File: transpose.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 # transpose [filepaths...]
  27 #
  28 # Switch rows and columns from tables.
  29 
  30 
  31 case "$1" in
  32     -h|--h|-help|--help)
  33         awk '/^# +transpose /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  34         exit 0
  35     ;;
  36 esac
  37 
  38 [ "$1" = "--" ] && shift
  39 
  40 # show all non-existing files given
  41 failed=0
  42 for arg in "$@"; do
  43     if [ "${arg}" = "-" ]; then
  44         continue
  45     fi
  46     if [ ! -e "${arg}" ]; then
  47         printf "no file named \"%s\"\n" "${arg}" > /dev/stderr
  48         failed=1
  49     fi
  50 done
  51 
  52 if [ "${failed}" -gt 0 ]; then
  53     exit 2
  54 fi
  55 
  56 awk '
  57     { gsub(/\r$/, "") }
  58 
  59     FNR == 1 { FS = ($0 ~ /\t/) ? "\t" : " "; $0 = $0 }
  60 
  61     {
  62         for (i = 1; i <= NF; i++) lines[i][NR] = $i
  63         if (maxitems < NF) maxitems = NF
  64     }
  65 
  66     END {
  67         for (j = 1; j <= maxitems; j++) {
  68             for (i = 1; i <= NR; i++) {
  69                 if (i > 1) printf "\t"
  70                 printf "%s", lines[j][i]
  71             }
  72             printf "\n"
  73         }
  74     }
  75 ' "$@"