From 9df563f25f7ab8c3534935e62bdcf2e37498c0ab Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Fri, 4 Oct 2019 09:17:44 +0200
Subject: [PATCH] Add `Tty::color?`.

---
 Library/Homebrew/utils/tty.rb | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/utils/tty.rb b/Library/Homebrew/utils/tty.rb
index 76e2867dd9..3f69e508f5 100644
--- a/Library/Homebrew/utils/tty.rb
+++ b/Library/Homebrew/utils/tty.rb
@@ -64,10 +64,17 @@ module Tty
   end
 
   def to_s
-    return "" if !ENV["HOMEBREW_COLOR"] && (ENV["HOMEBREW_NO_COLOR"] || !$stdout.tty?)
+    return "" unless color?
 
     current_escape_sequence
   ensure
     reset_escape_sequence!
   end
+
+  def color?
+    return false if ENV["HOMEBREW_NO_COLOR"]
+    return true if ENV["HOMEBREW_COLOR"]
+
+    $stdout.tty?
+  end
 end