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_dmd_opts="$(dmd --help 2>&1 | sed -n 's/^\s*\(-\+\w*=*-*\).*/\1/p' | \
             sed 's/filename\|docdir\|directory\|path\|linkerflag\|objdir//g')"
_ld_opts_dmd="$(ld --help 2>&1 | sed -n 's/.*\(--[-a-z0-9]\{1,\}\).*/-L\1/p')"
_env_vars_dmd="$(printenv | cut -d = -f 1 | sort -u)"


_filedir_dmd()
{
    cur=$(echo "${cur}" | sed 's:^'${1}'::')
    if test "${2}" == "(*)" ;then
        _filedir
    else
        _filedir '@'${2}
    fi
    cur="${1}${cur}"
    J=0
    F=0
    for I in ${COMPREPLY[@]}
    do
        if test -d ${I} ;then
            COMPREPLY[${J}]="${1}${I}/"
        else
            COMPREPLY[${J}]="${1}${I}"
            F=1
        fi
        J=$((J + 1))
    done
    if test ${F} -eq 1 -a ${J} -eq 1 ;then
        compopt +o nospace
    fi
}


_dmd()
{
    COMPREPLY=()
    local cur
    _get_comp_words_by_ref -n = cur
    local IFS=$'\t\n'

    case "${cur}" in
        -L-L*) # match linker paths
            compopt -o nospace
            _filedir_dmd "-L-L" "(/)"
            ;;
        -L--*) # match linker options
            COMPREPLY=( $( compgen -W "${_ld_opts_dmd}" -- ${cur} ) )
            ;;
        -L*) # match linker options
            local opts=$(echo -e "-L-L\n-L--")
            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
            ;;
        -*) # match dmd options
            compopt -o nospace
            if [[ "${cur}" == "-Dd"* ]] ;then
                _filedir_dmd "-Dd" "(/)"
            elif [[ "${cur}" == "-Df"* ]] ;then
                _filedir_dmd "-Df" "(*)"
            elif [[ "${cur}" == "-debug="* ]] ;then
                cur=${cur#*=}
            elif [[ "${cur}" == "-debuglib="* ]] ;then
                cur=${cur#*=}
                _filedir
                if [ ${#COMPREPLY[@]} -eq 1 ] && [ -f ${COMPREPLY[@]} ] ;then
                    compopt +o nospace
                fi
            elif [[ "${cur}" == "-defaultlib="* ]] ;then
                cur=${cur#*=}
                _filedir
                if [ ${#COMPREPLY[@]} -eq 1 ] && [ -f ${COMPREPLY[@]} ] ;then
                    compopt +o nospace
                fi
            elif [[ "${cur}" == "-deps="* ]] ;then
                cur=${cur#*=}
                _filedir
                if [ ${#COMPREPLY[@]} -eq 1 ] && [ -f ${COMPREPLY[@]} ] ;then
                    compopt +o nospace
                fi
            elif [[ "${cur}" == "-Hd"* ]] ;then
                _filedir_dmd "-Hd" "(/)"
            elif [[ "${cur}" == "-Hf"* ]] ;then
                _filedir_dmd "-Hf" "(*)"
            elif [[ "${cur}" == "-I"* ]] ;then
                _filedir_dmd "-I" "(/)"
            elif [[ "${cur}" == "-J"* ]] ;then
                _filedir_dmd "-J" "(/)"
            elif [[ "${cur}" == "-od"* ]] ;then
                _filedir_dmd "-od" "(/)"
            elif [[ "${cur}" == "-of"* ]] ;then
                _filedir_dmd "-of" "(*)"
            elif [[ "${cur}" == "-version="* ]] ;then
                cur=${cur#*=}
            elif [[ "${cur}" == "-Xf"* ]] ;then
                _filedir_dmd "-Xf" "(*)"
            else
                COMPREPLY=( $(compgen -W "${_dmd_opts}" -- ${cur}) )
                C='\n'
                L=$(echo -e "-cov${C}-fPIC${C}-gc${C}--help${C}-ignore\
                    ${C}-inline${C}-lib${C}-m32${C}-m64${C}-man${C}-map\
                    ${C}-noboundscheck${C}-nofloat${C}-O${C}-o-${C}-op\
                    ${C}-profile${C}-property${C}-quiet${C}-release\
                    ${C}-run${C}-unittest${C}-vtls${C}-wi" | sed 's: ::g')
                if test ${#COMPREPLY[@]} -eq 1 ;then
                    for I in ${L}
                    do
                        if test "${COMPREPLY[@]}" == "$I" ; then
                            compopt +o nospace
                        fi
                    done
                fi
            fi
            ;;
        @*) # match arguments variable/file
            compopt -o nospace
            TMP=( $(compgen -W "${_env_vars_dmd}" -P "@" -- ${cur#@}) )
            _filedir_dmd "@" "(*)"
            COMPREPLY=( "${TMP[@]}" "${COMPREPLY[@]}" )
            if test ${#COMPREPLY[@]} -eq 1 ;then  compopt +o nospace ; fi
            ;;
        *) # match d files
            _filedir '@(d|dd|di|o|a|/)'
            ;;
    esac
    return 0
}


complete -F _dmd dmd