shell-completion/zsh/_loginctl

#compdef loginctl

_loginctl_all_sessions(){_sys_all_sessions=($(loginctl list-sessions | { while read a b; do echo " $a"; done; }) )}
_loginctl_all_users()   {_sys_all_users=(   $(loginctl list-users    | { while read a b; do echo " $a"; done; }) )}
_loginctl_all_seats()   {_sys_all_seats=(   $(loginctl list-seats    | { while read a b; do echo " $a"; done; }) )}

# Completion functions for SESSIONS
for fun in session-status show-session activate lock-session unlock-session terminate-session kill-session ; do
  (( $+functions[_loginctl_$fun] )) || _loginctl_$fun()
  {
    _loginctl_all_sessions
    compadd "$@" -a - _sys_all_sessions
  }
done

# Completion functions for USERS
for fun in user-status show-user enable-linger disable-linger terminate-user kill-user ; do
  (( $+functions[_loginctl_$fun] )) || _loginctl_$fun()
  {
    _loginctl_all_users
    compadd "$@" -a - _sys_all_users
  }
done

# Completion functions for SEATS
(( $+functions[_loginctl_seats] )) || _loginctl_seats()
{
  _loginctl_all_seats
  compadd "$@" -a - _sys_all_seats
}
for fun in seat-status show-seat terminate-seat ; do
  (( $+functions[_loginctl_$fun] )) || _loginctl_$fun()
  { _loginctl_seats }
done

# Completion functions for ATTACH
(( $+functions[_loginctl_attach] )) || _loginctl_attach()
{
  _loginctl_all_seats

  _arguments -w -C -S -s \
    ':seat:_loginctl_seats' \
    '*:device:_files'
}

# no loginctl completion for:
# [STANDALONE]='list-sessions list-users list-seats flush-devices'

(( $+functions[_loginctl_command] )) || _loginctl_command()
{
  local -a _loginctl_cmds
  _loginctl_cmds=(
    "list-sessions:List sessions"
    "session-status:Show session status"
    "show-session:Show properties of one or more sessions"
    "activate:Activate a session"
    "lock-session:Screen lock one or more sessions"
    "unlock-session:Screen unlock one or more sessions"
    "terminate-session:Terminate one or more sessions"
    "kill-session:Send signal to processes of a session"
    "list-users:List users"
    "user-status:Show user status"
    "show-user:Show properties of one or more users"
    "enable-linger:Enable linger state of one or more users"
    "disable-linger:Disable linger state of one or more users"
    "terminate-user:Terminate all sessions of one or more users"
    "kill-user:Send signal to processes of a user"
    "list-seats:List seats"
    "seat-status:Show seat status"
    "show-seat:Show properties of one or more seats"
    "attach:Attach one or more devices to a seat"
    "flush-devices:Flush all device associations"
    "terminate-seat:Terminate all sessions on one or more seats"
  )

  if (( CURRENT == 1 )); then
    _describe -t commands 'loginctl command' _loginctl_cmds || compadd "$@"
  else
    local curcontext="$curcontext"

    cmd="${${_loginctl_cmds[(r)$words[1]:*]%%:*}}"

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

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


_arguments -s \
    {-h,--help}'[Show help]' \
    '--version[Show package version]' \
    \*{-p+,--property=}'[Show only properties by this name]:unit property' \
    {-a,--all}'[Show all properties, including empty ones]' \
    '--kill-who=[Who to send signal to]:killwho:(main control all)' \
    {-s+,--signal=}'[Which signal to send]:signal:_signals' \
    '--no-ask-password[Do not ask for system passwords]' \
    {-H+,--host=}'[Show information for remote host]:userathost:_sd_hosts_or_user_at_host' \
    {-P,--privileged}'[Acquire privileges before execution]' \
    '--no-pager[Do not pipe output into a pager]' \
    '*::loginctl command:_loginctl_command'