nux-runner: Do not use colors when output is not tty.

Signed-off-by: Tony Tkacik <tonydamage@gmail.com>

inc/nux-base.inc.sh

@@ -5,46 +5,49 @@ readonly NUX_ENV_DIR=$(dirname $NUX_INC_DIR)
 
 # Color definitions
 
-readonly nc_bold=`tput setaf 0`
-readonly nc_bg_bold=`tput setab 0`
-readonly nc_black=`tput setab 0`
-readonly nc_bg_black=`tput setab 0`
-readonly nc_cyan=`tput setaf 6`
-readonly nc_bg_cyan=`tput setab 6`
-readonly nc_magenta=`tput setaf 5`
-readonly nc_bg_magenta=`tput setab 5`
-readonly nc_red=`tput setaf 1`
-readonly nc_bg_red=`tput setab 1`
-readonly nc_white=`tput setaf 7`
-readonly nc_bg_white=`tput setab 7`
-readonly nc_green=`tput setaf 2`
-readonly nc_bg_green=`tput setab 2`
-readonly nc_yellow=`tput setaf 3`
-readonly nc_bg_yellow=`tput setab 3`
-readonly nc_blue=`tput setaf 4`
-readonly nc_bg_blue=`tput setab 4`
-readonly nc_end=`tput sgr0`
 
-readonly NC_Bold=`tput bold`
-readonly NC_No=`tput sgr0` # No Color
-readonly NC_Black='\033[0;30m'
-readonly NC_Green='\033[0;32m'
-readonly NC_Red=$nc_bold$nc_red
-readonly NC_BrownOrange='\033[0;33m'
-readonly NC_Blue='\033[0;34m'
-readonly NC_Purple='\033[0;35m'
-readonly NC_Cyan='\033[0;36m'
-readonly NC_LightGray='\033[0;37m'
-readonly NC_DarkGray='\033[1;30m'
-readonly NC_LightRed='\033[1;31m'
-readonly NC_LightGreen='\033[1;32m'
-readonly NC_Yellow=$nc_yellow
-readonly NC_LightBlue='\033[1;34m'
-readonly NC_LightPurple='\033[1;35m'
-readonly NC_LightCyan='\033[1;36m'
-readonly NC_White=$nc_white
+if [ -t 1 ]; then
+  readonly nc_bold=`tput setaf 0`
+  readonly nc_bg_bold=`tput setab 0`
+  readonly nc_black=`tput setab 0`
+  readonly nc_bg_black=`tput setab 0`
+  readonly nc_cyan=`tput setaf 6`
+  readonly nc_bg_cyan=`tput setab 6`
+  readonly nc_magenta=`tput setaf 5`
+  readonly nc_bg_magenta=`tput setab 5`
+  readonly nc_red=`tput setaf 1`
+  readonly nc_bg_red=`tput setab 1`
+  readonly nc_white=`tput setaf 7`
+  readonly nc_bg_white=`tput setab 7`
+  readonly nc_green=`tput setaf 2`
+  readonly nc_bg_green=`tput setab 2`
+  readonly nc_yellow=`tput setaf 3`
+  readonly nc_bg_yellow=`tput setab 3`
+  readonly nc_blue=`tput setaf 4`
+  readonly nc_bg_blue=`tput setab 4`
+  readonly nc_end=`tput sgr0`
 
-readonly NC_error=$NC_Red
+  readonly NC_Bold=`tput bold`
+  readonly NC_No=`tput sgr0` # No Color
+  readonly NC_Black='\033[0;30m'
+  readonly NC_Green='\033[0;32m'
+  readonly NC_Red=$nc_bold$nc_red
+  readonly NC_BrownOrange='\033[0;33m'
+  readonly NC_Blue='\033[0;34m'
+  readonly NC_Purple='\033[0;35m'
+  readonly NC_Cyan='\033[0;36m'
+  readonly NC_LightGray='\033[0;37m'
+  readonly NC_DarkGray='\033[1;30m'
+  readonly NC_LightRed='\033[1;31m'
+  readonly NC_LightGreen='\033[1;32m'
+  readonly NC_Yellow=$nc_yellow
+  readonly NC_LightBlue='\033[1;34m'
+  readonly NC_LightPurple='\033[1;35m'
+  readonly NC_LightCyan='\033[1;36m'
+  readonly NC_White=$nc_white
+
+  readonly NC_error=$NC_Red
+fi
 ## #Public functions:
 ##
 ## ##Logging