systemd/shell-completion/zsh/_bootctl

#compdef bootctl

(( $+functions[_bootctl_command] )) || _bootctl_command()
{
    local -a _bootctl_cmds
    _bootctl_cmds=(
        "status:Show status of installed systemd-boot and EFI variables"
        "install:Install systemd-boot to the ESP and EFI variables"
        "update:Update systemd-boot in the ESP and EFI variables"
        "remove:Remove systemd-boot from the ESP and EFI variables"
    )
    if (( CURRENT == 1 )); then
        _describe -t commands 'bootctl command' _bootctl_cmds || compadd "$@"
    else
        local curcontext="$curcontext"
        cmd="${${_bootctl_cmds[(r)$words[1]:*]%%:*}}"
        if (( $+functions[_bootctl_$cmd] )); then
            _bootctl_$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.]' \
    '--path=[Path to the EFI System Partition (ESP)]:path:_directories' \
    '--no-variables[Do not touch EFI variables]' \
    '*::bootctl command:_bootctl_command'