File: transpose.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 # transpose [options...] [files...]
  27 #
  28 # Switch rows and columns from tables.
  29 #
  30 # The options are, available both in single and double-dash versions
  31 #
  32 #   -h, -help    show this help message
  33 
  34 
  35 # This version is compatible with busybox/alpine-linux.
  36 
  37 case "$1" in
  38     -h|--h|-help|--help)
  39         awk '/^# +transpose /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  40         exit 0
  41     ;;
  42 
  43     -) ;;
  44 
  45     --) shift ;;
  46 
  47     -*)
  48         printf "unsupported option '%s'\n" "$1" >&2
  49         exit 1
  50     ;;
  51 esac
  52 
  53 # show all non-existing files given
  54 failed=0
  55 for arg in "$@"; do
  56     [ "${arg}" = "-" ] && continue
  57     [ -e "${arg}" ] && continue
  58     printf "no file named \"%s\"\n" "${arg}" >&2
  59     failed=1
  60 done
  61 
  62 [ "${failed}" -gt 0 ] && exit 2
  63 
  64 awk '
  65     BEGIN { if (SUBSEP == "") SUBSEP = "\034" }
  66 
  67     { gsub(/\r$/, "") }
  68 
  69     FNR == 1 { FS = /\t/ ? "\t" : " "; $0 = $0 }
  70 
  71     {
  72         for (i = 1; i <= NF; i++) lines[i SUBSEP NR] = $i
  73         if (ncols < NF) ncols = NF
  74     }
  75 
  76     END {
  77         for (j = 1; j <= ncols; j++) {
  78             for (i = 1; i <= NR; i++) {
  79                 if (i > 1) printf "\t"
  80                 printf "%s", lines[j SUBSEP i]
  81             }
  82             print ""
  83         }
  84     }
  85 ' "$@"