summaryrefslogtreecommitdiffstats
path: root/bin/ebuild.sh
blob: b4deb9c99e52afdf78e4901f68f047f7ada5fda0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
#!/bin/bash
# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

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

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

source "${PORTAGE_BIN_PATH}/isolated-functions.sh" || exit 1

if [[ $EBUILD_PHASE != depend ]] ; then
	source "${PORTAGE_BIN_PATH}/phase-functions.sh" || die
	source "${PORTAGE_BIN_PATH}/save-ebuild-env.sh" || die
	source "${PORTAGE_BIN_PATH}/phase-helpers.sh" || die
	source "${PORTAGE_BIN_PATH}/bashrc-functions.sh" || die
else
	# These dummy functions are for things that are likely to be called
	# in global scope, even though they are completely useless during
	# the "depend" phase.
	for x in diropts docompress exeopts get_KV insopts \
		keepdir KV_major KV_micro KV_minor KV_to_int \
		libopts register_die_hook register_success_hook \
		__strip_duplicate_slashes \
		use_with use_enable ; do
		eval "${x}() {
			if ___eapi_disallows_helpers_in_global_scope; then
				die \"\${FUNCNAME}() calls are not allowed in global scope\"
			fi
		}"
	done
	# These dummy functions return false in non-strict EAPIs, in order to ensure that
	# `use multislot` is false for the "depend" phase.
	funcs="use useq usev"
	if ___eapi_has_usex; then
		funcs+=" usex"
	fi
	for x in ${funcs} ; do
		eval "${x}() {
			if ___eapi_disallows_helpers_in_global_scope; then
				die \"\${FUNCNAME}() calls are not allowed in global scope\"
			else
				return 1
			fi
		}"
	done
	# These functions die because calls to them during the "depend" phase
	# are considered to be severe QA violations.
	for x in best_version has_version portageq ; do
		eval "${x}() { die \"\${FUNCNAME}() calls are not allowed in global scope\"; }"
	done
	unset funcs x
fi

# 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

# This is just a temporary workaround for portage-9999 users since
# earlier portage versions do not detect a version change in this case
# (9999 to 9999) and therefore they try execute an incompatible version of
# ebuild.sh during the upgrade.
export PORTAGE_BZIP2_COMMAND=${PORTAGE_BZIP2_COMMAND:-bzip2} 

# 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.

__qa_source() {
	local shopts=$(shopt) OLDIFS="$IFS"
	local retval
	source "$@"
	retval=$?
	set +e
	[[ $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
	"$@"
	retval=$?
	set +e
	[[ $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
}

EBUILD_SH_ARGS="$*"

shift $#

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

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

# sandbox support functions; defined prior to profile.bashrc srcing, since the profile might need to add a default exception (/usr/lib64/conftest fex)
__sb_append_var() {
	local _v=$1 ; shift
	local var="SANDBOX_${_v}"
	[[ -z $1 || -n $2 ]] && die "Usage: add$(echo ${_v} | \
		LC_ALL=C tr [:upper:] [:lower:]) <colon-delimited list of paths>"
	export ${var}="${!var:+${!var}:}$1"
}
# bash-4 version:
# local var="SANDBOX_${1^^}"
# addread() { __sb_append_var ${0#add} "$@" ; }
addread()    { __sb_append_var READ    "$@" ; }
addwrite()   { __sb_append_var WRITE   "$@" ; }
adddeny()    { __sb_append_var DENY    "$@" ; }
addpredict() { __sb_append_var PREDICT "$@" ; }

addwrite "${PORTAGE_TMPDIR}"
addread "/:${PORTAGE_TMPDIR}"
[[ -n ${PORTAGE_GPG_DIR} ]] && addpredict "${PORTAGE_GPG_DIR}"

# Avoid sandbox violations in temporary directories.
if [[ -w $T ]] ; then
	export TEMP=$T
	export TMP=$T
	export TMPDIR=$T
elif [[ $SANDBOX_ON = 1 ]] ; then
	for x in TEMP TMP TMPDIR ; do
		[[ -n ${!x} ]] && addwrite "${!x}"
	done
	unset x
fi

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

# Ensure that $PWD is sane whenever possible, to protect against
# exploitation of insecure search path for python -c in ebuilds.
# See bug #239560.
if ! has "$EBUILD_PHASE" clean cleanrm 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

# 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
	[[ $EBUILD_PHASE = depend || ! -d ${T} || ${#} -eq 0 ]] && return 0

	if [[ ${ECLASS_DEBUG_OUTPUT} == on ]]; then
		printf 'debug: %s\n' "${@}" >&2
	elif [[ -n ${ECLASS_DEBUG_OUTPUT} ]]; then
		printf 'debug: %s\n' "${@}" >> "${ECLASS_DEBUG_OUTPUT}"
	fi

	if [[ -w $T ]] ; then
		# default target
		printf '%s\n' "${@}" >> "${T}/eclass-debug.log"
		# let the portage user own/write to this file
		chgrp portage "${T}/eclass-debug.log" &>/dev/null
		chmod g+w "${T}/eclass-debug.log" &>/dev/null
	fi
}

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

debug-print-function() {
	debug-print "${1}: entering function, parameters: ${*:2}"
}

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

	if [[ -n $ECLASS && -n ${!__export_funcs_var} ]] ; then
		echo "QA Notice: EXPORT_FUNCTIONS is called before inherit in" \
			"$ECLASS.eclass. For compatibility with <=portage-2.1.6.7," \
			"only call EXPORT_FUNCTIONS after inherit(s)." \
			| fmt -w 75 | while read -r ; do eqawarn "$REPLY" ; done
	fi

	local location
	local olocation
	local x

	# These variables must be restored before returning.
	local PECLASS=$ECLASS
	local prev_export_funcs_var=$__export_funcs_var

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

		export ECLASS="$1"
		__export_funcs_var=__export_functions_$ECLASS_DEPTH
		unset $__export_funcs_var

		if [ "${EBUILD_PHASE}" != "depend" ] && \
			[ "${EBUILD_PHASE}" != "nofetch" ] && \
			[[ ${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. It's
			# disabled for nofetch, since that can be called by repoman and
			# that triggers bug #407449 due to repoman not exporting
			# non-essential variables such as INHERITED.
			if ! has $ECLASS $INHERITED $__INHERITED_QA_CACHE ; then
				eqawarn "QA Notice: ECLASS '$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}" ] && \
			! has "${location}" ${EBUILD_OVERLAY_ECLASSES} ; then
				EBUILD_OVERLAY_ECLASSES="${EBUILD_OVERLAY_ECLASSES} ${location}"
		fi

		#We need to back up the values of *DEPEND to B_*DEPEND
		#(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_REQUIRED_USE B_DEPEND B_RDEPEND B_PDEPEND B_HDEPEND
		[ "${IUSE+set}"       = set ] && B_IUSE="${IUSE}"
		[ "${REQUIRED_USE+set}" = set ] && B_REQUIRED_USE="${REQUIRED_USE}"
		[ "${DEPEND+set}"     = set ] && B_DEPEND="${DEPEND}"
		[ "${RDEPEND+set}"    = set ] && B_RDEPEND="${RDEPEND}"
		[ "${PDEPEND+set}"    = set ] && B_PDEPEND="${PDEPEND}"
		[ "${HDEPEND+set}"    = set ] && B_HDEPEND="${HDEPEND}"
		unset IUSE REQUIRED_USE DEPEND RDEPEND PDEPEND HDEPEND
		#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.
		[ "${IUSE+set}"         = set ] && E_IUSE+="${E_IUSE:+ }${IUSE}"
		[ "${REQUIRED_USE+set}" = set ] && E_REQUIRED_USE+="${E_REQUIRED_USE:+ }${REQUIRED_USE}"
		[ "${DEPEND+set}"       = set ] && E_DEPEND+="${E_DEPEND:+ }${DEPEND}"
		[ "${RDEPEND+set}"      = set ] && E_RDEPEND+="${E_RDEPEND:+ }${RDEPEND}"
		[ "${PDEPEND+set}"      = set ] && E_PDEPEND+="${E_PDEPEND:+ }${PDEPEND}"
		[ "${HDEPEND+set}"      = set ] && E_HDEPEND+="${E_HDEPEND:+ }${HDEPEND}"

		[ "${B_IUSE+set}"     = set ] && IUSE="${B_IUSE}"
		[ "${B_IUSE+set}"     = set ] || unset IUSE
		
		[ "${B_REQUIRED_USE+set}"     = set ] && REQUIRED_USE="${B_REQUIRED_USE}"
		[ "${B_REQUIRED_USE+set}"     = set ] || unset REQUIRED_USE

		[ "${B_DEPEND+set}"   = set ] && DEPEND="${B_DEPEND}"
		[ "${B_DEPEND+set}"   = set ] || unset DEPEND

		[ "${B_RDEPEND+set}"  = set ] && RDEPEND="${B_RDEPEND}"
		[ "${B_RDEPEND+set}"  = set ] || unset RDEPEND

		[ "${B_PDEPEND+set}"  = set ] && PDEPEND="${B_PDEPEND}"
		[ "${B_PDEPEND+set}"  = set ] || unset PDEPEND

		[ "${B_HDEPEND+set}"  = set ] && HDEPEND="${B_HDEPEND}"
		[ "${B_HDEPEND+set}"  = set ] || unset HDEPEND

		#turn on glob expansion
		set +f

		if [[ -n ${!__export_funcs_var} ]] ; then
			for x in ${!__export_funcs_var} ; do
				debug-print "EXPORT_FUNCTIONS: $x -> ${ECLASS}_$x"
				declare -F "${ECLASS}_$x" >/dev/null || \
					die "EXPORT_FUNCTIONS: ${ECLASS}_$x is not defined"
				eval "$x() { ${ECLASS}_$x \"\$@\" ; }" > /dev/null
			done
		fi
		unset $__export_funcs_var

		has $1 $INHERITED || export INHERITED="$INHERITED $1"

		shift
	done
	((--ECLASS_DEPTH)) # Returns 1 when ECLASS_DEPTH reaches 0.
	if (( ECLASS_DEPTH > 0 )) ; then
		export ECLASS=$PECLASS
		__export_funcs_var=$prev_export_funcs_var
	else
		unset ECLASS __export_funcs_var
	fi
	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
		die "EXPORT_FUNCTIONS without a defined ECLASS"
	fi
	eval $__export_funcs_var+=\" $*\"
}

PORTAGE_BASHRCS_SOURCED=0

# @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() {
	[[ $PORTAGE_BASHRCS_SOURCED = 1 ]] && return 0
	PORTAGE_BASHRCS_SOURCED=1
	local x

	local OCC="${CC}" OCXX="${CXX}"

	if [[ $EBUILD_PHASE != depend ]] ; then
		# source the existing profile.bashrcs.
		save_IFS
		IFS=$'\n'
		local path_array=($PROFILE_PATHS)
		restore_IFS
		for x in "${path_array[@]}" ; do
			[ -f "$x/profile.bashrc" ] && __qa_source "$x/profile.bashrc"
		done
	fi

	if [ -r "${PORTAGE_BASHRC}" ] ; then
		if [ "$PORTAGE_DEBUG" != "1" ] || [ "${-/x/}" != "$-" ]; then
			source "${PORTAGE_BASHRC}"
		else
			set -x
			source "${PORTAGE_BASHRC}"
			set +x
		fi
	fi

	if [[ $EBUILD_PHASE != depend ]] ; then
		# The user's bashrc is the ONLY non-portage bit of code that can
		# change shopts without a QA violation.
		for x in "${PM_EBUILD_HOOK_DIR}"/${CATEGORY}/{${PN},${PN}:${SLOT},${P},${PF}}; do
			if [ -r "${x}" ]; then
				# If $- contains x, then tracing has already been enabled
				# elsewhere for some reason. We preserve it's state so as
				# not to interfere.
				if [ "$PORTAGE_DEBUG" != "1" ] || [ "${-/x/}" != "$-" ]; then
					source "${x}"
				else
					set -x
					source "${x}"
					set +x
				fi
			fi
		done
	fi

	[ ! -z "${OCC}" ] && export CC="${OCC}"
	[ ! -z "${OCXX}" ] && export CXX="${OCXX}"
}

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

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

# 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 equery 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 has ${BIN} autoconf automake aclocal libtoolize ; then
			FUNC_SRC="${BIN}() {
				if ! has \${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

# Subshell/helper die support (must export for the die helper).
export EBUILD_MASTER_PID=$BASHPID
trap 'exit 1' SIGTERM

if ! has "$EBUILD_PHASE" clean cleanrm depend && \
	[ -f "${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.
	# NOTE: export ${FOO}=... requires quoting, unlike normal exports
	__preprocess_ebuild_env || \
		die "error processing environment"
	# Colon separated SANDBOX_* variables need to be cumulative.
	for x in SANDBOX_DENY SANDBOX_READ SANDBOX_PREDICT SANDBOX_WRITE ; do
		export PORTAGE_${x}="${!x}"
	done
	PORTAGE_SANDBOX_ON=${SANDBOX_ON}
	export SANDBOX_ON=1
	source "${T}"/environment || \
		die "error sourcing environment"
	# We have to temporarily disable sandbox since the
	# SANDBOX_{DENY,READ,PREDICT,WRITE} values we've just loaded
	# may be unusable (triggering in spurious sandbox violations)
	# until we've merged them with our current values.
	export SANDBOX_ON=0
	for x in SANDBOX_DENY SANDBOX_PREDICT SANDBOX_READ SANDBOX_WRITE ; do
		y="PORTAGE_${x}"
		if [ -z "${!x}" ] ; then
			export ${x}="${!y}"
		elif [ -n "${!y}" ] && [ "${!y}" != "${!x}" ] ; then
			# filter out dupes
			export ${x}="$(printf "${!y}:${!x}" | tr ":" "\0" | \
				sort -z -u | tr "\0" ":")"
		fi
		export ${x}="${!x%:}"
		unset PORTAGE_${x}
	done
	unset x y
	export SANDBOX_ON=${PORTAGE_SANDBOX_ON}
	unset PORTAGE_SANDBOX_ON
	[[ -n $EAPI ]] || EAPI=0
fi

if ___eapi_enables_globstar; then
	shopt -s globstar
fi

if ! has "$EBUILD_PHASE" clean cleanrm ; then
	if [[ $EBUILD_PHASE = depend || ! -f $T/environment || \
		-f $PORTAGE_BUILDDIR/.ebuild_changed ]] || \
		has 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

		# When EBUILD_PHASE != depend, INHERITED comes pre-initialized
		# from cache. In order to make INHERITED content independent of
		# EBUILD_PHASE during inherit() calls, we unset INHERITED after
		# we make a backup copy for QA checks.
		__INHERITED_QA_CACHE=$INHERITED

		# *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 EAPI DEPEND RDEPEND PDEPEND HDEPEND INHERITED IUSE REQUIRED_USE \
			ECLASS E_IUSE E_REQUIRED_USE E_DEPEND E_RDEPEND E_PDEPEND \
			E_HDEPEND

		if [[ $PORTAGE_DEBUG != 1 || ${-/x/} != $- ]] ; then
			source "$EBUILD" || die "error sourcing ebuild"
		else
			set -x
			source "$EBUILD" || die "error sourcing ebuild"
			set +x
		fi

		if [[ "${EBUILD_PHASE}" != "depend" ]] ; then
			RESTRICT=${PORTAGE_RESTRICT}
			[[ -e $PORTAGE_BUILDDIR/.ebuild_changed ]] && \
			rm "$PORTAGE_BUILDDIR/.ebuild_changed"
		fi

		[ "${EAPI+set}" = set ] || EAPI=0

		# export EAPI for helpers (especially since we unset it above)
		export EAPI

		if ___eapi_has_RDEPEND_DEPEND_fallback; then
			export RDEPEND=${RDEPEND-${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}"
		HDEPEND+="${HDEPEND:+ }${E_HDEPEND}"
		REQUIRED_USE+="${REQUIRED_USE:+ }${E_REQUIRED_USE}"
		
		unset ECLASS E_IUSE E_REQUIRED_USE E_DEPEND E_RDEPEND E_PDEPEND E_HDEPEND \
			__INHERITED_QA_CACHE

		# alphabetically ordered by $EBUILD_PHASE value
		case ${EAPI} in
			0|1)
				_valid_phases="src_compile pkg_config pkg_info src_install
					pkg_nofetch pkg_postinst pkg_postrm pkg_preinst pkg_prerm
					pkg_setup src_test src_unpack"
				;;
			2|3)
				_valid_phases="src_compile pkg_config src_configure pkg_info
					src_install pkg_nofetch pkg_postinst pkg_postrm pkg_preinst
					src_prepare pkg_prerm pkg_setup src_test src_unpack"
				;;
			*)
				_valid_phases="src_compile pkg_config src_configure pkg_info
					src_install pkg_nofetch pkg_postinst pkg_postrm pkg_preinst
					src_prepare pkg_prerm pkg_pretend pkg_setup src_test src_unpack"
				;;
		esac

		DEFINED_PHASES=
		for _f in $_valid_phases ; do
			if declare -F $_f >/dev/null ; then
				_f=${_f#pkg_}
				DEFINED_PHASES+=" ${_f#src_}"
			fi
		done
		[[ -n $DEFINED_PHASES ]] || DEFINED_PHASES=-

		unset _f _valid_phases

		if [[ $EBUILD_PHASE != depend ]] ; then

			if has distcc $FEATURES ; then
				[[ -n $DISTCC_LOG ]] && addwrite "${DISTCC_LOG%/*}"
			fi

			if has ccache $FEATURES ; then

				if [[ -n $CCACHE_DIR ]] ; then
					addread "$CCACHE_DIR"
					addwrite "$CCACHE_DIR"
				fi

				[[ -n $CCACHE_SIZE ]] && ccache -M $CCACHE_SIZE &> /dev/null
			fi

			if [[ -n $QA_PREBUILT ]] ; then

				# these ones support fnmatch patterns
				QA_EXECSTACK+=" $QA_PREBUILT"
				QA_TEXTRELS+=" $QA_PREBUILT"
				QA_WX_LOAD+=" $QA_PREBUILT"

				# these ones support regular expressions, so translate
				# fnmatch patterns to regular expressions
				for x in QA_DT_NEEDED QA_FLAGS_IGNORED QA_PRESTRIPPED QA_SONAME ; do
					if [[ $(declare -p $x 2>/dev/null) = declare\ -a* ]] ; then
						eval "$x=(\"\${$x[@]}\" ${QA_PREBUILT//\*/.*})"
					else
						eval "$x+=\" ${QA_PREBUILT//\*/.*}\""
					fi
				done

				unset x
			fi

			# This needs to be exported since prepstrip is a separate shell script.
			[[ -n $QA_PRESTRIPPED ]] && export QA_PRESTRIPPED
			eval "[[ -n \$QA_PRESTRIPPED_${ARCH/-/_} ]] && \
				export QA_PRESTRIPPED_${ARCH/-/_}"
		fi
	fi
fi

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

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

if [[ $EBUILD_PHASE = depend ]] ; then
	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 REQUIRED_USE PDEPEND PROVIDE EAPI
		PROPERTIES DEFINED_PHASES HDEPEND UNUSED_04
		UNUSED_03 UNUSED_02 UNUSED_01"

	if ! ___eapi_has_HDEPEND; then
		unset HDEPEND
	fi

	# The extra $(echo) commands remove newlines.
	if [ -n "${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
		exec 9>&-
	fi
	set +f
else
	# Note: readonly variables interfere with __preprocess_ebuild_env(), so
	# declare them only after it has already run.
	declare -r $PORTAGE_READONLY_METADATA $PORTAGE_READONLY_VARS
	if ___eapi_has_prefix_variables; then
		declare -r ED EPREFIX EROOT
	fi

	if [[ -n $EBUILD_SH_ARGS ]] ; then
		(
			# Don't allow subprocesses to inherit the pipe which
			# emerge uses to monitor ebuild.sh.
			exec 9>&-
			__ebuild_main ${EBUILD_SH_ARGS}
			exit 0
		)
		exit $?
	fi
fi

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