File: cs.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright © 2025 pacman64
   6 #
   7 # Permission is hereby granted, free of charge, to any person obtaining a copy
   8 # of this software and associated documentation files (the “Software”), to deal
   9 # in the Software without restriction, including without limitation the rights
  10 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11 # copies of the Software, and to permit persons to whom the Software is
  12 # furnished to do so, subject to the following conditions:
  13 #
  14 # The above copyright notice and this permission notice shall be included in
  15 # all copies or substantial portions of the Software.
  16 #
  17 # THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23 # SOFTWARE.
  24 
  25 
  26 # cs [filenames...]
  27 #
  28 # Color Syntax: run syntax-coloring app `bat` without line-wrapping, using
  29 # colors which are readable even on light backgrounds.
  30 
  31 
  32 case "$1" in
  33     -h|--h|-help|--help)
  34         awk '/^# +cs /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  35         exit 0
  36     ;;
  37 esac
  38 
  39 [ "$1" = "--" ] && shift
  40 
  41 cmd='bat'
  42 # debian linux uses a different name for the `bat` app
  43 if [ -e '/usr/bin/batcat' ]; then
  44     cmd='batcat'
  45 fi
  46 
  47 names=0
  48 failed=0
  49 for arg in "$@"; do
  50     if [ "${arg}" = '--' ]; then
  51         names=0
  52         continue
  53     fi
  54 
  55     if [ ! -e "${arg}" ]; then
  56         printf "no file named \"%s\"\n" "${arg}" > /dev/stderr
  57         failed=1
  58     fi
  59 
  60     names=$((names + 1))
  61 done
  62 
  63 if [ "${failed}" -gt 0 ]; then
  64     exit 2
  65 fi
  66 
  67 options='-MKiCRS'
  68 if [ "${names}" -lt 2 ]; then
  69     options='-MKiCRS --header=1'
  70 fi
  71 
  72 "${cmd}" \
  73     --style=plain,header,numbers \
  74     --theme='Monokai Extended Light' \
  75     --wrap=never --color=always --paging=never "$@" 2>&1 |
  76 # make colors readable even on light backgrounds
  77 sed -e 's-\x1b\[38;5;70m-\x1b[38;5;28m-g' \
  78     -e 's-\x1b\[38;5;214m-\x1b[38;5;208m-g' \
  79     -e 's-\x1b\[38;5;243m-\x1b[38;5;103m-g' \
  80     -e 's-\x1b\[38;5;238m-\x1b[38;5;245m-g' \
  81     -e 's-\x1b\[38;5;228m-\x1b[48;5;228m-g' |
  82 less "${options}"