Merge pull request #137 from DannyBen/add/no-colors

Add support for NO_COLORS

Author: DannyBen

examples/colors/src/lib/colors.sh

@@ -4,29 +4,42 @@
 #
 # Usage:
 # Use any of the functions below to color or format a portion of a string.
-# 
+#
 #   echo "before $(red this is red) after"
 #   echo "before $(green_bold this is green_bold) after"
 #
+# Color output will be disabled if `NO_COLOR` environment variable is set
+# in compliance with https://no-color.org/
+#
 # ---
 
-red() { printf "\e[31m%b\e[0m\n" "$*"; }
-green() { printf "\e[32m%b\e[0m\n" "$*"; }
-yellow() { printf "\e[33m%b\e[0m\n" "$*"; }
-blue() { printf "\e[34m%b\e[0m\n" "$*"; }
-magenta() { printf "\e[35m%b\e[0m\n" "$*"; }
-cyan() { printf "\e[36m%b\e[0m\n" "$*"; }
-bold() { printf "\e[1m%b\e[0m\n" "$*"; }
-underlined() { printf "\e[4m%b\e[0m\n" "$*"; }
-red_bold() { printf "\e[1;31m%b\e[0m\n" "$*"; }
-green_bold() { printf "\e[1;32m%b\e[0m\n" "$*"; }
-yellow_bold() { printf "\e[1;33m%b\e[0m\n" "$*"; }
-blue_bold() { printf "\e[1;34m%b\e[0m\n" "$*"; }
-magenta_bold() { printf "\e[1;35m%b\e[0m\n" "$*"; }
-cyan_bold() { printf "\e[1;36m%b\e[0m\n" "$*"; }
-red_underlined() { printf "\e[4;31m%b\e[0m\n" "$*"; }
-green_underlined() { printf "\e[4;32m%b\e[0m\n" "$*"; }
-yellow_underlined() { printf "\e[4;33m%b\e[0m\n" "$*"; }
-blue_underlined() { printf "\e[4;34m%b\e[0m\n" "$*"; }
-magenta_underlined() { printf "\e[4;35m%b\e[0m\n" "$*"; }
-cyan_underlined() { printf "\e[4;36m%b\e[0m\n" "$*"; }
+print_in_color() {
+  local color="$1"
+  shift
+  if [[ -z ${NO_COLOR+x} ]]; then
+    printf "$color%b\e[0m\n" "$*";
+  else
+    printf "%b\n" "$*";
+  fi
+}
+
+red() { print_in_color "\e[31m" "$*"; }
+green() { print_in_color "\e[32m" "$*"; }
+yellow() { print_in_color "\e[33m" "$*"; }
+blue() { print_in_color "\e[34m" "$*"; }
+magenta() { print_in_color "\e[35m" "$*"; }
+cyan() { print_in_color "\e[36m" "$*"; }
+bold() { print_in_color "\e[1m" "$*"; }
+underlined() { print_in_color "\e[4m" "$*"; }
+red_bold() { print_in_color "\e[1;31m" "$*"; }
+green_bold() { print_in_color "\e[1;32m" "$*"; }
+yellow_bold() { print_in_color "\e[1;33m" "$*"; }
+blue_bold() { print_in_color "\e[1;34m" "$*"; }
+magenta_bold() { print_in_color "\e[1;35m" "$*"; }
+cyan_bold() { print_in_color "\e[1;36m" "$*"; }
+red_underlined() { print_in_color "\e[4;31m" "$*"; }
+green_underlined() { print_in_color "\e[4;32m" "$*"; }
+yellow_underlined() { print_in_color "\e[4;33m" "$*"; }
+blue_underlined() { print_in_color "\e[4;34m" "$*"; }
+magenta_underlined() { print_in_color "\e[4;35m" "$*"; }
+cyan_underlined() { print_in_color "\e[4;36m" "$*"; }

examples/colors/test.sh

@@ -2,8 +2,10 @@
 
 set -x
 
+bashly add colors --force
 bashly generate
 
 ### Try Me ###
 
 ./colorly
+NO_COLOR=1 ./colorly

lib/bashly/templates/lib/colors.sh

@@ -4,29 +4,42 @@
 #
 # Usage:
 # Use any of the functions below to color or format a portion of a string.
-# 
+#
 #   echo "before $(red this is red) after"
 #   echo "before $(green_bold this is green_bold) after"
 #
+# Color output will be disabled if `NO_COLOR` environment variable is set
+# in compliance with https://no-color.org/
+#
 # ---
 
-red() { printf "\e[31m%b\e[0m\n" "$*"; }
-green() { printf "\e[32m%b\e[0m\n" "$*"; }
-yellow() { printf "\e[33m%b\e[0m\n" "$*"; }
-blue() { printf "\e[34m%b\e[0m\n" "$*"; }
-magenta() { printf "\e[35m%b\e[0m\n" "$*"; }
-cyan() { printf "\e[36m%b\e[0m\n" "$*"; }
-bold() { printf "\e[1m%b\e[0m\n" "$*"; }
-underlined() { printf "\e[4m%b\e[0m\n" "$*"; }
-red_bold() { printf "\e[1;31m%b\e[0m\n" "$*"; }
-green_bold() { printf "\e[1;32m%b\e[0m\n" "$*"; }
-yellow_bold() { printf "\e[1;33m%b\e[0m\n" "$*"; }
-blue_bold() { printf "\e[1;34m%b\e[0m\n" "$*"; }
-magenta_bold() { printf "\e[1;35m%b\e[0m\n" "$*"; }
-cyan_bold() { printf "\e[1;36m%b\e[0m\n" "$*"; }
-red_underlined() { printf "\e[4;31m%b\e[0m\n" "$*"; }
-green_underlined() { printf "\e[4;32m%b\e[0m\n" "$*"; }
-yellow_underlined() { printf "\e[4;33m%b\e[0m\n" "$*"; }
-blue_underlined() { printf "\e[4;34m%b\e[0m\n" "$*"; }
-magenta_underlined() { printf "\e[4;35m%b\e[0m\n" "$*"; }
-cyan_underlined() { printf "\e[4;36m%b\e[0m\n" "$*"; }
+print_in_color() {
+  local color="$1"
+  shift
+  if [[ -z ${NO_COLOR+x} ]]; then
+    printf "$color%b\e[0m\n" "$*";
+  else
+    printf "%b\n" "$*";
+  fi
+}
+
+red() { print_in_color "\e[31m" "$*"; }
+green() { print_in_color "\e[32m" "$*"; }
+yellow() { print_in_color "\e[33m" "$*"; }
+blue() { print_in_color "\e[34m" "$*"; }
+magenta() { print_in_color "\e[35m" "$*"; }
+cyan() { print_in_color "\e[36m" "$*"; }
+bold() { print_in_color "\e[1m" "$*"; }
+underlined() { print_in_color "\e[4m" "$*"; }
+red_bold() { print_in_color "\e[1;31m" "$*"; }
+green_bold() { print_in_color "\e[1;32m" "$*"; }
+yellow_bold() { print_in_color "\e[1;33m" "$*"; }
+blue_bold() { print_in_color "\e[1;34m" "$*"; }
+magenta_bold() { print_in_color "\e[1;35m" "$*"; }
+cyan_bold() { print_in_color "\e[1;36m" "$*"; }
+red_underlined() { print_in_color "\e[4;31m" "$*"; }
+green_underlined() { print_in_color "\e[4;32m" "$*"; }
+yellow_underlined() { print_in_color "\e[4;33m" "$*"; }
+blue_underlined() { print_in_color "\e[4;34m" "$*"; }
+magenta_underlined() { print_in_color "\e[4;35m" "$*"; }
+cyan_underlined() { print_in_color "\e[4;36m" "$*"; }

spec/approvals/examples/colors

@@ -1,3 +1,5 @@
++ bashly add colors --force
+created src/lib/colors.sh
 + bashly generate
 creating user files in src
 skipped src/initialize.sh (exists)
@@ -11,3 +13,11 @@ Message Recevied:
   ==> hello colors
   ===> hello colors
 
++ NO_COLOR=1
++ ./colorly
+Message Recevied:
+
+  => hello colors
+  ==> hello colors
+  ===> hello colors
+