File: topfolders.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright © 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 # topfolders [options...] [folders...]
  27 #
  28 # Show all top-level folders in all the folders given, digging recursively
  29 # into any/all subfolders. When not given any folder, the current one is used
  30 # 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         if [ ! -d "$1" ]; then
  39             awk '/^# +topfolders /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  40             exit 0
  41         fi
  42     ;;
  43 esac
  44 
  45 code=0
  46 for arg in "$@"; do
  47     if [ ! -e "${arg}" ]; then
  48         printf "\e[31mno file/folder named %s\e[0m\n" "${arg}" > /dev/stderr
  49         code=1
  50     fi
  51 done
  52 
  53 if [ "${code}" -ne 0 ]; then
  54     exit "${code}"
  55 fi
  56 
  57 for arg in "${@:-.}"; do
  58     if [ -f "${arg}" ]; then
  59         continue
  60     fi
  61     if [ ! -d "${arg}" ]; then
  62         printf "\e[31mno folder named %s\e[0m\n" "${arg}" > /dev/stderr
  63     fi
  64     stdbuf -oL find "${arg}" -maxdepth 1 -type d |
  65         awk '!/^\.$/ { print; fflush() }'
  66 done | awk '!c[$0]++ { print; fflush() }'