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Editing: _systemctl

#compdef systemctl
# SPDX-License-Identifier: LGPL-2.1-or-later

(( $+functions[_systemctl_commands] )) || _systemctl_commands()
{
    local expl i

local -a unit_commands=(
        # Unit Commands
        "list-automounts:List automounts"
        "list-sockets:List sockets"
        "list-timers:List timers"
        "list-units:List units"
        "start:Start (activate) one or more units"
        "stop:Stop (deactivate) one or more units"
        "reload:Reload one or more units"
        "restart:Start or restart one or more units"
        "condrestart:Restart one or more units if active"
        "try-restart:Restart one or more units if active"
        "reload-or-restart:Reload one or more units if possible, otherwise start or restart"
        "force-reload:Reload one or more units if possible, otherwise restart if active"
        "try-reload-or-restart:Reload one or more units if possible, otherwise restart if active"
        "isolate:Start one unit and stop all others"
        "kill:Send signal to processes of a unit"
        "is-active:Check whether units are active"
        "is-failed:Check whether units are failed"
        "status:Show runtime status of one or more units"
        "show:Show properties of one or more units/jobs or the manager"
        "cat:Show the source unit files and drop-ins"
        "set-property:Sets one or more properties of a unit"
        "help:Show documentation for specified units"
        "reset-failed:Reset failed state for all, one, or more units"
        "list-dependencies:Show unit dependency tree"
        "clean:Remove configuration, state, cache, logs or runtime data of units"
        "bind:Bind mount a path from the host into a unit's namespace"
        "mount-image:Mount an image from the host into a unit's namespace"
    )

local -a machine_commands=(
        # Machine Commands
        "list-machines:List the host and all running local containers"
    )

local -a unit_file_commands=(
        # Unit File Commands
        "list-unit-files:List installed unit files"
        "enable:Enable one or more unit files"
        "disable:Disable one or more unit files"
        "reenable:Reenable one or more unit files"
        "preset:Enable/disable one or more unit files based on preset configuration"
        "preset-all:Enable/disable all unit files based on preset configuration"
        "is-enabled:Check whether unit files are enabled"
        "mask:Mask one or more units"
        "unmask:Unmask one or more units"
        "link:Link one or more units files into the search path"
        "revert:Revert unit files to their vendor versions"
        "add-wants:Add Wants= dependencies to a unit"
        "add-requires:Add Requires= dependencies to a unit"
        "set-default:Set the default target"
        "get-default:Query the default target"
        "edit:Edit one or more unit files"
    )

local -a job_commands=(
        # Job Commands
        "list-jobs:List jobs"
        "cancel:Cancel all, one, or more jobs"
    )

local -a environment_commands=(
        # Environment Commands
        "show-environment:Dump environment"
        "set-environment:Set one or more environment variables"
        "unset-environment:Unset one or more environment variables"
        "import-environment:Import environment variables set on the client"
    )

local -a manager_state_commands=(
        # Manager State Commands
        "daemon-reload:Reload systemd manager configuration"
        "daemon-reexec:Reexecute systemd manager"
        "log-level:Get or set the log level"
        "log-target:Get or set the log target"
        "service-watchdogs:Get or set the state of software watchdogs"
    )

local -a system_commands=(
        # System Commands
        "is-system-running:Query overall status of the system"
        "default:Enter system default mode"
        "rescue:Enter system rescue mode"
        "emergency:Enter system emergency mode"
        "halt:Shut down and halt the system"
        "suspend:Suspend the system"
        "poweroff:Shut down and power-off the system"
        "reboot:Shut down and reboot the system"
        "kexec:Shut down and reboot the system with kexec"
        "exit:Ask for user instance termination"
        "switch-root:Change root directory"
        "hibernate:Hibernate the system"
        "hybrid-sleep:Hibernate and suspend the system"
        "suspend-then-hibernate:Suspend the system for a period of time, and then hibernate it"
    )

local -a groups=( unit machine unit_file job environment manager_state system )
    local -a _systemctl_cmds
    for i in $groups; do
        _systemctl_cmds+=( "${(@P)${:-"${i}_commands"}}" )
    done

if (( CURRENT == 1 )); then
        _tags ${^groups//_/-}-commands
        while _tags; do
            for i in $groups; do
                if _requested ${i//_/-}-commands; then
                    _describe -t ${i//_/-}-commands "${i//_/ } command" ${i}_commands \
                        && ret=0
                fi
            done
        done
    else
        local curcontext="$curcontext"

cmd="${${_systemctl_cmds[(r)$words[1]:*]%%:*}}"
        # Deal with any aliases
        case $cmd in
            condrestart) cmd="try-restart";;
            force-reload) cmd="try-reload-or-restart";;
        esac

if (( $#cmd )); then
            curcontext="${curcontext%:*:*}:systemctl-${cmd}:"

local update_policy
            zstyle -s ":completion:${curcontext}:" cache-policy update_policy
            if [[ -z "$update_policy" ]]; then
                zstyle ":completion:${curcontext}:" cache-policy _systemctl_caching_policy
            fi

_call_function ret _systemctl_$cmd || _message 'no more arguments'
        else
            _message "unknown systemctl command: $words[1]"
        fi
        return ret
    fi
}

# @todo _systemd-run has a helper with the same name, so we must redefine
__systemctl()
{
    systemctl $_sys_service_mgr --full --legend=no --no-pager --plain "$@" 2>/dev/null
}

# Fills the unit list
(( $+functions[_systemctl_all_units] )) ||
    _systemctl_all_units()
{
    if ( [[ ${+_sys_all_units} -eq 0 ]] || _cache_invalid SYS_ALL_UNITS$_sys_service_mgr ) ||
           ! _retrieve_cache SYS_ALL_UNITS$_sys_service_mgr;
    then
        _sys_all_units=( ${${(f)"$(__systemctl list-units --all "$PREFIX*" )"}%% *} )
        _store_cache SYS_ALL_UNITS$_sys_service_mgr _sys_all_units
    fi
}

# Fills the unit list including all file units
(( $+functions[_systemctl_really_all_units] )) ||
    _systemctl_really_all_units()
{
    local -a all_unit_files;
    local -a really_all_units;
    if ( [[ ${+_sys_really_all_units} -eq 0 ]] || _cache_invalid SYS_REALLY_ALL_UNITS$_sys_service_mgr ) ||
           ! _retrieve_cache SYS_REALLY_ALL_UNITS$_sys_service_mgr;
    then
        all_unit_files=( ${${(f)"$(__systemctl list-unit-files "$PREFIX*" )"}%% *} )
        _systemctl_all_units
        really_all_units=($_sys_all_units $all_unit_files)
        _sys_really_all_units=(${(u)really_all_units})
        _store_cache SYS_REALLY_ALL_UNITS$_sys_service_mgr _sys_really_all_units
    fi
}

(( $+functions[_filter_units_by_property] )) ||
    _filter_units_by_property() {
        local property=$1 value=$2; shift 2
        local -a units; units=("${(q-)@}")
        local -A props
        props=(${(f)"$(_call_program units "$service $_sys_service_mgr show --no-pager --property=\"Id,$property\" -- ${units} 2>/dev/null")"})
        echo -E - "${(@g:o:)${(k@)props[(Re)$property=$value]}#Id=}"
    }

(( $+functions[_systemctl_get_non_template_names] )) ||
    _systemctl_get_non_template_names() { echo -E - ${^${(R)${(f)"$(
    __systemctl list-unit-files "$PREFIX*"
    __systemctl list-units --all "$PREFIX*"
  )"}:#*@.*}%%[[:space:]]*} }

(( $+functions[_systemctl_get_template_names] )) ||
    _systemctl_get_template_names() { echo -E - ${^${(M)${(f)"$(__systemctl list-unit-files "$PREFIX*" )"}##*@.[^[:space:]]##}%%@.*}\@ }

(( $+functions[_systemctl_active_units] )) ||
    _systemctl_active_units()  {_sys_active_units=(  ${${(f)"$(__systemctl list-units "$PREFIX*" )"}%% *} )}

(( $+functions[_systemctl_startable_units] )) ||
    _systemctl_startable_units(){
        _sys_startable_units=( $( _filter_units_by_property ActiveState inactive $(
                                      _filter_units_by_property CanStart yes ${${${(f)"$(
      __systemctl list-unit-files --state enabled,enabled-runtime,linked,linked-runtime,static,indirect,disabled,generated,transient "$PREFIX*"
      __systemctl list-units --state inactive,failed "$PREFIX*"
    )"}:#*@.*}%%[[:space:]]*}
                                                            )) )
    }

(( $+functions[_systemctl_restartable_units] )) ||
    _systemctl_restartable_units(){
        _sys_restartable_units=( $( _filter_units_by_property CanStart yes ${${${(f)"$(
    __systemctl list-unit-files --state enabled,disabled,static "$PREFIX*"
    __systemctl list-units "$PREFIX*"
  )"}:#*@.*}%%[[:space:]]*} ) )
    }

(( $+functions[_systemctl_failed_units] )) ||
    _systemctl_failed_units()  {_sys_failed_units=( ${${(f)"$(__systemctl list-units --state=failed "$PREFIX*" )"}%% *} ) }

(( $+functions[_systemctl_unit_state] )) ||
    _systemctl_unit_state() {
        setopt localoptions extendedglob
        typeset -gA _sys_unit_state
        _sys_unit_state=( ${=${${(f)"$(__systemctl list-unit-files "$PREFIX*" )"}%%[[:space:]]#}% *} )
    }

local fun
# Completion functions for ALL_UNITS
for fun in cat mask ; do
    (( $+functions[_systemctl_$fun] )) || _systemctl_$fun()
    {
        _systemctl_really_all_units
        _wanted systemd-units expl unit \
                compadd "$@" -a - _sys_really_all_units
    }
done

# Completion functions for NONTEMPLATE_UNITS
for fun in is-active is-failed is-enabled status show preset help list-dependencies edit revert add-wants add-requires set-property; do
    (( $+functions[_systemctl_$fun] )) || _systemctl_$fun()
    {
        _wanted systemd-units expl unit \
                compadd "$@" - $(_systemctl_get_non_template_names)
    }
done

# Completion functions for ENABLED_UNITS
(( $+functions[_systemctl_disable] )) || _systemctl_disable()
{
    local _sys_unit_state; _systemctl_unit_state
    _wanted systemd-units expl 'enabled unit' \
            compadd "$@" - ${(k)_sys_unit_state[(R)enabled]}
}

(( $+functions[_systemctl_reenable] )) || _systemctl_reenable()
{
    local _sys_unit_state; _systemctl_unit_state
    _wanted systemd-units expl 'enabled/disabled unit' \
            compadd "$@" - ${(k)_sys_unit_state[(R)(enabled|disabled)]} $(_systemctl_get_template_names)
}

# Completion functions for DISABLED_UNITS
(( $+functions[_systemctl_enable] )) || _systemctl_enable()
{
    local _sys_unit_state; _systemctl_unit_state
    _wanted systemd-units expl 'disabled unit' \
            compadd "$@" - ${(k)_sys_unit_state[(R)disabled]} $(_systemctl_get_template_names)
}

# Completion functions for FAILED_UNITS
(( $+functions[_systemctl_reset-failed] )) || _systemctl_reset-failed()
{
    local _sys_failed_units; _systemctl_failed_units
    _wanted systemd-units expl 'failed unit' \
            compadd "$@" -a - _sys_failed_units || _message "no failed unit found"
}

# Completion functions for STARTABLE_UNITS
(( $+functions[_systemctl_start] )) || _systemctl_start()
{
    local _sys_startable_units; _systemctl_startable_units
    _wanted systemd-units expl 'startable unit' \
            compadd "$@" - ${_sys_startable_units[*]}
}

# Completion functions for STOPPABLE_UNITS
for fun in stop kill try-restart condrestart ; do
    (( $+functions[_systemctl_$fun] )) || _systemctl_$fun()
    {
        local _sys_active_units; _systemctl_active_units
        _wanted systemd-units expl 'stoppable unit' \
                compadd "$@" - $( _filter_units_by_property CanStop yes \
                                                            ${_sys_active_units[*]} )
    }
done

# Completion functions for ISOLATABLE_UNITS
(( $+functions[_systemctl_isolate] )) || _systemctl_isolate()
{
    _systemctl_all_units
    _wanted systemd-units expl 'isolatable unit' \
            compadd "$@" - $( _filter_units_by_property AllowIsolate yes \
                                                        ${_sys_all_units[*]} )
}

# Completion functions for RELOADABLE_UNITS
for fun in reload try-reload-or-restart force-reload ; do
    (( $+functions[_systemctl_$fun] )) || _systemctl_$fun()
    {
        local _sys_active_units; _systemctl_active_units
        _wanted systemd-units expl 'reloadable unit' \
                compadd "$@" - $( _filter_units_by_property CanReload yes \
                                                            ${_sys_active_units[*]} )
    }
done

# Completion functions for RESTARTABLE_UNITS
for fun in restart reload-or-restart ; do
    (( $+functions[_systemctl_$fun] )) || _systemctl_$fun()
    {
        local _sys_restartable_units; _systemctl_restartable_units
        _wanted systemd-units expl 'restartable unit' \
                compadd "$@" - ${_sys_restartable_units[*]}
    }
done

# Completion functions for MASKED_UNITS
(( $+functions[_systemctl_unmask] )) || _systemctl_unmask()
{
    local _sys_unit_state; _systemctl_unit_state
    _wanted systemd-units expl 'masked unit' \
            compadd "$@" - ${(k)_sys_unit_state[(R)masked]} || _message "no masked units found"
}

# Completion functions for JOBS
(( $+functions[_systemctl_cancel] )) || _systemctl_cancel()
{
    _wanted systemd-jobs expl job \
            compadd "$@" - ${${(f)"$(__systemctl list-jobs)"}%% *} ||
        _message "no jobs found"
}

# Completion functions for TARGETS
(( $+functions[_systemctl_set-default] )) || _systemctl_set-default()
{
    _wanted systemd-targets expl target \
            compadd "$@" - ${${(f)"$(__systemctl list-unit-files --type target --all "$PREFIX*" )"}%% *} ||
        _message "no targets found"
}

# Completion functions for ENVS
for fun in set-environment unset-environment ; do
    (( $+functions[_systemctl_$fun] )) || _systemctl_$fun()
    {
        local fun=$0 ; fun=${fun##_systemctl_}
        local suf
        if [[ "${fun}" = "set-environment" ]]; then
            suf='-S='
        fi
        _wanted systemd-environment expl 'environment variable' \
                compadd "$@" ${suf} - ${${(f)"$(systemctl show-environment)"}%%=*}
    }
done

(( $+functions[_systemctl_import-environment] )) || _systemctl_import-environment()
{
    _parameters
}

(( $+functions[_systemctl_link] )) || _systemctl_link() {
        _sd_unit_files
    }

(( $+functions[_systemctl_switch-root] )) || _systemctl_switch-root() {
        _files
    }

(( $+functions[_systemctl_bind] )) || _systemctl_bind() {
        _files
    }

(( $+functions[_systemctl_mount-image] )) || _systemctl_mount-image() {
        _files
    }

# no systemctl completion for:
#    [STANDALONE]='daemon-reexec daemon-reload default
#                  emergency exit halt kexec list-jobs list-units
#                  list-unit-files poweroff reboot rescue show-environment'

(( $+functions[_systemctl_caching_policy] )) ||
    _systemctl_caching_policy()
{
    local _sysunits
    local -a oldcache

# rebuild if cache is more than a day old
    oldcache=( "$1"(mh+1) )
    (( $#oldcache )) && return 0

_sysunits=(${${(f)"$(__systemctl --all)"}%% *})

if (( $#_sysunits )); then
        for unit in $_sysunits; do
            [[ "$unit" -nt "$1" ]] && return 0
        done
    fi

return 1
}

(( $+functions[_systemctl_unit_states] )) ||
    _systemctl_unit_states() {
        local -a _states
        _states=("${(fo)$(__systemctl --state=help)}")
        _values -s , "${_states[@]}"
    }

(( $+functions[_systemctl_unit_types] )) ||
    _systemctl_unit_types() {
        local -a _types
        _types=("${(fo)$(__systemctl -t help)}")
        _values -s , "${_types[@]}"
    }

(( $+functions[_systemctl_unit_properties] )) ||
    _systemctl_unit_properties() {
        if ( [[ ${+_sys_all_properties} -eq 0 ]] || _cache_invalid SYS_ALL_PROPERTIES$_sys_service_mgr ) ||
               ! _retrieve_cache SYS_ALL_PROPERTIES$_sys_service_mgr;
        then
            _sys_all_properties=( ${${(M)${(f)"$(/usr/lib/systemd/systemd --dump-bus-properties)"}}} )
            _store_cache SYS_ALL_PROPERTIES$_sys_service_mgr _sys_all_properties
        fi
        _values -s , "${_sys_all_properties[@]}"
    }

(( $+functions[_systemctl_job_modes] )) ||
    _systemctl_job_modes() {
        local -a _modes
        _modes=(fail replace replace-irreversibly isolate ignore-dependencies ignore-requirements flush)
        _values -s , "${_modes[@]}"
    }

(( $+functions[_systemctl_timestamp] )) ||
    _systemctl_timestamp() {
        local -a _styles
        _styles=(help pretty us µs utc us+utc µs+utc)
        _values -s , "${_styles[@]}"
    }

(( $+functions[_systemctl_check_inhibitors] )) ||
    _systemctl_check_inhibitors() {
        local -a _modes
        _modes=(auto yes no)
        _values -s , "${_modes[@]}"
    }

# Build arguments for "systemctl" to be used in completion.
local -a _modes; _modes=("--user" "--system")
# Use the last mode (they are exclusive and the last one is used).
local _sys_service_mgr=${${words:*_modes}[(R)(${(j.|.)_modes})]}
_arguments -s \
    {-h,--help}'[Show help]' \
    '--version[Show package version]' \
    {-t+,--type=}'[List only units of a particular type]:unit type:_systemctl_unit_types' \
    '--state=[Display units in the specified state]:unit state:_systemctl_unit_states' \
    '--job-mode=[Specify how to deal with other jobs]:mode:_systemctl_job_modes' \
    {-p+,--property=}'[Show only properties by specific name]:unit property:_systemctl_unit_properties' \
    {-a,--all}'[Show all units/properties, including dead/empty ones]' \
    '--reverse[Show reverse dependencies]' \
    '--after[Show units ordered after]' \
    '--before[Show units ordered before]' \
    {-l,--full}"[Don't ellipsize unit names on output]" \
    '--show-types[When showing sockets, show socket type]' \
    '--check-inhibitors[Specify if inhibitors should be checked]:mode:_systemctl_check_inhibitors' \
    {-q,--quiet}'[Suppress output]' \
    '--no-warn[Suppress several warnings shown by default]' \
    '--no-block[Do not wait until operation finished]' \
    '--legend=no[Do not print a legend, i.e. the column headers and the footer with hints]' \
    '--no-pager[Do not pipe output into a pager]' \
    '--system[Connect to system manager]' \
    '--user[Connect to user service manager]' \
    "--no-wall[Don't send wall message before halt/power-off/reboot]" \
    '--global[Enable/disable/mask default user unit files globally]' \
    "--no-reload[When enabling/disabling unit files, don't reload daemon configuration]" \
    '--no-ask-password[Do not ask for system passwords]' \
    '--kill-whom=[Whom to send signal to]:killwhom:(main control all)' \
    {-s+,--signal=}'[Which signal to send]:signal:_signals' \
    {-f,--force}'[When enabling unit files, override existing symlinks. When shutting down, execute action immediately]' \
    '--root=[Enable/disable/mask unit files in the specified root directory]:directory:_directories' \
    '--runtime[Enable/disable/mask unit files only temporarily until next reboot]' \
    {-H+,--host=}'[Operate on remote host]:userathost:_sd_hosts_or_user_at_host' \
    {-P,--privileged}'[Acquire privileges before execution]' \
    {-n+,--lines=}'[Journal entries to show]:number of entries' \
    {-o+,--output=}'[Change journal output mode]:modes:_sd_outputmodes' \
    '--firmware-setup[Tell the firmware to show the setup menu on next boot]' \
    '--plain[When used with list-dependencies, print output as a list]' \
    '--failed[Show failed units]' \
    '--timestamp=[Change format of printed timestamps]:style:_systemctl_timestamp' \
    '*::systemctl command:_systemctl_commands'

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Editing: _systemctl