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# portablectl(1) completion                             -*- shell-script -*-
# SPDX-License-Identifier: LGPL-2.1+
#
# 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 <http://www.gnu.org/licenses/>.

__contains_word () {
        local w word=$1; shift
        for w in "$@"; do
                [[ $w = "$word" ]] && return
        done
}

__get_machines() {
        local a b
        machinectl list --no-legend --no-pager 2>/dev/null |
                { while read a b; do echo " $a"; done; };
}

_portablectl() {
        local i n comps verb
        local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
        local -A OPTS=(
                [STANDALONE]='-q --quiet --runtime --no-reload --cat --no-pager --no-legend
                              --no-ask-password -h --help --version'
                [ARG]='-p --profile --copy -H --host -M --machine'
        )

        local -A VERBS=(
                [STANDALONE]='list'
                [IMAGE]='attach detach inspect is-attached set-limit'
                [IMAGES]='remove'
                [IMAGE_WITH_BOOL]='read-only'
        )

        if __contains_word "$prev" ${OPTS[ARG]}; then
                case $prev in
                        --profile|-p)
                                comps="default nonetwork strict trusted"
                                ;;
                        --copy)
                                comps="copy symlink auto"
                                ;;
                        --host|-H)
                                comps=$(compgen -A hostname)
                                ;;
                        --machine|-M)
                                comps=$( __get_machines )
                                ;;
                esac
                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                return 0
        fi

        if [[ "$cur" = -* ]]; then
                COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
                return 0
        fi

        for ((i=0; i < COMP_CWORD; i++)); do
                if __contains_word "${COMP_WORDS[i]}" ${VERBS[*]} &&
                 ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
                        verb=${COMP_WORDS[i]}
                        break
                fi
        done

        n=$(($COMP_CWORD - $i))

        if [[ -z $verb ]]; then
                comps=${VERBS[*]}
        elif __contains_word "$verb" ${VERBS[STANDALONE]}; then
                comps=''
        elif __contains_word "$verb" ${VERBS[IMAGE]}; then
                if [[ $n == 1 ]]; then
                        comps=$( compgen -A file -- "$cur" )
                        compopt -o filenames
                else
                        comps=''
                fi
        elif __contains_word "$verb" ${VERBS[IMAGES]}; then
                comps=$( compgen -A file -- "$cur" )
                compopt -o filenames
        elif __contains_word "$verb" ${VERBS[IMAGE_WITH_BOOL]}; then
                if [[ $n == 1 ]]; then
                        comps=$( compgen -A file -- "$cur" )
                        compopt -o filenames
                elif [[ $n == 2 ]]; then
                        comps='yes no'
                else
                        comps=''
                fi
        fi

        COMPREPLY=( $(compgen -o filenames -W '$comps' -- "$cur") )
        return 0
}

complete -F _portablectl portablectl