From afc9069771cf45c54d20f6e36d33ede39aa009ae Mon Sep 17 00:00:00 2001
From: Jakub Onderka <jakub.onderka@gmail.com>
Date: Thu, 5 Dec 2013 21:26:02 +0100
Subject: [PATCH] Check exception code only if class ZipArchive exists

If is for example exception throwed when downloading tar archive on system without installed zip extension, PHP hangs on fatal error " Class 'ZipArchive' not found".
---
 src/Composer/Downloader/ArchiveDownloader.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Composer/Downloader/ArchiveDownloader.php b/src/Composer/Downloader/ArchiveDownloader.php
index 3f1cc4117..bfe174fb7 100644
--- a/src/Composer/Downloader/ArchiveDownloader.php
+++ b/src/Composer/Downloader/ArchiveDownloader.php
@@ -69,7 +69,7 @@ abstract class ArchiveDownloader extends FileDownloader
                 $this->filesystem->removeDirectory($temporaryDir);
 
                 // retry downloading if we have an invalid zip file
-                if ($retries && $e instanceof \UnexpectedValueException && $e->getCode() === \ZipArchive::ER_NOZIP) {
+                if ($retries && $e instanceof \UnexpectedValueException && class_exists('ZipArchive') && $e->getCode() === \ZipArchive::ER_NOZIP) {
                     $this->io->write('    Invalid zip file, retrying...');
                     usleep(500000);
                     continue;