# Gentoo emerge completion.
#
have emerge &&
_emerge()
{
	local cur prev grepcmd sedcmd systemactions setsma setbig portagedir usepkg

 	# This is where the packages are found unless '--usepkg' is specified.
 	portagedir=/usr/portage

	COMPREPLY=()
	cur=${COMP_WORDS[COMP_CWORD]}
	prev=${COMP_WORDS[COMP_CWORD-1]}

	if [ $COMP_CWORD -eq 1 ] && [[ "$cur" == -* ]]; then
		COMPREPLY=( $( compgen -W '--pretend \
			--autoclean \
			--usepkg \
			--buildpkg' | grep ^$cur ) )
	else

		if [ "$prev" == "--usepkg" ]; then
 			if [ -e "${PKGDIR}" ]; then
  		    		portagedir=${PKGDIR}
 			else
  		    		portagedir="/usr/portage/packages"
 			fi
			usepkg="TRUE"
 			COMPREPLY=( $( compgen -f $cur ) )
		fi

		cd ${portagedir}
		grepcmd="grep -E ^$cur.*"
		sedcmd="sed -e /CVS/d \
						-e /BUGS-TODO/d \
						-e /ChangeLog.*/d \
						-e /header.txt/d \
						-e /skel.build/d \
						-e /distfiles/d \
						-e /eclass/d \
						-e /files/d \
						-e /incoming/d \
						-e /packages/d \
						-e /profiles/d \
						-e /All/d \
						-e /scripts/d"
		if [ "${usepkg}" ]; then
			setsma="`compgen -G "*/" | $sedcmd`"
			setbig="`compgen -G "*/*" | $sedcmd`"
		else
			systemactions=$'\n'"system"$'\n'"upgrade"
			setsma="`compgen -S '/' -G "*" | $sedcmd`"$systemactions
			setbig="`compgen -G "*/*" | $sedcmd`"$systemactions
		fi
		if [ $cur ]; then
			if [ `echo $cur | grep '/'` ]; then
				COMPREPLY=( $( echo "$setbig" | $grepcmd ) )
					else
				if [ `echo "$setsma" | $grepcmd | grep '/' | wc -l` = 1 ]; then
					COMPREPLY=( $( echo "$setbig" | $grepcmd ) )
				else
					COMPREPLY=( $( echo "$setsma" | $grepcmd ) )
				fi
			fi
		else
			COMPREPLY=( $( echo "$setsma" ) )
		fi
	fi
		
	return 0
}
[ "$have" ] && complete -F _emerge emerge