systemd/shell-completion/zsh/_machinectl

#compdef machinectl

(( $+functions[_machinectl_command] )) || _machinectl_command()
{
  local -a _machinectl_cmds
  _machinectl_cmds=(
    "list:List currently running VMs/containers"
    "status:Show VM/container status"
    "show:Show properties of one or more VMs/containers"
    "login:Get a login prompt on a VM/container"
    "poweroff:Power off one or more VMs/containers"
    "reboot:Reboot one or more VMs/containers"
    "terminate:Terminate one or more VMs/containers"
    "kill:Send signal to process or a VM/container"
  )
  if (( CURRENT == 1 )); then
    _describe -t commands 'machinectl command' _machinectl_cmds || compadd "$@"
  else
    local curcontext="$curcontext"
    cmd="${${_machinectl_cmds[(r)$words[1]:*]%%:*}}"
    if (( $#cmd )); then
      case $cmd in
        list) msg="no options" ;;
        *)
          _sd_machines
      esac
    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.]' \
  \*{-p+,--property=}'[Limit output to specified property.]:property:(Name Id Timestamp TimestampMonotonic Service Scope Leader Class State RootDirectory)' \
  {-a,--all}'[Show all proerties]' \
  (-l,--full)'[Do not ellipsize cgroup members]' \
  '--no-pager[Do not pipe output into a pager]' \
  '--no-ask-password[Do not ask for system passwords]' \
  '--kill-who=[Who to send signal to]:killwho:(leader all)' \
  {-s+,--signal=}'[Which signal to send]:signal:_signals' \
  {-H+,--host=}'[Operate on remote host]:userathost:_sd_hosts_or_user_at_host' \
  {-P,--privileged}'[Acquire privileges before execution]' \
  '*::machinectl command:_machinectl_command'