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

   1 #!/bin/bash
   2 # Copyright (C) 2016 Ian Kelling
   3
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16 teeu() {
  17     local help="Usage: appendu [-h|--help] FILE [LINE]
  18 Append LINE if it's not already in FILE
  19
  20 If no LINE is specified, process each line from STDIN.
  21 teeu is short for tee unique.
  22
  23 -h|--help  display this message"
  24
  25     if [[ $1 == --help || $1 == -h ]]; then
  26         echo "$help"
  27         return
  28     fi
  29
  30     if (( ${#@} == 0 )) ; then
  31         echo "teeu error: need 1 or more arguments"
  32         echo "$help"
  33         return 1
  34     fi
  35     local MAPFILE
  36     (( ${#@} >= 2 )) && MAPFILE="${@:2}" || mapfile -t
  37     for line in "${MAPFILE[@]}"; do
  38         grep -xFq "$line" "$1" &>/dev/null || tee -a "$1" <<<"$line"
  39     done
  40     return 0
  41 }
  42 teeu "$@"