2 # I, Ian Kelling, follow the GNU license recommendations at
3 # https://www.gnu.org/licenses/license-recommendations.en.html. They
4 # recommend that small programs, < 300 lines, be licensed under the
5 # Apache License 2.0. This file contains or is part of one or more small
6 # programs. If a small program grows beyond 300 lines, I plan to switch
9 # Copyright 2024 Ian Kelling
11 # Licensed under the Apache License, Version 2.0 (the "License");
12 # you may not use this file except in compliance with the License.
13 # You may obtain a copy of the License at
15 # http://www.apache.org/licenses/LICENSE-2.0
17 # Unless required by applicable law or agreed to in writing, software
18 # distributed under the License is distributed on an "AS IS" BASIS,
19 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
20 # See the License for the specific language governing permissions and
21 # limitations under the License.
25 local help="Usage: teeu [-h|--help] FILE [LINE]
26 Append LINE if it's not already in FILE
28 If no LINE is specified, process each line from STDIN.
29 teeu is short for tee unique.
31 -h|--help display this message"
33 if [[ $1 == --help ||
$1 == -h ]]; then
38 if (( ${#@} == 0 )) ; then
39 echo "teeu error: need 1 or more arguments"
51 for line
in "${MAPFILE[@]}"; do
52 grep -xFq "$line" "$file" &>/dev
/null ||
tee -a "$file" <<<"$line"