File: cosy.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright (c) 2026 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 # cosy [options...] [files...]
  27 #
  28 # COlor SYntax: run syntax-coloring app `bat` without line-wrapping, using
  29 # colors which are readable even on light backgrounds.
  30 #
  31 # The options are, available both in single and double-dash versions
  32 #
  33 #   -h, -help    show this help message
  34 
  35 
  36 case "$1" in
  37     -h|--h|-help|--help)
  38         awk '/^# +cosy /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  39         exit 0
  40     ;;
  41 
  42     -) ;;
  43 
  44     --) shift ;;
  45 
  46     -*)
  47         printf "unsupported option '%s'\n" "$1" >&2
  48         exit 1
  49     ;;
  50 esac
  51 
  52 cmd='bat'
  53 # debian linux uses a different name for the `bat` app
  54 if [ -e /usr/bin/batcat ]; then
  55     cmd='batcat'
  56 fi
  57 
  58 names=0
  59 failed=0
  60 for arg in "$@"; do
  61     if [ "${arg}" = '--' ]; then
  62         names=0
  63         continue
  64     fi
  65 
  66     if [ ! -e "${arg}" ]; then
  67         printf "no file named \"%s\"\n" "${arg}" >&2
  68         failed=1
  69     fi
  70 
  71     names=$((names + 1))
  72 done
  73 
  74 [ "${failed}" -gt 0 ] && exit 2
  75 
  76 options='-MKiCRS'
  77 if [ "${names}" -lt 2 ]; then
  78     options='-MKiCRS --header=1'
  79 fi
  80 
  81 "${cmd}" \
  82     --style=plain,header,numbers \
  83     --theme='Monokai Extended Light' \
  84     --wrap=never --color=always --paging=never "$@" 2>&1 |
  85 # make colors readable even on light backgrounds
  86 sed -e 's-\x1b\[38;5;70m-\x1b[38;5;28m-g' \
  87     -e 's-\x1b\[38;5;214m-\x1b[38;5;208m-g' \
  88     -e 's-\x1b\[38;5;243m-\x1b[38;5;103m-g' \
  89     -e 's-\x1b\[38;5;238m-\x1b[38;5;245m-g' \
  90     -e 's-\x1b\[38;5;228m-\x1b[48;5;228m-g' |
  91 less ${options}