base16-builder-bash/bash-template-builder at main · mtthlm/base16-builder-bash · GitHub

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#!/usr/bin/env bash
set -o errexit -o errtrace -o nounset -o pipefail

readonly ansiEsc='\033'
readonly ansiOsc="${ansiEsc}\135" \
         ansiSt="${ansiEsc}\134"

function :printf () {
  # shellcheck disable=SC2059
  printf -- "$1" "${@:2}"
}

function :printfln () {
  # shellcheck disable=SC2059
  printf -- "${1}\n" "${@:2}"
}

function :println () {
  :printfln '%s' "$@"
}

function :replace:all () {
  :println "${1//"$2"/"$3"}"
}

function :join () {
  :replace:all "$(:println "${@:2}")" $'\n' "$1"
}

function :ansi:osc () {
  :println "${ansiOsc}$(:join ';' "$1" "${@:2}")${ansiSt}"
}

function :print:ansi:osc:color:change () {
  : "${@: -1}"
  : "printf -- %q '{{${_}-hex-r}}' '{{${_}-hex-g}}' '{{${_}-hex-b}}'"
  :printfln "$_" "$(:ansi:osc "${@:1:$#-1}" 'rgb:%s/%s/%s')"
}

cat - <<'EOD'
#!/usr/bin/env bash
# base16-shell (https://github.com/chriskempson/base16-shell)
# Base16 Shell template by Matt Helm (https://github.com/mtthlm)
# {{scheme-name}} scheme by {{scheme-author}}
EOD

readonly -a args=(
  # 4-bit Colors
   4  0 'base00' # Black
   4  1 'base08' # Red
   4  2 'base0B' # Green
   4  3 'base0A' # Yellow
   4  4 'base0D' # Blue
   4  5 'base0E' # Magenta
   4  6 'base0C' # Cyan
   4  7 'base05' # White
  # 4-bit Bright Colors
   4  8 'base03' # Bright Black
   4  9 'base08' # Bright Red
   4 10 'base0B' # Bright Green
   4 11 'base0A' # Bright Yellow
   4 12 'base0D' # Bright Blue
   4 13 'base0E' # Bright Magenta
   4 14 'base0C' # Bright Cyan
   4 15 'base07' # Bright White
  # 8-bit Colors
   4 16 'base09'
   4 17 'base0F'
   4 18 'base01'
   4 19 'base02'
   4 20 'base04'
   4 21 'base06'
  # Foreground
  10    'base05'
  # Background
  11    'base00'
  # Cursor
  12    'base05'
)

set -- "${args[@]}"

while [[ $# -gt 1 ]]
do
  case "$1"
  in
    4)
      :print:ansi:osc:color:change "${@:1:3}"
      shift 1
      ;;
    *)
      :print:ansi:osc:color:change "${@:1:2}"
      ;;
  esac
  shift 2
done