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

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

proc _perlfunctions
{
    setglobal 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" == -?* ]] {
        setglobal temp = $cur
        setglobal prev = $(temp:0:2)
        setglobal cur = $(temp:2)
        if [[ $prev == -d && $cur == t* ]] {
            setglobal prev = '-dt'
            setglobal cur = $(cur:1)
        }
        setglobal optPrefix = "-P$prev"
        setglobal optSuffix = '-S/'
        setglobal prefix = $prev
    }

    match $prev {
        with -D|-e|-E|-i|-F|-l
            return 0
            
        with -I|-x
            local IFS=$'\n'
            compopt -o filenames
            setglobal COMPREPLY = ''( $( compgen -d $optPrefix $optSuffix -- "$cur" ) )
            return 0
            
        with -m|-M
            setglobal temp = $(cur#-)
            setglobal prefix = $(cur%$temp)
            setglobal cur = $temp
            _perlmodules $1
            return 0
            
        with -V
            if [[ $cur == :* ]] {
                setglobal temp = $(cur##+(:))
                setglobal prefix = $(cur%$temp)
                local IFS=$'\n'
                setglobal 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
            
        with -d|-dt
            if [[ $cur == :* ]] {
                setglobal temp = $(cur#:)
                setglobal prefix = ""$prefix$(cur%$temp)""
                setglobal cur = ""Devel::$temp""
                _perlmodules $1
            }
            
    }

    if [[ "$cur" == -* ]] {
        setglobal 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" == -?* ]] {
        setglobal temp = $cur
        setglobal prev = $(temp:0:2)
        setglobal cur = $(temp:2)
        setglobal prefix = $prev
    }

    local perl="$(1%doc)"
    [[ $perl == $1 ]] || ! type $perl &>/dev/null && setglobal perl = ''

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

    if [[ "$cur" == -* ]] {
        setglobal 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* ]] {
                setglobal 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