File: pad.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 # pad [options...] [files...]
  27 #
  28 # PAD lines by adding trailing spaces to match the widest line.
  29 #
  30 # The only option available is to show this help message, using any of
  31 # `-h`, `--h`, `-help`, or `--help`, without the quotes.
  32 
  33 
  34 case "$1" in
  35     -h|--h|-help|--help)
  36         awk '/^# +pad /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  37         exit 0
  38     ;;
  39 esac
  40 
  41 [ "$1" = '--' ] && shift
  42 
  43 awk '
  44     {
  45         plain = $0
  46         gsub(/\x1b\[[0-9;]*[A-Za-z]/, "", plain)
  47         l = length(plain)
  48         if (width < l) width = l
  49 
  50         lines[NR] = $0
  51     }
  52 
  53     END {
  54         for (i = 1; i <= NR; i++) {
  55             plain = lines[i]
  56             gsub(/\x1b\[[0-9;]*[A-Za-z]/, "", plain)
  57             l = length(plain)
  58 
  59             printf "%s", lines[i]
  60             for (j = l + 1; j <= width; j++) printf " "
  61             print ""
  62         }
  63     }
  64 ' "$@"