File: gbm.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright © 2020-2025 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 # gbm [good...] [bad...] [meh...]
  27 #
  28 # Good, Bad, Meh colors lines using up to 3 regular expressions, keeping all
  29 # other input lines verbatim.
  30 
  31 
  32 case "$1" in
  33     -h|--h|-help|--help)
  34         awk '/^# +gbm /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  35         exit 0
  36     ;;
  37 esac
  38 
  39 [ "$1" = "--" ] && shift
  40 
  41 command="awk"
  42 if [ -p 1 ] || [ -t 1 ]; then
  43     command="stdbuf -oL awk"
  44 fi
  45 
  46 good="$1"
  47 bad="$2"
  48 meh="$3"
  49 [ $# -gt 0 ] && shift
  50 [ $# -gt 0 ] && shift
  51 [ $# -gt 0 ] && shift
  52 
  53 ${command} '
  54     BEGIN {
  55         gotgood = ARGC > 1 && ARGV[1] != ""
  56         gotbad = ARGC > 2 && ARGV[2] != ""
  57         gotmeh = ARGC > 3 && ARGV[3] != ""
  58         good = ARGV[1]
  59         bad = ARGV[2]
  60         meh = ARGV[3]
  61         delete ARGV[1]
  62         delete ARGV[2]
  63         delete ARGV[3]
  64     }
  65 
  66     gotgood && $0 ~ good {
  67         # code to use a color-blind-friendlier blue, instead of green
  68         # gsub(/\x1b\[0m/, "\x1b[0m\x1b[38;2;0;95;215m")
  69         # printf "\x1b[38;2;0;95;215m%s\x1b[0m\n", $0
  70         gsub(/\x1b\[0m/, "\x1b[0m\x1b[38;2;0;135;95m")
  71         printf "\x1b[38;2;0;135;95m%s\x1b[0m\n", $0
  72         next
  73     }
  74 
  75     gotbad && $0 ~ bad {
  76         gsub(/\x1b\[0m/, "\x1b[0m\x1b[38;2;204;0;0m")
  77         printf "\x1b[38;2;204;0;0m%s\x1b[0m\n", $0
  78         next
  79     }
  80 
  81     gotmeh && $0 ~ meh {
  82         gsub(/\x1b\[0m/, "\x1b[0m\x1b[38;2;168;168;168m")
  83         printf "\x1b[38;2;168;168;168m%s\x1b[0m\n", $0
  84         next
  85     }
  86 
  87     1
  88 ' "${good}" "${bad}" "${meh}" "$@"