File: folders.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 # folders [options...] [folders...]
  27 #
  28 # Show all folders in all the folders given, digging recursively into any/all
  29 # subfolders. When not given any folder name, the current one is used.
  30 #
  31 # Output is lines of absolute filepaths, one per line, without repetitions.
  32 #
  33 # The options are, available both in single and double-dash versions
  34 #
  35 #   -e, -empty    look only for empty folders
  36 #   -h, -help     show this help message
  37 #   -t, -top      limit search to top-level folders, ignoring subfolders
  38 
  39 
  40 empty=''
  41 max_depth=''
  42 
  43 while [ $# -gt 0 ]; do
  44     case "$1" in
  45         -e|--e|-empty|--empty) empty='-empty'; shift; continue ;;
  46 
  47         -h|--h|-help|--help)
  48             awk '/^# +folders /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  49             exit 0
  50         ;;
  51 
  52         -t|--t|-top|--top) max_depth='-maxdepth 1'; shift; continue ;;
  53 
  54         -) break ;;
  55 
  56         --) shift; break ;;
  57 
  58         -*)
  59             printf "unsupported option '%s'\n" "$1" >&2
  60             exit 1
  61         ;;
  62     esac
  63 
  64     break
  65 done
  66 
  67 options="-mindepth 1 ${max_depth} -type d ${empty}"
  68 
  69 for arg in "${@:-.}"; do
  70     [ ! -d "${arg}" ] && continue
  71 
  72     if echo "${arg}" | grep -q '/$'; then
  73         find "${arg}" ${options} -exec realpath {} +
  74     else
  75         find "${arg}/" ${options} -exec realpath {} +
  76     fi
  77 done | awk '!c[$0]++; END { exit(NR == 0) }'