progress);
+    $this->config = $config;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function fetch($version, $destination, $override) {
+    $client = new Client();
+    $requests = [];
+    $metadata = [];
+
+    foreach ($this->filenames as $sourceFilename => $filename) {
+      $target = "$destination/$filename";
+      if ($override || !file_exists($target)) {
+        $url = $this->getUri($sourceFilename, $version);
+        $this->fs->ensureDirectoryExists($destination . '/' . dirname($filename));
+        $requests[] = new Request('GET', $url);
+        $metadata[] = [
+          'url' => $url,
+          'target' => $target,
+          'filename' => $filename,
+        ];
+      }
+    }
+
+    $pool = new Pool($client, $requests, [
+      'concurrency' => 5,
+      'fulfilled' => function ($response, $index) use ($metadata) {
+        $this->io->writeError("  - <info>{$metadata[$index]['filename']}</info> (<comment>{$metadata[$index]['url']}</comment>): ", TRUE);
+        file_put_contents($metadata[$index]['target'], (string) $response->getBody());
+      },
+      'rejected' => function ($reason, $index) {
+        throw $reason;
+      },
+    ]);
+
+    $promise = $pool->promise();
+    $promise->wait();
+  }
+}

src/Handler.php

@@ -14,6 +14,7 @@
 use Composer\Semver\Semver;
 use Composer\Util\Filesystem;
 use Composer\Util\RemoteFilesystem;
+use GuzzleHttp\ClientInterface;
 use Symfony\Component\Filesystem\Filesystem as SymfonyFilesystem;
 
 /**
@@ -69,6 +70,7 @@ protected function manualLoad() {
       'CommandProvider',
       'DrupalScaffoldCommand',
       'FileFetcher',
+      'GuzzleFileFetcher',
       'PrestissimoFileFetcher',
     ];
 
@@ -157,8 +159,9 @@ public function downloadScaffold() {
     $version = $this->getDrupalCoreVersion($drupalCorePackage);
 
     $remoteFs = new RemoteFilesystem($this->io);
+    $fetcherClass = $this->getFetcherClass();
 
-    $fetcher = new PrestissimoFileFetcher($remoteFs, $options['source'], $this->io, $this->progress, $this->composer->getConfig());
+    $fetcher = new $fetcherClass($remoteFs, $options['source'], $this->io, $this->progress, $this->composer->getConfig());
     $fetcher->setFilenames(array_combine($files, $files));
     $fetcher->fetch($version, $webroot, TRUE);
 
@@ -408,4 +411,11 @@ protected function getInitialDefault() {
     return [];
   }
 
+  protected function getFetcherClass() {
+    if (interface_exists("\\GuzzleHttp\\ClientInterface") && Semver::satisfies(ClientInterface::VERSION, '^6')) {
+      return GuzzleFileFetcher::class;
+    }
+    return FileFetcher::class;
+  }
+
 }

src/Plugin.php

@@ -51,7 +51,7 @@ public static function getSubscribedEvents() {
     return array(
       PackageEvents::POST_PACKAGE_INSTALL => 'postPackage',
       PackageEvents::POST_PACKAGE_UPDATE => 'postPackage',
-      ScriptEvents::POST_UPDATE_CMD => 'postCmd',
+      ScriptEvents::POST_AUTOLOAD_DUMP => 'postCmd',
       PluginEvents::COMMAND => 'cmdBegins',
     );
   }

src/PrestissimoFileFetcher.php

@@ -11,68 +11,9 @@
 /**
  * Extends the default FileFetcher and uses hirak/prestissimo for parallel
  * downloads.
+ *
+ * @deprecated Use the GuzzleFileFetcher instead.
  */
 class PrestissimoFileFetcher extends FileFetcher {
 
-  /**
-   * @var \Composer\Config
-   */
-  protected $config;
-
-  /**
-   * Constructs this PrestissimoFileFetcher object.
-   */
-  public function __construct(RemoteFilesystem $remoteFilesystem, $source, IOInterface $io, $progress = TRUE, Config $config) {
-    parent::__construct($remoteFilesystem, $source, $io, $progress);
-    $this->config = $config;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function fetch($version, $destination, $override) {
-    if (class_exists(CurlMulti::class)) {
-      $this->fetchWithPrestissimo($version, $destination, $override);
-      return;
-    }
-    parent::fetch($version, $destination, $override);
-  }
-
-  /**
-   * Fetch files in parallel.
-   */
-  protected function fetchWithPrestissimo($version, $destination, $override) {
-    $requests = [];
-
-    foreach ($this->filenames as $sourceFilename => $filename) {
-      $target = "$destination/$filename";
-      if ($override || !file_exists($target)) {
-        $url = $this->getUri($sourceFilename, $version);
-        $this->fs->ensureDirectoryExists($destination . '/' . dirname($filename));
-        $requests[] = new CopyRequest($url, $target, FALSE, $this->io, $this->config);
-      }
-    }
-
-    $successCnt = $failureCnt = 0;
-    $totalCnt = count($requests);
-    if ($totalCnt == 0) {
-      return;
-    }    
-
-    $multi = new CurlMulti();
-    $multi->setRequests($requests);
-    do {
-      $multi->setupEventLoop();
-      $multi->wait();
-      $result = $multi->getFinishedResults();
-      $successCnt += $result['successCnt'];
-      $failureCnt += $result['failureCnt'];
-      if ($this->progress) {
-        foreach ($result['urls'] as $url) {
-          $this->io->writeError("  - Downloading <comment>$successCnt</comment>/<comment>$totalCnt</comment>: <info>$url</info>", TRUE);
-        }
-      }
-    } while ($multi->remain());
-  }
-
 }