# bash completion for perl                                 -*- shell-script -*-

proc _perlmodules {
    setvar COMPREPLY = ''( $( compgen -P "$prefix" -W \
        "$( ${1:-perl} ${BASH_SOURCE[0]%/*}/../helpers/perl modules $cur )" \
        -- "$cur" ) )
    __ltrim_colon_completions "$prefix$cur"
}

proc _perlfunctions {
    setvar COMPREPLY = ''( $( compgen -P "$prefix" -W \
        "$( ${1:-perl} ${BASH_SOURCE[0]%/*}/../helpers/perl functions $cur )" \
        -- "$cur" ) )
}

proc _perl {
    local cur prev words cword
    _init_completion -n : || return

    local prefix="" temp optPrefix optSuffix

    # If option not followed by whitespace, reassign prev and cur
    if [[ "$cur" == -?* ]] {
        setvar temp = "$cur"
        setvar prev = ${temp:0:2}
        setvar cur = ${temp:2}
        if [[ $prev == -d && $cur == t* ]] {
            setvar prev = '-dt'
            setvar cur = ${cur:1}
        }
        setvar optPrefix = "-P$prev"
        setvar optSuffix = "-S/"
        setvar prefix = "$prev"
    }

    case (prev) {
        -D|-e|-E|-i|-F|-l {
            return 0
            }
        -I|-x {
            local IFS=$'\n'
            compopt -o filenames
            setvar COMPREPLY = ''( $( compgen -d $optPrefix $optSuffix -- "$cur" ) )
            return 0
            }
        -m|-M {
            setvar temp = "${cur#-}"
            setvar prefix = "${cur%$temp}"
            setvar cur = "$temp"
            _perlmodules $1
            return 0
            }
        -V {
            if [[ $cur == :* ]] {
                setvar temp = "${cur##+(:)}"
                setvar prefix = "${cur%$temp}"
                local IFS=$'\n'
                setvar COMPREPLY = ''( $( compgen -P "$prefix" -W \
                    '$( $1 -MConfig -e "print join \"\\n\",
                        keys %Config::Config" 2>/dev/null )' -- "$temp" ) )
                __ltrim_colon_completions "$prefix$temp"
            }
            return 0
            }
        -d|-dt {
            if [[ $cur == :* ]] {
                setvar temp = "${cur#:}"
                setvar prefix = ""$prefix${cur%$temp}""
                setvar cur = ""Devel::$temp""
                _perlmodules $1
            }
            }
    }

    if [[ "$cur" == -* ]] {
        setvar COMPREPLY = ''( $( compgen -W '-C -s -T -u -U -W -X -h -v -V -c -w -d -D -p
            -n -a -F -l -0 -I -m -M -P -S -x -i -e' -- "$cur" ) )
    } else {
        _filedir
    }
} &&
complete -F _perl perl

proc _perldoc {
    local cur prev words cword
    _init_completion -n : || return

    local prefix="" temp

    # completing an option (may or may not be separated by a space)
    if [[ "$cur" == -?* ]] {
        setvar temp = "$cur"
        setvar prev = ${temp:0:2}
        setvar cur = ${temp:2}
        setvar prefix = "$prev"
    }

    local perl="${1%doc}"
    [[ $perl == $1 ]] || ! type $perl &>/dev/null && setvar perl = ''

    case (prev) {
        -h|-V|-n|-o|-M|-w|-L {
            return 0
            }
        -d {
            _filedir
            return 0
            }
        -f {
            _perlfunctions $perl
            return 0
            }
    }

    if [[ "$cur" == -* ]] {
        setvar COMPREPLY = ''( $( compgen -W '$( _parse_help "$1" -h )' -- "$cur" ) )
    } else {
        # return available modules (unless it is clearly a file)
        if [[ "$cur" != @(*/|[.~])* ]] {
            _perlmodules $perl
            if [[ $cur == p* ]] {
                setvar COMPREPLY = ''( $( compgen -W \
                    '$( PERLDOC_PAGER=/bin/cat "$1" -u perl |  \
                     sed -ne "/perl.*Perl overview/,/perlwin32/p" | \
                     awk "\$NF=2 && \$1 ~ /^perl/ { print \$1 }" )' \
                    -- "$cur" ) )
            }
        }
        _filedir 'p@([lm]|od)'
    }
} &&
complete -F _perldoc -o bashdefault perldoc

# ex: ts=4 sw=4 et filetype=sh