shell-completion/bash/resolvectl

   1 # resolvectl(1) completion                                  -*- shell-script -*-
   2 # SPDX-License-Identifier: LGPL-2.1+
   3 #
   4 # This file is part of elogind.
   5 #
   6 # Copyright 2018 Yu Watanabe
   7 #
   8 # elogind is free software; you can redistribute it and/or modify it
   9 # under the terms of the GNU Lesser General Public License as published by
  10 # the Free Software Foundation; either version 2.1 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # elogind is distributed in the hope that it will be useful, but
  14 # WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16 # General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU Lesser General Public License
  19 # along with elogind; If not, see <http://www.gnu.org/licenses/>.
  20
  21 __contains_word () {
  22         local w word=$1; shift
  23         for w in "$@"; do
  24                 [[ $w = "$word" ]] && return
  25         done
  26 }
  27
  28 __get_interfaces(){
  29         { cd /sys/class/net && echo *; } | \
  30         while read -d' ' -r name; do
  31                 [[ "$name" != "lo" ]] && echo "$name"
  32         done
  33 }
  34
  35 _resolvectl() {
  36         local i comps verb name
  37         local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
  38         local -A OPTS=(
  39                [STANDALONE]='-h --help --version --no-pager -4 -6
  40                              --service-address=no --service-txt=no
  41                              --cname=no --search=no --legend=no'
  42                       [ARG]='-i --interface -p --protocol -t --type -c --class --raw'
  43         )
  44         local -A VERBS=(
  45                    [DOMAIN]='query service openpgp'
  46                    [FAMILY]='tlsa'
  47                    [STATUS]='status'
  48                      [LINK]='revert dns domain nta'
  49                   [RESOLVE]='llmnr mdns'
  50                    [DNSSEC]='dnssec'
  51                [STANDALONE]='statistics reset-statistics flush-caches reset-server-features'
  52         )
  53         local -A ARGS=(
  54                    [FAMILY]='tcp udp sctp'
  55                   [RESOLVE]='yes no resolve'
  56                    [DNSSEC]='yes no allow-downgrade'
  57         )
  58         local interfaces=$( __get_interfaces )
  59
  60         if __contains_word "$prev" ${OPTS[ARG]}; then
  61                 case $prev in
  62                         --interface|-i)
  63                                 comps="$interfaces"
  64                                 ;;
  65                         --protocol|-p|--type|-t|--class|-c)
  66                                 comps=$( resolvectl --legend=no "$prev" help; echo help )
  67                                 ;;
  68                         --raw)
  69                                 comps="payload packet"
  70                                 ;;
  71                 esac
  72                 COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
  73                 return 0
  74         fi
  75
  76         if [[ "$cur" = -* ]]; then
  77                 COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
  78                 return 0
  79         fi
  80
  81         for ((i=0; i < COMP_CWORD; i++)); do
  82                 if __contains_word "${COMP_WORDS[i]}" ${VERBS[*]} &&
  83                  ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
  84                         verb=${COMP_WORDS[i]}
  85                         break
  86                 fi
  87         done
  88
  89         if [[ -z $verb ]]; then
  90                 comps="${VERBS[*]}"
  91
  92         elif __contains_word "$verb" ${VERBS[STANDALONE]} ${VERBS[DOMAIN]}; then
  93                 comps=''
  94
  95         elif __contains_word "$verb" ${VERBS[STATUS]}; then
  96                 comps="$interfaces"
  97
  98         elif __contains_word "$verb" ${VERBS[FAMILY]}; then
  99                 for ((i++; i < COMP_CWORD; i++)); do
 100                         if __contains_word "${COMP_WORDS[i]}" ${ARGS[FAMILY]} &&
 101                          ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
 102                                 name=${COMP_WORDS[i]}
 103                                 break;
 104                         fi
 105                 done
 106                 if [[ -z $name ]]; then
 107                         comps=${ARGS[FAMILY]}
 108                 else
 109                         comps=""
 110                 fi
 111
 112         elif __contains_word "$verb" ${VERBS[LINK]} ${VERBS[RESOLVE]} ${VERBS[DNSSEC]}; then
 113                 for ((i++; i < COMP_CWORD; i++)); do
 114                         if __contains_word "${COMP_WORDS[i]}" $interfaces &&
 115                          ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
 116                                 name=${COMP_WORDS[i]}
 117                                 break;
 118                         fi
 119                 done
 120
 121                 if [[ -z $name ]]; then
 122                         comps="$interfaces"
 123
 124                 elif __contains_word "$verb" ${VERBS[RESOLVE]}; then
 125                         name=
 126                         for ((i++; i < COMP_CWORD; i++)); do
 127                                 if __contains_word "${COMP_WORDS[i]}" ${ARGS[RESOLVE]} &&
 128                                  ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
 129                                         name=${COMP_WORDS[i]}
 130                                         break;
 131                                 fi
 132                         done
 133
 134                         if [[ -z $name ]]; then
 135                                 comps=${ARGS[RESOLVE]}
 136                         else
 137                                 comps=''
 138                         fi
 139
 140                 elif __contains_word "$verb" ${VERBS[DNSSEC]}; then
 141                         name=
 142                         for ((i++; i < COMP_CWORD; i++)); do
 143                                 if __contains_word "${COMP_WORDS[i]}" ${ARGS[DNSSEC]} &&
 144                                  ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
 145                                         name=${COMP_WORDS[i]}
 146                                         break;
 147                                 fi
 148                         done
 149
 150                         if [[ -z $name ]]; then
 151                                 comps=${ARGS[DNSSEC]}
 152                         else
 153                                 comps=''
 154                         fi
 155
 156                 else
 157                         comps=''
 158                 fi
 159         fi
 160
 161         COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
 162         return 0
 163 }
 164
 165 complete -F _resolvectl resolvectl