_emerge () 
{ 
    local c cur prev curword numwords opts cond prepend;
    local words stopre stophere i x;
    local action actionpos actionre sysactions eactions pkgpos;
    local version_mode searchdesc_mode help_mode resume_mode;
    local portdir=$(_portdir -o);
    COMPREPLY=();
    cur="${COMP_WORDS[COMP_CWORD]}";
    prev="${COMP_WORDS[COMP_CWORD-1]}";
    numwords=${#COMP_WORDS[*]};
    curword=${COMP_CWORD};
    actionre='@(-?([A-Za-z]*)[CPcis]*|@(metadata|s@(y@(nc|stem)|earch)|regen|@(unmerg|prune)e|world|@(@(dep)@(clean)|@(in@(fo|ject)))))';
    stopre=' @(?(--)depclean|?(--)info|?(--)metadata|regen|sy@(nc|stem)|world|--@(resume|s@(kipfirst|ync)))';
    opts='';
    if [[ ${prev} == '>' || ${prev} == '<' ]]; then
        COMPREPLY=($(compgen -f -- ${cur}));
        return 0;
    fi;
    for x in ${COMP_LINE};
    do
        if [[ ${x} == ${actionre} ]]; then
            action=${x};
            break;
        fi;
    done;
    if [[ -n "${action}" ]]; then
        for ((i = 0; i < ${numwords}; i++ ))
        do
            if [[ ${COMP_WORDS[${i}]} == "${action}" ]]; then
                actionpos=${i};
                pkgpos=$((actionpos + 1));
                break;
            fi;
        done;
        if [[ ${action} == -* && ${action} != --* ]]; then
            case "${action}" in 
                -*C*)
                    action='unmerge'
                ;;
                -*P*)
                    action='prune'
                ;;
                -*c*)
                    action='clean'
                ;;
                -*i*)
                    action='inject'
                ;;
                -*s*)
                    action='search'
                ;;
            esac;
        fi;
    else
        for ((i = 1; i < ${numwords}; i++ ))
        do
            if [[ ! "${COMP_WORDS[$i]}" == -* ]]; then
                pkgpos=${i};
                break;
            fi;
        done;
        [[ -n "${pkgpos}" ]] || pkgpos=${numwords};
    fi;
    [[ ${COMP_LINE} == *" "-@(V|-version)* ]] && version_mode=1;
    [[ ${COMP_LINE} == *" "-@(S|-searchdesc)* ]] && searchdesc_mode=1;
    [[ ${COMP_LINE} == *" "-@(h|-help)* ]] && help_mode=1;
    if [[ "${action}" == 'search' ]] || [[ -n "${searchdesc_mode}" ]] || [[ -n "${version_mode}" ]] || [[ "${action}" == 'metadata' ]]; then
        unset COMPREPLY;
        return 0;
    else
        if [[ -n "${help_mode}" ]]; then
            unset COMPREPLY;
            [[ ${curword} -eq 2 ]] && COMPREPLY=($(compgen -W 'config sync system' -- ${cur}));
            return 0;
        fi;
    fi;
    if [[ "${cur}" == -* ]]; then
        [[ ${COMP_LINE} == *--@(resume|skipfirst)* ]] && resume_mode=1;
        if [[ -n "${resume_mode}" ]]; then
            if [[ "${cur}" == --* ]]; then
                opts="--ask --pretend --resume --skipfirst";
            else
                if [[ "${cur}" == -* ]]; then
                    [[ ${COMP_LINE} == *--@(ask|pretend)* ]] && ask_premode=1;
                    [[ -n "${ask_premode}" ]] && opts="-a -p";
                fi;
            fi;
        else
            if [[ "${cur}" == --* ]]; then
                opts="--ask --autoclean 		--buildpkg --buildpkgonly 		--changelog --clean --columns 		--debug --deep 		--emptytree 		--fetch-all-uri --fetchonly 		--getbinpkg --getbinpkgonly 		--newuse --noconfmem --nodeps --noreplace --nospinner
		--oneshot --onlydeps 		--pretend 		--quiet 		--sync 		--tree 		--update --upgradeonly --usepkg --usepkgonly 		--verbose --depclean --info --search";
                if [[ ${curword} -eq 1 ]] && [[ ${numwords} -eq 2 ]]; then
                    opts="${opts} --help --resume --searchdesc --version";
                fi;
            else
                if [[ "${cur}" == -* ]]; then
                    opts="-B -D -G -K -O -U -a -b -d -e -f -g -k -l -n -o -p -q -t -u -v";
                    if [[ ${curword} -eq 1 ]] && [[ ${numwords} -eq 2 ]]; then
                        opts="${opts} -h -S -V";
                    fi;
                    if [[ -z "${action}" ]] && [[ ${curword} -eq $((pkgpos - 1)) ]]; then
                        opts="${opts} -C -P -c -i -s";
                    fi;
                fi;
            fi;
        fi;
        COMPREPLY=($(compgen -W "${opts}" -- ${cur}));
        COMPREPLY=($(echo "${COMP_WORDS[@]}" |             (while read -d ' ' i; do
		[[ "${i}" == "" ]] && continue
		# flatten array with spaces on either side,
		# otherwise we cannot grep on word boundaries of
		# first and last word
		COMPREPLY=" ${COMPREPLY[@]} "
		# remove word from list of completions
		COMPREPLY=(${COMPREPLY/ ${i%% *} / })
	    done
	    echo ${COMPREPLY[@]})));
        return 0;
    fi;
    if [[ ${COMP_LINE} == *${stopre}* ]]; then
        unset COMPREPLY;
        return 0;
    fi;
    if [[ "${action}" == 'unmerge' ]]; then
        if [[ -n "${cur}" ]]; then
            if [[ "${cur}" == */* ]]; then
                words=$(builtin cd /var/db/pkg; compgen -G "${cur}*");
            else
                words=$(builtin cd /var/db/pkg; compgen -S '/' -G "${cur}*");
                local n=0;
                for i in ${words};
                do
                    [[ ${i} == ${cur}* ]] && n=$((n+1));
                done;
                if [[ ${n} -eq 1 ]]; then
                    words="$(builtin cd /var/db/pkg ; compgen -G "*-*/*")";
                fi;
            fi;
            COMPREPLY=($(for i in ${words} ; do                             [[ ${i} == ${cur}* ]] && echo ${i} ;                         done));
        else
            COMPREPLY=($(builtin cd /var/db/pkg ; compgen -S '/' -G "*-*"));
        fi;
        [[ -z "${COMPREPLY}" ]] && _pkgname_only ${cur} /var/db/pkg;
        return 0;
    fi;
    cond="${cur%%[A-Za-z0-9]*}";
    cur="${cur:${#cond}}";
    if [[ ${cond:0:1} == "'" || ${cond:0:1} == '"' ]]; then
        prepend="-P ${cond:1}";
        c="${cond:1}";
    else
        c="${cond}";
    fi;
    if [[ -n "${cond}" ]]; then
        if [[ -n "${cur}" ]]; then
            if [[ ${cur} == */* ]]; then
                if [[ ${cur} == *-[0-9]* ]]; then
                    words="$(                        for pd in ${portdir} ; do                             builtin cd ${pd} ;                             local cat="${cur%/*}" ;                             local pkg="$(echo ${cur%-[0-9]*})" ;                             pkg="${pkg##*/}" ;                             for x in ${cat}/${pkg}/*.ebuild ; do                                 [[ -f ${x} ]] || continue ;                                 x="${x/${pkg}\/}" ;                                 echo "${x%*.ebuild}" ;                             done ;                         done)";
                else
                    words="$(                    for pd in ${portdir} ; do                         builtin cd ${pd};                         compgen -X "*metadata.xml" -G "${cur}*" -- ${cur} ;                     done)";
                fi;
                local w;
                for x in $words;
                do
                    w="${x}\n${w}";
                done;
                words=$(echo -ne ${w} | sort | uniq);
                COMPREPLY=(${words});
                if [[ ${#COMPREPLY[@]} -le 1 ]]; then
                    COMPREPLY=($(                        for pd in ${portdir} ; do                             if [[ -d ${pd}/metadata/cache ]] ; then
                                builtin cd ${pd}/metadata/cache;                                 compgen ${prepend} -G "${cur}*" -- "${cur}" ;                             else                                 builtin cd ${pd} ;                                 local cat="${cur%/*}" ;                                 local pkg="$(echo ${cur%-[0-9]*}*)" ;                                 pkg="${pkg##*/}" ;                                 for x in ${cat}/${pkg}/*.ebuild ; do                                     [[ -f "${x}" ]] || continue ;                                     x="${x/${pkg}\/}" ;                                     if [[ ${cond:0:1} == "'" ]] ||                                         [[ ${cond:0:1} == '"' ]] ; then 
                                        echo "${c}${x%*.ebuild}" ;                                     else
                                        echo "${x%*.ebuild}" ;                                     fi ;                                 done ;                             fi ;                         done));
                else
                    COMPREPLY=($(compgen ${prepend} -W "${words}" -- $cur));
                fi;
            else
                words="$(                    for pd in ${portdir} ; do                         builtin cd ${pd} ;                         compgen ${prepend} -S '/' -G "${cur}*" -- "${cur}" ;                     done)";
                local w;
                for x in words;
                do
                    w="${x}\n${w}";
                done;
                COMPREPLY=($(echo -e ${w} | uniq));
                [[ ${#COMPREPLY[@]} = 1 ]] && COMPREPLY=($(                        for pd in ${portdir} ; do                             builtin cd ${pd} ;                             compgen ${prepend} -G "${cur}*/*" -- "${cur}" ;                         done));
            fi;
        else
            words="$(                for pd in ${portdir} ; do                     builtin cd ${pd};                     compgen -G "*-*";                 done)";
            COMPREPLY=($(compgen -W "${words}" -- "${cur}"));
        fi;
        if [[ -z "${COMPREPLY}" ]]; then
            words="$(                for pd in ${portdir} ; do                     builtin cd ${pd};                     for i in *-*/${cur}*; do                         [[ -d $i ]] && echo ${i##*/};                     done ;                 done)";
            COMPREPLY=($(compgen ${prepend} -W "${words}" -- ${cur}));
            if [[ ${#COMPREPLY[@]} -le 1 ]]; then
                words="$(                    for pd in ${portdir} ; do                         if [[ -d ${pd}/metadata/cache ]] ; then                             builtin cd ${pd}/metadata/cache;                             for i in */${cur}*; do                                 [[ -f $i ]] && echo ${i##*/};                             done ;                         fi ;                     done)";
                COMPREPLY=($(compgen ${prepend} -W "${words}" -- "${cur}"));
            fi;
        fi;
        return 0;
    fi;
    if [[ ${COMP_CWORD} -eq 1 ]]; then
        if [[ $numwords -le 2 ]]; then
            sysactions='
'"system"'
'"world"'
'"sync"'
'"metadata";
        else
            sysactions='
'"system"'
'"world"'
'"sync";
        fi;
    else
        if [[ ! " ${COMP_LINE} " == *" "*[/]*" "* ]]; then
            sysactions='
'"system"'
'"world";
        else
            sysactions='';
        fi;
    fi;
    if [[ -z "${action}" ]] && [[ ${curword} -le ${pkgpos} ]]; then
        eactions='
'"clean"'
'"depclean"'
'"inject"'
'"prune"'
'"regen"'
'"search"'
'"unmerge";
    fi;
    if [[ -n "${cur}" ]]; then
        if [[ ${cur} == virtual/* ]]; then
            words=$(                for pd in ${portdir} ; do                     if [[ -d ${pd}/profiles ]] ; then
                        find ${pd}/profiles -name virtuals -exec                             sed -n -e 's|^\(virtual/[[:alnum:]]\+\).*$|\1|p' {} \; |                             sort -u
                    fi ;                 done);
        else
            if [[ ${cur} == */* ]]; then
                words=$( eix "${cur}"|grep '^\*'|cut -c 3- )"${sysactions}""${eactions}";
            else
                local ww=$(                for pd in ${portdir} ; do                     builtin cd ${pd} ;                     compgen -S '/' -G "${cur}*";                 done)"${sysactions}""${eactions}";
                ww="${ww} $(                for pd in ${portdir} ; do                     if [[ -d ${pd}/profiles ]] ; then
                        find ${pd}/profiles -name virtuals -exec                             sed -n -e 's|^\(virtual/[[:alnum:]]\+\).*$|\1|p' {} \; |                             sort -u
                    fi ;                 done)";
                local w;
                for x in ${ww};
                do
                    w="${x}\n${w}";
                done;
                words=$(echo -e ${w} | sort -u);
                local n=0;
                for i in ${words};
                do
                    [[ ${i} == ${cur}* ]] && n=$((n+1));
                done;
                if [[ ${n} -eq 1 ]]; then
                    words=$(for pd in ${portdir} ; do                             builtin cd ${pd} ;                             compgen -G "*-*/*" ;                         done)"${sysactions}""${eactions}";
                fi;
            fi;
        fi;
        COMPREPLY=($(for i in ${words} ; do                         [[ ${i} == ${cur}* ]] && echo ${i} ;                     done));
    else
        words="$(            for pd in ${portdir} ; do                 builtin cd ${pd} ;                 compgen -S '/' -G "*-*" ;             done)""${sysactions}""${eactions}";
        COMPREPLY=($(compgen -W "${words}" -- ${cur}));
    fi;
    if [[ -z "${COMPREPLY}" ]]; then
        words="$( eix ${cur}|grep '^\*'|sed 's@.*/@@' )";
        COMPREPLY=($(compgen -W "${words}" -- ${cur}));
    fi;
    return 0
}