File: showrun.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 # showrun [options...] [command...] [args...]
  27 #
  28 # SHOW a command as a highlighted line of text, then RUN it.
  29 #
  30 # The options are, available both in single and double-dash versions
  31 #
  32 #   -h        show this help message
  33 #   -help     show this help message
  34 #
  35 #   -e        merge stderr into main output
  36 #   -err      merge stderr into main output
  37 #   -error    merge stderr into main output
  38 
  39 
  40 case "$1" in
  41     -h|--h|-help|--help)
  42         awk '/^# +showrun /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  43         exit 0
  44     ;;
  45 esac
  46 
  47 merge_stderr=0
  48 less_options='-MKiCRS --header=1'
  49 for arg in "$@"; do
  50     case "${arg}" in
  51         -e|--e|-err|--err|-error|--error|-errors|--errors)
  52             merge_stderr=1
  53             shift
  54         ;;
  55         -n|--n|-N|--N)
  56             less_options="${less_options} -N"
  57             shift
  58         ;;
  59         *)
  60             break
  61         ;;
  62     esac
  63 done
  64 
  65 [ "$1" = "--" ] && shift
  66 
  67 if [ $# -eq 0 ]; then
  68     awk '/^# +showrun /, /^$/ { gsub(/^# ?/, ""); print }' "$0" >&2
  69     exit 0
  70 fi
  71 
  72 if [ "${merge_stderr}" -eq 0 ]; then
  73     { printf "\e[7m%s\e[0m\n" "$*"; "$@"; }
  74 else
  75     { printf "\e[7m%s\e[0m\n" "$*"; "$@" 2>&1; }
  76 fi | less "${less_options}"