# This is the public domain getoptions shell library. It also forms a usage
# function.
# URL: https://github.com/ko1nksm/getoptions (v2.0.1)
# License: Creative Commons Zero v1.0 Universal
# shellcheck disable=2016
getoptions() {
    _error='' _on=1 _off='' _export='' _plus='' _mode='' _alt='' _rest=''
    _opts='' _help='' _indent='' _init=@empty IFS=' '

    for i in 0 1 2 3 4 5; do
        eval "_$i() { echo \"$_indent\$@\"; }"
        _indent="$_indent       "
    done

    quote() {
        q="$2'" r=''
        while [ "$q" ]; do r="$r${q%%\'*}'\''" && q=${q#*\'}; done
        q="'${r%????}'" && q=${q#\'\'} && q=${q%\'\'}
        eval "$1=\${q:-\"''\"}"
    }
    code() {
        [ "${1#:}" = "$1" ] && c=3 || c=4
        eval "[ ! \${$c:+x} ] || $2 \"\$$c\""
    }

    invoke() { eval '"_$@"'; }
    prehook() { invoke "$@"; }
    for i in setup flag param option disp msg; do
        eval "$i() { prehook $i \"\$@\"; }"
    done

    args() {
        on=$_on off=$_off export=$_export init=$_init _hasarg=$1
        while [ $# -gt 2 ] && [ "$3" != '--' ] && shift; do
            case $2 in
                -?) [ "$_hasarg" ] || _opts="$_opts${2#-}" ;;
                +*) _plus=1 ;;
                [!-+]*) eval "${2%%:*}=\${2#*:}"
            esac
        done
    }
    defvar() {
        case $init in
            @none) : ;;
            @export) code "$1" _0 "export $1" ;;
            @empty) code "$1" _0 "${export:+export }$1=''" ;;
            @unset) code "$1" _0 "unset $1 ||:" "unset OPTARG ||:; ${1#:}" ;;
            *)
                case $init in @*) eval "init=\"=\${${init#@}}\""; esac
                case $init in [!=]*) _0 "$init"; return 0; esac
                quote init "${init#=}"
                code "$1" _0 "${export:+export }$1=$init" "OPTARG=$init; ${1#:}"
        esac
    }
    _setup() {
        [ $# -gt 0 ] && { [ "$1" ] && _rest=$1; shift; }
        for i; do [ "$i" = '--' ] && break; eval "_${i%%:*}=\${i#*:}"; done
    }
    _flag() { args : "$@"; defvar "$@"; }
    _param() { args '' "$@"; defvar "$@"; }
    _option() { args '' "$@"; defvar "$@"; }
    _disp() { args : "$@"; }
    _msg() { args : _ "$@"; }

    "$@"
    _0 "${_rest:?}=''"

    args() {
        sw='' validate='' pattern='' counter='' on=$_on off=$_off export=$_export
        while [ $# -gt 1 ] && [ "$2" != '--' ] && shift; do
            case $1 in
                --\{no-\}*) sw="$sw${sw:+ | }--${1#--?no-?} | --no-${1#--?no-?}" ;;
                [-+]? | --*) sw="$sw${sw:+ | }$1" ;;
                *) eval "${1%%:*}=\"\${1#*:}\""
            esac
        done
    }
    setup() { :; }
    _flag() {
        args "$@"
        quote on "$on" && quote off "$off"
        [ "$counter" ] && on=1 off=-1 v="\$((\${$1:-0}+\${OPTARG:-0}))" || v=''
        _3 "$sw)"
        _4 '[ "${OPTARG:-}" ] && OPTARG=${OPTARG#*\=} && set -- noarg "$1" && break'
        _4 "eval '[ \${OPTARG+x} ] &&:' && OPTARG=$on || OPTARG=$off"
        valid "$1" "${v:-\$OPTARG}"
        _4 ';;'
    }
    _param() {
        args "$@"
        _3 "$sw)"
        _4 '[ $# -le 1 ] && set -- required "$1" && break'
        _4 'OPTARG=$2'
        valid "$1" '$OPTARG'
        _4 'shift ;;'
    }
    _option() {
        args "$@"
        quote on "$on" && quote off "$off"
        _3 "$sw)"
        _4 'set -- "$1" "$@"'
        _4 '[ ${OPTARG+x} ] && {'
        _5 'case $1 in --no-*) set -- noarg "${1%%\=*}"; break; esac'
        _5 '[ "${OPTARG:-}" ] && { shift; OPTARG=$2; } ||' "OPTARG=$on"
        _4 "} || OPTARG=$off"
        valid "$1" '$OPTARG'
        _4 'shift ;;'
    }
    valid() {
        set -- "$validate" "$pattern" "$1" "$2"
        [ "$1" ] && _4 "$1 || { set -- ${1%% *}:\$? \"\$1\" $1; break; }"
        [ "$2" ] && {
            quote pattern "$2"
            _4 "case \$OPTARG in $2) ;;"
            _5 "*) set -- pattern:$pattern \"\$1\"; break"
            _4 "esac"
        }
        code "$3" _4 "${export:+export }$3=\"$4\"" "${3#:}"
    }
    _disp() {
        args "$@"
        _3 "$sw)"
        code "$1" _4 "echo \"\${$1}\"" "${1#:}"
        _4 'exit 0 ;;'
    }
    _msg() { :; }

    _0 "$2() {"
    _1 'OPTIND=$(($#+1))'
    _1 'while OPTARG= && [ $# -gt 0 ]; do'
    [ "$_alt" ] && _2 'case $1 in -[!-]?*) set -- "-$@"; esac'
    _2 'case $1 in'
    wa() { _4 "eval '${1% *}' \${1+'\"\$@\"'}"; }
    _3 '--?*=*) OPTARG=$1; shift'
    wa 'set -- "${OPTARG%%\=*}" "${OPTARG#*\=}" "$@"'
    _4 ';;'
    _3 '--no-*) unset OPTARG ;;'
    [ "$_alt" ] || {
        [ "$_opts" ] && {
            _3 "-[$_opts]?*) OPTARG=\$1; shift"
            wa 'set -- "${OPTARG%"${OPTARG#??}"}" "${OPTARG#??}" "$@"'
            _4 ';;'
        }
        _3 '-[!-]?*) OPTARG=$1; shift'
        wa 'set -- "${OPTARG%"${OPTARG#??}"}" "-${OPTARG#??}" "$@"'
        _4 'OPTARG= ;;'
    }
    [ "$_plus" ] && {
        _3 '+??*) OPTARG=$1; shift'
        wa 'set -- "${OPTARG%"${OPTARG#??}"}" "+${OPTARG#??}" "$@"'
        _4 'unset OPTARG ;;'
        _3 '+*) unset OPTARG ;;'
    }
    _2 'esac'
    _2 'case $1 in'
    "$@"
    rest() {
        _3 "$1"
        _4 'while [ $# -gt 0 ]; do'
        _5 "$_rest=\"\${$_rest}" '\"\${$((${OPTIND:-0}-$#))}\""'
        _5 'shift'
        _4 'done'
        _4 'break ;;'
    }
    rest '--) shift'
    _3 "[-${_plus:++}]?*)" 'set -- unknown "$1" && break ;;'
    case $_mode in
        +) rest '*)' ;;
        *) _3 "*) $_rest=\"\${$_rest}" '\"\${$((${OPTIND:-0}-$#))}\""'
    esac
    _2 'esac'
    _2 'shift'
    _1 'done'
    _1 '[ $# -eq 0 ] && { OPTIND=1; unset OPTARG; return 0; }'
    _1 'case $1 in'
    _2 'unknown) set -- "Unrecognized option: $2" "$@" ;;'
    _2 'noarg) set -- "Does not allow an argument: $2" "$@" ;;'
    _2 'required) set -- "Requires an argument: $2" "$@" ;;'
    _2 'pattern:*) set -- "Does not match the pattern (${1#*:}): $2" "$@" ;;'
    _2 '*) set -- "Validation error ($1): $2" "$@"'
    _1 'esac'
    [ "$_error" ] && _1 "$_error" '"$@" >&2 || exit $?'
    _1 'echo "$1" >&2'
    _1 'exit 1'
    _0 '}'

    # This throws an error on older versions of shellcheck.
    # shellcheck disable=2086
    [ ! "$_help" ] || eval "shift 2; getoptions_help $1 $_help" ${3+'"$@"'}
}
# URL: https://github.com/ko1nksm/getoptions (v2.0.1)
# License: Creative Commons Zero v1.0 Universal
getoptions_help() {
    width=30 plus='' leading='  '

    pad() { p=$2; while [ ${#p} -lt "$3" ]; do p="$p "; done; eval "$1=\$p"; }

    args() {
        _type=$1 var=${2%% *} sw='' label='' hidden='' _width=$width && shift 2
        while [ $# -gt 0 ] && i=$1 && shift && [ ! "$i" = '--' ]; do
            case $i in
                --*) pad sw "$sw${sw:+, }" $((${plus:+4}+4)); sw="$sw$i" ;;
                -?) sw="$sw${sw:+, }$i" ;;
                +?) [ ! "$plus" ] || { pad sw "$sw${sw:+, }" 4; sw="$sw$i"; } ;;
                *) eval "${i%%:*}=\${i#*:}"
            esac
        done
        [ "$hidden" ] && return 0

        [ "$label" ] || case $_type in
            setup | msg) label='' _width=0 ;;
            flag | disp) label="$sw " ;;
            param) label="$sw $var " ;;
            option) label="${sw}[=$var] "
        esac
        pad label "${label:+$leading}$label" "$_width"
        [ ${#label} -le "$_width" ] && [ $# -gt 0 ] && label="$label$1" && shift
        echo "$label"
        pad label '' "$_width"
        for i; do echo "$label$i"; done
    }

    for i in 'setup :' flag param option disp 'msg :'; do
        eval "${i% *}() { args $i \"\$@\"; }"
    done

    echo "$2() {"
    echo "cat<<'GETOPTIONSHERE'"
    "$@"
    echo "GETOPTIONSHERE"
    echo "}"
}

global_options() {
    msg -- '' 'Global Options:'
    flag  CPT_FORCE  -f --force                init:@export -- "Force operation"
    flag  CPT_PROMPT -y --no-prompt on:0 off:0 init:@export -- "Do not prompt for confirmation"
    param CPT_ROOT      --root                 init:@export -- "Use an alternate root directory"
    disp :usage      -h --help                              -- "Show this help message"
    disp :version    -v --version                           -- "Print version information"
}

# Local Variables:
# mode: sh
# End: