From ba346ef04d7cc6fdbf9423b06f51e48485d20b77 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Thu, 21 Feb 2019 12:57:27 +0100
Subject: [PATCH] Add forward compatibility for upcoming v2 installed.json
 format, refs #7999

---
 src/Composer/Repository/FilesystemRepository.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Composer/Repository/FilesystemRepository.php b/src/Composer/Repository/FilesystemRepository.php
index bde55aad3..204aa095d 100644
--- a/src/Composer/Repository/FilesystemRepository.php
+++ b/src/Composer/Repository/FilesystemRepository.php
@@ -51,6 +51,11 @@ class FilesystemRepository extends WritableArrayRepository
         try {
             $packages = $this->file->read();
 
+            // forward compatibility for composer v2 installed.json
+            if (isset($packages['packages'])) {
+                $packages = $packages['packages'];
+            }
+
             if (!is_array($packages)) {
                 throw new \UnexpectedValueException('Could not parse package list from the repository');
             }