File: tcatl.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 # tcatl [options...] [files...]
  27 #
  28 # Titled conCATenate Lines ensures no lines across inputs are accidentally
  29 # joined, since all lines it outputs end with line-feeds, even when the
  30 # original files don't. It also highlights the filename, before emitting its
  31 # lines.
  32 #
  33 # The options are, available both in single and double-dash versions
  34 #
  35 #   -h, -help    show this help message
  36 #   -0, -null    turn null-byte-delimited chunks into proper lines
  37 
  38 
  39 nulled=0
  40 buffered=0
  41 
  42 while [ $# -gt 0 ]; do
  43     case "$1" in
  44         -b|--b|-buffered|--buffered)
  45             buffered=1
  46             shift
  47             continue
  48         ;;
  49 
  50         -h|--h|-help|--help)
  51             awk '/^# +tcatl /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  52             exit 0
  53         ;;
  54 
  55         -0|--0|-null|--null)
  56             nulled=1
  57             shift
  58             continue
  59         ;;
  60     esac
  61 
  62     break
  63 done
  64 
  65 [ "$1" = '--' ] && shift
  66 
  67 # show all non-existing files given
  68 failed=0
  69 for arg in "$@"; do
  70     if [ "${arg}" = "-" ]; then
  71         continue
  72     fi
  73     if [ ! -e "${arg}" ]; then
  74         printf "no file named \"%s\"\n" "${arg}" >&2
  75         failed=1
  76     fi
  77 done
  78 
  79 if [ "${failed}" -gt 0 ]; then
  80     exit 2
  81 fi
  82 
  83 flush=0
  84 if [ "${buffered}" -eq 0 ] && { [ -p /dev/stdout ] || [ -t 1 ]; }; then
  85     flush=1
  86 fi
  87 
  88 dashes=0
  89 for arg in "$@"; do
  90     if [ "${arg}" = "-" ]; then
  91         if [ "${dashes}" -ne 0 ]; then
  92             continue
  93         fi
  94         printf "\e[7m%-80s\e[0m\n" '<stdin>'
  95         dashes=1
  96     else
  97         printf "\e[7m%-80s\e[0m\n" "${arg}"
  98     fi
  99 
 100     if [ "${nulled}" -eq 0 ]; then
 101         awk -v flush="${flush}" '{ print; if (flush) fflush() }' "$@"
 102     else
 103         awk -v RS='\000' -v flush="${flush}" \
 104             '{ print; if (flush) fflush() }' "$@"
 105     fi
 106 done
 107 
 108 if [ $# -eq 0 ]; then
 109     printf "\e[7m%-80s\e[0m\n" '<stdin>'
 110     if [ "${nulled}" -eq 0 ]; then
 111         awk -v flush="${flush}" '{ print; if (flush) fflush() }' -
 112     else
 113         awk -v RS='\000' -v flush="${flush}" '{ print; if (flush) fflush() }' -
 114     fi
 115 fi