# carton(3pm) completion                                   -*- shell-script -*-

_carton_commands()
{
    local cmds=$("${1:-carton}" usage 2>&1 |
        command sed -ne '/.*command.* is one of/{n;p;q;}')
    COMPREPLY+=($(IFS="$IFS," compgen -W "$cmds" -- "$cur"))
}

_carton_command_help()
{
    local help=$(PERLDOC_PAGER=cat PERLDOC=-otext "${1:-carton}" -h $2 2>&1)
    COMPREPLY+=($(compgen -W '$help' -- "$cur"))
}

_carton()
{
    local cur prev words cword split
    _init_completion -s || return

    local i command
    for ((i = 1; i < cword; i++)); do
        case ${words[i]} in
            -*) ;;
            *)
                command=${words[i]}
                break
                ;;
        esac
    done

    if [[ ! -v command ]]; then
        _carton_commands "$1"
        return
    fi

    case $prev in
        --version | -v)
            return
            ;;
        --help | -h)
            [[ -n $command ]] || _carton_commands "$1"
            return
            ;;
        --cpanfile)
            if [[ $command == install ]]; then
                _filedir
                return
            fi
            ;;
        --path)
            if [[ $command == install ]]; then
                _filedir -d
                return
            fi
            ;;
        --without)
            if [[ $command == install ]]; then
                local phases="configure build test runtime develop"
                COMPREPLY+=($(compgen -W '$phases' -- "$cur"))
                return
            fi
            ;;
    esac

    $split && return

    if [[ $cur == -* ]]; then
        [[ $command == @(help|usage) ]] || COMPREPLY=(--help)
        _carton_command_help "$1" $command
    fi

    case $command in
        show | update)
            : # TODO modules completion
            ;;
    esac
} &&
    complete -F _carton carton

# ex: filetype=sh