From 7bde1c5ab0e3eb029d34ce48efb55e6b3f103b59 Mon Sep 17 00:00:00 2001
From: Albert Hopkins <marduk@python.net>
Date: Thu, 17 Dec 2015 21:26:47 +0000
Subject: [PATCH] scripts/echo: don't use ANSI escapes if stdout is not a
 terminal

---
 scripts/echo | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/scripts/echo b/scripts/echo
index acedf43..96bb0c4 100755
--- a/scripts/echo
+++ b/scripts/echo
@@ -2,12 +2,20 @@
 
 import sys
 
+TTY = sys.stdout.isatty()
+
 write = sys.stdout.write
 
 write('\n')
-write('\x1b[')  # escape, left-bracket
-write('1;31m')  # bold red
+
+if TTY:
+    write('\x1b[')  # escape, left-bracket
+    write('1;31m')  # bold red
+
 write(' '.join(sys.argv[1:]))
-write('\x1b[')  # escape, left-bracket
-write('0m')     # reset
+
+if TTY:
+    write('\x1b[')  # escape, left-bracket
+    write('0m')     # reset
+
 write('\n')