From 1bf9ff74939d899fe18a2325a29b7a59f953d214 Mon Sep 17 00:00:00 2001
From: Edgar Geier <egeier@rhrk.uni-kl.de>
Date: Mon, 22 Jul 2019 19:18:36 +0200
Subject: [PATCH] Don't use color if NO_COLOR environment variable is set

---
 pre_commit/color.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pre_commit/color.py b/pre_commit/color.py
index c785e2c9..831d50bf 100644
--- a/pre_commit/color.py
+++ b/pre_commit/color.py
@@ -48,6 +48,9 @@ def use_color(setting):
     if setting not in COLOR_CHOICES:
         raise InvalidColorSetting(setting)
 
+    if 'NO_COLOR' in os.environ:
+        return False
+
     return (
         setting == 'always' or
         (setting == 'auto' and sys.stdout.isatty() and terminal_supports_color)