From 9afbddab6ba14cf4b90146d3ecfe8455be2895bd Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Sun, 6 Aug 2017 16:54:17 +0200
Subject: [PATCH] Only update dist references when one existed already, fixes
 #6363

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

diff --git a/src/Composer/Installer.php b/src/Composer/Installer.php
index 122a4e9f0..10744d541 100644
--- a/src/Composer/Installer.php
+++ b/src/Composer/Installer.php
@@ -1187,10 +1187,12 @@ class Installer
         }
 
         $package->setSourceReference($reference);
-        $package->setDistReference($reference);
 
         if (preg_match('{^https?://(?:(?:www\.)?bitbucket\.org|(api\.)?github\.com)/}i', $package->getDistUrl())) {
+            $package->setDistReference($reference);
             $package->setDistUrl(preg_replace('{(?<=/)[a-f0-9]{40}(?=/|$)}i', $reference, $package->getDistUrl()));
+        } else if ($package->getDistReference()) { // update the dist reference if there was one, but if none was provided ignore it
+            $package->setDistReference($reference);
         }
     }