From 14962776971e753b31a062783ad758ed0e8dde24 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Wed, 11 Nov 2020 14:27:17 +0100
Subject: [PATCH] Disable TTY mode if STDOUT is not a TTY, fixes #9454

---
 src/Composer/Util/ProcessExecutor.php | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/Composer/Util/ProcessExecutor.php b/src/Composer/Util/ProcessExecutor.php
index 3423d9702..6f557b9c9 100644
--- a/src/Composer/Util/ProcessExecutor.php
+++ b/src/Composer/Util/ProcessExecutor.php
@@ -77,6 +77,13 @@ class ProcessExecutor
      */
     public function executeTty($command, $cwd = null)
     {
+        if (
+            (function_exists('stream_isatty') && !stream_isatty(STDOUT))
+            || (function_exists('posix_isatty') && !posix_isatty(STDOUT))
+        ) {
+            return $this->doExecute($command, $cwd, false);
+        }
+
         return $this->doExecute($command, $cwd, true);
     }