Added RarDownloader for downloading RAR archived packages.

src/Composer/Downloader/RarDownloader.php

@@ -0,0 +1,94 @@
+<?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\Downloader;
+
+use Composer\Config;
+use Composer\Cache;
+use Composer\EventDispatcher\EventDispatcher;
+use Composer\Util\ProcessExecutor;
+use Composer\IO\IOInterface;
+use RarArchive;
+
+/**
+ * RAR archive downloader.
+ *
+ * Based on previous work by Jordi Boggiano ({@see ZipDownloader}).
+ *
+ * @author Derrick Nelson <drrcknlsn@gmail.com>
+ */
+class RarDownloader extends ArchiveDownloader
+{
+    protected $process;
+
+    public function __construct(IOInterface $io, Config $config, EventDispatcher $eventDispatcher = null, Cache $cache = null, ProcessExecutor $process = null)
+    {
+        $this->process = $process ?: new ProcessExecutor($io);
+        parent::__construct($io, $config, $eventDispatcher, $cache);
+    }
+
+    protected function extract($file, $path)
+    {
+        $processError = null;
+
+        // Try to use unrar on *nix
+        if (!defined('PHP_WINDOWS_VERSION_BUILD')) {
+            $command = 'unrar x ' . escapeshellarg($file) . ' ' . escapeshellarg($path) . ' && chmod -R u+w ' . escapeshellarg($path);
+
+            if (0 === $this->process->execute($command, $ignoredOutput)) {
+                return;
+            }
+
+            $processError = 'Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput();
+        }
+
+        if (!class_exists('RarArchive')) {
+            // php.ini path is added to the error message to help users find the correct file
+            $iniPath = php_ini_loaded_file();
+
+            if ($iniPath) {
+                $iniMessage = 'The php.ini used by your command-line PHP is: ' . $iniPath;
+            } else {
+                $iniMessage = 'A php.ini file does not exist. You will have to create one.';
+            }
+
+            $error = "Could not decompress the archive, enable the PHP rar extension or install unrar.\n"
+                . $iniMessage . "\n" . $processError;
+
+            if (!defined('PHP_WINDOWS_VERSION_BUILD')) {
+                $error = "Could not decompress the archive, enable the PHP rar extension.\n" . $iniMessage;
+            }
+
+            throw new \RuntimeException($error);
+        }
+
+        $rarArchive = RarArchive::open($file);
+
+        if (false === $rarArchive) {
+            throw new \UnexpectedValueException('Could not open RAR archive: ' . $file);
+        }
+
+        $entries = $rarArchive->getEntries();
+
+        if (false === $entries) {
+            throw new \RuntimeException('Could not retrieve RAR archive entries');
+        }
+
+        foreach ($entries as $entry) {
+            if (false === $entry->extract($path)) {
+                throw new \RuntimeException('Could not extract entry');
+            }
+        }
+
+        $rarArchive->close();
+    }
+}