abuild.in 53.5 KB
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#!/bin/sh

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# abuild - build apk packages (light version of makepkg)
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# Copyright (c) 2008-2015 Natanael Copa <ncopa@alpinelinux.org>
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#
# Distributed under GPL-2
#

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program_version=@VERSION@
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sysconfdir=@sysconfdir@
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abuildrepo_base=@abuildrepo@
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datadir=@datadir@
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abuild_path=$(readlink -f $0)
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if ! [ -f "$datadir/functions.sh" ]; then
	echo "$datadir/functions.sh: not found" >&2
	exit 1
fi
. "$datadir/functions.sh"

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# defaults
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BUILD_BASE="build-base"
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: ${FAKEROOT:="fakeroot"}
: ${SUDO_APK:="abuild-apk"}
: ${APK:="apk"}
: ${ADDUSER:="abuild-adduser"}
: ${ADDGROUP:="abuild-addgroup"}
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apk_opt_wait="--wait 30"
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# run optional log command for remote logging
logcmd() {
	${ABUILD_LOG_CMD:-true} "$@"
	return 0
}
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# we override the default msg, warning and error as we want the pkgname
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msg() {
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	[ -n "$quiet" ] && return 0
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	local prompt="$GREEN>>>${NORMAL}"
	local fake="${FAKEROOTKEY:+${BLUE}*${NORMAL}}"
	local name="${STRONG}${subpkgname:-$pkgname}${NORMAL}"
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	printf "${prompt} ${name}${fake}: %s\n" "$1" >&2
}

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warning() {
	local prompt="${YELLOW}>>> WARNING:${NORMAL}"
	local fake="${FAKEROOTKEY:+${BLUE}*${NORMAL}}"
	local name="${STRONG}${subpkgname:-$pkgname}${NORMAL}"
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	printf "${prompt} ${name}${fake}: %s\n" "$1" >&2
}

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error() {
	local prompt="${RED}>>> ERROR:${NORMAL}"
	local fake="${FAKEROOTKEY:+${BLUE}*${NORMAL}}"
	local name="${STRONG}${subpkgname:-$pkgname}${NORMAL}"
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	printf "${prompt} ${name}${fake}: %s\n" "$1" >&2
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	logcmd "ERROR: $pkgname: $1"
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}

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cross_compiling() {
	test "$CBUILD" != "$CHOST" -a -n "$CBUILDROOT"
}

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cleanup() {
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	local i=
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	set_xterm_title ""
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	if [ -n "$CLEANUP_FILES" ]; then
		rm -f $CLEANUP_FILES
	fi
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	for i; do
		case $i in
		pkgdir) msg "Cleaning up pkgdir"; rm -rf "$pkgbasedir";;
		srcdir) msg "Cleaning up srcdir"; rm -rf "$srcdir";;
		deps)
			if [ -z "$install_after" ] && [ -n "$uninstall_after" ]; then
				msg "Uninstalling dependencies..."
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				$SUDO_APK del --quiet $apk_opt_wait $uninstall_after
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				if cross_compiling; then
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					$SUDO_APK del --root "$CBUILDROOT" \
						--quiet $apk_opt_wait \
						$uninstall_after
				fi
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			fi
			;;
		esac
	done
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}

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die() {
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	error "$@"
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	cleanup $ERROR_CLEANUP
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	exit 1
}

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spell_error() {
	die "APKBUILD contains '$1'. It should be '$2'"
}

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# check if apkbuild is basicly sane
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default_sanitycheck() {
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	local i= j= suggestion=
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	msg "Checking sanity of $APKBUILD..."
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	[ -z "$pkgname" ] && die "Missing pkgname in APKBUILD"
	[ -z "${pkgname##* *}" ] && die "pkgname contains spaces"
	[ -z "$pkgver" ] && die "Missing pkgver in APKBUILD"
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	if [ "$pkgver" != "volatile" ] && [ -z "$nodeps" ]; then
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		$APK version --check --quiet "$pkgver" ||\
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			die "$pkgver is not a valid version"
	fi
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	[ -z "$pkgrel" ] && die "Missing pkgrel in APKBUILD"
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	[ -z "$pkgdesc" ] && die "Missing pkgdesc in APKBUILD"
	[ -z "$url" ] && die "Missing url in APKBUILD"
	[ -z "$license" ] && die "Missing license in APKBULID"
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	if [ $(echo "$pkgdesc" | wc -c) -gt 128 ]; then
		die "pkgdesc is too long"
	fi
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	is_function package || warning "Missing package() function in APKBUILD"
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	if [ -n "$replaces_priority" ] \
		&& ! echo $replaces_priority | egrep -q '^[0-9]+$'; then
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		die "replaces_priority must be a number"
	fi
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	# check so no package names starts with -
	for i in $pkgname $subpackages; do
		case $i in
		-*) die "${i%:*} is not a valid package name";;
		esac
	done

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	# check if CARCH, CBUILD, CHOST and CTARGET is set
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	[ -z "$CHOST" ] && die "Please set CHOST in /etc/abuild.conf"

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	if [ -z "$CARCH" ]; then
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		die "Please fix CHOST, or set CARCH in abuild.conf"
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	fi
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	for i in $install; do
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		local n=${i%.*}
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		local suff=${i##*.}
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		case "$suff" in
		pre-install|post-install|pre-upgrade|post-upgrade|pre-deinstall|post-deinstall);;
		*) die "$i: unknown install script suffix"
		esac
		if ! subpackages_has "$n" && [ "$n" != "$pkgname" ]; then
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			die "$i: install script does not match pkgname or any subpackage"
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		fi
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		[ -e "$startdir/$i" ] || die "install script $i is missing"
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		for j in chown chmod chgrp; do
			if grep -q $j "$startdir"/$i; then
				warning "$i: found $j"
				warning2 "Permissions should be fixed in APKBUILD package()"
			fi
		done
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	done
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	for i in $triggers; do
		local f=${i%=*}
		local p=${f%.trigger}
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		[ "$f" = "$i" ] && die "$f: triggers must contain '='"
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		[ "$p" = "$f" ] && die "$f: triggers scripts must have .trigger suffix"
		if ! subpackages_has "$p" && [ "$p" != "$pkgname" ]; then
			die "$p: trigger script does not match pkgname or any subpackage"
		fi
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		[ -e "$startdir"/$f ] || die "trigger script $f is missing"
	done
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	if [ -n "$source" ]; then
		for i in $source; do
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			if install_has "$i"; then
				warning "You should not have \$install in source"
				continue
			fi
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			case "$i" in
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				*::*) i=${i%%::*};;
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				https://*) makedepends_has wget && warning "wget no longer need to be in makedepends when source has https://" ;;
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			esac
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			list_has ${i##*/} $md5sums $sha256sums $sha512sums \
				|| die "${i##*/} is missing in checksums"
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			# verify that our source does not have git tag version
			# name as tarball (typicallly github)
			if is_remote "$i" && [ "${i#*::}" = "$i" ]; then
				case ${i##*/} in
				v$pkgver.tar.*|$pkgver.tar.*)
					die "source ${i##*/} needs to be renamed to avoid possible collisions"
					;;
				esac
			fi
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		done
	fi
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	# verify that things listed in checksum also is listed in source
	local algo=
	for algo in md5 sha256 sha512; do
		eval set -- \$${algo}sums
		while [ $# -gt 1 ]; do
			local file="$2"
			shift 2
			source_has $file || die "$file exists in ${algo}sums but is missing in source"
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		done
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	done
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	# common spelling errors
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	[ -n "$depend" ] && spell_error depend depends
	[ -n "$makedepend" ] && spell_error makedepend makedepends
	[ -n "$pkguser" ] && spell_error pkguser pkgusers
	[ -n "$pkggroup" ] && spell_error pkggroup pkggroups
	[ -n "$subpackage" ] && spell_error subpackage subpackages
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	grep '^# Maintainer:' $APKBUILD >/dev/null || warning "No maintainer"
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	makedepends_has 'g++' && warning "g++ should not be in makedepends"
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	return 0
}

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sanitycheck() {
	default_sanitycheck
}

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sumcheck() {
	local algo="$1" sums="$2"
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	local dummy f endreturnval originalparams origin file
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	# get number of checksums
	set -- $sums
	local numsums=$(( $# / 2 ))

	set -- $source
	if [ $# -ne $numsums ]; then
		die "Number of ${algo}sums($numsums) does not correspond to number of sources($#)"
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	fi
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	fetch || return 1
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	msg "Checking ${algo}sums..."
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	cd "$srcdir" || return 1
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	IFS=$'\n'
	endreturnval=0
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	for src in $sums; do
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		origin=$1; shift
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		echo "$src" | ${algo}sum -c
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		if [ $? -ne 0 ]; then
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			endreturnval=1
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			is_remote $origin || continue
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			echo "Because the remote file above failed the ${algo}sum check it will be deleted."
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			echo "Rebuilding will cause it to re-download which in some cases may fix the problem."
			file=`echo "$src" | sed 's/.*[ \t\n]\(.*\)/\1/'`
			echo "Deleting: $file"
			rm $file
		fi
	done
	unset IFS
	return $endreturnval
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}

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# for compatibility
md5check() {
	warning "'md5check' is deprecated. Use 'verify' instead"
	sumcheck md5 "$md5sums"
}

# verify checksums
verify() {
	local verified=false algo=
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	for algo in sha512 sha256 sha1 md5; do
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		local sums=
		eval sums=\"\$${algo}sums\"
		if [ -z "$sums" ] || [ -z "$source" ]; then
			continue
		fi
		sumcheck "$algo" "$sums" || return 1
		verified=true
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		break
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	done
	if [ -n "$source" ] && ! $verified; then
		die "Use 'abuild checksum' to generate/update the checksum(s)"
	fi
	return 0
}

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# verify upstream sources
sourcecheck() {
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	local uri
	for uri in $source; do
		is_remote $uri || continue
		case "$uri" in
		saveas-*://*)
			uri=${uri#saveas-}
			uri=${uri%/*}
			;;
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		*::*)
			uri=${uri##*::}
			;;
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		esac
		wget -q -s "$uri" || return 1
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	done
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	return 0
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}
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# convert curl options to wget options and call wget instead of curl
wget_fallback() {
	local wget_opts= outfile= opt=
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	while getopts "C:Lko:s" opt; do
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		case $opt in
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		'L') ;; # --location. wget does this by default
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		'f') ;; # --fail. wget does this by default
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		'C') wget_opts="$wget_opts -c";; # --continue-at
		's') wget_opts="$wget_opts -q";; # --silent
		'o') wget_opts="$wget_opts -O $OPTARG";; # --output
		'k') wget_opts="$wget_opts --no-check-certificate";; #gnu wget
		esac
	done
	shift $(( $OPTIND - 1 ))
	wget $wget_opts "$1"
}

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uri_fetch() {
	local uri="$1"
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	local d="${uri##*/}"	# $(basename $uri)
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	local opts
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	[ -n "$quiet" ] && opts="-s"
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	local lockfile="$SRCDEST/$d".lock
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	# fix saveas-*://* URIs
	case "$uri" in
		# remove 'saveas-' from beginning and
		# '/filename' from end of URI
		saveas-*://*) uri="${uri:7:$(expr ${#uri} - 7 - ${#d} - 1)}";;
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		*::*)
			d=${uri%%::*}
			uri=${uri#$d::}
			;;
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	esac
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	case "$uri" in
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		https://*) opts="-k";;
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	esac
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	mkdir -p "$SRCDEST"
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	CLEANUP_FILES="$CLEANUP_FILES $lockfile"
	(
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	flock -n -x 9 || msg "Waiting for ${lockfile##*/}..."
	flock -x 9
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	[ -f "$SRCDEST/$d" ] && exit 0 # use exit since its a subshell

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	if [ -f "$SRCDEST/$d.part" ]; then
		msg "Partial download found. Trying to resume"
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		opts="$opts -C -"
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	fi
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	msg "Fetching $uri"
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	# fallback to wget if curl is missing. useful for bootstrapping
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	local fetcher=
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	if ! [ -x "$(which curl)" ]; then
		fetcher=wget_fallback
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	else
		fetcher=curl
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		opts="$opts -L -f -k"
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	fi

	$fetcher $opts -o "$SRCDEST/$d.part" "$uri" \
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		&& mv "$SRCDEST/$d.part" "$SRCDEST/$d"
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	) 9>$lockfile
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	local rc=$?
	rm -f "$lockfile"
	return $rc
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}

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is_remote() {
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	case "${1#*::}" in
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		http://*|ftp://*|https://*|saveas-*://*)
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			return 0;;
	esac
	return 1
}

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filename_from_uri() {
	local uri="$1"
	local filename="${uri##*/}"  # $(basename $uri)
	case "$uri" in
	*::*) filename=${uri%%::*};;
	esac
	echo "$filename"
}

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# try download from file from mirror first
uri_fetch_mirror() {
	local uri="$1"
	if [ -n "$DISTFILES_MIRROR" ]; then
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		if is_remote "$DISTFILES_MIRROR"; then
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			uri_fetch "$DISTFILES_MIRROR"/$(filename_from_uri $uri)\
				&& return 0
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		else
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			cp "$DISTFILES_MIRROR"/$(filename_from_uri $uri) \
				"$SRCDEST" && return 0
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		fi
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	fi
	uri_fetch "$uri"
}

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default_fetch() {
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	local s
	mkdir -p "$srcdir"
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	for s in $source; do
		if is_remote "$s"; then
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			uri_fetch_mirror "$s" || return 1
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			ln -sf "$SRCDEST/$(filename_from_uri $s)" "$srcdir"/
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		else
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			ln -sf "$startdir/$s" "$srcdir/"
		fi
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	done
}

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fetch() {
	default_fetch
}

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# verify that all init.d scripts are openrc runscripts
initdcheck() {
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	local i line
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	for i in $source; do
		case $i in
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		*.initd) line=$(head -n 1 "$srcdir"/$i);;
		*) continue ;;
		esac

		case "$line" in
		*sbin/openrc-run)
			;;
		*sbin/runscript)
			warning "$i is not an openrc #!/sbin/openrc-run"
			;;
		*)	error "$i is not an openrc #!/sbin/openrc-run"
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			return 1
			;;
		esac
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	done
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}

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# unpack the sources
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default_unpack() {
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	local u
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	if [ -z "$force" ]; then
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		verify || return 1
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		initdcheck || return 1
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	fi
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	mkdir -p "$srcdir"
	for u in $source; do
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		local s="$SRCDEST/$(filename_from_uri $u)"
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		case "$s" in
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			*.tar)
				msg "Unpacking $s..."
				tar -C "$srcdir" -xf "$s" || return 1;;
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			*.tar.gz|*.tgz)
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				msg "Unpacking $s..."
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				tar -C "$srcdir" -zxf "$s" || return 1;;
			*.tar.bz2)
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				msg "Unpacking $s..."
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				tar -C "$srcdir" -jxf "$s" || return 1;;
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			*.tar.lzma)
				msg "Unpacking $s..."
				unlzma -c "$s" | tar -C "$srcdir" -x  \
					|| return 1;;
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			*.tar.xz)
				msg "Unpacking $s..."
				unxz -c "$s" | tar -C "$srcdir" -x || return 1;;
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			*.zip)
				msg "Unpacking $s..."
				unzip "$s" -d "$srcdir" || return 1;;
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		esac
	done
}

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unpack() {
	default_unpack
}

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# cleanup source and package dir
clean() {
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	msg "Cleaning temporary build dirs..."
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	rm -rf "$srcdir"
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	rm -rf "$pkgbasedir"
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}

# cleanup fetched sources
cleancache() {
	local s
	for s in $source; do
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		if is_remote "$s"; then
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			s=$(filename_from_uri $s)
			msg "Cleaning downloaded $s ..."
			rm -f "$SRCDEST/$s"
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		fi
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	done
}

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listpkgnames() {
	local i
	for i in $pkgname $subpackages; do
		echo ${i%:*}
	done
	for i in $linguas; do
		echo $pkgname-lang-$i
	done
}

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cleanpkg() {
	local i
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	getpkgver || return 1
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	msg "Cleaning built packages..."
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	for i in $(listpkgnames); do
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		local p="${i%:*}-$pkgver-r$pkgrel"
		rm -f "$PKGDEST/$p.apk" "$PKGDEST/$p.src.tar.gz" \
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			"$abuildrepo"/$p.apk "$abuildrepo"/*/$p.apk
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	done
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	# remove given packages from index
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	update_abuildrepo_index
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}

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# clean all packages except current
cleanoldpkg() {
	local i j
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	getpkgver || return 1
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	msg "Cleaning all packages except $pkgver-r$pkgrel..."
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	for i in $(listpkgnames); do
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		local pn=${i%:*}
		for j in "$PKGDEST"/$pn-[0-9]*.apk ; do
			[ "$j" = "$PKGDEST/$pn-$pkgver-r$pkgrel.apk" ] \
				&& continue
			rm -f "$j" "$abuildrepo"/*/${j##*/}
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		done
	done
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	update_abuildrepo_index
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	return 0
}
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mkusers() {
	local i
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	for i in $pkggroups; do
		if ! getent group $i >/dev/null; then
			msg "Creating group $i"
			$ADDGROUP -S $i || return 1
		fi
	done
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	for i in $pkgusers; do
		if ! getent passwd $i >/dev/null; then
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			local gopt=
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			msg "Creating user $i"
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			if getent group $i >/dev/null; then
				gopt="-G $i"
			fi
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			$ADDUSER -S -D -H $gopt $i || return 1
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		fi
	done
}

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# helper to update config.sub to a recent version
update_config_sub() {
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	local changed=false
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	find . -name config.sub | while read f; do
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		if ! ./$f armv6-alpine-linux-muslgnueabihf 2>/dev/null; then
			msg "Updating $f"
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			cp "$datadir"/${f##*/} "$f" || return 1
			changed=true
		else
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			msg "No update needed for $f"
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		fi
		# pipe subshell will return status of last command
		$changed
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	done
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	return $?
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}
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runpart() {
	local part=$1
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	[ -n "$DEBUG" ] && msg "$part"
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	$part || die "$part failed"
}

# override those in your build script
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getpkgver() {
	# this func is supposed to be overridden by volatile packages
	if [ "$pkgver" = "volatile" ]; then
		error "Please provide a getpkgver() function in your APKBUILD"
		return 1
	fi
}

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prepare() {
	:
}

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build() {
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	:
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}

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# generate a simple tar.gz package of pkgdir
targz() {
	cd "$pkgdir" || return 1
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	mkdir -p "$PKGDEST"
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	tar -czf "$PKGDEST"/$pkgname-$pkgver-r$pkgrel.tar.gz *
}

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get_split_func() {
	# get the 'func' from "sub-pkg:func"
	local func=${1##*:}

	# get 'func' from "sub-pkg-func" if there was no :func
	[ "$func" = "$1" ] && func=${func##*-}
	echo $func
}

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postcheck() {
	local dir="$1" name="$2" i=
	msg "Running postcheck for $name"
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	# checking for FHS compat
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	if ! options_has "!fhs"; then
		for i in "$dir"/srv/* "$dir"/usr/local/* "$dir"/opt/*; do
			if [ -e "$i" ]; then
				error "Packages must not put anything under /srv, /usr/local or /opt"
				return 1
			fi
		done
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		if [ -d "$dir"/usr/var ]; then
			error "Found /usr/var, localstatedir is most likely wrong"
			return 1
		fi
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	fi
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	# remove *.la files if libtool is not set
	if ! options_has "libtool"; then
		find "$dir" -name '*.la' -type f -delete
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	fi
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	# look for /usr/lib/charset.alias
	if [ -e "$dir"/usr/lib/charset.alias ] \
			&& ! options_has "charset.alias"; then
		error "Found /usr/lib/charset.alias"
		return 1
	fi
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	# check directory permissions
	i=$(find "$dir" -type d -perm -777 | sed "s|^$dir|\t|")
	if [ -n "$i" ]; then
		warning "World writeable directories found:"
		echo "$i"
	fi
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	# check so we dont have any suid root binaries that are not PIE
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	i=$(find "$dir" -type f -perm +6000 \
		| xargs scanelf --nobanner --etype ET_EXEC \
		| sed "s|ET_EXEC $dir|\t|")
	if [ -n "$i" ]; then
		error "Found non-PIE files that has SUID:"
		echo "$i"
		return 1
	fi
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	# test suid bit on executable
	if ! options_has "suid"; then
		i=$(find "$dir" \( -perm -u+s -o -perm -g+s \) -a -type f \
			-a -perm -o+x)
		if [ -n "$i" ]; then
			error "Found executable files with SUID bit set:"
			echo "$i"
			return 1
		fi
	fi

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	# test for textrels
	if ! options_has "textrels"; then
		local res="$(scanelf --recursive --textrel --quiet "$dir")"
		if [ -n "$res" ]; then
			error "Found textrels:"
			echo "$res"
			return 1
		fi
	fi
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	return 0
}

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pre_split() {
	if [ -z "$subpkgname" ]; then
		return 0
	fi
	# the subpackages should not inherit those form main package
	provides=""
	install_if=""
}

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prepare_subpackages() {
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	local i
	cd "$startdir"
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	for i in $subpackages; do
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		local func=$(get_split_func $i)
		# call abuild recursively, setting subpkg{dir,name}
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		msg "Running split function $func..."
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		local dir="$pkgbasedir/${i%:*}" name="${i%:*}"
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		( subpkgdir="$dir" subpkgname="$name" \
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			$0 pre_split $func prepare_package \
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			&& postcheck "$dir" "$name" ) || return 1
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	done
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	postcheck "$pkgdir" "$pkgname" || return 1
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	# post check for /usr/share/locale
	if [ -d "$pkgdir"/usr/share/locale ]; then
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		warning "Found /usr/share/locale"
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		warning2 "Maybe add \$pkgname-lang to subpackages?"
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	fi
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}

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default_lang() {
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	pkgdesc="Languages for package $pkgname"
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	install_if="$pkgname=$pkgver-r$pkgrel lang"
	arch="noarch"
	local dir
	for dir in ${langdir:-/usr/share/locale}; do
		mkdir -p "$subpkgdir"/${dir%/*}
		mv "$pkgdir"/"$dir" "$subpkgdir"/"$dir" || return 1
	done
}

lang() {
	default_lang
}

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default_lang_subpkg() {
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	if [ -z "$lang" ]; then
		error "lang is not set"
		return 1
	fi
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	pkgdesc="$pkgname language pack for $lang"
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	arch="noarch"
	install_if="$pkgname=$pkgver-r$pkgrel lang-$lang"
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	local dir
	for dir in ${langdir:-/usr/share/locale}; do
		mkdir -p "$subpkgdir"/$dir
		mv "$pkgdir"/$dir/$lang* \
		"$subpkgdir"/$dir/ \
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		|| return 1
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	done
}

lang_subpkg() {
	default_lang_subpkg
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}

prepare_language_packs() {
	for lang in $linguas; do
		lang="$lang" \
		subpkgname="$pkgname-lang-$lang" \
		subpkgdir="$pkgbasedir"/$subpkgname \
			$0 lang_subpkg prepare_package || return 1
	done
}

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# echo '-dirty' if git is not clean
git_dirty() {
	if [ $(git status -s "$startdir" | wc -l) -ne 0 ]; then
		echo "-dirty"
	fi
}

# echo last commit hash id
git_last_commit() {
	git log --format=oneline -n 1 "$startdir" | awk '{print $1}'
}

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get_maintainer() {
	if [ -z "$maintainer" ]; then
		maintainer=$(awk -F': ' '/\# *Maintainer/ {print $2}' "$APKBUILD")
	fi
}

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prepare_metafiles() {
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	getpkgver || return 1
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	local name=${subpkgname:-$pkgname}
	[ -z "${name##* *}" ] && die "package name contains spaces"
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	local dir=${subpkgdir:-$pkgdir}
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	local pkg="$name-$pkgver-r$pkgrel.apk"
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	local pkginfo="$controldir"/.PKGINFO
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	local sub
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	[ ! -d "$dir" ] && die "Missing $dir"
	cd "$dir"
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	mkdir -p "$controldir"
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	local builddate=$(date -u "+%s")
	local size=$(du -sk | awk '{print $1 * 1024}')
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	local parch="$CARCH"
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	# we need to wait with setting noarch til our build infra can handle it
#	if [ "$arch" = "noarch" ]; then
#		parch="noarch"
#	fi
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	echo "# Generated by $(basename $0) $program_version" >"$pkginfo"
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	if [ -n "$FAKEROOTKEY" ]; then
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		echo "# using $($FAKEROOT -v)" >> "$pkginfo"
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	fi
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	echo "# $(date -u)" >> "$pkginfo"
	cat >> "$pkginfo" <<EOF
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pkgname = $name
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pkgver = $pkgver-r$pkgrel
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pkgdesc = $pkgdesc
url = $url
builddate = $builddate
packager = ${PACKAGER:-"Unknown"}
size = $size
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arch = $parch
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origin = $pkgname
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EOF
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	local i deps
	deps="$depends"
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	if [ "$pkgname" != "busybox" ] && ! depends_has busybox; then
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		for i in $install $triggers; do
			local s=${i%=*}
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			[ "$name" != "${s%.*}" ] && continue
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			if head -n 1 "$startdir/$s" | grep '^#!/bin/sh' >/dev/null ; then
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				msg "Script found. busybox added as a dependency for $pkg"
				deps="$deps busybox"
				break
			fi
		done
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	fi
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	# store last_commit in global var so we only call git once
	if [ -z "$last_commit" ]; then
		last_commit="$(git_last_commit)$(git_dirty)"
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	fi
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	echo "commit = $last_commit" >> "$pkginfo"
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	get_maintainer
	if [ -n "$maintainer" ]; then
		echo "maintainer = $maintainer" >> "$pkginfo"
	fi

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	if [ -n "$replaces_priority" ]; then
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		echo "replaces_priority = $replaces_priority" >> "$pkginfo"
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	fi

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	echo "license = $license" >> "$pkginfo"
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	for i in $replaces; do
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		echo "replaces = $i" >> "$pkginfo"
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	done
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	for i in $deps; do
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		echo "depend = $i" >> "$pkginfo"
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	done
	for i in $provides; do
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		echo "provides = $i" >> "$pkginfo"
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	done
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	for i in $triggers; do
		local f=${i%=*}
		local dirs=${i#*=}
		[ "${f%.trigger}" != "$name" ] && continue
		echo "triggers = ${dirs//:/ }" >> "$pkginfo"
	done
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	if [ -n "$install_if" ]; then
		echo "install_if = $(echo $install_if)" >> "$pkginfo"
	fi
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	local metafiles=".PKGINFO"
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	for i in $install $triggers; do
		local f=${i%=*}
		local n=${f%.*}
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		if [ "$n" != "$name" ]; then
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			continue
		fi
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		script=${f#$name}
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		msg "Adding $script"
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		cp "$startdir/$f" "$controldir/$script" || return 1
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		chmod +x "$controldir/$script"
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		metafiles="$metafiles $script"
	done
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	echo $metafiles | tr ' ' '\n' > "$controldir"/.metafiles
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}
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prepare_trace_rpaths() {
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	local dir=${subpkgdir:-$pkgdir}
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	local etype= soname= file= sover=
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	[ "$arch" = "noarch" ] && return 0
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	options_has "!tracedeps" && return 0
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	# lets tell all the places we should look for .so files - all rpaths
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	scanelf --quiet --recursive --rpath "$dir" \
		| sed -e 's/[[:space:]].*//' -e 's/:/\n/' | sort -u \
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		>"$controldir"/.rpaths
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	if grep -q -x '/usr/lib' "$controldir"/.rpaths; then
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		warning "Redundant /usr/lib in rpath found"
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	fi
	if grep '^/home/' "$controldir"/.rpaths; then
		error "Has /home/... in rpath"
		return 1
	fi
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}

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# search for broken symlinks so we later can pull in proper depends
prepare_symlinks() {
	local dir="${subpkgdir:-$pkgdir}"
	options_has "!tracedeps" && return 0
	cd "$dir" || return 1
	find -type l | while read symlink; do
		if ! [ -e "$symlink" ]; then
			echo "$symlink $(readlink $symlink)" \
				>> "$controldir"/.symlinks
		fi
	done
}

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prepare_pkgconfig_provides() {
	local dir="${subpkgdir:-$pkgdir}"
	options_has "!tracedeps" && return 0
	cd "$dir" || return 1
	for i in usr/lib/pkgconfig/*.pc; do
		if ! [ -e "$i" ]; then
			continue
		fi
		local f=${i##*/}
		local v=$(PKG_CONFIG_PATH="$dir"/usr/lib/pkgconfig pkg-config \
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			--modversion ${f%.pc})
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		echo "${f%.pc}=${v:-0}" >> "$controldir"/.provides-pc
	done
}

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# check if dir has arch specific binaries
dir_has_arch_binaries() {
	local dir="$1"
	# if scanelf returns something, then we have binaries
	[ -n "$(scanelf -R "$dir" | head -n 1)" ] && return 0

	# look for static *.a
	[ -n "$(find "$dir" -type f -name '*.a' | head -n 1)" ] && return 0

	return 1
}

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# returns true if this is the -dev package
is_dev_pkg() {
	test "${subpkgname%-dev}" != "$subpkgname"
}

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# check that noarch is set if needed
archcheck() {
	options_has "!archcheck" && return 0
	if dir_has_arch_binaries "${subpkgdir:-$pkgdir}"; then
		[ "$arch" != "noarch" ] && return 0
		error "Arch specific binaries found so arch must not be set to \"noarch\""
		return 1
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	elif [ "$arch" != "noarch" ] && ! is_dev_pkg; then
		# we dont want -dev package go to noarch
		warning "No arch specific binaries found so arch should probably be set to \"noarch\""
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	fi
	return 0
}

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prepare_package() {
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	msg "Preparing ${subpkgname:+sub}package ${subpkgname:-$pkgname}..."
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	stripbin
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	prepare_metafiles \
		&& prepare_trace_rpaths \
		&& prepare_symlinks \
		&& prepare_pkgconfig_provides \
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		|| return 1
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	archcheck
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}

pkginfo_val() {
	local key="$1"
	local file="$2"
	awk -F ' = ' "\$1 == \"$key\" {print \$2}" "$file"
}

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# find real path to so files
real_so_path() {
	local so="$1"
	shift
	while [ $# -gt 0 ]; do
		[ -e "$1"/$so ] && realpath "$1/$so" && return 0
		shift
	done
	error "$so: path not found"
	return 1
}

# search rpaths and /usr/lib /lib for given so files
find_so_files() {
	local rpaths=$(cat "$1")
	shift
	while [ $# -gt 0 ]; do
		real_so_path "$1" /usr/lib /lib $rpaths || return 1
		shift
	done
	return 0
}

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subpkg_provides_so() {
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	grep -q -w "^$1" "$pkgbasedir"/.control.*/.provides-so 2>/dev/null
}

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subpkg_provides_pc() {
	grep -q -w "^$1" "$pkgbasedir"/.control.*/.provides-pc 2>/dev/null
}

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trace_apk_deps() {
	local name="$1"
	local dir="$2"
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	local i= found= autodeps= deppkgs= missing=
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	msg "Tracing dependencies..."
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	# add pkgconfig if usr/lib/pkgconfig is found
	if [ -d "$pkgbasedir"/$name/usr/lib/pkgconfig ] \
			&& ! grep -q '^depend = pkgconfig' "$dir"/.PKGINFO; then
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		autodeps="$autodeps pkgconfig"
	fi

	# special case for libpthread: we need depend on libgcc
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	if [ "$CLIBC" = "uclibc" ] && [ -f "$dir"/.needs-so ] \
			&& grep -q -w '^libpthread.so.*' "$dir"/.needs-so \
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			&& ! grep -q -w "^depend = libgcc" "$dir"/.PKGINFO; then
		autodeps="$autodeps libgcc"
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		msg "  added libgcc (due to libpthread)"
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	fi
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	[ -f "$dir"/.needs-so ] && for i in $(cat "$dir"/.needs-so); do
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		# first check if its provided by same apkbuild
		grep -q -w "^$i" "$dir"/.provides-so 2>/dev/null && continue

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		if subpkg_provides_so "$i" || cross_compiling \
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				|| $APK info --quiet --installed "so:$i"; then
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			autodeps="$autodeps so:$i"
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		else
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			missing="$missing $i"
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		fi
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	done

	# find all packages that holds the so files
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	if [ -f "$dir"/.rpaths ]; then
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		local so_files=$(find_so_files "$dir"/.rpaths $missing) \
			|| return 1
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		deppkgs=$($APK info --quiet --who-owns $so_files) || return 1
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	fi

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	for found in $deppkgs; do
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		if grep -w "^depend = ${found}$" "$dir"/.PKGINFO >/dev/null ; then
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			warning "You can remove '$found' from depends"
			continue
		fi
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		autodeps="$autodeps $found"
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	done
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	# symlink targets
	for i in $(sort -u "$dir"/.symlinks-needs 2>/dev/null); do
		autodeps="$autodeps $i"
	done

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	# pkg-config depends
	for i in $(sort -u "$dir"/.needs-pc 2>/dev/null); do
		if subpkg_provides_pc "$i" || cross_compiling \
				|| $APK info --quiet --installed "pc:$i"; then
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			local provider=$(apk search --quiet "pc:$i")
			if list_has "$provider" $depends_dev; then
				warning "$provider should be removed from depends_dev"
			fi
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			autodeps="$autodeps pc:$i"
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		else
			warning "Could not find any provider for pc:$i"
			local pcfile=/usr/lib/pkgconfig/"${i%%[<>=]*}".pc
			if [ -e "$pcfile" ]; then
				local owner=$($APK info --quiet --who-owns $pcfile)
				warning "${owner:-package providing $pcfile} needs to be rebuilt"
			fi
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		fi
	done

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	echo "# automatically detected:" >> "$dir"/.PKGINFO
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	if [ -f "$dir"/.provides-so ]; then
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		sed 's/^\(.*\) \([0-9].*\)/provides = so:\1=\2/' "$dir"/.provides-so \
1078
			>> "$dir"/.PKGINFO