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     if [[ $1 == --help || $1 == -h ]]; then
  13         echo "$help"
  14         return
  15     fi
  16
  17     if (( ${#@} == 0 )) ; then
  18         echo "teeu error: need 1 or more arguments"
  19         echo "$help"
  20         return 1
  21     fi
  22     local MAPFILE
  23     (( ${#@} >= 2 )) && MAPFILE="${@:2}" || mapfile -t
  24     for line in "${MAPFILE[@]}"; do
  25         grep -xFq "$line" "$1" &>/dev/null || tee -a "$1" <<<"$line"
  26     done
  27     return 0
  28 }
  29 teeu "$@"