shell-completion/bash/systemd-run

# systemd-run(1) completion                       -*- shell-script -*-
#
# This file is part of systemd.
#
# Copyright 2013 Zbigniew Jędrzejewski-Szmek
#
# 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; }; }

_systemd_run() {
    local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
    local OPTS='-h --help --version --user --scope --unit --description --slice -r --remain-after-exit --send-sighup'

    local mode=--system
    local i
    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 && ${COMP_WORDS[i]} == @(--unit|--description|--slice) ]] && ((i++))
    done

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

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

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

complete -F _systemd_run systemd-run