From 486872150638d56483c2bc429ba9e137d9974ee8 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Thu, 15 Mar 2018 16:08:07 +0100
Subject: Filter ANSI colors when not writing to a terminal

Fixes https://github.com/NixOS/nixpkgs/issues/37114.
---
 src/libutil/logging.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/libutil/logging.cc')

diff --git a/src/libutil/logging.cc b/src/libutil/logging.cc
index e860b27d3d0b..799c6e1ae441 100644
--- a/src/libutil/logging.cc
+++ b/src/libutil/logging.cc
@@ -53,7 +53,7 @@ public:
             prefix = std::string("<") + c + ">";
         }
 
-        writeToStderr(prefix + filterANSIEscapes(fs.s) + "\n");
+        writeToStderr(prefix + filterANSIEscapes(fs.s, !tty) + "\n");
     }
 
     void startActivity(ActivityId act, Verbosity lvl, ActivityType type,
-- 
cgit 1.4.1