From 90c2a96936435a72bd4ae65cbaedc8cb7dc98050 Mon Sep 17 00:00:00 2001
From: Rob Bast <rob.bast@gmail.com>
Date: Mon, 14 Sep 2015 19:21:18 +0200
Subject: [PATCH] Default to stderr for console helpers (only merge if #15794
 gets merged)

---
 src/Symfony/Component/Console/Helper/ProcessHelper.php  | 9 +++++++++
 src/Symfony/Component/Console/Helper/ProgressBar.php    | 5 +++++
 src/Symfony/Component/Console/Helper/QuestionHelper.php | 5 +++++
 3 files changed, 19 insertions(+)

diff --git a/src/Symfony/Component/Console/Helper/ProcessHelper.php b/src/Symfony/Component/Console/Helper/ProcessHelper.php
index 0c9da73947..a811eb48e6 100644
--- a/src/Symfony/Component/Console/Helper/ProcessHelper.php
+++ b/src/Symfony/Component/Console/Helper/ProcessHelper.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Helper;
 
+use Symfony\Component\Console\Output\ConsoleOutputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Process\Exception\ProcessFailedException;
 use Symfony\Component\Process\Process;
@@ -37,6 +38,10 @@ class ProcessHelper extends Helper
      */
     public function run(OutputInterface $output, $cmd, $error = null, $callback = null, $verbosity = OutputInterface::VERBOSITY_VERY_VERBOSE)
     {
+        if ($output instanceof ConsoleOutputInterface) {
+            $output = $output->getErrorOutput();
+        }
+
         $formatter = $this->getHelperSet()->get('debug_formatter');
 
         if (is_array($cmd)) {
@@ -109,6 +114,10 @@ class ProcessHelper extends Helper
      */
     public function wrapCallback(OutputInterface $output, Process $process, $callback = null)
     {
+        if ($output instanceof ConsoleOutputInterface) {
+            $output = $output->getErrorOutput();
+        }
+
         $formatter = $this->getHelperSet()->get('debug_formatter');
 
         $that = $this;
diff --git a/src/Symfony/Component/Console/Helper/ProgressBar.php b/src/Symfony/Component/Console/Helper/ProgressBar.php
index 5bc3de4e73..7f4b2efb8d 100644
--- a/src/Symfony/Component/Console/Helper/ProgressBar.php
+++ b/src/Symfony/Component/Console/Helper/ProgressBar.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Helper;
 
+use Symfony\Component\Console\Output\ConsoleOutputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 
 /**
@@ -54,6 +55,10 @@ class ProgressBar
      */
     public function __construct(OutputInterface $output, $max = 0)
     {
+        if ($output instanceof ConsoleOutputInterface) {
+            $output = $output->getErrorOutput();
+        }
+
         $this->output = $output;
         $this->setMaxSteps($max);
 
diff --git a/src/Symfony/Component/Console/Helper/QuestionHelper.php b/src/Symfony/Component/Console/Helper/QuestionHelper.php
index 6584377aad..a533f8728d 100644
--- a/src/Symfony/Component/Console/Helper/QuestionHelper.php
+++ b/src/Symfony/Component/Console/Helper/QuestionHelper.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Console\Helper;
 
 use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\ConsoleOutputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Formatter\OutputFormatterStyle;
 use Symfony\Component\Console\Question\Question;
@@ -41,6 +42,10 @@ class QuestionHelper extends Helper
      */
     public function ask(InputInterface $input, OutputInterface $output, Question $question)
     {
+        if ($output instanceof ConsoleOutputInterface) {
+            $output = $output->getErrorOutput();
+        }
+
         if (!$input->isInteractive()) {
             return $question->getDefault();
         }