_filedir_xspec.sh

_filedir_xspec()
{
    local cur prev words cword
    _init_completion || return

    _tilde "$cur" || return

    local IFS=$'\n' xspec=${_xspecs[${1##*/}]} tmp
    local -a toks
    local newest=0

    if [[ "$cur" = "?" ]] || [[ "${cur: -2}" = "/?" ]]; then
        cur="${cur:0:-1}"
        newest=1
    fi

    toks=( $(
        compgen -d -- "$(quote_readline "$cur")" | {
        while read -r tmp; do
            printf '%s\n' $tmp
        done
        }
        ))

    # Munge xspec to contain uppercase version too
    # http://thread.gmane.org/gmane.comp.shells.bash.bugs/15294/focus=15306
    eval xspec="${xspec}"
    local matchop=!
    if [[ $xspec == !* ]]; then
        xspec=${xspec#!}
        matchop=@
    fi
    xspec="$matchop($xspec|${xspec^^})"

    toks+=( $(
        eval compgen -f -X "'!$xspec'" -- "\$(quote_readline "\$cur")" | {
        while read -r tmp; do
            [[ -n $tmp ]] && printf '%s\n' $tmp
        done
        }
        ))

    if [[ ${#toks[@]} -ne 0 ]]; then
        compopt -o filenames
        if [[ $newest -eq 1 ]]; then
            newest=$(bash -c "ls -tr $cur | tail -n 1")
            COMPREPLY=( "$cur$newest" )
        else
            COMPREPLY=( "${toks[@]}" )
        fi
    fi
} # _filedir_xspec()