From b0da7db3af74522881c5fa34858adc5768024e0b Mon Sep 17 00:00:00 2001
From: David Zuelke <dzuelke@gmail.com>
Date: Tue, 8 Aug 2017 18:08:46 +0200
Subject: [PATCH] use COMPOSER env var if present for ancestor path search

---
 src/Composer/Console/Application.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Composer/Console/Application.php b/src/Composer/Console/Application.php
index 96ba7d900..081476d93 100644
--- a/src/Composer/Console/Application.php
+++ b/src/Composer/Console/Application.php
@@ -127,13 +127,13 @@ class Application extends BaseApplication
         }
 
         // prompt user for dir change if no composer.json is present in current dir
-        if ($io->isInteractive() && !in_array($commandName, array('init', 'about', 'help', 'diagnose', 'self-update', 'global'), true) && !file_exists('./composer.json')) {
+        if ($io->isInteractive() && !in_array($commandName, array('init', 'about', 'help', 'diagnose', 'self-update', 'global'), true) && !file_exists(Factory::getComposerFile())) {
             $dir = dirname(getcwd());
             $home = realpath(getenv('HOME') ?: getenv('USERPROFILE') ?: '/');
 
             // abort when we reach the home dir or top of the filesystem
             while (dirname($dir) !== $dir && $dir !== $home) {
-                if (file_exists($dir.'/composer.json')) {
+                if (file_exists($dir.'/'.Factory::getComposerFile())) {
                     if ($io->askConfirmation('<info>No composer.json in current directory, do you want to use the one at '.$dir.'?</info> [<comment>Y,n</comment>]? ', true)) {
                         $oldWorkingDir = getcwd();
                         chdir($dir);