File: nts.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 # nts [options...] [files...]
  27 #
  28 # Nice TimeStamp styles the leading timestamp on lines using ANSI codes,
  29 # using a tab to separate it from the line content. File-input is available,
  30 # even if typical uses-cases are for timestamping live stdin lines.
  31 #
  32 # The options are, available both in single and double-dash versions
  33 #
  34 #   -h, -help    show this help message
  35 #   -plain       don't style timestamps with ANSI codes
  36 
  37 
  38 style='\x1b[48;2;218;218;218m\x1b[38;2;0;95;153m'
  39 
  40 case "$1" in
  41     -h|--h|-help|--help)
  42         awk '/^# +nts /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  43         exit 0
  44     ;;
  45 
  46     -plain|--plain) style=''; shift ;;
  47 
  48     --) ;;
  49 
  50     -*)
  51         printf "unsupported option '%s'\n" "$1" >&2
  52         exit 1
  53     ;;
  54 esac
  55 
  56 # show all non-existing files given
  57 failed=0
  58 for arg in "$@"; do
  59     [ "${arg}" = "-" ] && continue
  60     [ -e "${arg}" ] && continue
  61     printf "no file named \"%s\"\n" "${arg}" >&2
  62     failed=1
  63 done
  64 
  65 [ "${failed}" -gt 0 ] && exit 2
  66 
  67 if [ "${NO_COLOR}" = 1 ]; then
  68     # style=''
  69     style='\x1b[7m'
  70 fi
  71 
  72 # busybox's `ts` doesn't update/flush lines live, so avoid `ts` just in case
  73 
  74 awk -v style="${style}" '
  75     BEGIN { fmt = (style == "") ? "%s\t%s\n" : (style "%s\x1b[0m\t%s\n") }
  76     { printf(fmt, strftime("%Y-%m-%d %H:%M:%S"), $0); fflush() }
  77 ' "$@"