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# udevadm(8) completion                                   -*- shell-script -*-
# SPDX-License-Identifier: LGPL-2.1+
#
# This file is part of systemd.
#
# Copyright © 2010 Ran Benita
#
# 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_all_sysdevs() {
        local -a devs=(/sys/bus/*/devices/*/ /sys/class/*/*/)
        printf '%s\n' "${devs[@]%/}"
}

__get_all_devs() {
        local i
        for i in /dev/* /dev/*/*; do
                echo $i
        done
}

__get_all_device_units() {
        systemctl list-units -t device --full --no-legend --no-pager 2>/dev/null | \
                { while read -r a b; do echo "$a"; done; }
}

_udevadm() {
        local i verb comps builtin
        local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
        local -A OPTS=(
                [COMMON]='-h --help -V --version'
                [DEBUG]='-d --debug'
                [INFO_STANDALONE]='-r --root -a --attribute-walk -x --export -e --export-db -c --cleanup-db'
                [INFO_ARG]='-q --query -p --path -n --name -P --export-prefix -d --device-id-of-file'
                [TRIGGER_STANDALONE]='-v --verbose -n --dry-run -w --settle --wait-daemon'
                [TRIGGER_ARG]='-t --type -c --action -s --subsystem-match -S --subsystem-nomatch
                               -a --attr-match -A --attr-nomatch -p --property-match
                               -g --tag-match -y --sysname-match --name-match -b --parent-match'
                [SETTLE]='-t --timeout -E --exit-if-exists'
                [CONTROL_STANDALONE]='-e --exit -s --stop-exec-queue -S --start-exec-queue -R --reload --ping'
                [CONTROL_ARG]='-l --log-priority -p --property -m --children-max -t --timeout'
                [MONITOR_STANDALONE]='-k --kernel -u --udev -p --property'
                [MONITOR_ARG]='-s --subsystem-match -t --tag-match'
                [TEST]='-a --action -N --resolve-names'
        )

        local verbs=(info trigger settle control monitor test-builtin test)
        local builtins=(blkid btrfs hwdb input_id keyboard kmod net_id net_setup_link path_id usb_id uaccess)

        for ((i=0; i < COMP_CWORD; i++)); do
                if __contains_word "${COMP_WORDS[i]}" "${verbs[@]}"; then
                        verb=${COMP_WORDS[i]}
                        break
                fi
        done

        if [[ -z $verb ]]; then
                if [[ "$cur" = -* ]]; then
                        COMPREPLY=( $(compgen -W '${OPTS[COMMON]} ${OPTS[DEBUG]}' -- "$cur") )
                else
                        COMPREPLY=( $(compgen -W '${verbs[*]}' -- "$cur") )
                fi
                return 0
        fi

        case $verb in
                'info')
                        if __contains_word "$prev" ${OPTS[INFO_ARG]}; then
                                case $prev in
                                        -q|--query)
                                                comps='name symlink path property all'
                                                ;;
                                        -p|--path)
                                                comps=$( __get_all_sysdevs )
                                                local IFS=$'\n'
                                                ;;
                                        -n|--name)
                                                comps=$( __get_all_devs )
                                                ;;
                                        *)
                                                comps=''
                                                ;;
                                esac
                                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                                return 0
                        fi

                        if [[ $cur = -* ]]; then
                                comps="${OPTS[COMMON]} ${OPTS[INFO_STANDALONE]} ${OPTS[INFO_ARG]}"
                        else
                                comps=$( __get_all_sysdevs; __get_all_device_units )
                                local IFS=$'\n'
                        fi
                        ;;
                'trigger')
                        if __contains_word "$prev" ${OPTS[TRIGGER_ARG]}; then
                                case $prev in
                                        -t|--type)
                                                comps='devices subsystems'
                                                ;;
                                        -c|--action)
                                                comps='add change remove bind unbind'
                                                ;;
                                        -y|--sysname-match|-b|--parent-match)
                                                comps=$( __get_all_sysdevs )
                                                local IFS=$'\n'
                                                ;;
                                        --name-match)
                                                comps=$( __get_all_devs )
                                                ;;
                                        *)
                                                comps=''
                                                ;;
                                esac
                                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                                return 0
                        fi

                        if [[ $cur = -* ]]; then
                                comps="${OPTS[COMMON]} ${OPTS[TRIGGER_STANDALONE]} ${OPTS[TRIGGER_ARG]}"
                        else
                                comps=$( __get_all_sysdevs; __get_all_device_units )
                                local IFS=$'\n'
                        fi
                        ;;
                'settle')
                        if __contains_word "$prev" ${OPTS[SETTLE]}; then
                                case $prev in
                                        -E|--exit-if-exists)
                                                comps=$( compgen -A file -- "$cur" )
                                                ;;
                                        *)
                                                comps=''
                                                ;;
                                esac
                                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                                return 0
                        fi

                        comps="${OPTS[COMMON]} ${OPTS[SETTLE]}"
                        ;;
                'control')
                        if __contains_word "$prev" ${OPTS[CONTROL_ARG]}; then
                                case $prev in
                                        -l|--log-priority)
                                                comps='alert crit debug emerg err info notice warning'
                                                ;;
                                        *)
                                                comps=''
                                                ;;
                                esac
                                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                                return 0
                        fi

                        comps="${OPTS[COMMON]} ${OPTS[CONTROL_STANDALONE]} ${OPTS[CONTROL_ARG]}"
                        ;;
                'monitor')
                        if __contains_word "$prev" ${OPTS[MONITOR_ARG]}; then
                                case $prev in
                                        *)
                                                comps=''
                                                ;;
                                esac
                                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                                return 0
                        fi

                        comps="${OPTS[COMMON]} ${OPTS[MONITOR_STANDALONE]} ${OPTS[MONITOR_ARG]}"
                        ;;
                'test')
                        if __contains_word "$prev" ${OPTS[TEST]}; then
                                case $prev in
                                        -a|--action)
                                                comps='add change remove bind unbind'
                                                ;;
                                        -N|--resolve-names)
                                                comps='early late never'
                                                ;;
                                esac
                                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                                return 0
                        fi

                        if [[ $cur = -* ]]; then
                                comps="${OPTS[COMMON]} ${OPTS[TEST]}"
                        else
                                comps=$( __get_all_sysdevs )
                                local IFS=$'\n'
                        fi
                        ;;
                'test-builtin')
                        for ((i=0; i < COMP_CWORD; i++)); do
                                if __contains_word "${COMP_WORDS[i]}" "${builtins[@]}"; then
                                        builtin=${COMP_WORDS[i]}
                                        break
                                fi
                        done

                        if [[ -z $builtin ]]; then
                                comps="${builtins[@]}"
                        elif [[ $cur = -* ]]; then
                                comps="${OPTS[COMMON]}"
                        else
                                comps=$( __get_all_sysdevs )
                                local IFS=$'\n'
                        fi
                        ;;
                *)
                        comps=${VERBS[*]}
                        ;;
        esac

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

complete -F _udevadm udevadm