From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org)
	by finch.gentoo.org with esmtp (Exim 4.60)
	(envelope-from <gentoo-commits+bounces-381670-garchives=archives.gentoo.org@lists.gentoo.org>)
	id 1R2tyX-000224-7K
	for garchives@archives.gentoo.org; Mon, 12 Sep 2011 00:02:13 +0000
Received: from pigeon.gentoo.org (localhost [127.0.0.1])
	by pigeon.gentoo.org (Postfix) with SMTP id 7AAB721C0D3;
	Mon, 12 Sep 2011 00:02:05 +0000 (UTC)
Received: from smtp.gentoo.org (smtp.gentoo.org [140.211.166.183])
	by pigeon.gentoo.org (Postfix) with ESMTP id 0261921C1B5
	for <gentoo-commits@lists.gentoo.org>; Mon, 12 Sep 2011 00:02:04 +0000 (UTC)
Received: from pelican.gentoo.org (unknown [66.219.59.40])
	(using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by smtp.gentoo.org (Postfix) with ESMTPS id 3F5731B400C
	for <gentoo-commits@lists.gentoo.org>; Mon, 12 Sep 2011 00:02:04 +0000 (UTC)
Received: from localhost.localdomain (localhost [127.0.0.1])
	by pelican.gentoo.org (Postfix) with ESMTP id 470CD80042
	for <gentoo-commits@lists.gentoo.org>; Mon, 12 Sep 2011 00:02:03 +0000 (UTC)
From: "Zac Medico" <zmedico@gentoo.org>
To: gentoo-commits@lists.gentoo.org
Content-type: text/plain; charset=UTF-8
Reply-To: gentoo-dev@lists.gentoo.org, "Zac Medico" <zmedico@gentoo.org>
Message-ID: <8d2db38d565f852537211c80153f56a251b84f3a.zmedico@gentoo>
Subject: [gentoo-commits] proj/portage:master commit in: bin/
X-VCS-Repository: proj/portage
X-VCS-Files: bin/ebuild.sh bin/phase-functions.sh
X-VCS-Directories: bin/
X-VCS-Committer: zmedico
X-VCS-Committer-Name: Zac Medico
X-VCS-Revision: 8d2db38d565f852537211c80153f56a251b84f3a
Date: Mon, 12 Sep 2011 00:02:03 +0000 (UTC)
Precedence: bulk
List-Post: <mailto:gentoo-commits@lists.gentoo.org>
List-Help: <mailto:gentoo-commits+help@lists.gentoo.org>
List-Unsubscribe: <mailto:gentoo-commits+unsubscribe@lists.gentoo.org>
List-Subscribe: <mailto:gentoo-commits+subscribe@lists.gentoo.org>
List-Id: Gentoo Linux mail <gentoo-commits.gentoo.org>
X-BeenThere: gentoo-commits@lists.gentoo.org
Content-Transfer-Encoding: quoted-printable
X-Archives-Salt: 
X-Archives-Hash: 1d30ef884d640823bfc3cec8df0298d2

commit:     8d2db38d565f852537211c80153f56a251b84f3a
Author:     Zac Medico <zmedico <AT> gentoo <DOT> org>
AuthorDate: Mon Sep 12 00:01:50 2011 +0000
Commit:     Zac Medico <zmedico <AT> gentoo <DOT> org>
CommitDate: Mon Sep 12 00:01:50 2011 +0000
URL:        http://git.overlays.gentoo.org/gitweb/?p=3Dproj/portage.git;a=
=3Dcommit;h=3D8d2db38d

Move preprocess_ebuild_env to phase-functions.sh.

---
 bin/ebuild.sh          |  188 ------------------------------------------=
------
 bin/phase-functions.sh |  184 ++++++++++++++++++++++++++++++++++++++++++=
++++
 2 files changed, 184 insertions(+), 188 deletions(-)

diff --git a/bin/ebuild.sh b/bin/ebuild.sh
index a781c2e..d722ccc 100755
--- a/bin/ebuild.sh
+++ b/bin/ebuild.sh
@@ -371,201 +371,13 @@ source_all_bashrcs() {
 	[ ! -z "${OCXX}" ] && export CXX=3D"${OCXX}"
 }
=20
-# 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.
-
-PORTAGE_READONLY_METADATA=3D"DEFINED_PHASES DEPEND DESCRIPTION
-	EAPI HOMEPAGE INHERITED IUSE REQUIRED_USE KEYWORDS LICENSE
-	PDEPEND PROVIDE RDEPEND RESTRICT SLOT SRC_URI"
-
-PORTAGE_READONLY_VARS=3D"D EBUILD EBUILD_PHASE \
-	EBUILD_SH_ARGS ECLASSDIR EMERGE_FROM FILESDIR MERGE_TYPE \
-	PM_EBUILD_HOOK_DIR \
-	PORTAGE_ACTUAL_DISTDIR PORTAGE_ARCHLIST PORTAGE_BASHRC  \
-	PORTAGE_BINPKG_FILE PORTAGE_BINPKG_TAR_OPTS PORTAGE_BINPKG_TMPFILE \
-	PORTAGE_BIN_PATH PORTAGE_BUILDDIR PORTAGE_BUNZIP2_COMMAND \
-	PORTAGE_BZIP2_COMMAND PORTAGE_COLORMAP PORTAGE_CONFIGROOT \
-	PORTAGE_DEBUG PORTAGE_DEPCACHEDIR PORTAGE_EBUILD_EXIT_FILE \
-	PORTAGE_GID PORTAGE_GRPNAME PORTAGE_INST_GID PORTAGE_INST_UID \
-	PORTAGE_IPC_DAEMON PORTAGE_IUSE PORTAGE_LOG_FILE \
-	PORTAGE_MUTABLE_FILTERED_VARS PORTAGE_PYM_PATH PORTAGE_PYTHON \
-	PORTAGE_READONLY_METADATA PORTAGE_READONLY_VARS \
-	PORTAGE_REPO_NAME PORTAGE_RESTRICT PORTAGE_SANDBOX_COMPAT_LEVEL \
-	PORTAGE_SAVED_READONLY_VARS PORTAGE_SIGPIPE_STATUS \
-	PORTAGE_TMPDIR PORTAGE_UPDATE_ENV PORTAGE_USERNAME \
-	PORTAGE_VERBOSE PORTAGE_WORKDIR_MODE PORTDIR PORTDIR_OVERLAY \
-	PROFILE_PATHS REPLACING_VERSIONS REPLACED_BY_VERSION T WORKDIR"
-
-PORTAGE_SAVED_READONLY_VARS=3D"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=3D"AA HOSTNAME"
-
-# @FUNCTION: filter_readonly_variables
-# @DESCRIPTION: [--filter-sandbox] [--allow-extra-vars]
-# Read an environment from stdin and echo to stdout while filtering vari=
ables
-# 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.
-#
-# --filter-locale causes locale related variables such as LANG and LC_*
-# variables to be filtered. These variables should persist between phase=
s,
-# in case they are modified by the ebuild. However, the current user
-# settings should be used when loading the environment from a binary or
-# installed package.
-#
-# --filter-path causes the PATH variable to be filtered. This variable
-# should persist between phases, in case it is modified by the ebuild.
-# However, old settings should be overridden when loading the
-# environment from a binary or installed package.
-#
-# ---allow-extra-vars causes some extra vars to be allowd through, such
-# as ${PORTAGE_SAVED_READONLY_VARS} and ${PORTAGE_MUTABLE_FILTERED_VARS}=
.
-#
-# In bash-3.2_p20+ an attempt to assign BASH_*, FUNCNAME, GROUPS or any
-# readonly variable cause the shell to exit while executing the "source"
-# builtin command. To avoid this problem, this function filters those
-# variables out and discards them. See bug #190128.
-filter_readonly_variables() {
-	local x filtered_vars
-	local readonly_bash_vars=3D"BASHOPTS BASHPID DIRSTACK EUID
-		FUNCNAME GROUPS PIPESTATUS PPID SHELLOPTS UID"
-	local bash_misc_vars=3D"BASH BASH_.* COMP_WORDBREAKS HISTCMD
-		HISTFILE HOSTNAME HOSTTYPE IFS LINENO MACHTYPE OLDPWD
-		OPTERR OPTIND OSTYPE POSIXLY_CORRECT PS4 PWD RANDOM
-		SECONDS SHELL SHLVL"
-	local filtered_sandbox_vars=3D"SANDBOX_ACTIVE SANDBOX_BASHRC
-		SANDBOX_DEBUG_LOG SANDBOX_DISABLED SANDBOX_LIB
-		SANDBOX_LOG SANDBOX_ON"
-	local misc_garbage_vars=3D"_portage_filter_opts"
-	filtered_vars=3D"$readonly_bash_vars $bash_misc_vars
-		$PORTAGE_READONLY_VARS $misc_garbage_vars"
-
-	# Don't filter/interfere with prefix variables unless they are
-	# supported by the current EAPI.
-	case "${EAPI:-0}" in
-		0|1|2)
-			;;
-		*)
-			filtered_vars+=3D" ED EPREFIX EROOT"
-			;;
-	esac
-
-	if has --filter-sandbox $* ; then
-		filtered_vars=3D"${filtered_vars} SANDBOX_.*"
-	else
-		filtered_vars=3D"${filtered_vars} ${filtered_sandbox_vars}"
-	fi
-	if has --filter-features $* ; then
-		filtered_vars=3D"${filtered_vars} FEATURES PORTAGE_FEATURES"
-	fi
-	if has --filter-path $* ; then
-		filtered_vars+=3D" PATH"
-	fi
-	if has --filter-locale $* ; then
-		filtered_vars+=3D" LANG LC_ALL LC_COLLATE
-			LC_CTYPE LC_MESSAGES LC_MONETARY
-			LC_NUMERIC LC_PAPER LC_TIME"
-	fi
-	if ! has --allow-extra-vars $* ; then
-		filtered_vars=3D"
-			${filtered_vars}
-			${PORTAGE_SAVED_READONLY_VARS}
-			${PORTAGE_MUTABLE_FILTERED_VARS}
-		"
-	fi
-
-	"${PORTAGE_PYTHON:-/usr/bin/python}" "${PORTAGE_BIN_PATH}"/filter-bash-=
environment.py "${filtered_vars}" || die "filter-bash-environment.py fail=
ed"
-}
-
-# @FUNCTION: preprocess_ebuild_env
-# @DESCRIPTION:
-# Filter any readonly variables from ${T}/environment, source it, and th=
en
-# save it via save_ebuild_env(). This process should be sufficient to pr=
event
-# any stale variables or functions from an arbitrary environment from
-# interfering with the current environment. This is useful when an exist=
ing
-# environment needs to be loaded from a binary or installed package.
-preprocess_ebuild_env() {
-	local _portage_filter_opts=3D"--filter-features --filter-locale --filte=
r-path --filter-sandbox"
-
-	# If environment.raw is present, this is a signal from the python side,
-	# indicating that the environment may contain stale FEATURES and
-	# SANDBOX_{DENY,PREDICT,READ,WRITE} variables that should be filtered o=
ut.
-	# Otherwise, we don't need to filter the environment.
-	[ -f "${T}/environment.raw" ] || return 0
-
-	filter_readonly_variables $_portage_filter_opts < "${T}"/environment \
-		>> "$T/environment.filtered" || return $?
-	unset _portage_filter_opts
-	mv "${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=3D1
-		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=3D0
-
-		# 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 $?
-		>> "$T/environment.success" || exit $?
-	) > "${T}/environment.filtered"
-	local retval
-	if [ -e "${T}/environment.success" ] ; then
-		filter_readonly_variables --filter-features < \
-			"${T}/environment.filtered" > "${T}/environment"
-		retval=3D$?
-	else
-		retval=3D1
-	fi
-	rm -f "${T}"/environment.{filtered,raw,success}
-	return ${retval}
-}
-
 # =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =
=3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=
=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D
 # =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D functions end, main =
part begins =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D
-# =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D functions end, main =
part begins =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D
-# =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D functions end, main =
part begins =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D
 # =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =
=3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D =3D=
=3D=3D =3D=3D=3D =3D=3D=3D =3D=3D=3D
=20
 export SANDBOX_ON=3D"1"
 export S=3D${WORKDIR}/${P}
=20
-unset E_IUSE E_REQUIRED_USE E_DEPEND E_RDEPEND E_PDEPEND
-
 # Turn of extended glob matching so that g++ doesn't get incorrectly mat=
ched.
 shopt -u extglob
=20

diff --git a/bin/phase-functions.sh b/bin/phase-functions.sh
index 383253d..f1db257 100644
--- a/bin/phase-functions.sh
+++ b/bin/phase-functions.sh
@@ -2,6 +2,190 @@
 # Copyright 1999-2011 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
=20
+# 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.
+
+PORTAGE_READONLY_METADATA=3D"DEFINED_PHASES DEPEND DESCRIPTION
+	EAPI HOMEPAGE INHERITED IUSE REQUIRED_USE KEYWORDS LICENSE
+	PDEPEND PROVIDE RDEPEND RESTRICT SLOT SRC_URI"
+
+PORTAGE_READONLY_VARS=3D"D EBUILD EBUILD_PHASE \
+	EBUILD_SH_ARGS ECLASSDIR EMERGE_FROM FILESDIR MERGE_TYPE \
+	PM_EBUILD_HOOK_DIR \
+	PORTAGE_ACTUAL_DISTDIR PORTAGE_ARCHLIST PORTAGE_BASHRC  \
+	PORTAGE_BINPKG_FILE PORTAGE_BINPKG_TAR_OPTS PORTAGE_BINPKG_TMPFILE \
+	PORTAGE_BIN_PATH PORTAGE_BUILDDIR PORTAGE_BUNZIP2_COMMAND \
+	PORTAGE_BZIP2_COMMAND PORTAGE_COLORMAP PORTAGE_CONFIGROOT \
+	PORTAGE_DEBUG PORTAGE_DEPCACHEDIR PORTAGE_EBUILD_EXIT_FILE \
+	PORTAGE_GID PORTAGE_GRPNAME PORTAGE_INST_GID PORTAGE_INST_UID \
+	PORTAGE_IPC_DAEMON PORTAGE_IUSE PORTAGE_LOG_FILE \
+	PORTAGE_MUTABLE_FILTERED_VARS PORTAGE_PYM_PATH PORTAGE_PYTHON \
+	PORTAGE_READONLY_METADATA PORTAGE_READONLY_VARS \
+	PORTAGE_REPO_NAME PORTAGE_RESTRICT PORTAGE_SANDBOX_COMPAT_LEVEL \
+	PORTAGE_SAVED_READONLY_VARS PORTAGE_SIGPIPE_STATUS \
+	PORTAGE_TMPDIR PORTAGE_UPDATE_ENV PORTAGE_USERNAME \
+	PORTAGE_VERBOSE PORTAGE_WORKDIR_MODE PORTDIR PORTDIR_OVERLAY \
+	PROFILE_PATHS REPLACING_VERSIONS REPLACED_BY_VERSION T WORKDIR"
+
+PORTAGE_SAVED_READONLY_VARS=3D"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=3D"AA HOSTNAME"
+
+# @FUNCTION: filter_readonly_variables
+# @DESCRIPTION: [--filter-sandbox] [--allow-extra-vars]
+# Read an environment from stdin and echo to stdout while filtering vari=
ables
+# 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.
+#
+# --filter-locale causes locale related variables such as LANG and LC_*
+# variables to be filtered. These variables should persist between phase=
s,
+# in case they are modified by the ebuild. However, the current user
+# settings should be used when loading the environment from a binary or
+# installed package.
+#
+# --filter-path causes the PATH variable to be filtered. This variable
+# should persist between phases, in case it is modified by the ebuild.
+# However, old settings should be overridden when loading the
+# environment from a binary or installed package.
+#
+# ---allow-extra-vars causes some extra vars to be allowd through, such
+# as ${PORTAGE_SAVED_READONLY_VARS} and ${PORTAGE_MUTABLE_FILTERED_VARS}=
.
+#
+# In bash-3.2_p20+ an attempt to assign BASH_*, FUNCNAME, GROUPS or any
+# readonly variable cause the shell to exit while executing the "source"
+# builtin command. To avoid this problem, this function filters those
+# variables out and discards them. See bug #190128.
+filter_readonly_variables() {
+	local x filtered_vars
+	local readonly_bash_vars=3D"BASHOPTS BASHPID DIRSTACK EUID
+		FUNCNAME GROUPS PIPESTATUS PPID SHELLOPTS UID"
+	local bash_misc_vars=3D"BASH BASH_.* COMP_WORDBREAKS HISTCMD
+		HISTFILE HOSTNAME HOSTTYPE IFS LINENO MACHTYPE OLDPWD
+		OPTERR OPTIND OSTYPE POSIXLY_CORRECT PS4 PWD RANDOM
+		SECONDS SHELL SHLVL"
+	local filtered_sandbox_vars=3D"SANDBOX_ACTIVE SANDBOX_BASHRC
+		SANDBOX_DEBUG_LOG SANDBOX_DISABLED SANDBOX_LIB
+		SANDBOX_LOG SANDBOX_ON"
+	local misc_garbage_vars=3D"_portage_filter_opts"
+	filtered_vars=3D"$readonly_bash_vars $bash_misc_vars
+		$PORTAGE_READONLY_VARS $misc_garbage_vars"
+
+	# Don't filter/interfere with prefix variables unless they are
+	# supported by the current EAPI.
+	case "${EAPI:-0}" in
+		0|1|2)
+			;;
+		*)
+			filtered_vars+=3D" ED EPREFIX EROOT"
+			;;
+	esac
+
+	if has --filter-sandbox $* ; then
+		filtered_vars=3D"${filtered_vars} SANDBOX_.*"
+	else
+		filtered_vars=3D"${filtered_vars} ${filtered_sandbox_vars}"
+	fi
+	if has --filter-features $* ; then
+		filtered_vars=3D"${filtered_vars} FEATURES PORTAGE_FEATURES"
+	fi
+	if has --filter-path $* ; then
+		filtered_vars+=3D" PATH"
+	fi
+	if has --filter-locale $* ; then
+		filtered_vars+=3D" LANG LC_ALL LC_COLLATE
+			LC_CTYPE LC_MESSAGES LC_MONETARY
+			LC_NUMERIC LC_PAPER LC_TIME"
+	fi
+	if ! has --allow-extra-vars $* ; then
+		filtered_vars=3D"
+			${filtered_vars}
+			${PORTAGE_SAVED_READONLY_VARS}
+			${PORTAGE_MUTABLE_FILTERED_VARS}
+		"
+	fi
+
+	"${PORTAGE_PYTHON:-/usr/bin/python}" "${PORTAGE_BIN_PATH}"/filter-bash-=
environment.py "${filtered_vars}" || die "filter-bash-environment.py fail=
ed"
+}
+
+# @FUNCTION: preprocess_ebuild_env
+# @DESCRIPTION:
+# Filter any readonly variables from ${T}/environment, source it, and th=
en
+# save it via save_ebuild_env(). This process should be sufficient to pr=
event
+# any stale variables or functions from an arbitrary environment from
+# interfering with the current environment. This is useful when an exist=
ing
+# environment needs to be loaded from a binary or installed package.
+preprocess_ebuild_env() {
+	local _portage_filter_opts=3D"--filter-features --filter-locale --filte=
r-path --filter-sandbox"
+
+	# If environment.raw is present, this is a signal from the python side,
+	# indicating that the environment may contain stale FEATURES and
+	# SANDBOX_{DENY,PREDICT,READ,WRITE} variables that should be filtered o=
ut.
+	# Otherwise, we don't need to filter the environment.
+	[ -f "${T}/environment.raw" ] || return 0
+
+	filter_readonly_variables $_portage_filter_opts < "${T}"/environment \
+		>> "$T/environment.filtered" || return $?
+	unset _portage_filter_opts
+	mv "${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=3D1
+		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=3D0
+
+		# 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 $?
+		>> "$T/environment.success" || exit $?
+	) > "${T}/environment.filtered"
+	local retval
+	if [ -e "${T}/environment.success" ] ; then
+		filter_readonly_variables --filter-features < \
+			"${T}/environment.filtered" > "${T}/environment"
+		retval=3D$?
+	else
+		retval=3D1
+	fi
+	rm -f "${T}"/environment.{filtered,raw,success}
+	return ${retval}
+}
+
 ebuild_phase() {
 	declare -F "$1" >/dev/null && qa_call $1
 }