^^&&^^

Edit File: _busctl

#compdef busctl
# SPDX-License-Identifier: LGPL-2.1+

# busctl(1) completion                               -*- shell-script -*-
#
# 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/>.

(( $+functions[_busctl_command] )) || _busctl_command()
{
    local -a _busctl_cmds
    _busctl_cmds=(
        "list:List bus names"
        "status:Show bus service, process or bus owner credentials"
        "monitor:Show bus traffic"
        "capture:Capture bus traffix as pcap"
        "tree:Show object tree of service"
        "introspect:Introspect object"
        "call:Call a method"
        "get-property:Get property value"
        "set-property:Set property value"
    )
    if (( CURRENT == 1 )); then
        _describe -t commands 'busctl command' _busctl_cmds || compadd "$@"
    else
        local curcontext="$curcontext"
        cmd="${${_busctl_cmds[(r)$words[1]:*]%%:*}}"
        if (( $+functions[_busctl_$cmd] )); then
            _busctl_$cmd
        else
            _message "no more options"
        fi
    fi
}

_arguments \
    {-h,--help}'[Prints a short help text and exits.]' \
    '--version[Prints a short version string and exits.]' \
    '--no-pager[Do not pipe output into a pager]' \
    '--no-legend[Do not show the headers and footers]' \
    '--system[Connect to system manager]' \
    '--user[Connect to user service manager]' \
    {-H+,--host=}'[Operate on remote host]:userathost:_sd_hosts_or_user_at_host' \
    {-M+,--machine=}'[Operate on local container]:machines:_sd_machines' \
    '--address=[Connect to the bus specified by address]:address' \
    '--show-machine[Show machine ID column in list]' \
    '--unique[Only show unique names]' \
    '--acquired[Only show acquired names]' \
    '--activatable[Only show activatable names]' \
    '--match=[Only show matching messages]:match' \
    '--list[Do not show tree, but simple object path list]' \
    '--quiet[Do not show method call reply]'\
    '--verbose[Show result values in long format]' \
    '--expect-reply=[Expect a method call reply]:boolean:(1 0)' \
    '--auto-start=[Auto-start destination service]:boolean:(1 0)' \
    '--allow-interactive-authorization=[Allow interactive authorization for operation]:boolean:(1 0)' \
    '--timeout=[Maximum time to wait for method call completion]:timeout (seconds)' \
    '--augment-creds=[Extend credential data with data read from /proc/$PID]:boolean:(1 0)' \
    '*::busctl command:_busctl_command'