bash-completion: systemctl: use --output=help to show suggestions

[thirdparty/systemd.git] / shell-completion / bash / systemd-run

# systemd-run(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/>.

__systemctl() {
        local mode=$1; shift 1
        systemctl $mode --full --no-legend "$@"
}

__get_slice_units () { __systemctl $1 list-units --all -t slice \
        | { while read -r a b c d; do echo " $a"; done; }; }

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

_systemd_run() {
    local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
    local OPTS='-h --help --version --user --system --scope --unit --description --slice
                -r --remain-after-exit --send-sighup -H --host -M --machine --service-type
                --on-active --on-boot --on-startup --on-unit-active --on-unit-inactive
                --on-calendar --timer-property --path-property --socket-property -t --pty
                -q --quiet --no-block --uid --gid --nice -E --setenv -p --property
                --no-ask-password --wait -P --pipe -G --collect'

    local mode=--system
    local i
    local opts_with_values=(
        --unit --description --slice --service-type -H --host -M --machine -p --property --on-active
        --on-boot --on-startup --on-unit-active --on-unit-inactive --on-calendar --timer-property
        --path-property --socket-property --uid --gid --nice -E --setenv
    )
    for (( i=1; i <= COMP_CWORD; i++ )); do
        if [[ ${COMP_WORDS[i]} != -* ]]; then
            local root_command=${COMP_WORDS[i]}
            _command_offset $i
            return
        fi

        [[ ${COMP_WORDS[i]} == "--user" ]] && mode=--user

        [[ $i -lt $COMP_CWORD && " ${opts_with_values[@]} " =~ " ${COMP_WORDS[i]} " ]] && ((i++))
    done

    case "$prev" in
        --unit|--description|--on-active|--on-boot|--on-startup|--on-unit-active|--on-unit-inactive|--on-calendar)
            # argument required but no completions available
            return
            ;;
        --slice)
            local comps=$(__get_slice_units $mode)

            COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
            return 0
            ;;
        --service-type)
            local comps='simple forking oneshot dbus notify idle'

            COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
            return 0
            ;;
        -p|--property)
            local comps='CPUAccounting= MemoryAccounting= BlockIOAccounting= SendSIGHUP=
                         SendSIGKILL= MemoryLimit= CPUShares= BlockIOWeight= User= Group=
                         DevicePolicy= KillMode= DeviceAllow= BlockIOReadBandwidth=
                         BlockIOWriteBandwidth= BlockIODeviceWeight= Nice= Environment=
                         KillSignal= FinalKillSignal= LimitCPU= LimitFSIZE= LimitDATA=
                         LimitSTACK= LimitCORE= LimitRSS= LimitNOFILE= LimitAS= LimitNPROC=
                         LimitMEMLOCK= LimitLOCKS= LimitSIGPENDING= LimitMSGQUEUE=
                         LimitNICE= LimitRTPRIO= LimitRTTIME= PrivateTmp= PrivateDevices=
                         PrivateNetwork= NoNewPrivileges= WorkingDirectory= RootDirectory=
                         TTYPath= SyslogIdentifier= SyslogLevelPrefix= SyslogLevel=
                         SyslogFacility= TimerSlackNSec= OOMScoreAdjust= ReadWritePaths=
                         ReadOnlyPaths= InaccessiblePaths= EnvironmentFile=
                         ProtectSystem= ProtectHome= RuntimeDirectory= PassEnvironment='

            COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
            return 0
            ;;
        -H|--host)
            local comps=$(compgen -A hostname)

            COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
            return 0
            ;;
        -M|--machine)
            local comps=$( __get_machines )

            COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
            return 0
            ;;
        --timer-property)
            local comps='AccuracySec= WakeSystem='
            COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
            return 0
            ;;
    esac

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

complete -F _systemd_run systemd-run