#!/bin/bash
# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

PORTAGE_BIN_PATH="${PORTAGE_BIN_PATH:-/usr/lib/portage/bin}"
PORTAGE_PYM_PATH="${PORTAGE_PYM_PATH:-/usr/lib/portage/pym}"

SANDBOX_PREDICT="${SANDBOX_PREDICT}:/proc/self/maps:/dev/console:/dev/random"
export SANDBOX_PREDICT
export SANDBOX_WRITE="${SANDBOX_WRITE}:/dev/shm:/dev/stdout:/dev/stderr:${PORTAGE_TMPDIR}"
export SANDBOX_READ="${SANDBOX_READ}:/:/dev/shm:/dev/stdin:${PORTAGE_TMPDIR}"
# Don't use sandbox's BASH_ENV for new shells because it does
# 'source /etc/profile' which can interfere with the build
# environment by modifying our PATH.
unset BASH_ENV

# sandbox's bashrc sources /etc/profile which unsets ROOTPATH,
# so we have to back it up and restore it.
if [ -n "${PORTAGE_ROOTPATH}" ] ; then
	export ROOTPATH=${PORTAGE_ROOTPATH}
	unset PORTAGE_ROOTPATH
fi

if [ ! -z "${PORTAGE_GPG_DIR}" ]; then
	SANDBOX_PREDICT="${SANDBOX_PREDICT}:${PORTAGE_GPG_DIR}"
fi

# These two functions wrap sourcing and calling respectively.  At present they
# perform a qa check to make sure eclasses and ebuilds and profiles don't mess
# with shell opts (shopts).  Ebuilds/eclasses changing shopts should reset them 
# when they are done.  Note:  For now these shoudl always return success.

qa_source() {
	local shopts=$(shopt) OLDIFS="$IFS"
	local retval
	source "$@"
	retval=$?
	[[ $shopts != $(shopt) ]] &&
		eqawarn "QA Notice: Global shell options changed and were not restored while sourcing '$*'"
	[[ "$IFS" != "$OLDIFS" ]] &&
		eqawarn "QA Notice: Global IFS changed and was not restored while sourcing '$*'"
	return $retval
}

qa_call() {
	local shopts=$(shopt) OLDIFS="$IFS"
	local retval
	"$@"
	retval=$?
	[[ $shopts != $(shopt) ]] &&
		eqawarn "QA Notice: Global shell options changed and were not restored while calling '$*'"
	[[ "$IFS" != "$OLDIFS" ]] &&
		eqawarn "QA Notice: Global IFS changed and was not restored while calling '$*'"
	return $retval
}

# subshell die support
EBUILD_MASTER_PID=$$
trap 'exit 1' SIGTERM

EBUILD_SH_ARGS="$*"

shift $#

# Prevent aliases from causing portage to act inappropriately.
# Make sure it's before everything so we don't mess aliases that follow.
unalias -a

# Unset some variables that break things.
unset GZIP BZIP BZIP2 CDPATH GREP_OPTIONS GREP_COLOR GLOBIGNORE

export PATH="/usr/local/sbin:/sbin:/usr/sbin:${PORTAGE_BIN_PATH}:/usr/local/bin:/bin:/usr/bin:${ROOTPATH}"
[ ! -z "$PREROOTPATH" ] && export PATH="${PREROOTPATH%%:}:$PATH"

source "${PORTAGE_BIN_PATH}/isolated-functions.sh"  &>/dev/null

# Set IMAGE for minimal backward compatibility with
# overlays or user's bashrc, but don't export it.
[ "${EBUILD_PHASE}" == "preinst" ] && IMAGE=${D}

[[ $PORTAGE_QUIET != "" ]] && export PORTAGE_QUIET

# the sandbox is disabled by default except when overridden in the relevant stages
export SANDBOX_ON="0"

# sandbox support functions; defined prior to profile.bashrc srcing, since the profile might need to add a default exception (/usr/lib64/conftest fex)
addread() {
	[[ -z $1 || -n $2 ]] && die "Usage: addread <colon-delimited list of paths>"
	export SANDBOX_READ="$SANDBOX_READ:$1"
}

addwrite() {
	[[ -z $1 || -n $2 ]] && die "Usage: addwrite <colon-delimited list of paths>"
	export SANDBOX_WRITE="$SANDBOX_WRITE:$1"
}

adddeny() {
	[[ -z $1 || -n $2 ]] && die "Usage: adddeny <colon-delimited list of paths>"
	export SANDBOX_DENY="$SANDBOX_DENY:$1"
}

addpredict() {
	[[ -z $1 || -n $2 ]] && die "Usage: addpredict <colon-delimited list of paths>"
	export SANDBOX_PREDICT="$SANDBOX_PREDICT:$1"
}

lchown() {
	chown -h "$@"
}

lchgrp() {
	chgrp -h "$@"
}

esyslog() {
	# Custom version of esyslog() to take care of the "Red Star" bug.
	# MUST follow functions.sh to override the "" parameter problem.
	return 0
}

use() {
	useq ${1}
}

usev() {
	if useq ${1}; then
		echo "${1}"
		return 0
	fi
	return 1
}

useq() {
	local u=$1
	local found=0

	# if we got something like '!flag', then invert the return value
	if [[ ${u:0:1} == "!" ]] ; then
		u=${u:1}
		found=1
	fi

	# Make sure we have this USE flag in IUSE
	if [[ -n ${PORTAGE_IUSE} ]] && \
		[[ -n ${EBUILD_PHASE} ]] && \
		! hasq ${EBUILD_PHASE} config depend info prerm postrm postinst && \
		[[ ${EMERGE_FROM} != binary ]] ; then
		# TODO: Implement PORTAGE_IUSE for binary packages. Currently,
		# it is only valid for build time phases.
		[[ $u =~ $PORTAGE_IUSE ]] || \
			eqawarn "QA Notice: USE Flag '${u}' not" \
				"in IUSE for ${CATEGORY}/${PF}"
	fi

	if hasq ${u} ${USE} ; then
		return ${found}
	else
		return $((!found))
	fi
}

has_version() {
	if [ "${EBUILD_PHASE}" == "depend" ]; then
		die "portageq calls (has_version calls portageq) are not allowed in the global scope"
	fi
	# return shell-true/shell-false if exists.
	# Takes single depend-type atoms.
	PYTHONPATH=${PORTAGE_PYM_PATH}${PYTHONPATH:+:}${PYTHONPATH} \
	"${PORTAGE_BIN_PATH}"/portageq has_version "${ROOT}" "$1"
	local retval=$?
	case "${retval}" in
		0)
			return 0
			;;
		1)
			return 1
			;;
		*)
			die "unexpected portageq exit code: ${retval}"
			;;
	esac
}

portageq() {
	if [ "${EBUILD_PHASE}" == "depend" ]; then
		die "portageq calls are not allowed in the global scope"
	fi
	PYTHONPATH=${PORTAGE_PYM_PATH}${PYTHONPATH:+:}${PYTHONPATH} \
	"${PORTAGE_BIN_PATH}/portageq" "$@"
}


# ----------------------------------------------------------------------------
# ----------------------------------------------------------------------------
# ----------------------------------------------------------------------------


best_version() {
	if [ "${EBUILD_PHASE}" == "depend" ]; then
		die "portageq calls (best_version calls portageq) are not allowed in the global scope"
	fi
	# returns the best/most-current match.
	# Takes single depend-type atoms.
	PYTHONPATH=${PORTAGE_PYM_PATH}${PYTHONPATH:+:}${PYTHONPATH} \
	"${PORTAGE_BIN_PATH}/portageq" 'best_version' "${ROOT}" "$1"
	local retval=$?
	case "${retval}" in
		0)
			return 0
			;;
		1)
			return 1
			;;
		*)
			die "unexpected portageq exit code: ${retval}"
			;;
	esac
}

use_with() {
	if [ -z "$1" ]; then
		echo "!!! use_with() called without a parameter." >&2
		echo "!!! use_with <USEFLAG> [<flagname> [value]]" >&2
		return 1
	fi

	local UW_SUFFIX=""
	if [ ! -z "${3}" ]; then
		UW_SUFFIX="=${3}"
	fi

	local UWORD="$2"
	if [ -z "${UWORD}" ]; then
		UWORD="$1"
	fi

	if useq $1; then
		echo "--with-${UWORD}${UW_SUFFIX}"
	else
		echo "--without-${UWORD}"
	fi
	return 0
}

use_enable() {
	if [ -z "$1" ]; then
		echo "!!! use_enable() called without a parameter." >&2
		echo "!!! use_enable <USEFLAG> [<flagname> [value]]" >&2
		return 1
	fi

	local UE_SUFFIX=""
	if [ ! -z "${3}" ]; then
		UE_SUFFIX="=${3}"
	fi

	local UWORD="$2"
	if [ -z "${UWORD}" ]; then
		UWORD="$1"
	fi

	if useq $1; then
		echo "--enable-${UWORD}${UE_SUFFIX}"
	else
		echo "--disable-${UWORD}"
	fi
	return 0
}

register_die_hook() {
	export EBUILD_DEATH_HOOKS="${EBUILD_DEATH_HOOKS} $*"
}

# Ensure that $PWD is sane whenever possible.
if ! hasq "$EBUILD_PHASE" clean depend help ; then
	cd "$PORTAGE_BUILDDIR" || \
		die "PORTAGE_BUILDDIR does not exist: '$PORTAGE_BUILDDIR'"
fi

#if no perms are specified, dirs/files will have decent defaults
#(not secretive, but not stupid)
umask 022
export DESTTREE=/usr
export INSDESTTREE=""
export _E_EXEDESTTREE_=""
export _E_DOCDESTTREE_=""
export INSOPTIONS="-m0644"
export EXEOPTIONS="-m0755"
export LIBOPTIONS="-m0644"
export DIROPTIONS="-m0755"
export MOPREFIX=${PN}

check_KV() {
	if [ -z "${KV}" ]; then
		eerror ""
		eerror "Could not determine your kernel version."
		eerror "Make sure that you have a /usr/src/linux symlink,"
		eerror "and that the indicated kernel has been configured."
		eerror "You can also simply run the following command"
		eerror "in the directory referenced by /usr/src/linux:"
		eerror " make include/linux/version.h"
		eerror ""
		die
	fi
}

# adds ".keep" files so that dirs aren't auto-cleaned
keepdir() {
	dodir "$@"
	local x
	if [ "$1" == "-R" ] || [ "$1" == "-r" ]; then
		shift
		find "$@" -type d -printf "${D}%p/.keep_${CATEGORY}_${PN}-${SLOT}\n" \
			| tr "\n" "\0" | ${XARGS} -0 -n100 touch || \
			die "Failed to recursively create .keep files"
	else
		for x in "$@"; do
			touch "${D}${x}/.keep_${CATEGORY}_${PN}-${SLOT}" || \
				die "Failed to create .keep in ${D}${x}"
		done
	fi
}

unpack() {
	local srcdir
	local x
	local y
	local myfail
	local tar_opts=""
	[ -z "$*" ] && die "Nothing passed to the 'unpack' command"

	for x in "$@"; do
		vecho ">>> Unpacking ${x} to ${PWD}"
		y=${x%.*}
		y=${y##*.}

		if [[ ${x} == "./"* ]] ; then
			srcdir=""
		elif [[ ${x} == ${DISTDIR%/}/* ]] ; then
			die "Arguments to unpack() cannot begin with \${DISTDIR}."
		elif [[ ${x} == "/"* ]] ; then
			die "Arguments to unpack() cannot be absolute"
		else
			srcdir="${DISTDIR}/"
		fi
		[[ ! -s ${srcdir}${x} ]] && die "${x} does not exist"

		myfail="failure unpacking ${x}"
		case "${x##*.}" in
			tar)
				tar xof "${srcdir}${x}" ${tar_opts} || die "$myfail"
				;;
			tgz)
				tar xozf "${srcdir}${x}" ${tar_opts} || die "$myfail"
				;;
			tbz|tbz2)
				bzip2 -dc "${srcdir}${x}" | tar xof - ${tar_opts}
				assert "$myfail"
				;;
			ZIP|zip|jar)
				unzip -qo "${srcdir}${x}" || die "$myfail"
				;;
			gz|Z|z)
				if [ "${y}" == "tar" ]; then
					tar zoxf "${srcdir}${x}" ${tar_opts} || die "$myfail"
				else
					gzip -dc "${srcdir}${x}" > ${x%.*} || die "$myfail"
				fi
				;;
			bz2|bz)
				if [ "${y}" == "tar" ]; then
					bzip2 -dc "${srcdir}${x}" | tar xof - ${tar_opts}
					assert "$myfail"
				else
					bzip2 -dc "${srcdir}${x}" > ${x%.*} || die "$myfail"
				fi
				;;
			7Z|7z)
				local my_output
				my_output="$(7z x -y "${srcdir}${x}")"
				if [ $? -ne 0 ]; then
					echo "${my_output}" >&2
					die "$myfail"
				fi
				;;
			RAR|rar)
				unrar x -idq -o+ "${srcdir}${x}" || die "$myfail"
				;;
			LHa|LHA|lha|lzh)
				lha xfq "${srcdir}${x}" || die "$myfail"
				;;
			a)
				ar x "${srcdir}${x}" || die "$myfail"
				;;
			deb)
				# Unpacking .deb archives can not always be done with
				# `ar`.  For instance on AIX this doesn't work out.  If
				# we have `deb2targz` installed, prefer it over `ar` for
				# that reason.  We just make sure on AIX `deb2targz` is
				# installed.
				if type -P deb2targz > /dev/null; then
					deb2targz "${srcdir}/${x}" || die "$myfail"
					mv "${srcdir}/${x/.deb/.tar.gz}" data.tar.gz
				else
					ar x "${srcdir}/${x}" || die "$myfail"
				fi
				;;
			lzma)
				if [ "${y}" == "tar" ]; then
					lzma -dc "${srcdir}${x}" | tar xof - ${tar_opts}
					assert "$myfail"
				else
					lzma -dc "${srcdir}${x}" > ${x%.*} || die "$myfail"
				fi
				;;
			*)
				vecho "unpack ${x}: file format not recognized. Ignoring."
				;;
		esac
	done
	# Do not chmod '.' since it's probably ${WORKDIR} and PORTAGE_WORKDIR_MODE
	# should be preserved.
	find . -mindepth 1 -maxdepth 1 ! -type l -print0 | \
		${XARGS} -0 chmod -fR a+rX,u+w,g-w,o-w
}

strip_duplicate_slashes() {
	if [[ -n $1 ]] ; then
		local removed=$1
		while [[ ${removed} == *//* ]] ; do
			removed=${removed//\/\///}
		done
		echo ${removed}
	fi
}

econf() {
	local x
	local LOCAL_EXTRA_ECONF="${EXTRA_ECONF}"

	! hasq "$EAPI" 0 1 && [[ $EBUILD_PHASE = compile && \
		$(type -t src_configure) = function ]] && \
		eqawarn "econf called in src_compile instead of src_configure"

	if [ -z "${ECONF_SOURCE}" ]; then
		ECONF_SOURCE="."
	fi
	if [ -x "${ECONF_SOURCE}/configure" ]; then
		if [ -e /usr/share/gnuconfig/ ]; then
			find "${WORKDIR}" -type f '(' \
			-name config.guess -o -name config.sub ')' -print0 | \
			while read -d $'\0' x ; do
				vecho " * econf: updating ${x/${WORKDIR}\/} with /usr/share/gnuconfig/${x##*/}"
				cp -f /usr/share/gnuconfig/"${x##*/}" "${x}"
			done
		fi

		if [ ! -z "${CBUILD}" ]; then
			LOCAL_EXTRA_ECONF="--build=${CBUILD} ${LOCAL_EXTRA_ECONF}"
		fi

		if [ ! -z "${CTARGET}" ]; then
			LOCAL_EXTRA_ECONF="--target=${CTARGET} ${LOCAL_EXTRA_ECONF}"
		fi

		# if the profile defines a location to install libs to aside from default, pass it on.
		# if the ebuild passes in --libdir, they're responsible for the conf_libdir fun.
		LIBDIR_VAR="LIBDIR_${ABI}"
		if [ -n "${ABI}" -a -n "${!LIBDIR_VAR}" ]; then
			CONF_LIBDIR="${!LIBDIR_VAR}"
		fi
		unset LIBDIR_VAR
		if [ -n "${CONF_LIBDIR}" ] && [ "${*/--libdir}" == "$*" ]; then
			if [ "${*/--exec-prefix}" != "$*" ]; then
				local args="$(echo $*)"
				local -a pref=($(echo ${args/*--exec-prefix[= ]}))
				CONF_PREFIX=${pref}
				[ "${CONF_PREFIX:0:1}" != "/" ] && CONF_PREFIX="/${CONF_PREFIX}"
			elif [ "${*/--prefix}" != "$*" ]; then
				local args="$(echo $*)"
				local -a pref=($(echo ${args/*--prefix[= ]}))
				CONF_PREFIX=${pref}
				[ "${CONF_PREFIX:0:1}" != "/" ] && CONF_PREFIX="/${CONF_PREFIX}"
			else
				CONF_PREFIX="/usr"
			fi
			export CONF_PREFIX
			[ "${CONF_LIBDIR:0:1}" != "/" ] && CONF_LIBDIR="/${CONF_LIBDIR}"

			CONF_LIBDIR_RESULT="$(strip_duplicate_slashes ${CONF_PREFIX}${CONF_LIBDIR})"

			LOCAL_EXTRA_ECONF="--libdir=${CONF_LIBDIR_RESULT} ${LOCAL_EXTRA_ECONF}"
		fi

		local TMP_CONFCACHE_DIR CONFCACHE_ARG
		if hasq confcache $FEATURES && ! hasq confcache $RESTRICT; then
			CONFCACHE="$(type -P confcache)"
			if [ -z "${CONFCACHE}" ]; then
				ewarn "disabling confcache, binary cannot be found"
			else
				CONFCACHE="${CONFCACHE/ /\ }"
				TMP_CONFCACHE_DIR="${CONFCACHE:+${CONFCACHE_DIR:-${PORTAGE_TMPDIR}/confcache}}"
				TMP_CONFCACHE_DIR="${TMP_CONFCACHE_DIR/ /\ }"
				CONFCACHE_ARG="--confcache-dir"
				local s
				if [ -n "$CCACHE_DIR" ]; then
					s="$CCACHE_DIR"
				fi
				if [ -n "$DISTCC_DIR" ]; then
					s="${s:+${s}:}$DISTCC_DIR"
				fi
				if [ -n "$s" ]; then
					CONFCACHE_ARG="--confcache-ignore $s $CONFCACHE_ARG"
				fi
			fi
		else
			CONFCACHE=
		fi

		vecho ${CONFCACHE} ${CONFCACHE_ARG} ${TMP_CONFCACHE_DIR} "${ECONF_SOURCE}/configure" \
			--prefix=/usr \
			--host=${CHOST} \
			--mandir=/usr/share/man \
			--infodir=/usr/share/info \
			--datadir=/usr/share \
			--sysconfdir=/etc \
			--localstatedir=/var/lib \
			"$@" \
			${LOCAL_EXTRA_ECONF}

		if ! ${CONFCACHE} ${CONFCACHE_ARG} ${TMP_CONFCACHE_DIR} "${ECONF_SOURCE}/configure" \
			--prefix=/usr \
			--host=${CHOST} \
			--mandir=/usr/share/man \
			--infodir=/usr/share/info \
			--datadir=/usr/share \
			--sysconfdir=/etc \
			--localstatedir=/var/lib \
			"$@"  \
			${LOCAL_EXTRA_ECONF}; then

			if [ -s config.log ]; then
				echo
				echo "!!! Please attach the following file when seeking support:"
				echo "!!! ${PWD}/config.log"
			fi
			die "econf failed"
		fi
	elif [ -f "${ECONF_SOURCE:-.}/configure" ]; then
		die "configure is not executable"
	else
		die "no configure script found"
	fi
}

einstall() {
	# CONF_PREFIX is only set if they didn't pass in libdir above.
	local LOCAL_EXTRA_EINSTALL="${EXTRA_EINSTALL}"
	LIBDIR_VAR="LIBDIR_${ABI}"
	if [ -n "${ABI}" -a -n "${!LIBDIR_VAR}" ]; then
		CONF_LIBDIR="${!LIBDIR_VAR}"
	fi
	unset LIBDIR_VAR
	if [ -n "${CONF_LIBDIR}" ] && [ "${CONF_PREFIX:-unset}" != "unset" ]; then
		EI_DESTLIBDIR="${D}/${CONF_PREFIX}/${CONF_LIBDIR}"
		EI_DESTLIBDIR="$(strip_duplicate_slashes ${EI_DESTLIBDIR})"
		LOCAL_EXTRA_EINSTALL="libdir=${EI_DESTLIBDIR} ${LOCAL_EXTRA_EINSTALL}"
		unset EI_DESTLIBDIR
	fi

	if [ -f ./[mM]akefile -o -f ./GNUmakefile ] ; then
		if [ "${PORTAGE_DEBUG}" == "1" ]; then
			${MAKE:-make} -n prefix="${D}usr" \
				datadir="${D}usr/share" \
				infodir="${D}usr/share/info" \
				localstatedir="${D}var/lib" \
				mandir="${D}usr/share/man" \
				sysconfdir="${D}etc" \
				${LOCAL_EXTRA_EINSTALL} \
				"$@" install
		fi
		${MAKE:-make} prefix="${D}usr" \
			datadir="${D}usr/share" \
			infodir="${D}usr/share/info" \
			localstatedir="${D}var/lib" \
			mandir="${D}usr/share/man" \
			sysconfdir="${D}etc" \
			${LOCAL_EXTRA_EINSTALL} \
			"$@" install || die "einstall failed"
	else
		die "no Makefile found"
	fi
}

_eapi0_pkg_nofetch() {
	[ -z "${SRC_URI}" ] && return

	echo "!!! The following are listed in SRC_URI for ${PN}:"
	local x
	for x in $(echo ${SRC_URI}); do
		echo "!!!   ${x}"
	done
}

_eapi0_src_unpack() {
	[[ -n ${A} ]] && unpack ${A}
}

_eapi0_src_compile() {
	if [ -x ./configure ] ; then
		econf
	fi
	_eapi2_src_compile
}

_eapi0_src_test() {
	if emake -j1 check -n &> /dev/null; then
		vecho ">>> Test phase [check]: ${CATEGORY}/${PF}"
		if ! emake -j1 check; then
			hasq test $FEATURES && die "Make check failed. See above for details."
			hasq test $FEATURES || eerror "Make check failed. See above for details."
		fi
	elif emake -j1 test -n &> /dev/null; then
		vecho ">>> Test phase [test]: ${CATEGORY}/${PF}"
		if ! emake -j1 test; then
			hasq test $FEATURES && die "Make test failed. See above for details."
			hasq test $FEATURES || eerror "Make test failed. See above for details."
		fi
	else
		vecho ">>> Test phase [none]: ${CATEGORY}/${PF}"
	fi
}

_eapi1_src_compile() {
	_eapi2_src_configure
	_eapi2_src_compile
}

_eapi2_src_configure() {
	if [[ -x ${ECONF_SOURCE:-.}/configure ]] ; then
		econf
	fi
}

_eapi2_src_compile() {
	if [ -f Makefile ] || [ -f GNUmakefile ] || [ -f makefile ]; then
		emake || die "emake failed"
	fi
}

ebuild_phase() {
	[ "$(type -t ${1})" == "function" ] && qa_call ${1}
}

ebuild_phase_with_hooks() {
	local x phase_name=${1}
	for x in {pre_,,post_}${phase_name} ; do
		ebuild_phase ${x}
	done
}

dyn_setup() {
	ebuild_phase_with_hooks pkg_setup
}

dyn_unpack() {
	[ "$(type -t pre_src_unpack)" == "function" ] && qa_call pre_src_unpack
	local newstuff="no"
	if [ -e "${WORKDIR}" ]; then
		local x
		local checkme
		for x in ${AA}; do
			vecho ">>> Checking ${x}'s mtime..."
			if [ "${PORTAGE_ACTUAL_DISTDIR:-${DISTDIR}}/${x}" -nt "${WORKDIR}" ]; then
				vecho ">>> ${x} has been updated; recreating WORKDIR..."
				newstuff="yes"
				break
			fi
		done
		if [ "${EBUILD}" -nt "${WORKDIR}" ] && ! hasq keepwork ${FEATURES} ; then
			vecho ">>> ${EBUILD} has been updated; recreating WORKDIR..."
			newstuff="yes"
		elif [ ! -f "${PORTAGE_BUILDDIR}/.unpacked" ]; then
			vecho ">>> Not marked as unpacked; recreating WORKDIR..."
			newstuff="yes"
		fi
	fi
	if [ "${newstuff}" == "yes" ]; then
		# We don't necessarily have privileges to do a full dyn_clean here.
		rm -rf "${PORTAGE_BUILDDIR}"/{.unpacked,.compiled,.tested,.packaged,build-info}
		rm -rf "${WORKDIR}"
		if [ -d "${T}" ] && \
			! hasq keeptemp $FEATURES && ! hasq keepwork $FEATURES ; then
			rm -rf "${T}" && mkdir "${T}"
		fi
	fi
	if [ -e "${WORKDIR}" ]; then
		if [ "$newstuff" == "no" ]; then
			vecho ">>> WORKDIR is up-to-date, keeping..."
			[ "$(type -t post_src_unpack)" == "function" ] && qa_call post_src_unpack
			return 0
		fi
	fi

	if [ ! -d "${WORKDIR}" ]; then
		install -m${PORTAGE_WORKDIR_MODE:-0700} -d "${WORKDIR}" || die "Failed to create dir '${WORKDIR}'"
	fi
	cd "${WORKDIR}" || die "Directory change failed: \`cd '${WORKDIR}'\`"
	vecho ">>> Unpacking source..."
	ebuild_phase src_unpack
	touch "${PORTAGE_BUILDDIR}/.unpacked" || die "IO Failure -- Failed 'touch .unpacked' in ${PORTAGE_BUILDDIR}"
	vecho ">>> Source unpacked."
	cd "${PORTAGE_BUILDDIR}"

	[ "$(type -t post_src_unpack)" == "function" ] && qa_call post_src_unpack
}

dyn_clean() {
	if [ -z "${PORTAGE_BUILDDIR}" ]; then
		echo "Aborting clean phase because PORTAGE_BUILDDIR is unset!"
		return 1
	elif [ ! -d "${PORTAGE_BUILDDIR}" ] ; then
		return 0
	fi
	if type -P chflags > /dev/null ; then
		chflags -R noschg,nouchg,nosappnd,nouappnd "${PORTAGE_BUILDDIR}"
		chflags -R nosunlnk,nouunlnk "${PORTAGE_BUILDDIR}" 2>/dev/null
	fi

	rm -rf "${PORTAGE_BUILDDIR}/image" "${PORTAGE_BUILDDIR}/homedir"
	rm -f "${PORTAGE_BUILDDIR}/.installed"

	if ! hasq keeptemp $FEATURES && ! hasq keepwork $FEATURES ; then
		rm -rf "${T}"
	fi

	if ! hasq keepwork $FEATURES; then
		rm -f "$PORTAGE_BUILDDIR"/.{exit_status,logid,unpacked,prepared} \
			"$PORTAGE_BUILDDIR"/.{configured,compiled,tested,packaged}

		rm -rf "${PORTAGE_BUILDDIR}/build-info"
		rm -rf "${WORKDIR}"
	fi

	if [ -f "${PORTAGE_BUILDDIR}/.unpacked" ]; then
		find "${PORTAGE_BUILDDIR}" -type d ! -regex "^${WORKDIR}" | sort -r | tr "\n" "\0" | $XARGS -0 rmdir &>/dev/null
	fi

	# do not bind this to doebuild defined DISTDIR; don't trust doebuild, and if mistakes are made it'll
	# result in it wiping the users distfiles directory (bad).
	rm -rf "${PORTAGE_BUILDDIR}/distdir"

	# Some kernels, such as Solaris, return EINVAL when an attempt
	# is made to remove the current working directory.
	cd "$PORTAGE_BUILDDIR"/..
	rmdir "$PORTAGE_BUILDDIR" 2>/dev/null

	true
}

into() {
	if [ "$1" == "/" ]; then
		export DESTTREE=""
	else
		export DESTTREE=$1
		if [ ! -d "${D}${DESTTREE}" ]; then
			install -d "${D}${DESTTREE}"
		fi
	fi
}

insinto() {
	if [ "$1" == "/" ]; then
		export INSDESTTREE=""
	else
		export INSDESTTREE=$1
		if [ ! -d "${D}${INSDESTTREE}" ]; then
			install -d "${D}${INSDESTTREE}"
		fi
	fi
}

exeinto() {
	if [ "$1" == "/" ]; then
		export _E_EXEDESTTREE_=""
	else
		export _E_EXEDESTTREE_="$1"
		if [ ! -d "${D}${_E_EXEDESTTREE_}" ]; then
			install -d "${D}${_E_EXEDESTTREE_}"
		fi
	fi
}

docinto() {
	if [ "$1" == "/" ]; then
		export _E_DOCDESTTREE_=""
	else
		export _E_DOCDESTTREE_="$1"
		if [ ! -d "${D}usr/share/doc/${PF}/${_E_DOCDESTTREE_}" ]; then
			install -d "${D}usr/share/doc/${PF}/${_E_DOCDESTTREE_}"
		fi
	fi
}

insopts() {
	export INSOPTIONS="$@"

	# `install` should never be called with '-s' ...
	hasq -s ${INSOPTIONS} && die "Never call insopts() with -s"
}

diropts() {
	export DIROPTIONS="$@"
}

exeopts() {
	export EXEOPTIONS="$@"

	# `install` should never be called with '-s' ...
	hasq -s ${EXEOPTIONS} && die "Never call exeopts() with -s"
}

libopts() {
	export LIBOPTIONS="$@"

	# `install` should never be called with '-s' ...
	hasq -s ${LIBOPTIONS} && die "Never call libopts() with -s"
}

abort_handler() {
	local msg
	if [ "$2" != "fail" ]; then
		msg="${EBUILD}: ${1} aborted; exiting."
	else
		msg="${EBUILD}: ${1} failed; exiting."
	fi
	echo
	echo "$msg"
	echo
	eval ${3}
	#unset signal handler
	trap SIGINT SIGQUIT
}

abort_prepare() {
	abort_handler src_prepare $1
	rm -f "$PORTAGE_BUILDDIR/.prepared"
	exit 1
}

abort_configure() {
	abort_handler src_configure $1
	rm -f "$PORTAGE_BUILDDIR/.configured"
	exit 1
}

abort_compile() {
	abort_handler "src_compile" $1
	rm -f "${PORTAGE_BUILDDIR}/.compiled"
	exit 1
}

abort_test() {
	abort_handler "dyn_test" $1
	rm -f "${PORTAGE_BUILDDIR}/.tested"
	exit 1
}

abort_install() {
	abort_handler "src_install" $1
	rm -rf "${PORTAGE_BUILDDIR}/image"
	exit 1
}

dyn_prepare() {

	if [[ $PORTAGE_BUILDDIR/.prepared -nt $WORKDIR ]] ; then
		vecho ">>> It appears that '$PF' is already prepared; skipping."
		vecho ">>> Remove '$PORTAGE_BUILDDIR/.prepared' to force prepare."
		return 0
	fi

	local srcdir
	if [[ -d $S ]] ; then
		srcdir=$S
	else
		srcdir=$WORKDIR
	fi
	cd "$srcdir"

	trap abort_prepare SIGINT SIGQUIT

	ebuild_phase pre_src_prepare
	ebuild_phase src_prepare
	touch "$PORTAGE_BUILDDIR"/.prepared
	ebuild_phase post_src_prepare

	trap SIGINT SIGQUIT
}

dyn_configure() {

	if [[ $PORTAGE_BUILDDIR/.configured -nt $WORKDIR ]] ; then
		vecho ">>> It appears that '$PF' is already configured; skipping."
		vecho ">>> Remove '$PORTAGE_BUILDDIR/.configured' to force configuration."
		return 0
	fi

	trap abort_configure SIGINT SIGQUIT

	[[ $(type -t pre_src_configure) = function ]] && \
		qa_call pre_src_configure

	vecho ">>> Configuring source in $srcdir ..."
	ebuild_phase src_configure
	touch "$PORTAGE_BUILDDIR"/.configured
	vecho ">>> Source configured."

	[[ $(type -t post_src_configure) = function ]] && \
		qa_call post_src_configure

	trap SIGINT SIGQUIT
}

dyn_compile() {

	if [[ $PORTAGE_BUILDDIR/.compiled -nt $WORKDIR ]] ; then
		vecho ">>> It appears that '${PF}' is already compiled; skipping."
		vecho ">>> Remove '$PORTAGE_BUILDDIR/.compiled' to force compilation."
		return 0
	fi

	trap abort_compile SIGINT SIGQUIT

	[[ $(type -t pre_src_compile) = function ]] && \
		qa_call pre_src_compile

	vecho ">>> Compiling source in ${srcdir} ..."
	ebuild_phase src_compile
	touch "$PORTAGE_BUILDDIR"/.compiled
	vecho ">>> Source compiled."

	[ "$(type -t post_src_compile)" == "function" ] && qa_call post_src_compile

	trap SIGINT SIGQUIT
}

dyn_test() {
	if [ "${EBUILD_FORCE_TEST}" == "1" ] ; then
		rm -f "${PORTAGE_BUILDDIR}/.tested"
		# If USE came from ${T}/environment then it might not have USE=test
		# like it's supposed to here.
		! hasq test ${USE} && export USE="${USE} test"
	fi
	[ "$(type -t pre_src_test)" == "function" ] && qa_call pre_src_test
	if [ "${PORTAGE_BUILDDIR}/.tested" -nt "${WORKDIR}" ]; then
		vecho ">>> It appears that ${PN} has already been tested; skipping."
		[ "$(type -t post_src_test)" == "function" ] && qa_call post_src_test
		return
	fi
	trap "abort_test" SIGINT SIGQUIT
	if [ -d "${S}" ]; then
		cd "${S}"
	else
		cd "${WORKDIR}"
	fi
	if ! hasq test $FEATURES && [ "${EBUILD_FORCE_TEST}" != "1" ]; then
		vecho ">>> Test phase [not enabled]: ${CATEGORY}/${PF}"
	elif hasq test $RESTRICT; then
		ewarn "Skipping make test/check due to ebuild restriction."
		vecho ">>> Test phase [explicitly disabled]: ${CATEGORY}/${PF}"
	else
		addpredict /
		ebuild_phase src_test
		SANDBOX_PREDICT="${SANDBOX_PREDICT%:/}"
	fi

	cd "${PORTAGE_BUILDDIR}"
	touch .tested || die "Failed to 'touch .tested' in ${PORTAGE_BUILDDIR}"
	[ "$(type -t post_src_test)" == "function" ] && qa_call post_src_test
	trap SIGINT SIGQUIT
}

dyn_install() {
	[ -z "$PORTAGE_BUILDDIR" ] && die "${FUNCNAME}: PORTAGE_BUILDDIR is unset"
	if hasq noauto $FEATURES ; then
		rm -f "${PORTAGE_BUILDDIR}/.installed"
	elif [[ ${PORTAGE_BUILDDIR}/.installed -nt ${WORKDIR} ]] ; then
		vecho ">>> It appears that '${PF}' is already installed; skipping."
		vecho ">>> Remove '${PORTAGE_BUILDDIR}/.installed' to force install."
		return 0
	fi
	trap "abort_install" SIGINT SIGQUIT
	[ "$(type -t pre_src_install)" == "function" ] && qa_call pre_src_install
	rm -rf "${PORTAGE_BUILDDIR}/image"
	mkdir "${PORTAGE_BUILDDIR}/image"
	if [ -d "${S}" ]; then
		cd "${S}"
	else
		cd "${WORKDIR}"
	fi
	vecho
	vecho ">>> Install ${PF} into ${D} category ${CATEGORY}"
	#our custom version of libtool uses $S and $D to fix
	#invalid paths in .la files
	export S D
	#some packages uses an alternative to $S to build in, cause
	#our libtool to create problematic .la files
	export PWORKDIR="$WORKDIR"

	# Reset exeinto(), docinto(), insinto(), and into() state variables
	# in case the user is running the install phase multiple times
	# consecutively via the ebuild command.
	export DESTTREE=/usr
	export INSDESTTREE=""
	export _E_EXEDESTTREE_=""
	export _E_DOCDESTTREE_=""

	ebuild_phase src_install
	touch "${PORTAGE_BUILDDIR}/.installed"
	vecho ">>> Completed installing ${PF} into ${D}"
	vecho
	cd ${PORTAGE_BUILDDIR}
	[ "$(type -t post_src_install)" == "function" ] && qa_call post_src_install

	cd "${PORTAGE_BUILDDIR}"/build-info
	set -f
	local f
	for f in ASFLAGS CATEGORY CBUILD CC CFLAGS CHOST CTARGET CXX \
		CXXFLAGS DEPEND EXTRA_ECONF EXTRA_EINSTALL EXTRA_MAKE \
		FEATURES INHERITED IUSE LDFLAGS LIBCFLAGS LIBCXXFLAGS \
		LICENSE PDEPEND PF PKGUSE PROPERTIES PROVIDE RDEPEND RESTRICT SLOT \
		KEYWORDS HOMEPAGE SRC_URI DESCRIPTION; do
		[ -n "${!f}" ] && echo $(echo "${!f}" | \
			tr '\n,\r,\t' ' , , ' | sed s/'  \+'/' '/g) > ${f}
	done
	echo "${USE}"       > USE
	echo "${EAPI:-0}"   > EAPI
	set +f

	# local variables can leak into the saved environment.
	unset f

	save_ebuild_env --exclude-init-phases | filter_readonly_variables \
		--filter-sandbox --allow-extra-vars > environment

	bzip2 -f9 environment

	cp "${EBUILD}" "${PF}.ebuild"
	[ -n "${PORTAGE_REPO_NAME}" ]  && echo "${PORTAGE_REPO_NAME}" > repository
	if hasq nostrip ${FEATURES} ${RESTRICT} || hasq strip ${RESTRICT}
	then
		touch DEBUGBUILD
	fi
	trap SIGINT SIGQUIT
}

dyn_preinst() {
	if [ -z "${D}" ]; then
		eerror "${FUNCNAME}: D is unset"
		return 1
	fi
	ebuild_phase_with_hooks pkg_preinst
}

dyn_help() {
	echo
	echo "Portage"
	echo "Copyright 1999-2008 Gentoo Foundation"
	echo
	echo "How to use the ebuild command:"
	echo
	echo "The first argument to ebuild should be an existing .ebuild file."
	echo
	echo "One or more of the following options can then be specified.  If more"
	echo "than one option is specified, each will be executed in order."
	echo
	echo "  help        : show this help screen"
	echo "  setup       : execute package specific setup actions"
	echo "  fetch       : download source archive(s) and patches"
	echo "  digest      : create a manifest file for the package"
	echo "  manifest    : create a manifest file for the package"
	echo "  unpack      : unpack sources (auto-dependencies if needed)"
	echo "  prepare     : prepare sources (auto-dependencies if needed)"
	echo "  configure   : configure sources (auto-fetch/unpack if needed)"
	echo "  compile     : compile sources (auto-fetch/unpack/configure if needed)"
	echo "  test        : test package (auto-fetch/unpack/configure/compile if needed)"
	echo "  preinst     : execute pre-install instructions"
	echo "  postinst    : execute post-install instructions"
	echo "  install     : install the package to the temporary install directory"
	echo "  qmerge      : merge image into live filesystem, recording files in db"
	echo "  merge       : do fetch, unpack, compile, install and qmerge"
	echo "  prerm       : execute pre-removal instructions"
	echo "  postrm      : execute post-removal instructions"
	echo "  unmerge     : remove package from live filesystem"
	echo "  config      : execute package specific configuration actions"
	echo "  package     : create a tarball package in ${PKGDIR}/All"
	echo "  rpm         : build a RedHat RPM package"
	echo "  clean       : clean up all source and temporary files"
	echo
	echo "The following settings will be used for the ebuild process:"
	echo
	echo "  package     : ${PF}"
	echo "  slot        : ${SLOT}"
	echo "  category    : ${CATEGORY}"
	echo "  description : ${DESCRIPTION}"
	echo "  system      : ${CHOST}"
	echo "  c flags     : ${CFLAGS}"
	echo "  c++ flags   : ${CXXFLAGS}"
	echo "  make flags  : ${MAKEOPTS}"
	echo -n "  build mode  : "
	if hasq nostrip ${FEATURES} ${RESTRICT} || hasq strip ${RESTRICT} ;
	then
		echo "debug (large)"
	else
		echo "production (stripped)"
	fi
	echo "  merge to    : ${ROOT}"
	echo
	if [ -n "$USE" ]; then
		echo "Additionally, support for the following optional features will be enabled:"
		echo
		echo "  ${USE}"
	fi
	echo
}

# debug-print() gets called from many places with verbose status information useful
# for tracking down problems. The output is in $T/eclass-debug.log.
# You can set ECLASS_DEBUG_OUTPUT to redirect the output somewhere else as well.
# The special "on" setting echoes the information, mixing it with the rest of the
# emerge output.
# You can override the setting by exporting a new one from the console, or you can
# set a new default in make.*. Here the default is "" or unset.

# in the future might use e* from /etc/init.d/functions.sh if i feel like it
debug-print() {
	# if $T isn't defined, we're in dep calculation mode and
	# shouldn't do anything
	[ ! -d "$T" ] && return 0

	while [ "$1" ]; do

		# extra user-configurable targets
		if [ "$ECLASS_DEBUG_OUTPUT" == "on" ]; then
			echo "debug: $1" >&2
		elif [ -n "$ECLASS_DEBUG_OUTPUT" ]; then
			echo "debug: $1" >> $ECLASS_DEBUG_OUTPUT
		fi

		# default target
		echo "$1" 2>/dev/null >> "${T}/eclass-debug.log"
		# let the portage user own/write to this file
		chmod g+w "${T}/eclass-debug.log" &>/dev/null

		shift
	done
}

# The following 2 functions are debug-print() wrappers

debug-print-function() {
	str="$1: entering function"
	shift
	debug-print "$str, parameters: $*"
}

debug-print-section() {
	debug-print "now in section $*"
}

# Sources all eclasses in parameters
declare -ix ECLASS_DEPTH=0
inherit() {
	ECLASS_DEPTH=$(($ECLASS_DEPTH + 1))
	if [[ ${ECLASS_DEPTH} > 1 ]]; then
		debug-print "*** Multiple Inheritence (Level: ${ECLASS_DEPTH})"
	fi

	local location
	local olocation
	local PECLASS

	local B_IUSE
	local B_DEPEND
	local B_RDEPEND
	local B_PDEPEND
	while [ "$1" ]; do
		location="${ECLASSDIR}/${1}.eclass"
		olocation=""

		# PECLASS is used to restore the ECLASS var after recursion.
		PECLASS="$ECLASS"
		export ECLASS="$1"

		if [ "${EBUILD_PHASE}" != "depend" ] && \
			[[ ${EBUILD_PHASE} != *rm ]] && \
			[[ ${EMERGE_FROM} != "binary" ]] ; then
			# This is disabled in the *rm phases because they frequently give
			# false alarms due to INHERITED in /var/db/pkg being outdated
			# in comparison the the eclasses from the portage tree.
			if ! hasq $ECLASS $INHERITED; then
				eqawarn "QA Notice: ECLASS '$ECLASS' inherited illegally in $CATEGORY/$PF $EBUILD_PHASE"
			fi
		fi

		# any future resolution code goes here
		if [ -n "$PORTDIR_OVERLAY" ]; then
			local overlay
			for overlay in ${PORTDIR_OVERLAY}; do
				olocation="${overlay}/eclass/${1}.eclass"
				if [ -e "$olocation" ]; then
					location="${olocation}"
					debug-print "  eclass exists: ${location}"
				fi
			done
		fi
		debug-print "inherit: $1 -> $location"
		[ ! -e "$location" ] && die "${1}.eclass could not be found by inherit()"

		if [ "${location}" == "${olocation}" ] && \
			! hasq "${location}" ${EBUILD_OVERLAY_ECLASSES} ; then
				EBUILD_OVERLAY_ECLASSES="${EBUILD_OVERLAY_ECLASSES} ${location}"
		fi

		#We need to back up the value of DEPEND and RDEPEND to B_DEPEND and B_RDEPEND
		#(if set).. and then restore them after the inherit call.

		#turn off glob expansion
		set -f

		# Retain the old data and restore it later.
		unset B_IUSE B_DEPEND B_RDEPEND B_PDEPEND
		[ "${IUSE-unset}"    != "unset" ] && B_IUSE="${IUSE}"
		[ "${DEPEND-unset}"  != "unset" ] && B_DEPEND="${DEPEND}"
		[ "${RDEPEND-unset}" != "unset" ] && B_RDEPEND="${RDEPEND}"
		[ "${PDEPEND-unset}" != "unset" ] && B_PDEPEND="${PDEPEND}"
		unset IUSE DEPEND RDEPEND PDEPEND
		#turn on glob expansion
		set +f

		qa_source "$location" || die "died sourcing $location in inherit()"
		
		#turn off glob expansion
		set -f

		# If each var has a value, append it to the global variable E_* to
		# be applied after everything is finished. New incremental behavior.
		[ "${IUSE-unset}"    != "unset" ] && export E_IUSE="${E_IUSE} ${IUSE}"
		[ "${DEPEND-unset}"  != "unset" ] && export E_DEPEND="${E_DEPEND} ${DEPEND}"
		[ "${RDEPEND-unset}" != "unset" ] && export E_RDEPEND="${E_RDEPEND} ${RDEPEND}"
		[ "${PDEPEND-unset}" != "unset" ] && export E_PDEPEND="${E_PDEPEND} ${PDEPEND}"

		[ "${B_IUSE-unset}"    != "unset" ] && IUSE="${B_IUSE}"
		[ "${B_IUSE-unset}"    != "unset" ] || unset IUSE

		[ "${B_DEPEND-unset}"  != "unset" ] && DEPEND="${B_DEPEND}"
		[ "${B_DEPEND-unset}"  != "unset" ] || unset DEPEND

		[ "${B_RDEPEND-unset}" != "unset" ] && RDEPEND="${B_RDEPEND}"
		[ "${B_RDEPEND-unset}" != "unset" ] || unset RDEPEND

		[ "${B_PDEPEND-unset}" != "unset" ] && PDEPEND="${B_PDEPEND}"
		[ "${B_PDEPEND-unset}" != "unset" ] || unset PDEPEND

		#turn on glob expansion
		set +f

		hasq $1 $INHERITED || export INHERITED="$INHERITED $1"

		export ECLASS="$PECLASS"

		shift
	done
	((--ECLASS_DEPTH)) # Returns 1 when ECLASS_DEPTH reaches 0.
	return 0
}

# Exports stub functions that call the eclass's functions, thereby making them default.
# For example, if ECLASS="base" and you call "EXPORT_FUNCTIONS src_unpack", the following
# code will be eval'd:
# src_unpack() { base_src_unpack; }
EXPORT_FUNCTIONS() {
	if [ -z "$ECLASS" ]; then
		echo "EXPORT_FUNCTIONS without a defined ECLASS" >&2
		exit 1
	fi
	while [ "$1" ]; do
		debug-print "EXPORT_FUNCTIONS: ${1} -> ${ECLASS}_${1}"
		eval "$1() { ${ECLASS}_$1 \"\$@\" ; }" > /dev/null
		shift
	done
}

# adds all parameters to E_DEPEND and E_RDEPEND, which get added to DEPEND
# and RDEPEND after the ebuild has been processed. This is important to
# allow users to use DEPEND="foo" without frying dependencies added by an
# earlier inherit. It also allows RDEPEND to work properly, since a lot
# of ebuilds assume that an unset RDEPEND gets its value from DEPEND.
# Without eclasses, this is true. But with them, the eclass may set
# RDEPEND itself (or at least used to) which would prevent RDEPEND from
# getting its value from DEPEND. This is a side-effect that made eclasses
# have unreliable dependencies.

newdepend() {
	debug-print-function newdepend $*
	debug-print "newdepend: E_DEPEND=$E_DEPEND E_RDEPEND=$E_RDEPEND"

	while [ -n "$1" ]; do
		case $1 in
		"/autotools")
			do_newdepend DEPEND sys-devel/autoconf sys-devel/automake sys-devel/make
			;;
		"/c")
			do_newdepend DEPEND sys-devel/gcc virtual/libc
			do_newdepend RDEPEND virtual/libc
			;;
		*)
			do_newdepend DEPEND $1
			;;
		esac
		shift
	done
}

newrdepend() {
	debug-print-function newrdepend $*
	do_newdepend RDEPEND $1
}

newpdepend() {
	debug-print-function newpdepend $*
	do_newdepend PDEPEND $1
}

do_newdepend() {
	# This function does a generic change determining whether we're in an
	# eclass or not. If we are, we change the E_* variables for deps.
	debug-print-function do_newdepend $*
	[ -z "$1" ] && die "do_newdepend without arguments"

	# Grab what we're affecting... Figure out if we're affecting eclasses.
	[[ ${ECLASS_DEPTH} > 0 ]] && TARGET="E_$1"
	[[ ${ECLASS_DEPTH} > 0 ]] || TARGET="$1"
	shift # $1 was a variable name.

	while [ -n "$1" ]; do
		# This bit of evil takes TARGET and uses it to evaluate down to a
		# variable. This is a sneaky way to make this infinately expandable.
		# The normal translation of this would look something like this:
		# E_DEPEND="${E_DEPEND} $1"  ::::::  Cool, huh? :)
		eval export ${TARGET}=\"\${${TARGET}} \$1\"
		shift
	done
}

# this is a function for removing any directory matching a passed in pattern from
# PATH
remove_path_entry() {
	save_IFS
	IFS=":"
	stripped_path="${PATH}"
	while [ -n "$1" ]; do
		cur_path=""
		for p in ${stripped_path}; do
			if [ "${p/${1}}" == "${p}" ]; then
				cur_path="${cur_path}:${p}"
			fi
		done
		stripped_path="${cur_path#:*}"
		shift
	done
	restore_IFS
	PATH="${stripped_path}"
}

# @FUNCTION: _ebuild_arg_to_phase
# @DESCRIPTION:
# Translate a known ebuild(1) argument into the precise
# name of it's corresponding ebuild phase.
_ebuild_arg_to_phase() {
	[ $# -ne 2 ] && die "expected exactly 2 args, got $#: $*"
	local eapi=$1
	local arg=$2
	local phase_func=""

	case "$arg" in
		setup)
			phase_func=pkg_setup
			;;
		nofetch)
			phase_func=pkg_nofetch
			;;
		unpack)
			phase_func=src_unpack
			;;
		prepare)
			phase_func=src_prepare
			;;
		configure)
			! hasq $eapi 0 1 2_pre1 && \
				phase_func=src_configure
			;;
		compile)
			phase_func=src_compile
			;;
		test)
			phase_func=src_test
			;;
		install)
			phase_func=src_install
			;;
		preinst)
			phase_func=pkg_preinst
			;;
		postinst)
			phase_func=pkg_postinst
			;;
		prerm)
			phase_func=pkg_prerm
			;;
		postrm)
			phase_func=pkg_postrm
			;;
	esac

	[[ -z $phase_func ]] && return 1
	echo "$phase_func"
	return 0
}

_ebuild_phase_funcs() {
	[ $# -ne 2 ] && die "expected exactly 2 args, got $#: $*"
	local eapi=$1
	local phase_func=$2
	local default_phases="pkg_nofetch src_unpack src_prepare src_configure
		src_compile src_install src_test"
	local x y default_func=""

	for x in pkg_nofetch src_unpack src_test ; do
		[[ $(type -t $x) = function ]] || \
			eval "$x() { _eapi0_$x \"\$@\" ; }"
	done

	case $eapi in

		0|1|2_pre1)

			if [[ $(type -t src_compile) != function ]] ; then
				case $eapi in
					0)
						src_compile() { _eapi0_src_compile "$@" ; }
						;;
					*)
						src_compile() { _eapi1_src_compile "$@" ; }
						;;
				esac
			fi

			for x in $default_phases ; do
				eval "default_$x() {
					die \"default_$x() is not supported with EAPI='$eapi' during phase $phase_func\"
				}"
			done

			eval "default() {
				die \"default() is not supported with EAPI='$eapi' during phase $phase_func\"
			}"

			;;

		*)

			[[ $(type -t src_configure) = function ]] || \
				src_configure() { _eapi2_src_configure "$@" ; }

			[[ $(type -t src_compile) = function ]] || \
				src_compile() { _eapi2_src_compile "$@" ; }

			if hasq $phase_func $default_phases ; then

				_eapi2_pkg_nofetch   () { _eapi0_pkg_nofetch          "$@" ; }
				_eapi2_src_unpack    () { _eapi0_src_unpack           "$@" ; }
				_eapi2_src_prepare   () { true                             ; }
				_eapi2_src_test      () { _eapi0_src_test             "$@" ; }
				_eapi2_src_install   () { die "$FUNCNAME is not supported" ; }

				for x in $default_phases ; do
					eval "default_$x() { _eapi2_$x \"\$@\" ; }"
				done

				eval "default() { _eapi2_$phase_func \"\$@\" ; }"

			else

				for x in $default_phases ; do
					eval "default_$x() {
						die \"default_$x() is not supported in phase $default_func\"
					}"
				done

				eval "default() {
					die \"default() is not supported with EAPI='$eapi' during phase $phase_func\"
				}"

			fi

			;;
	esac
}

# @FUNCTION: source_all_bashrcs
# @DESCRIPTION:
# Source a relevant bashrc files and perform other miscellaneous
# environment initialization when appropriate.
#
# If EAPI is set then define functions provided by the current EAPI:
#
#  * default_* aliases for the current EAPI phase functions
#  * A "default" function which is an alias for the default phase
#    function for the current phase.
#
source_all_bashrcs() {
	[ -n "$EBUILD_PHASE" ] || return
	local x

	if [[ -n $EAPI ]] ; then
		local phase_func=$(_ebuild_arg_to_phase "$EAPI" $EBUILD_PHASE)
		[[ -n $phase_func ]] && _ebuild_phase_funcs "$EAPI" $phase_func
	fi

	local OCC="${CC}" OCXX="${CXX}"
	# source the existing profile.bashrc's.
	save_IFS
	IFS=$'\n'
	local path_array=($PROFILE_PATHS)
	restore_IFS
	for x in "${path_array[@]}" ; do
		[ -f "${x}/profile.bashrc" ] && qa_source "${x}/profile.bashrc"
	done

	# We assume if people are changing shopts in their bashrc they do so at their
	# own peril.  This is the ONLY non-portage bit of code that can change shopts
	# without a QA violation.
	if [ -f "${PORTAGE_BASHRC}" ]; then
		# If $- contains x, then tracing has already enabled elsewhere for some
		# reason.  We preserve it's state so as not to interfere.
		if [ "$PORTAGE_DEBUG" != "1" ] || [ "${-/x/}" != "$-" ]; then
			source "${PORTAGE_BASHRC}"
		else
			set -x
			source "${PORTAGE_BASHRC}"
			set +x
		fi
	fi
	[ ! -z "${OCC}" ] && export CC="${OCC}"
	[ ! -z "${OCXX}" ] && export CXX="${OCXX}"
}

# Hardcoded bash lists are needed for backward compatibility with
# <portage-2.1.4 since they assume that a newly installed version
# of ebuild.sh will work for pkg_postinst, pkg_prerm, and pkg_postrm
# when portage is upgrading itself.

READONLY_EBUILD_METADATA="DEPEND DESCRIPTION
	EAPI HOMEPAGE INHERITED IUSE KEYWORDS LICENSE
	PDEPEND PROVIDE RDEPEND RESTRICT SLOT SRC_URI"

READONLY_PORTAGE_VARS="D EBUILD EBUILD_PHASE \
	EBUILD_SH_ARGS EMERGE_FROM FILESDIR PORTAGE_BINPKG_FILE \
	PORTAGE_BIN_PATH PORTAGE_IUSE \
	PORTAGE_PYM_PATH PORTAGE_MUTABLE_FILTERED_VARS \
	PORTAGE_SAVED_READONLY_VARS PORTAGE_TMPDIR T WORKDIR"

PORTAGE_SAVED_READONLY_VARS="A CATEGORY P PF PN PR PV PVR"

# Variables that portage sets but doesn't mark readonly.
# In order to prevent changed values from causing unexpected
# interference, they are filtered out of the environment when
# it is saved or loaded (any mutations do not persist).
PORTAGE_MUTABLE_FILTERED_VARS="AA HOSTNAME"

# @FUNCTION: filter_readonly_variables
# @DESCRIPTION: [--filter-sandbox] [--allow-extra-vars]
# Read an environment from stdin and echo to stdout while filtering variables
# with names that are known to cause interference:
#
#   * some specific variables for which bash does not allow assignment
#   * some specific variables that affect portage or sandbox behavior
#   * variable names that begin with a digit or that contain any
#     non-alphanumeric characters that are not be supported by bash
#
# --filter-sandbox causes all SANDBOX_* variables to be filtered, which
# is only desired in certain cases, such as during preprocessing or when
# saving environment.bz2 for a binary or installed package.
#
# --filter-features causes the special FEATURES variable to be filtered.
# Generally, we want it to persist between phases since the user might
# want to modify it via bashrc to enable things like splitdebug and
# installsources for specific packages. They should be able to modify it
# in pre_pkg_setup() and have it persist all the way through the install
# phase. However, if FEATURES exist inside environment.bz2 then they
# should be overridden by current settings.
#
# ---allow-extra-vars causes some extra vars to be allowd through, such
# as ${PORTAGE_SAVED_READONLY_VARS} and ${PORTAGE_MUTABLE_FILTERED_VARS}.
#
# In bash-3.2_p20+ an attempt to assign BASH_*, FUNCNAME, GROUPS or any
# readonly variable cause the shell to exit while executing the "source"
# builtin command. To avoid this problem, this function filters those
# variables out and discards them. See bug #190128.
filter_readonly_variables() {
	local x filtered_vars
	local readonly_bash_vars="DIRSTACK EUID FUNCNAME GROUPS
		PIPESTATUS PPID SHELLOPTS UID"
	local filtered_sandbox_vars="SANDBOX_ACTIVE SANDBOX_BASHRC
		SANDBOX_DEBUG_LOG SANDBOX_DISABLED SANDBOX_LIB
		SANDBOX_LOG SANDBOX_ON"
	filtered_vars="${readonly_bash_vars} ${READONLY_PORTAGE_VARS}
		BASH_.* PATH"
	if hasq --filter-sandbox $* ; then
		filtered_vars="${filtered_vars} SANDBOX_.*"
	else
		filtered_vars="${filtered_vars} ${filtered_sandbox_vars}"
	fi
	if hasq --filter-features $* ; then
		filtered_vars="${filtered_vars} FEATURES"
	fi
	if ! hasq --allow-extra-vars $* ; then
		filtered_vars="
			${filtered_vars}
			${PORTAGE_SAVED_READONLY_VARS}
			${PORTAGE_MUTABLE_FILTERED_VARS}
		"
	fi

	"${PORTAGE_BIN_PATH}"/filter-bash-environment.py "${filtered_vars}"
}

# @FUNCTION: preprocess_ebuild_env
# @DESCRIPTION:
# Filter any readonly variables from ${T}/environment, source it, and then
# save it via save_ebuild_env(). This process should be sufficient to prevent
# any stale variables or functions from an arbitrary environment from
# interfering with the current environment. This is useful when an existing
# environment needs to be loaded from a binary or installed package.
preprocess_ebuild_env() {
	local filter_opts=""
	if [ -f "${T}/environment.raw" ] ; then
		# This is a signal from the python side, indicating that the
		# environment may contain stale SANDBOX_{DENY,PREDICT,READ,WRITE}
		# and FEATURES variables that should be filtered out. Between
		# phases, these variables are normally preserved.
		filter_opts="--filter-sandbox --filter-features ${filter_opts}"
	fi
	filter_readonly_variables ${filter_opts} < "${T}"/environment \
		> "${T}"/environment.filtered || return $?
	unset filter_opts
	mv "${T}"/environment.filtered "${T}"/environment || return $?
	rm -f "${T}/environment.success" || return $?
	# WARNING: Code inside this subshell should avoid making assumptions
	# about variables or functions after source "${T}"/environment has been
	# called. Any variables that need to be relied upon should already be
	# filtered out above.
	(
		export SANDBOX_ON=1
		source "${T}/environment" || exit $?
		# We have to temporarily disable sandbox since the
		# SANDBOX_{DENY,READ,PREDICT,WRITE} values we've just loaded
		# may be unusable (triggering in spurious sandbox violations)
		# until we've merged them with our current values.
		export SANDBOX_ON=0

		# It's remotely possible that save_ebuild_env() has been overridden
		# by the above source command. To protect ourselves, we override it
		# here with our own version. ${PORTAGE_BIN_PATH} is safe to use here
		# because it's already filtered above.
		source "${PORTAGE_BIN_PATH}/isolated-functions.sh" || exit $?

		# Rely on save_ebuild_env() to filter out any remaining variables
		# and functions that could interfere with the current environment.
		save_ebuild_env || exit $?
		touch "${T}/environment.success" || exit $?
	) > "${T}/environment.filtered"
	local retval
	if [ -e "${T}/environment.success" ] ; then
		filter_readonly_variables < \
			"${T}/environment.filtered" > "${T}/environment"
		retval=$?
	else
		retval=1
	fi
	rm -f "${T}"/environment.{filtered,raw,success}
	return ${retval}
}

# === === === === === === === === === === === === === === === === === ===
# === === === === === functions end, main part begins === === === === ===
# === === === === === functions end, main part begins === === === === ===
# === === === === === functions end, main part begins === === === === ===
# === === === === === === === === === === === === === === === === === ===

if [ -n "${EBUILD_SH_ARGS}" ] && \
	! hasq ${EBUILD_SH_ARGS} clean depend help info nofetch ; then

	if [ "$(id -nu)" == "portage" ] ; then
		export USER=portage
	fi

	if hasq distcc ${FEATURES} ; then
		if [ -d /usr/lib/distcc/bin ]; then
			#We can enable distributed compile support
			if [ -z "${PATH/*distcc*/}" ]; then
				# Remove the other reference.
				remove_path_entry "distcc"
			fi
			export PATH="/usr/lib/distcc/bin:${PATH}"
			[ ! -z "${DISTCC_LOG}" ] && addwrite "$(dirname ${DISTCC_LOG})"
		elif which distcc &>/dev/null; then
			if ! hasq distcc $CC; then
				export CC="distcc $CC"
			fi
			if ! hasq distcc $CXX; then
				export CXX="distcc $CXX"
			fi
		fi
	fi

	if hasq ccache ${FEATURES} ; then
		#We can enable compiler cache support
		if [ -z "${PATH/*ccache*/}" ]; then
			# Remove the other reference.
			remove_path_entry "ccache"
		fi

		if [ -d /usr/lib/ccache/bin ]; then
			export PATH="/usr/lib/ccache/bin:${PATH}"
		elif [ -d /usr/bin/ccache ]; then
			export PATH="/usr/bin/ccache:${PATH}"
		fi

		[ -z "${CCACHE_DIR}" ] && export CCACHE_DIR="/var/tmp/ccache"

		addread "${CCACHE_DIR}"
		addwrite "${CCACHE_DIR}"

		[ -n "${CCACHE_SIZE}" ] && ccache -M ${CCACHE_SIZE} &> /dev/null
	else
		# Force configure scripts that automatically detect ccache to respect
		# FEATURES="-ccache"
		export CCACHE_DISABLE=1
	fi

	# XXX: Load up the helper functions.
#	for X in /usr/lib/portage/bin/functions/*.sh; do
#		source ${X} || die "Failed to source ${X}"
#	done

fi # "$*"!="depend" && "$*"!="clean" && "$*" != "setup"

export SANDBOX_ON="1"
export S=${WORKDIR}/${P}

unset E_IUSE E_DEPEND E_RDEPEND E_PDEPEND

# Turn of extended glob matching so that g++ doesn't get incorrectly matched.
shopt -u extglob

if [[ ${EBUILD_PHASE} == depend ]] ; then
	QA_INTERCEPTORS="awk bash cc egrep fgrep g++
		gawk gcc grep javac java-config nawk perl
		pkg-config python python-config sed"
elif [[ ${EBUILD_PHASE} == clean* ]] ; then
	unset QA_INTERCEPTORS
else
	QA_INTERCEPTORS="autoconf automake aclocal libtoolize"
fi
# level the QA interceptors if we're in depend
if [[ -n ${QA_INTERCEPTORS} ]] ; then
	for BIN in ${QA_INTERCEPTORS}; do
		BIN_PATH=$(type -Pf ${BIN})
		if [ "$?" != "0" ]; then
			BODY="echo \"*** missing command: ${BIN}\" >&2; return 127"
		else
			BODY="${BIN_PATH} \"\$@\"; return \$?"
		fi
		if [[ ${EBUILD_PHASE} == depend ]] ; then
			FUNC_SRC="${BIN}() {
				if [ \$ECLASS_DEPTH -gt 0 ]; then
					eqawarn \"QA Notice: '${BIN}' called in global scope: eclass \${ECLASS}\"
				else
					eqawarn \"QA Notice: '${BIN}' called in global scope: \${CATEGORY}/\${PF}\"
				fi
			${BODY}
			}"
		elif hasq ${BIN} autoconf automake aclocal libtoolize ; then
			FUNC_SRC="${BIN}() {
				if ! hasq \${FUNCNAME[1]} eautoreconf eaclocal _elibtoolize \\
					eautoheader eautoconf eautomake autotools_run_tool \\
					autotools_check_macro autotools_get_subdirs \\
					autotools_get_auxdir ; then
					eqawarn \"QA Notice: '${BIN}' called by \${FUNCNAME[1]}: \${CATEGORY}/\${PF}\"
					eqawarn \"Use autotools.eclass instead of calling '${BIN}' directly.\"
				fi
			${BODY}
			}"
		else
			FUNC_SRC="${BIN}() {
				eqawarn \"QA Notice: '${BIN}' called by \${FUNCNAME[1]}: \${CATEGORY}/\${PF}\"
			${BODY}
			}"
		fi
		eval "$FUNC_SRC" || echo "error creating QA interceptor ${BIN}" >&2
	done
	unset BIN_PATH BIN BODY FUNC_SRC
fi

if ! hasq ${EBUILD_PHASE} clean depend && \
	[ -f "${T}"/environment ] ; then
	# The environment may have been extracted from environment.bz2 or
	# may have come from another version of ebuild.sh or something.
	# In any case, preprocess it to prevent any potential interference.
	preprocess_ebuild_env || \
		die "error processing environment"
	# Colon separated SANDBOX_* variables need to be cumulative.
	for x in SANDBOX_DENY SANDBOX_READ SANDBOX_PREDICT SANDBOX_WRITE ; do
		eval PORTAGE_${x}=\${!x}
	done
	PORTAGE_SANDBOX_ON=${SANDBOX_ON}
	export SANDBOX_ON=1
	source "${T}"/environment || \
		die "error sourcing environment"
	# We have to temporarily disable sandbox since the
	# SANDBOX_{DENY,READ,PREDICT,WRITE} values we've just loaded
	# may be unusable (triggering in spurious sandbox violations)
	# until we've merged them with our current values.
	export SANDBOX_ON=0
	for x in SANDBOX_DENY SANDBOX_PREDICT SANDBOX_READ SANDBOX_WRITE ; do
		eval y=\${PORTAGE_${x}}
		if [ "${y}" != "${!x}" ] ; then
			eval export ${x}=\"$(echo -n "${y}:${!x}" | tr ":" "\0" | \
				sort -z -u | tr "\0" ":")\"
		fi
		unset PORTAGE_${x}
	done
	unset x y
	export SANDBOX_ON=${PORTAGE_SANDBOX_ON}
	unset PORTAGE_SANDBOX_ON

	# After loading the environment, make sure the color variables
	# are in sync with the current NOCOLOR setting.
	case "${NOCOLOR:-false}" in
		yes|true)
			unset_colors
			;;
		no|false)
			set_colors
			;;
	esac

	source_all_bashrcs
fi

if ! hasq ${EBUILD_PHASE} clean && \
	(
		hasq ${EBUILD_PHASE} depend || \
		[ ! -f "${T}"/environment ] || \
		hasq noauto ${FEATURES}
	) ; then
	# The bashrcs get an opportunity here to set aliases that will be expanded
	# during sourcing of ebuilds and eclasses.
	source_all_bashrcs

	# *DEPEND and IUSE will be set during the sourcing of the ebuild.
	# In order to ensure correct interaction between ebuilds and
	# eclasses, they need to be unset before this process of
	# interaction begins.
	unset DEPEND RDEPEND PDEPEND IUSE
	source "${EBUILD}" || die "error sourcing ebuild"

	if [ "${EBUILD_PHASE}" != "depend" ] ; then
		RESTRICT=${PORTAGE_RESTRICT}
	fi

	# This next line is not the same as export RDEPEND=${RDEPEND:-${DEPEND}}
	# That will test for unset *or* NULL (""). We want just to set for unset...
	# turn off glob expansion from here on in to prevent *'s and ? in the
	# DEPEND syntax from getting expanded :)
	set -f
	if [ "${RDEPEND-unset}" == "unset" ] ; then
		export RDEPEND=${DEPEND}
		debug-print "RDEPEND: not set... Setting to: ${DEPEND}"
	fi

	# add in dependency info from eclasses
	IUSE="${IUSE} ${E_IUSE}"
	DEPEND="${DEPEND} ${E_DEPEND}"
	RDEPEND="${RDEPEND} ${E_RDEPEND}"
	PDEPEND="${PDEPEND} ${E_PDEPEND}"

	unset ECLASS E_IUSE E_DEPEND E_RDEPEND E_PDEPEND
	set +f
fi

# Set default EAPI if necessary, so that most
# code can simply assume that it's defined.
[[ -n $EAPI ]] || EAPI=0

# enable bashrc support for the clean phase
[[ ${EBUILD_PHASE} == clean ]] && source_all_bashrcs

# unset USE_EXPAND variables that contain only the special "*" token
for x in ${USE_EXPAND} ; do
	[ "${!x}" == "*" ] && unset ${x}
done
unset x

if hasq nostrip ${FEATURES} ${RESTRICT} || hasq strip ${RESTRICT}
then
	export DEBUGBUILD=1
fi

#a reasonable default for $S
[[ -z ${S} ]] && export S=${WORKDIR}/${P}

#some users have $TMP/$TMPDIR to a custom dir in their home ...
#this will cause sandbox errors with some ./configure
#scripts, so set it to $T.
export TMP="${T}"
export TMPDIR="${T}"

# Note: readonly variables interfere with preprocess_ebuild_env(), so
# declare them only after it has already run.
if [ "${EBUILD_PHASE}" != "depend" ] ; then
	declare -r ${READONLY_EBUILD_METADATA} ${READONLY_PORTAGE_VARS}
fi

ebuild_main() {
	local f x
	local export_vars="ASFLAGS CCACHE_DIR CCACHE_SIZE
		CFLAGS CXXFLAGS LDFLAGS LIBCFLAGS LIBCXXFLAGS"

	case ${EBUILD_SH_ARGS} in
	nofetch)
		ebuild_phase_with_hooks pkg_nofetch
		exit 1
		;;
	prerm|postrm|postinst|config|info)
		if hasq ${EBUILD_SH_ARGS} config info && \
			[ "$(type -t pkg_${EBUILD_SH_ARGS})" != "function" ]; then
			ewarn  "pkg_${EBUILD_SH_ARGS}() is not defined: '${EBUILD##*/}'"
		fi
		export SANDBOX_ON="0"
		if [ "${PORTAGE_DEBUG}" != "1" ] || [ "${-/x/}" != "$-" ]; then
			ebuild_phase_with_hooks pkg_${EBUILD_SH_ARGS}
		else
			set -x
			ebuild_phase_with_hooks pkg_${EBUILD_SH_ARGS}
			set +x
		fi
		if [[ $EBUILD_PHASE == postinst ]] && [[ -n $PORTAGE_UPDATE_ENV ]]; then
			# Update environment.bz2 in case installation phases
			# need to pass some variables to uninstallation phases.
			save_ebuild_env --exclude-init-phases | \
				filter_readonly_variables --filter-sandbox --allow-extra-vars \
				| bzip2 -c -f9 > "$PORTAGE_UPDATE_ENV"
		fi
		;;
	unpack|prepare|configure|compile|test|clean|install)
		if [[ ${SANDBOX_DISABLED:-0} = 0 ]] ; then
			export SANDBOX_ON="1"
		else
			export SANDBOX_ON="0"
		fi

		case "$EBUILD_SH_ARGS" in
		configure|compile)

			for x in $export_vars ; do
				[[ ${!x-unset} != unset ]] && export $x
			done

			hasq distcc $FEATURES && [[ -n $DISTCC_DIR ]] && \
				[[ ${SANDBOX_WRITE/$DISTCC_DIR} = $SANDBOX_WRITE ]] && \
				addwrite "$DISTCC_DIR"

			x=LIBDIR_$ABI
			[ -z "$PKG_CONFIG_PATH" -a -n "$ABI" -a -n "${!x}" ] && \
				export PKG_CONFIG_PATH=/usr/${!x}/pkgconfig

			if hasq noauto $FEATURES && \
				[[ ! -f $PORTAGE_BUILDDIR/.unpacked ]] ; then
				echo
				echo "!!! We apparently haven't unpacked..." \
					"This is probably not what you"
				echo "!!! want to be doing... You are using" \
					"FEATURES=noauto so I'll assume"
				echo "!!! that you know what you are doing..." \
					"You have 5 seconds to abort..."
				echo

				local x
				for x in 1 2 3 4 5 6 7 8; do
					echo -ne "\a"
					LC_ALL=C sleep 0.25
				done

				sleep 3
			fi

			cd "$PORTAGE_BUILDDIR"
			if [ ! -d build-info ] ; then
				mkdir build-info
				cp "$EBUILD" "build-info/$PF.ebuild"
			fi

			local srcdir
			if [[ -d $S ]] ; then
				srcdir=$S
			else
				srcdir=$WORKDIR
			fi
			cd "$srcdir"
			#our custom version of libtool uses $S and $D to fix
			#invalid paths in .la files
			export S D
			#some packages use an alternative to $S to build in, cause
			#our libtool to create problematic .la files
			export PWORKDIR=$WORKDIR

			;;
		esac

		if [ "${PORTAGE_DEBUG}" != "1" ] || [ "${-/x/}" != "$-" ]; then
			dyn_${EBUILD_SH_ARGS}
		else
			set -x
			dyn_${EBUILD_SH_ARGS}
			set +x
		fi
		export SANDBOX_ON="0"
		;;
	help|setup|preinst)
		#pkg_setup needs to be out of the sandbox for tmp file creation;
		#for example, awking and piping a file in /tmp requires a temp file to be created
		#in /etc.  If pkg_setup is in the sandbox, both our lilo and apache ebuilds break.
		export SANDBOX_ON="0"
		if [ "${PORTAGE_DEBUG}" != "1" ] || [ "${-/x/}" != "$-" ]; then
			dyn_${EBUILD_SH_ARGS}
		else
			set -x
			dyn_${EBUILD_SH_ARGS}
			set +x
		fi
		;;
	depend)
		export SANDBOX_ON="0"
		set -f

		if [ -n "${dbkey}" ] ; then
			if [ ! -d "${dbkey%/*}" ]; then
				install -d -g ${PORTAGE_GID} -m2775 "${dbkey%/*}"
			fi
			# Make it group writable. 666&~002==664
			umask 002
		fi

		auxdbkeys="DEPEND RDEPEND SLOT SRC_URI RESTRICT HOMEPAGE LICENSE
			DESCRIPTION KEYWORDS INHERITED IUSE CDEPEND PDEPEND PROVIDE EAPI
			PROPERTIES UNUSED_06 UNUSED_05 UNUSED_04
			UNUSED_03 UNUSED_02 UNUSED_01"

		#the extra $(echo) commands remove newlines
		unset CDEPEND
		[ -n "${EAPI}" ] || EAPI=0
		if [ -n "${dbkey}" ] ; then
			> "${dbkey}"
			for f in ${auxdbkeys} ; do
				echo $(echo ${!f}) >> "${dbkey}" || exit $?
			done
		else
			for f in ${auxdbkeys} ; do
				echo $(echo ${!f}) 1>&9 || exit $?
			done
			9>&-
		fi
		set +f
		;;
	*)
		export SANDBOX_ON="1"
		echo "Unrecognized EBUILD_SH_ARGS: '${EBUILD_SH_ARGS}'"
		echo
		dyn_help
		exit 1
		;;
	esac
	[ -n "${EBUILD_EXIT_STATUS_FILE}" ] && \
		touch "${EBUILD_EXIT_STATUS_FILE}" &>/dev/null
}

[[ -n $EBUILD_SH_ARGS ]] && ebuild_main

# Save the env only for relevant phases.
if [ -n "${EBUILD_SH_ARGS}" ] && \
	! hasq ${EBUILD_SH_ARGS} clean depend help info nofetch ; then
	# Save current environment and touch a success file. (echo for success)
	umask 002
	save_ebuild_env | filter_readonly_variables > "${T}/environment"
	chown portage:portage "${T}/environment" &>/dev/null
	chmod g+w "${T}/environment" &>/dev/null
fi

# Do not exit when ebuild.sh is sourced by other scripts.
true