Only do colors on terminals that support them. #4102.

1 files changed, 10 insertions, 0 deletions

diff --git a/sphinx/util/console.py b/sphinx/util/console.py
index 05ab7e50..d6ebcb94 100644
--- a/sphinx/util/console.py
+++ b/sphinx/util/console.py
@@ -9,6 +9,8 @@
     :license: BSD.
 """
 
+import os
+
 codes = {}
 
 def get_terminal_width():
@@ -34,6 +36,14 @@ def print_and_backspace(text, func):
     else:
         func(text.ljust(_tw) + _tw * "\b")
 
+def color_terminal():
+    if 'COLORTERM' in os.environ:
+        return True
+    term = os.environ.get('TERM', 'dumb').lower()
+    if 'xterm' in term or 'color' in term:
+        return True
+    return False
+
 
 def nocolor():
     codes.clear()