File: fifi.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 # fifi [options...] [regex...] [folders...]
  27 #
  28 # FInd FIles using a case-insensitive regular expression, looking recursively
  29 # in all the folders given, or just the current folder by default. When not
  30 # even given a regex, all files will match by default.
  31 #
  32 # The only options show this help message, via any of `-h`, `--h`, `-help`,
  33 # or `--help`.
  34 
  35 
  36 case "$1" in
  37     -h|--h|-help|--help)
  38         awk '/^# +fifi /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  39         exit 0
  40     ;;
  41 esac
  42 
  43 what="${1:-.}"
  44 [ $# -gt 0 ] && shift
  45 
  46 for arg in "${@:-.}"; do
  47     if [ ! -d "${arg}" ]; then
  48         printf "\e[31mno folder named %s\e[0m\n" "${arg}" > /dev/stderr
  49         return 1
  50     fi
  51     stdbuf -oL find "${arg}" -type f
  52 done | awk -v what="${what}" '
  53     BEGIN {
  54         if (IGNORECASE == "") {
  55             m = "this variant of AWK lacks case-insensitive regex-matching"
  56             printf("\x1b[31m%s\x1b[0m\n", m) > "/dev/stderr"
  57             exit 125
  58         }
  59         IGNORECASE = 1
  60     }
  61 
  62     $0 ~ what { got++; print; fflush() }
  63     END { exit(got == 0) }
  64 '