File: hawk.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright © 2024 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 # hawk [awk condition...] [filenames...]
  27 #
  28 # Highlight (lines) satisfying an AWK condition/expression, keeping all other
  29 # lines the same. When not given a condition, all lines are highlighted.
  30 
  31 
  32 # handle help options
  33 # case "$1" in
  34 #     -h|--h|-help|--help)
  35 #         awk '/^# +hawk/, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  36 #         exit 0
  37 #     ;;
  38 # esac
  39 
  40 cond="${1:-1}"
  41 [ $# -gt 0 ] && shift
  42 
  43 awk '
  44     { low = lower = tolower($0) }
  45 
  46     '"${cond}"' {
  47         gsub(/\x1b\[0m/, "\x1b[0m\x1b[7m")
  48         printf "\x1b[7m%s\x1b[0m\n", $0
  49         fflush()
  50         next
  51     }
  52 
  53     {
  54         print
  55         fflush()
  56     }
  57 ' "$@"