systemd/shell-completion/bash/systemd-resolve

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# shellcheck shell=bash
# systemd-resolve(1) completion -*- shell-script -*-
# SPDX-License-Identifier: LGPL-2.1-or-later
#
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# systemd is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with systemd; If not, see <https://www.gnu.org/licenses/>.
__contains_word () {
local w word=$1; shift
for w in "$@"; do
[[ $w = "$word" ]] && return
done
}
__get_interfaces(){
local name
for name in $(cd /sys/class/net && command ls); do
[[ "$name" != "lo" ]] && echo "$name"
done
}
_systemd-resolve() {
local i comps
local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
local -A OPTS=(
[STANDALONE]='-h --help --version --no-pager -4 -6
--service --openpgp --tlsa --status --statistics
--reset-statistics --service-address=no --service-txt=no
--cname=no --search=no --legend=no --flush-caches
--reset-server-features --revert'
[ARG]='-i --interface -p --protocol -t --type -c --class --raw
--set-dns --set-domain --set-llmnr --set-mdns --set-dnssec --set-nta'
)
if __contains_word "$prev" ${OPTS[ARG]}; then
case $prev in
--interface|-i)
comps=$( __get_interfaces )
;;
--protocol|-p|--type|-t|--class|-c)
comps=$( systemd-resolve --legend=no "$prev" help; echo help )
;;
--raw)
comps="payload packet"
;;
--set-dns|--set-domain|--set-nta)
comps=""
;;
--set-llmnr|--set-mdns)
comps="yes no resolve"
;;
--set-dnssec)
comps="yes no allow-downgrade"
;;
--set-dnsovertls)
comps="yes no opportunistic"
;;
esac
COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
return 0
fi
if [[ "$cur" = -* ]] || [[ -z ${comps-} ]]; then
COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
return 0
fi
}
complete -F _systemd-resolve systemd-resolve