.bin/bash-colors

   1 #!/bin/bash
   2 # Author: Mike Frysinger <vapier@gmail.com>; released into the public domain; suck it.
   3
   4 show_env() {
   5         local c colors=(
   6                 GOOD="\$'\e[32;01m'"
   7                 WARN="\$'\e[33;01m'"
   8                 BAD="\$'\e[31;01m'"
   9                 HILITE="\$'\e[36;01m'"
  10                 BRACKET="\$'\e[34;01m'"
  11                 NORMAL="\$'\e[0m'"
  12         )
  13         for c in "${colors[@]}" ; do
  14                 [[ -t 0 ]] || c="${c%=*}="
  15                 echo "${c}"
  16         done
  17 }
  18
  19 check256() {
  20         if [[ ${TERM} != *-256color ]] ; then
  21                 (
  22                 echo "warning: TERM (${TERM}) does not end in '-256color';"
  23                 echo "warning: trying to use 256 colors might not work."
  24                 ) >&2
  25         fi
  26 }
  27
  28 showit() {
  29         echo -e '\e['"${1};${2}mthis color is: \\\\e[${1};${2}m    \e[0m"
  30 }
  31
  32 main() {
  33         case $1 in
  34         --env)
  35                 show_env
  36                 ;;
  37         ""|16|system)
  38                 for i in {0..1} ; do
  39                         for j in {30..37} ; do
  40                                 showit ${i} ${j}
  41                         done
  42                 done
  43                 ;;
  44         cube|6x6x6)
  45                 check256
  46                 for n in {16..231} ; do
  47                         showit "38;05" $(printf '%03i' ${n})
  48                 done
  49                 ;;
  50         gr[ae]y)
  51                 check256
  52                 for n in {232..255} ; do
  53                         showit "38;05" ${n}
  54                 done
  55                 ;;
  56         all|256)
  57                 for x in system cube gray ; do
  58                         echo "### SET: ${x}"
  59                         "$0" ${x}
  60                 done
  61                 ;;
  62         *)
  63                 cat <<-EOF
  64                         usage: $0 [colors]
  65
  66                         Colors:
  67                          - --env        - show env you can eval in a shell
  68                          - 16, system   - show basic colors (default)
  69                          - cube, 6x6x6  - show most extended colors
  70                          - gray         - show gray scale
  71                          - all, 256     - show all colors
  72                 EOF
  73                 exit 1
  74                 ;;
  75         esac
  76 }
  77 main "$@"