From 3fdd06b013ce167aeeb0d71ebe736d63c2ef7a1e Mon Sep 17 00:00:00 2001
From: Kevin Kofler <kevin.kofler@chello.at>
Date: Wed, 5 Nov 2014 23:49:41 +0100
Subject: [PATCH] CMakeColors.cmake: Use colors only if stderr is an
interactive terminal.
In particular, do not write ugly escape sequences to log files.
Fixes #124.
---
CMakeModules/CMakeColors.cmake | 39 +++++++++++++++++++---------------
1 file changed, 22 insertions(+), 17 deletions(-)
diff --git a/CMakeModules/CMakeColors.cmake b/CMakeModules/CMakeColors.cmake
index 34e87fcbd3..4d899e2457 100644
--- a/CMakeModules/CMakeColors.cmake
+++ b/CMakeModules/CMakeColors.cmake
@@ -1,19 +1,24 @@
if(NOT WIN32)
- string(ASCII 27 Esc)
- set(ColorReset "${Esc}[m")
- set(ColorBold "${Esc}[1m")
- set(Red "${Esc}[31m")
- set(Green "${Esc}[32m")
- set(Yellow "${Esc}[33m")
- set(Blue "${Esc}[34m")
- set(Magenta "${Esc}[35m")
- set(Cyan "${Esc}[36m")
- set(White "${Esc}[37m")
- set(BoldRed "${Esc}[1;31m")
- set(BoldGreen "${Esc}[1;32m")
- set(BoldYellow "${Esc}[1;33m")
- set(BoldBlue "${Esc}[1;34m")
- set(BoldMagenta "${Esc}[1;35m")
- set(BoldCyan "${Esc}[1;36m")
- set(BoldWhite "${Esc}[1;37m")
+ # [ -t 2 ] tests whether stderr is interactive.
+ # The negation '!' is because for POSIX shells, 0 is true and 1 is false.
+ execute_process(COMMAND [ ! -t 2 ] RESULT_VARIABLE IS_STDERR_INTERACTIVE)
+ if(IS_STDERR_INTERACTIVE)
+ string(ASCII 27 Esc)
+ set(ColorReset "${Esc}[m")
+ set(ColorBold "${Esc}[1m")
+ set(Red "${Esc}[31m")
+ set(Green "${Esc}[32m")
+ set(Yellow "${Esc}[33m")
+ set(Blue "${Esc}[34m")
+ set(Magenta "${Esc}[35m")
+ set(Cyan "${Esc}[36m")
+ set(White "${Esc}[37m")
+ set(BoldRed "${Esc}[1;31m")
+ set(BoldGreen "${Esc}[1;32m")
+ set(BoldYellow "${Esc}[1;33m")
+ set(BoldBlue "${Esc}[1;34m")
+ set(BoldMagenta "${Esc}[1;35m")
+ set(BoldCyan "${Esc}[1;36m")
+ set(BoldWhite "${Esc}[1;37m")
+ endif(IS_STDERR_INTERACTIVE)
endif()
--
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