iankelling.org Git - tee-unique/blob - teeu

   1 #!/bin/bash
   2 # Copyright (C) 2014 Ian Kelling
   3 # This program is under GPL v. 3 or later, see <http://www.gnu.org/licenses/>
   4
   5 teeu() {
   6     local help="Usage: appendu [-h|--help] FILE [LINE]
   7
   8 Tee unique. Append each LINE or if none, each stdin line to FILE if it does not exist in FILE.
   9
  10   [-h|--help]  display this message"
  11
  12
  13     if [[ $1 == --help || $1 == -h ]]; then
  14         echo "$help"
  15         return
  16     fi
  17
  18     if (( ${#@} == 0 )) ; then
  19         echo "teeu error: need 1 or more arguments"
  20         echo "$help"
  21         return 1
  22     fi
  23     local file="$1"; shift
  24
  25     local MAPFILE
  26     mapfile -t
  27     for line in "${@:-$MAPFILE[@]}"; do
  28         grep -xFq "$line" "$1" &>/dev/null || tee -a "$1" <<<"$line"
  29     done
  30     return 0
  31 }
  32 teeu "$@"