Send patches - preferably formatted by git format-patch - to patches at archlinux32 dot org.
summaryrefslogtreecommitdiff
path: root/makechrootpkg.in
blob: 5c2086e7383ef969c456648ba9af450b887fce3f (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
#!/bin/bash
# License: GNU GPLv2
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

m4_include(lib/common.sh)

shopt -s nullglob

init_variables() {
	default_makepkg_args=(-s --noconfirm -L --holdver)
	makepkg_args=("${default_makepkg_args[@]}")
	repack=false
	update_first=false
	clean_first=false
	install_pkg=
	run_namcap=false
	temp_chroot=false
	chrootdir=
	passeddir=
	declare -a install_pkgs
	declare -i ret=0

	bindmounts_ro=()
	bindmounts_rw=()

	copy=$USER
	[[ -n ${SUDO_USER:-} ]] && copy=$SUDO_USER
	[[ -z "$copy" || $copy = root ]] && copy=copy
	src_owner=${SUDO_USER:-$USER}
}

usage() {
	echo "Usage: ${0##*/} [options] -r <chrootdir> [--] [makepkg args]"
	echo ' Run this script in a PKGBUILD dir to build a package inside a'
	echo ' clean chroot. Arguments passed to this script after the'
	echo ' end-of-options marker (--) will be passed to makepkg.'
	echo ''
	echo ' The chroot dir consists of the following directories:'
	echo ' <chrootdir>/{root, copy} but only "root" is required'
	echo ' by default. The working copy will be created as needed'
	echo ''
	echo 'The chroot "root" directory must be created via the following'
	echo 'command:'
	echo '    mkarchroot <chrootdir>/root base-devel'
	echo ''
	echo "Default makepkg args: ${default_makepkg_args[*]}"
	echo ''
	echo 'Flags:'
	echo '-h         This help'
	echo '-c         Clean the chroot before building'
	echo '-d <dir>   Bind directory into build chroot as read-write'
	echo '-D <dir>   Bind directory into build chroot as read-only'
	echo '-u         Update the working copy of the chroot before building'
	echo '           This is useful for rebuilds without dirtying the pristine'
	echo '           chroot'
	echo '-r <dir>   The chroot dir to use'
	echo '-I <pkg>   Install a package into the working copy of the chroot'
	echo '-l <copy>  The directory to use as the working copy of the chroot'
	echo '           Useful for maintaining multiple copies'
	echo "           Default: $copy"
	echo '-n         Run namcap on the package'
	echo '-T         Build in a temporary directory'
	exit 1
}

# {{{ functions
# Usage: load_vars $makepkg_conf
# Globals:
#  - SRCDEST
#  - SRCPKGDEST
#  - PKGDEST
#  - LOGDEST
#  - MAKEFLAGS
#  - PACKAGER
load_vars() {
	local makepkg_conf="$1" var

	[[ -f $makepkg_conf ]] || return 1

	for var in {SRC,SRCPKG,PKG,LOG}DEST MAKEFLAGS PACKAGER; do
		[[ -z ${!var:-} ]] && eval $(grep "^${var}=" "$makepkg_conf")
	done

	return 0
}

# Usage: btrfs_subvolume_id $SUBVOLUME
btrfs_subvolume_id() (
	set -o pipefail
	LC_ALL=C btrfs subvolume show "$1" | sed -n 's/^\tSubvolume ID:\s*//p'
)

# Usage: btrfs_subvolume_list_all $FILEPATH
#
# Given $FILEPATH somewhere on a mounted btrfs filesystem, print the
# ID and full path of every subvolume on the filesystem, one per line
# in the format "$ID $PATH".
btrfs_subvolume_list_all() (
	set -o pipefail
	local mountpoint
	mountpoint="$(df --output=target "$1" | sed 1d)" || return $?
	LC_ALL=C btrfs subvolume list -a "$mountpoint" | sed -r 's|^ID ([0-9]+) .* path (<FS_TREE>/)?(\S*).*|\1 \3|'
)

# Usage: btrfs_subvolume_list $SUBVOLUME
#
# Assuming that $SUBVOLUME is a btrfs subvolume, list all child
# subvolumes; from most deeply nested to most shallowly nested.
#
# This is intended to be a sane version of `btrfs subvolume list`.
btrfs_subvolume_list() {
	local subvolume=$1

	local id all path subpath
	id="$(btrfs_subvolume_id "$subvolume")" || return $?
	all="$(btrfs_subvolume_list_all "$subvolume")" || return $?
	path="$(sed -n "s/^$id //p" <<<"$all")"
	while read -r id subpath; do
		if [[ "$subpath" = "$path"/* ]]; then
			printf '%s\n' "${subpath#"${path}/"}"
		fi
	done <<<"$all" | LC_ALL=C sort --reverse
}

# Usage: btrfs_subvolume_delete $SUBVOLUME
#
# Assuming that $SUBVOLUME is a btrfs subvolume, delete it and all
# subvolumes below it.
#
# This is intended to be a recursive version of
# `btrfs subvolume delete`.
btrfs_subvolume_delete() {
	local dir="$1"
	local subvolumes subvolume
	subvolumes=($(btrfs_subvolume_list "$dir")) || return $?
	for subvolume in "${subvolumes[@]}"; do
		btrfs subvolume delete "$dir/$subvolume" || return $?
	done
	btrfs subvolume delete "$dir"
}

# Usage: sync_chroot $CHROOTDIR/$CHROOT <$CHROOTCOPY|$copydir>
sync_chroot() {
	local chrootdir=$1
	local copy=$2
	local copydir=''
	if [[ ${copy:0:1} = / ]]; then
		copydir=$copy
	else
		copydir="$chrootdir/$copy"
	fi

	if [[ "$chrootdir/root" -ef "$copydir" ]]; then
		error 'Cannot sync copy with itself: %s' "$copydir"
		return 1
	fi

	# Detect chrootdir filesystem type
	local chroottype=$(stat -f -c %T "$chrootdir")

	# Get a read lock on the root chroot to make
	# sure we don't clone a half-updated chroot
	slock 8 "$chrootdir/root.lock" \
		"Locking clean chroot [%s]" "$chrootdir/root"

	stat_busy "Synchronizing chroot copy [%s] -> [%s]" "$chrootdir/root" "$copydir"
	if [[ "$chroottype" == btrfs ]] && ! mountpoint -q "$copydir"; then
		if [[ -d $copydir ]]; then
			btrfs_subvolume_delete "$copydir" >/dev/null ||
				die "Unable to delete subvolume %s" "$copydir"
		fi
		btrfs subvolume snapshot "$chrootdir/root" "$copydir" >/dev/null ||
			die "Unable to create subvolume %s" "$copydir"
	else
		mkdir -p "$copydir"
		rsync -a --delete -q -W -x "$chrootdir/root/" "$copydir"
	fi
	stat_done

	# Drop the read lock again
	lock_close 8

	# Update mtime
	touch "$copydir"
}

# Usage: delete_chroot $copydir
delete_chroot() {
	local copydir=$1
	# Detect chrootdir filesystem type
	local chroottype=$(stat -f -c %T "$copydir")

	stat_busy "Removing chroot copy [%s]" "$copydir"
	if [[ "$chroottype" == btrfs ]] && ! mountpoint -q "$copydir"; then
		btrfs_subvolume_delete "$copydir" >/dev/null ||
			die "Unable to delete subvolume %s" "$copydir"
	else
		# avoid change of filesystem in case of an umount failure
		rm --recursive --force --one-file-system "$copydir" ||
			die "Unable to delete %s" "$copydir"
	fi

	# remove lock file
	rm -f "$copydir.lock"
	stat_done
}

# Usage: install_packages $copydir $pkgs...
install_packages() {
	local copydir=$1
	local install_pkgs=("${@:2}")
	declare -i ret=0
	local pkgname

	local install_pkg
	for install_pkg in "${install_pkgs[@]}"; do
		pkgname="${install_pkg##*/}"
		cp "$install_pkg" "$copydir/$pkgname"

		arch-nspawn "$copydir" \
			"${bindmounts_ro[@]}" "${bindmounts_rw[@]}" \
			pacman -U /$pkgname --noconfirm
		(( ret += !! $? ))

		rm "$copydir/$pkgname"
	done

	return $ret
}

# Usage: prepare_chroot $copydir $HOME $repack $run_namcap
# Globals:
#  - MAKEFLAGS
#  - PACKAGER
prepare_chroot() {
	local copydir=$1
	local USER_HOME=$2
	local repack=$3
	local run_namcap=$4

	$repack || rm -rf "$copydir/build"

	mkdir -p "$copydir/build"
	if ! grep -q 'BUILDDIR="/build"' "$copydir/etc/makepkg.conf"; then
		echo 'BUILDDIR="/build"' >> "$copydir/etc/makepkg.conf"
	fi

	# Read .makepkg.conf and gnupg pubring
	if [[ -r $USER_HOME/.gnupg/pubring.kbx ]]; then
		install -D "$USER_HOME/.gnupg/pubring.kbx" "$copydir/build/.gnupg/pubring.kbx"
	fi
	if [[ -r $USER_HOME/.gnupg/pubring.gpg ]]; then
		install -D "$USER_HOME/.gnupg/pubring.gpg" "$copydir/build/.gnupg/pubring.gpg"
	fi

	mkdir -p "$copydir/pkgdest"
	if ! grep -q 'PKGDEST="/pkgdest"' "$copydir/etc/makepkg.conf"; then
		echo 'PKGDEST="/pkgdest"' >> "$copydir/etc/makepkg.conf"
	fi

	mkdir -p "$copydir/srcpkgdest"
	if ! grep -q 'SRCPKGDEST="/srcpkgdest"' "$copydir/etc/makepkg.conf"; then
		echo 'SRCPKGDEST="/srcpkgdest"' >> "$copydir/etc/makepkg.conf"
	fi

	mkdir -p "$copydir/logdest"
	if ! grep -q 'LOGDEST="/logdest"' "$copydir/etc/makepkg.conf"; then
		echo 'LOGDEST="/logdest"' >> "$copydir/etc/makepkg.conf"
	fi

	# These two get bind-mounted read-only
	# XXX: makepkg dislikes having these dirs read-only, so separate them
	mkdir -p "$copydir/startdir" "$copydir/startdir_host"
	mkdir -p "$copydir/srcdest" "$copydir/srcdest_host"
	if ! grep -q 'SRCDEST="/srcdest"' "$copydir/etc/makepkg.conf"; then
		echo 'SRCDEST="/srcdest"' >> "$copydir/etc/makepkg.conf"
	fi

	builduser_uid=${SUDO_UID:-$UID}

	# We can't use useradd without chrooting, otherwise it invokes PAM modules
	# which we might not be able to load (i.e. when building i686 packages on
	# an x86_64 host).
	printf 'builduser:x:%d:100:builduser:/build:/bin/bash\n' "$builduser_uid" >>"$copydir/etc/passwd"
	chown -R "$builduser_uid" "$copydir"/{build,pkgdest,srcpkgdest,logdest,srcdest,startdir}

	if [[ -n ${MAKEFLAGS:-} ]]; then
		sed -i '/^MAKEFLAGS=/d' "$copydir/etc/makepkg.conf"
		echo "MAKEFLAGS='${MAKEFLAGS}'" >> "$copydir/etc/makepkg.conf"
	fi

	if [[ -n ${PACKAGER:-} ]]; then
		sed -i '/^PACKAGER=/d' "$copydir/etc/makepkg.conf"
		echo "PACKAGER='${PACKAGER}'" >> "$copydir/etc/makepkg.conf"
	fi

	if [[ ! -f $copydir/etc/sudoers.d/builduser-pacman ]]; then
		cat > "$copydir/etc/sudoers.d/builduser-pacman" <<EOF
Defaults env_keep += "HOME"
builduser ALL = NOPASSWD: /usr/bin/pacman
EOF
		chmod 440 "$copydir/etc/sudoers.d/builduser-pacman"
	fi

	if ! grep -q '^\[repo\]' "$copydir/etc/pacman.conf"; then
		local line=$(grep -n '^\[' "$copydir/etc/pacman.conf" |grep -Fv ':[options]'|sed 's/:.*//;1q')
		local ins='[repo]
SigLevel = Optional TrustAll
Server = file:///repo
'
		sed -i "${line}i${ins//$'\n'/\\n}" "$copydir/etc/pacman.conf"
	fi

	# This is a little gross, but this way the script is recreated every time in the
	# working copy
	{
		printf '#!/bin/bash\n'
		declare -f _chrootprepare
		printf '_chrootprepare "$@"\n'
	} > "$copydir/chrootprepare"
	chmod +x "$copydir/chrootprepare"
	{
		printf '#!/bin/bash\n'
		declare -f _chrootbuild
		printf '_chrootbuild "$@" || exit\n'

		if $run_namcap; then
			cat <<'EOF'
pacman -S --needed --noconfirm namcap
for pkgfile in /startdir/PKGBUILD /pkgdest/*; do
	echo "Checking ${pkgfile##*/}"
	sudo -u builduser namcap "$pkgfile" 2>&1 | tee "/logdest/${pkgfile##*/}-namcap.log"
done
EOF
		fi
	} >"$copydir/chrootbuild"
	chmod +x "$copydir/chrootbuild"
}

# Usage: download_sources $copydir $src_owner
# Globals:
#  - SRCDEST
download_sources() {
	local copydir=$1
	local src_owner=$2

	local builddir="$(mktemp -d)"
	chmod 1777 "$builddir"

	# Ensure sources are downloaded
	if [[ $USER != $src_owner ]]; then
		sudo -u $src_owner env SRCDEST="$SRCDEST" BUILDDIR="$builddir" \
			makepkg --config="$copydir/etc/makepkg.conf" --verifysource -o
	else
		( export SRCDEST BUILDDIR="$builddir"
			makepkg --asroot --config="$copydir/etc/makepkg.conf" --verifysource -o
		)
	fi
	(( $? != 0 )) && die "Could not download sources."

	# Clean up garbage from verifysource
	rm -rf "$builddir"
}

_chrootprepare() {
	# This function isn't run in makechrootpkg,
	# so no global variables

	. /etc/profile
	export HOME=/build
	shopt -s nullglob

	# XXX: Workaround makepkg disliking read-only dirs
	rm -rf -- /srcdest/* /startdir/*
	ln -sft /srcdest /srcdest_host/*
	ln -sft /startdir /startdir_host/*

	# XXX: Keep bzr and svn sources writable
	# Since makepkg 4.1.1 they get checked out via cp -a, copying the symlink
	for dir in /srcdest /startdir; do
		for vcs in bzr svn; do
			cd "$dir"
			for vcsdir in */.$vcs; do
				rm "${vcsdir%/.$vcs}"
				cp -a "${dir}_host/${vcsdir%/.$vcs}" .
				chown -R builduser "${vcsdir%/.$vcs}"
			done
		done
	done

	cd /startdir

	# XXX: Keep PKGBUILD writable for pkgver()
	rm PKGBUILD*
	cp /startdir_host/PKGBUILD* .
	chown builduser PKGBUILD*

	# Safety check
	if [[ ! -w PKGBUILD ]]; then
		echo "Can't write to PKGBUILD!"
		exit 1
	fi

	# Sync deps now, as networking may be disabled during _chrootbuild
	cp /repo/repo.db /var/lib/pacman/sync/repo.db
	sudo -u builduser makepkg "$@" --nobuild
}

_chrootbuild() {
	# This function isn't run in makechrootpkg,
	# so no global variables

	. /etc/profile
	export HOME=/build
	shopt -s nullglob

	cd /startdir

	sudo -u builduser makepkg "$@" --noextract --noprepare
}

# Usage: move_products $copydir $owner
# Globals:
#  - PKGDEST
#  - LOGDEST
move_products() {
	local copydir=$1
	local src_owner=$2

	local pkgfile
	for pkgfile in "$copydir"/pkgdest/*; do
		chown "$src_owner" "$pkgfile"
		mv "$pkgfile" "$PKGDEST"
		if [[ $PKGDEST != $PWD ]]; then
			ln -sf "$PKGDEST/${pkgfile##*/}" .
		fi
	done

	local l
	for l in "$copydir"/logdest/*; do
		[[ $l == */logpipe.* ]] && continue
		chown "$src_owner" "$l"
		mv "$l" "$LOGDEST"
	done

	for s in "$copydir"/srcpkgdest/*; do
		chown "$src_owner" "$s"
		mv "$s" "$SRCPKGDEST"
	done
}
# }}}

main() {
	init_variables

	orig_argv=("$@")

	while getopts 'hcur:I:l:nTD:d:' arg; do
		case "$arg" in
			c) clean_first=true ;;
			D) bindmounts_ro+=(--bind-ro="$OPTARG") ;;
			d) bindmounts_rw+=(--bind="$OPTARG") ;;
			u) update_first=true ;;
			r) passeddir="$OPTARG" ;;
			I) install_pkgs+=("$OPTARG") ;;
			l) copy="$OPTARG" ;;
			n) run_namcap=true; makepkg_args+=(-i) ;;
			T) temp_chroot=true; copy+="-$$" ;;
			h|*) usage ;;
		esac
	done

	[[ ! -f PKGBUILD && -z "${install_pkgs[*]}" ]] && die 'This must be run in a directory containing a PKGBUILD.'

	check_root "$0" "${orig_argv[@]}"

	# Canonicalize chrootdir, getting rid of trailing /
	chrootdir=$(readlink -e "$passeddir")
	[[ ! -d $chrootdir ]] && die "No chroot dir defined, or invalid path '%s'" "$passeddir"
	[[ ! -d $chrootdir/root ]] && die "Missing chroot dir root directory. Try using: mkarchroot %s/root base-devel" "$chrootdir"

	# Detect chrootdir filesystem type
	chroottype=$(stat -f -c %T "$chrootdir")

	if [[ ${copy:0:1} = / ]]; then
		copydir=$copy
	else
		copydir="$chrootdir/$copy"
	fi

	# Pass all arguments after -- right to makepkg
	makepkg_args+=("${@:$OPTIND}")

	# See if -R was passed to makepkg
	for arg in "${@:OPTIND}"; do
		case ${arg%%=*} in
			-*R*|--repackage)
				repack=true
				break 2
				;;
		esac
	done

	if [[ -n $SUDO_USER ]]; then
		eval "USER_HOME=~$SUDO_USER"
	else
		USER_HOME=$HOME
	fi

	umask 0022

	load_vars "$USER_HOME/.makepkg.conf"
	load_vars /etc/makepkg.conf

	# Use PKGBUILD directory if these don't exist
	[[ -d $PKGDEST ]]    || PKGDEST=$PWD
	[[ -d $SRCDEST ]]    || SRCDEST=$PWD
	[[ -d $SRCPKGDEST ]] || SRCPKGDEST=$PWD
	[[ -d $LOGDEST ]]    || LOGDEST=$PWD

	# Lock the chroot we want to use. We'll keep this lock until we exit.
	lock 9 "$copydir.lock" "Locking chroot copy [%s]" "$copy"

	if [[ ! -d $copydir ]] || $clean_first; then
		sync_chroot "$chrootdir" "$copy"
	fi

	$update_first && arch-nspawn "$copydir" \
			"${bindmounts_ro[@]}" "${bindmounts_rw[@]}" \
			pacman -Syu --noconfirm

	if [[ -n ${install_pkgs[*]:-} ]]; then
		install_packages "$copydir" "${install_pkgs[@]}"
		ret=$?
		# If there is no PKGBUILD we have done
		[[ -f PKGBUILD ]] || exit $ret
	fi

	download_sources "$copydir" "$src_owner"

	prepare_chroot "$copydir" "$USER_HOME" "$repack"

	if arch-nspawn "$copydir" \
		--bind-ro="$PWD:/startdir_host" \
		--bind-ro="$SRCDEST:/srcdest_host" \
		"${bindmounts_ro[@]}" "${bindmounts_rw[@]}" \
		/chrootprepare "${makepkg_args[@]}" &&
	   arch-nspawn "$copydir" \
		--bind-ro="$PWD:/startdir_host" \
		--bind-ro="$SRCDEST:/srcdest_host" \
		"${bindmounts_ro[@]}" "${bindmounts_rw[@]}" \
		/chrootbuild "${makepkg_args[@]}"
	then
		move_products "$copydir" "$src_owner"
	else
		(( ret += 1 ))
	fi

	$temp_chroot && delete_chroot "$copydir"

	if (( ret != 0 )); then
		if $temp_chroot; then
			die "Build failed"
		else
			die "Build failed, check %s/build" "$copydir"
		fi
	else
		true
	fi
}