From 6a7220fed8b6fa00ad4dd962ac147593b0616131 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Fri, 2 Aug 2019 15:57:33 +0200
Subject: [PATCH] Avoid wiping the whole target package if download of the new
 one fails, refs #7929

---
 src/Composer/Downloader/FileDownloader.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Composer/Downloader/FileDownloader.php b/src/Composer/Downloader/FileDownloader.php
index da2955638..6a08bd67d 100644
--- a/src/Composer/Downloader/FileDownloader.php
+++ b/src/Composer/Downloader/FileDownloader.php
@@ -175,7 +175,9 @@ class FileDownloader implements DownloaderInterface, ChangeReportInterface
 
         $reject = function ($e) use ($io, &$urls, $download, $fileName, $path, $package, &$retries, $filesystem, $self) {
             // clean up
-            $filesystem->removeDirectory($path);
+            if (file_exists($fileName)) {
+                $filesystem->unlink($fileName);
+            }
             $self->clearLastCacheWrite($package);
 
             if ($e instanceof TransportException) {