File: runeach.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 # runeach [option...] [command...] [args...]
  27 #
  28 #
  29 # RUN EACH shows each command about to run on stderr, then runs each command
  30 # using stdin lines to add a final argument to the arguments given explicitly
  31 #
  32 # The options are, available both in single and double-dash versions
  33 #
  34 #   -d, -dry, -dryrun, -dry-run
  35 #       run nothing, and show would-be completed commands to stdout
  36 #
  37 #   -h, -help
  38 #       show this help message
  39 #
  40 #   -q, -quiet, -s, -silent
  41 #       just run the commands, without showing them on stderr
  42 
  43 
  44 case "$1" in
  45     -h|--h|-help|--help)
  46         awk '/^# +runeach /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  47         exit 0
  48     ;;
  49 esac
  50 
  51 quiet=0
  52 dry_run=0
  53 
  54 case "$1" in
  55     -d|--d|-dry|--dry|-dryrun|--dryrun|-dry-run|--dry-run)
  56         dry_run=1
  57         shift
  58     ;;
  59 
  60     -q|--q|-quiet|--quiet|-s|--s|-silent|--silent)
  61         quiet=1
  62         shift
  63     ;;
  64 esac
  65 
  66 [ "$1" = '--' ] && shift
  67 
  68 cmd="$1"
  69 if [ $# -eq 0 ] || [ -z "${cmd}" ]; then
  70     awk '/^# +runeach /, /^$/ { gsub(/^# ?/, ""); print }' "$0" >&2
  71     exit 1
  72 fi
  73 [ $# -gt 0 ] && shift
  74 
  75 if [ $# -eq 0 ]; then
  76     pre="${cmd}"
  77 else
  78     pre="${cmd} $*"
  79 fi
  80 
  81 IFS="$(printf "\n")"
  82 
  83 while read -r line; do
  84     if echo "${line}" | grep -E -q '^ *\r?$'; then
  85         continue
  86     fi
  87 
  88     if [ "${dry_run}" -eq 1 ]; then
  89         printf "%s %s\n" "${pre}" "${line}"
  90         continue
  91     fi
  92 
  93     if [ "${quiet}" -eq 0 ]; then
  94         printf "\e[7m%s %s\e[0m\n" "${pre}" "${line}" >&2
  95     fi
  96 
  97     "${cmd}" "$@" "${line}"
  98 done