shell-completion/bash/bootctl

   1 # bootctl(1) completion                               -*- shell-script -*-
   2 # SPDX-License-Identifier: LGPL-2.1+
   3 #
   4 # This file is part of systemd.
   5 #
   6 #
   7 # systemd is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU Lesser General Public License as published by
   9 # the Free Software Foundation; either version 2.1 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # systemd is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15 # General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU Lesser General Public License
  18 # along with systemd; If not, see <http://www.gnu.org/licenses/>.
  19
  20 __contains_word () {
  21         local w word=$1; shift
  22         for w in "$@"; do
  23                 [[ $w = "$word" ]] && return
  24         done
  25 }
  26
  27 __get_entry_ids() {
  28         bootctl --no-pager list 2>/dev/null | { while read -r a b; do [[ $a == 'id:' ]] && echo " $b"; done }
  29 }
  30
  31 _bootctl() {
  32         local i verb comps
  33         local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
  34         local -A OPTS=(
  35                 [STANDALONE]='-h --help --no-variables -p --print-path --version --no-pager'
  36                        [ARG]='--path'
  37         )
  38
  39         if __contains_word "$prev" ${OPTS[ARG]}; then
  40                 case $prev in
  41                         --path)
  42                                 if [[ -z $cur ]]; then
  43                                         comps=$(compgen -A directory -- "/" )
  44                                 else
  45                                         comps=$(compgen -A directory -- "$cur" )
  46                                 fi
  47                                 compopt -o filenames
  48                                 ;;
  49                 esac
  50                 COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
  51                 return 0
  52         fi
  53
  54         if [[ "$cur" = -* ]]; then
  55                 COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
  56                 return 0
  57         fi
  58
  59         local -A VERBS=(
  60                 [STANDALONE]='help install list remove status update'
  61                 [BOOTENTRY]='set-default set-oneshot'
  62         )
  63
  64         for ((i=0; i < COMP_CWORD; i++)); do
  65                 if __contains_word "${COMP_WORDS[i]}" ${VERBS[*]}; then
  66                         verb=${COMP_WORDS[i]}
  67                         break
  68                 fi
  69         done
  70
  71         if [[ -z $verb ]]; then
  72                 comps=${VERBS[*]}
  73         elif __contains_word "$verb" ${VERBS[STANDALONE]}; then
  74                 comps=''
  75         elif __contains_word "$verb" ${VERBS[BOOTENTRY]}; then
  76                 name=
  77                 for ((i++; i < COMP_CWORD; i++)); do
  78                         if ! __contains_word "${COMP_WORDS[i]}" ${OPTS[*]} ${VERBS[*]} &&
  79                            ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
  80                                 name=${COMP_WORDS[i]}
  81                                 break;
  82                         fi
  83                 done
  84
  85                 if [[ -z $name ]]; then
  86                         comps=$( __get_entry_ids )
  87                 else
  88                         comps=''
  89                 fi
  90         fi
  91
  92         COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
  93         return 0
  94 }
  95
  96 complete -F _bootctl bootctl