#!/bin/sh

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

program_version=@VERSION@
sysconfdir=@sysconfdir@
abuildrepo_base=@abuildrepo@
datadir=@datadir@

abuild_path=$(readlink -f $0)

if ! [ -f "$datadir/functions.sh" ]; then
	echo "$datadir/functions.sh: not found" >&2
	exit 1
fi
. "$datadir/functions.sh"

# defaults
BUILD_BASE="build-base"

: ${FAKEROOT:="fakeroot"}
: ${SUDO_APK:="abuild-apk"}
: ${APK:="apk"}
: ${ADDUSER:="abuild-adduser"}
: ${ADDGROUP:="abuild-addgroup"}

apk_opt_wait="--wait 30"

# run optional log command for remote logging
logcmd() {
	${ABUILD_LOG_CMD:-true} "$@"
	return 0
}

# we override the default msg, warning and error as we want the pkgname
msg() {
	[ -n "$quiet" ] && return 0
	local prompt="$GREEN>>>${NORMAL}"
	local fake="${FAKEROOTKEY:+${BLUE}*${NORMAL}}"
	local name="${STRONG}${subpkgname:-$pkgname}${NORMAL}"
	printf "${prompt} ${name}${fake}: %s\n" "$1" >&2
}

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

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

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

cleanup() {
	local i=
	set_xterm_title ""
	if [ -n "$CLEANUP_FILES" ]; then
		rm -f $CLEANUP_FILES
	fi
	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..."
				$SUDO_APK del --quiet $apk_opt_wait $uninstall_after
				if cross_compiling; then
					$SUDO_APK del --root "$CBUILDROOT" \
						--quiet $apk_opt_wait \
						$uninstall_after
				fi
			fi
			;;
		esac
	done
}

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

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

# check if apkbuild is basicly sane
default_sanitycheck() {
	local i= j= suggestion=
	msg "Checking sanity of $APKBUILD..."
	[ -z "$pkgname" ] && die "Missing pkgname in APKBUILD"
	[ -z "${pkgname##* *}" ] && die "pkgname contains spaces"
	[ -z "$pkgver" ] && die "Missing pkgver in APKBUILD"
	if [ "$pkgver" != "volatile" ] && [ -z "$nodeps" ]; then
		$APK version --check --quiet "$pkgver" ||\
			die "$pkgver is not a valid version"
	fi
	[ -z "$pkgrel" ] && die "Missing pkgrel in APKBUILD"
	[ -z "$pkgdesc" ] && die "Missing pkgdesc in APKBUILD"
	[ -z "$url" ] && die "Missing url in APKBUILD"
	[ -z "$license" ] && die "Missing license in APKBULID"
	if [ $(echo "$pkgdesc" | wc -c) -gt 128 ]; then
		die "pkgdesc is too long"
	fi
	is_function package || warning "Missing package() function in APKBUILD"

	if [ -n "$replaces_priority" ] \
		&& ! echo $replaces_priority | egrep -q '^[0-9]+$'; then
		die "replaces_priority must be a number"
	fi
	# 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

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

	if [ -z "$CARCH" ]; then
		die "Please fix CHOST, or set CARCH in abuild.conf"
	fi

	for i in $install; do
		local n=${i%.*}
		local suff=${i##*.}
		case "$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
			die "$i: install script does not match pkgname or any subpackage"
		fi
		[ -e "$startdir/$i" ] || die "install script $i is missing"
		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
	done

	for i in $triggers; do
		local f=${i%=*}
		local p=${f%.trigger}
		[ "$f" = "$i" ] && die "$f: triggers must contain '='"
		[ "$p" = "$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

		[ -e "$startdir"/$f ] || die "trigger script $f is missing"
	done
	if [ -n "$source" ]; then
		for i in $source; do
			if install_has "$i"; then
				warning "You should not have \$install in source"
				continue
			fi
			case "$i" in
				*::*) i=${i%%::*};;
				https://*) makedepends_has wget && warning "wget no longer need to be in makedepends when source has https://" ;;
			esac
			list_has ${i##*/} $md5sums $sha256sums $sha512sums \
				|| die "${i##*/} is missing in checksums"

			# 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
		done
	fi

	# 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"
		done
	done

	# common spelling errors
	[ -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

	check_maintainer || die "Provide a valid RFC822 maintainer address"

	makedepends_has 'g++' && warning "g++ should not be in makedepends"
	return 0
}

sanitycheck() {
	default_sanitycheck
}

sumcheck() {
	local algo="$1" sums="$2"
	local dummy f endreturnval originalparams origin file

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

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

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

# verify upstream sources
sourcecheck() {
	local uri
	for uri in $source; do
		is_remote $uri || continue
		case "$uri" in
		saveas-*://*)
			uri=${uri#saveas-}
			uri=${uri%/*}
			;;
		*::*)
			uri=${uri##*::}
			;;
		esac
		wget -q -s "$uri" || return 1
	done
	return 0
}

uri_fetch() {
	local uri="$1"
	[ -n "$quiet" ] && opts="-s"

	mkdir -p "$SRCDEST"
	abuild-fetch -d "$SRCDEST" "$uri"
}

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

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

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

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

fetch() {
	default_fetch
}

# verify that all init.d scripts are openrc runscripts
initdcheck() {
	local i line
	for i in $source; do
		case $i in
		*.initd) line=$(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"
			return 1
			;;
		esac
	done
}

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

unpack() {
	default_unpack
}

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

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

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

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

# clean all packages except current
cleanoldpkg() {
	local i j
	getpkgver || return 1
	msg "Cleaning all packages except $pkgver-r$pkgrel..."
	for i in $(listpkgnames); do
		local pn=${i%:*}
		for j in "$PKGDEST"/$pn-[0-9]*.apk ; do
			[ "$j" = "$PKGDEST/$pn-$pkgver-r$pkgrel.apk" ] \
				&& continue
			rm -f "$j" "$abuildrepo"/*/${j##*/}
		done
	done
	update_abuildrepo_index
	return 0
}

mkusers() {
	local i
	for i in $pkggroups; do
		if ! getent group $i >/dev/null; then
			msg "Creating group $i"
			$ADDGROUP -S $i || return 1
		fi
	done
	for i in $pkgusers; do
		if ! getent passwd $i >/dev/null; then
			local gopt=
			msg "Creating user $i"
			if getent group $i >/dev/null; then
				gopt="-G $i"
			fi
			$ADDUSER -S -D -H $gopt $i || return 1
		fi
	done
}

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

runpart() {
	local part=$1
	[ -n "$DEBUG" ] && msg "$part"
	$part || die "$part failed"
}

# override those in your build script
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
}

prepare() {
	:
}

build() {
	:
}

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

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
}

postcheck() {
	local dir="$1" name="$2" i=
	msg "Running postcheck for $name"
	# checking for FHS compat
	if ! options_has "!fhs"; then
		for i in "$dir"/srv/* "$dir"/usr/local/* "$dir"/opt/*; do
			if [ -e "$i" ]; then
				error "Packages must not put anything under /srv, /usr/local or /opt"
				return 1
			fi
		done
		if [ -d "$dir"/usr/var ]; then
			error "Found /usr/var, localstatedir is most likely wrong"
			return 1
		fi
	fi

	# remove *.la files if libtool is not set
	if ! options_has "libtool"; then
		find "$dir" -name '*.la' -type f -delete
	fi

	# look for /usr/lib/charset.alias
	if [ -e "$dir"/usr/lib/charset.alias ] \
			&& ! options_has "charset.alias"; then
		error "Found /usr/lib/charset.alias"
		return 1
	fi
	# look for /usr/share/doc
	if [ -e "$dir"/usr/share/doc ] \
			&& ! is_doc_pkg "$name"; then
		warning "Found /usr/share/doc but package name doesn't end with -doc"
	fi
	# look for /usr/share/man
	if [ -e "$dir"/usr/share/man ]; then
		if ! is_doc_pkg "$name"; then
			warning "Found /usr/share/man but package name doesn't end with -doc"
		fi
		# check for uncompressed man pages
		i=$(find "$dir"/usr/share/man -name '*.[0-9]' -type f | sed "s|^$dir|\t|")
		if [ -n "$i" ]; then
			error "Found uncompressed man pages:"
			echo "$i"
			return 1
		fi
	fi
	# check directory permissions
	i=$(find "$dir" -type d -perm -777 | sed "s|^$dir|\t|")
	if [ -n "$i" ]; then
		warning "World writeable directories found:"
		echo "$i"
	fi
	# check so we dont have any suid root binaries that are not PIE
	i=$(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 "$i"
		return 1
	fi
	# test suid bit on executable
	if ! options_has "suid"; then
		i=$(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

	# 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
	return 0
}

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

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

default_lang() {
	pkgdesc="Languages for package $pkgname"
	install_if="$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
}

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

lang_subpkg() {
	default_lang_subpkg
}

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
}

# 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}'
}

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

check_maintainer() {
	get_maintainer
	if [ -z "$maintainer" ]; then
		warning "No maintainer"
	else
		# try to check for a valid rfc822 address
		case "$maintainer" in
			*[A-Za-z0-9]*\ \<*@*.*\>) ;;
			*) return 1 ;;
		esac
	fi
}

prepare_metafiles() {
	getpkgver || return 1
	local name=${subpkgname:-$pkgname}
	[ -z "${name##* *}" ] && die "package name contains spaces"
	local dir=${subpkgdir:-$pkgdir}
	local pkg="$name-$pkgver-r$pkgrel.apk"
	local pkginfo="$controldir"/.PKGINFO
	local sub

	[ ! -d "$dir" ] && die "Missing $dir"
	cd "$dir"
	mkdir -p "$controldir"
	local builddate=$(date -u "+%s")
	local size=$(du -sk | awk '{print $1 * 1024}')
	local parch="$CARCH"

	# we need to wait with setting noarch til our build infra can handle it
#	if [ "$arch" = "noarch" ]; then
#		parch="noarch"
#	fi

	# save arch incase subpackages set it different than main pkg
	if [ "${apkbuild_arch:-$arch}" != "$arch" ]; then
		echo "$arch" > "$controldir"/.arch
	fi

	echo "# Generated by $(basename $0) $program_version" >"$pkginfo"
	if [ -n "$FAKEROOTKEY" ]; then
		echo "# using $($FAKEROOT -v)" >> "$pkginfo"
	fi
	echo "# $(date -u)" >> "$pkginfo"
	cat >> "$pkginfo" <<EOF
pkgname = $name
pkgver = $pkgver-r$pkgrel
pkgdesc = $pkgdesc
url = $url
builddate = $builddate
packager = ${PACKAGER:-"Unknown"}
size = $size
arch = $parch
origin = $pkgname
EOF
	local i deps
	deps="$depends"
	if [ "$pkgname" != "busybox" ] && ! depends_has busybox; then
		for i in $install $triggers; do
			local s=${i%=*}
			[ "$name" != "${s%.*}" ] && continue
			if head -n 1 "$startdir/$s" | grep '^#!/bin/sh' >/dev/null ; then
				msg "Script found. busybox added as a dependency for $pkg"
				deps="$deps busybox"
				break
			fi
		done
	fi

	# store last_commit in global var so we only call git once
	if [ -z "$last_commit" ]; then
		last_commit="$(git_last_commit)$(git_dirty)"
	fi
	echo "commit = $last_commit" >> "$pkginfo"

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

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

	echo "license = $license" >> "$pkginfo"
	for i in $replaces; do
		echo "replaces = $i" >> "$pkginfo"
	done
	for i in $deps; do
		echo "depend = $i" >> "$pkginfo"
	done
	for i in $provides; do
		echo "provides = $i" >> "$pkginfo"
	done
	for i in $triggers; do
		local f=${i%=*}
		local dirs=${i#*=}
		[ "${f%.trigger}" != "$name" ] && continue
		echo "triggers = ${dirs//:/ }" >> "$pkginfo"
	done
	if [ -n "$install_if" ]; then
		echo "install_if = $(echo $install_if)" >> "$pkginfo"
	fi

	local metafiles=".PKGINFO"
	for i in $install $triggers; do
		local f=${i%=*}
		local n=${f%.*}
		if [ "$n" != "$name" ]; then
			continue
		fi
		script=${f#$name}
		msg "Adding $script"
		cp "$startdir/$f" "$controldir/$script" || return 1
		chmod +x "$controldir/$script"
		metafiles="$metafiles $script"
	done
	echo $metafiles | tr ' ' '\n' > "$controldir"/.metafiles
}

prepare_trace_rpaths() {
	local dir=${subpkgdir:-$pkgdir}
	local etype= soname= file= sover=
	[ "$arch" = "noarch" ] && return 0
	options_has "!tracedeps" && return 0
	# lets tell all the places we should look for .so files - all rpaths
	scanelf --quiet --recursive --rpath "$dir" \
		| sed -e 's/[[:space:]].*//' -e 's/:/\n/' | sort -u \
		>"$controldir"/.rpaths
	if grep -q -x '/usr/lib' "$controldir"/.rpaths; then
		warning "Redundant /usr/lib in rpath found"
	fi
	if grep '^/home/' "$controldir"/.rpaths; then
		error "Has /home/... in rpath"
		return 1
	fi
}

# 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
}

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 \
			--modversion ${f%.pc})
		echo "${f%.pc}=${v:-0}" >> "$controldir"/.provides-pc
	done
}

# 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
}

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

# returns true if this is the -doc package
is_doc_pkg() {
	test "${1%-doc}" != "$1"
}

# check that noarch is set if needed
archcheck() {
	options_has "!archcheck" && return 0
	if dir_has_arch_binaries "${subpkgdir:-$pkgdir}"; then
		[ "$arch" != "noarch" ] && return 0
		error "Arch specific binaries found so arch must not be set to \"noarch\""
		return 1
	elif [ "$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\""
	fi
	return 0
}

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

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

# 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
}

subpkg_provides_prefixed_so() {
	[ -n "$sonameprefix" ] && grep -q -w "^$sonameprefix$1" \
		"$pkgbasedir"/.control.*/.provides-so 2>/dev/null
}

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

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

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

	# special case for libpthread: we need depend on libgcc
	if [ "$CLIBC" = "uclibc" ] && [ -f "$dir"/.needs-so ] \
			&& grep -q -w '^libpthread.so.*' "$dir"/.needs-so \
			&& ! grep -q -w "^depend = libgcc" "$dir"/.PKGINFO; then
		autodeps="$autodeps libgcc"
		msg "  added libgcc (due to libpthread)"
	fi

	[ -f "$dir"/.needs-so ] && for i in $(cat "$dir"/.needs-so); do
		# first check if its provided by same apkbuild
		grep -q -w "^$sonameprefix$i" "$dir"/.provides-so 2>/dev/null && continue

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

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

	for found in $deppkgs; do
		if grep -w "^depend = ${found}$" "$dir"/.PKGINFO >/dev/null ; then
			warning "You can remove '$found' from depends"
			continue
		fi
		autodeps="$autodeps $found"
	done

	# symlink targets
	for i in $(sort -u "$dir"/.symlinks-needs 2>/dev/null); do
		autodeps="$autodeps $i"
	done

	# 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
			local provider=$(apk search --quiet "pc:$i")
			if list_has "$provider" $depends_dev; then
				warning "$provider should be removed from depends_dev"
			fi
			autodeps="$autodeps pc:$i"
		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
		fi
	done

	echo "# automatically detected:" >> "$dir"/.PKGINFO
	if [ -f "$dir"/.provides-so ]; then
		sed 's/^\(.*\) \([0-9].*\)/provides = so:\1=\2/' "$dir"/.provides-so \
			>> "$dir"/.PKGINFO
	fi
	if [ -f "$dir"/.provides-pc ]; then
		sed 's/^/provides = pc:/' "$dir"/.provides-pc | sort -u \
			>> "$dir"/.PKGINFO
	fi
	[ -z "$autodeps" ] && return 0
	for i in $autodeps; do
		echo "depend = $i"
	done | sort -u >> "$dir"/.PKGINFO
	# display all depends
	sed -n '/^depend =/s/depend = /\t/p' "$dir"/.PKGINFO >&2
}

find_scanelf_paths() {
	local datadir="$1"
	local paths="$datadir/lib:$datadir/usr/lib" i= rpaths=
	if [ -n "$ldpath" ]; then
		paths="$paths:$(echo "${datadir}${ldpath}" | sed "s|:|:$datadir|g")"
	fi
	# search in all rpaths
	for rpaths in "$pkgbasedir"/.control.*/.rpaths; do
		[ -f "$rpaths" ] || continue
		while read i; do
			local dir="${datadir}${i}"
			IFS=:
			if [ -d "$dir" ] && ! list_has "$dir" $paths; then
				paths="$paths:${dir}"
			fi
			unset IFS
		done < "$rpaths"
	done
	echo "$paths"
}

scan_shared_objects() {
	local name="$1" controldir="$2" datadir="$3"
	local opt= i=

	if [ "$arch" = "noarch" ] && ! [ -e "$controldir"/.arch ]; then
		return 0
	fi

	# allow spaces in paths
	IFS=:
	set -- $(find_scanelf_paths "$datadir")
	unset IFS

	# sanity check, verify that each path is prefixed with datadir
	for i; do
		if [ "${i#$datadir}" = "$i" ]; then
			error "Internal error in scanelf paths"
			return 1
		fi
	done

	if options_has "ldpath-recursive"; then
		opt="--recursive"
	fi
	msg "Scanning shared objects"
	# lets tell all the .so files this package provides in .provides-so
	scanelf --nobanner --soname $opt "$@" | while read etype soname file; do
		# if soname field is missing, soname will be the filepath
		sover=0
		if [ -z "$file" ]; then
			file="$soname"
			soname=${soname##*/}
		fi

		# we only want shared libs
		case $soname in
		*.so|*.so.[0-9]*|*.c32);;
		*) continue;;
		esac

		case "$file" in
		*.so.[0-9]*) sover=${file##*.so.};;
		*.so)
			# filter out sonames with version when file does not
			# have version
			case "$soname" in
			*.so.[0-9]*)
				if options_has "sover-namecheck"; then
					continue
				fi
			esac
			;;
		esac
		list_has "$soname" $somask && continue
		echo "$sonameprefix$soname $sover"
	# use awk to filter out dupes that has sover = 0
	done | awk '{ if (so[$1] == 0) so[$1] = $2; }
		END { for (i in so) print(i " " so[i]); }' \
		| sort -u > "$controldir"/.provides-so

	# verify that we dont have any duplicates
	local dupes="$(cut -d' ' -f1 "$controldir"/.provides-so | uniq -d)"
	if [ -n "$dupes" ]; then
		die  "provides multiple versions of same shared object: $dupes"
	fi

	# now find the so dependencies
	scanelf --nobanner --recursive --needed "$datadir"  | tr ' ' ':' \
		| awk -F ":" '$2 != "" && ($1 == "ET_DYN" || $1 == "ET_EXEC") {print $2}'  \
		| sed 's:,:\n:g' | sort -u \
	| while read soname; do
		# only add files that are not self provided
		grep -q -w "^$sonameprefix$soname" "$controldir"/.provides-so \
			|| list_has "$soname" $somask \
			|| echo $soname
	done > "$controldir"/.needs-so
}

# normalize a path string
normalize_path() {
	local oifs="$IFS" pathstr= i=
	IFS='/'
	set -- $1
	for i; do
		case "$i" in
		"."|"") continue;;
		"..")   pathstr="${pathstr%%/${pathstr##*/}}";;
		*) pathstr="${pathstr}/$i";;
		esac
	done
	echo "$pathstr"
}

# find which package provides file that symlink points to
scan_symlink_targets() {
	local name="$1" dir="$2" datadir="$3"
	local symfile= targetpath=
	cd "$datadir"
	for symfile in "$pkgbasedir"/.control.*/.symlinks; do
		local d="${symfile%/.symlinks}"
		if ! [ -e "$symfile" ] || [ "$d" = "$dir" ]; then
			continue
		fi

		while read symlink target; do
			if [ "${target#/}" = "$target" ]; then
				target="${symlink%/*}/$target"
			fi
			targetpath="$datadir"/$(normalize_path "$target")
			if [ -e "$targetpath" ] || [ -L "$targetpath" ]; then
				echo "$name=$pkgver-r$pkgrel" \
					>> "$d"/.symlinks-needs
			fi
		done < "$symfile"
	done
}

#find pkg-config dependencies
scan_pkgconfig_depends() {
	local provides_pc="$1" controldir= name= datadir=
	[ -e "$provides_pc" ] || return 0
	controldir="${provides_pc%/*}"
	name="$(pkginfo_val pkgname "$controldir"/.PKGINFO)"
	datadir="$pkgbasedir"/$name
	for i in $(sort -u "$provides_pc"); do
		PKG_CONFIG_PATH="$datadir"/usr/lib/pkgconfig pkg-config \
				--print-requires \
				--print-requires-private ${i%=*} \
				| sed -E 's/\s*([<>=]+)\s*/\1/' \
				| while read pc; do
			# only add files that are not self provided
			if ! grep -q -w "^${pc%%[<>=]*}" "$provides_pc"; then
				echo "$pc" >> "$controldir"/.needs-pc
			fi
		done
	done
}

# read size in bytes from stdin and show as human readable
human_size() {
	awk '{  split("B KB MB GB TB PB", type)
		for(i=5; y < 1; i--)
			y = $1 / (2**(10*i))
		printf("%.1f %s\n", y, type[i+2]) }'
}

create_apks() {
	local file= dir= name= ver= apk= datadir= size=
	getpkgver || return 1
	mkdir -p "$PKGDEST"
	if ! options_has "!tracedeps"; then
		for file in "$pkgbasedir"/.control.*/.PKGINFO; do
			dir="${file%/.PKGINFO}"
			name="$(pkginfo_val pkgname $file)"
			datadir="$pkgbasedir"/$name
			subpkgname=$name
			scan_shared_objects "$name" "$dir" "$datadir"
			scan_symlink_targets "$name" "$dir" "$datadir"
		done
		for file in "$pkgbasedir"/.control.*/.provides-pc; do
			scan_pkgconfig_depends "$file"
		done
	fi

	for file in "$pkgbasedir"/.control.*/.PKGINFO; do
		dir="${file%/.PKGINFO}"
		name=$(pkginfo_val pkgname $file)
		ver=$(pkginfo_val pkgver $file)
		size=$(pkginfo_val size $file | human_size)
		apk=$name-$ver.apk
		datadir="$pkgbasedir"/$name
		subpkgname=$name

		trace_apk_deps "$name" "$dir" || return 1
		msg "Package size: ${size}"
		msg "Compressing data..."
		(
		cd "$datadir"
		# data.tar.gz
		set -- *
		if [ "$1" = '*' ]; then
			touch .dummy
			set -- .dummy
		fi
		tar --xattrs -c "$@" | abuild-tar --hash | gzip -9 >"$dir"/data.tar.gz

		msg "Create checksum..."
		# append the hash for data.tar.gz
		local sha256=$(sha256sum "$dir"/data.tar.gz | cut -f1 -d' ')
		echo "datahash = $sha256" >> "$dir"/.PKGINFO

		# control.tar.gz
		cd "$dir"
		tar -c $(cat "$dir"/.metafiles) | abuild-tar --cut \
			| gzip -9 > control.tar.gz
		abuild-sign -q control.tar.gz || exit 1

		msg "Create $apk"
		# create the final apk
		cat control.tar.gz data.tar.gz > "$PKGDEST"/$apk
		)
	done
	subpkgname=
}

clean_abuildrepo() {
	local apk
	cd "$abuildrepo" || return 1

	# remove compat symlink
	for d in "$abuildrepo/$CARCH"; do
		[ -L "$d" ] && rm "$d"
	done

	# remove broken links from abuildrepo
	for apk in *.apk */*.apk; do
		if [ -L "$apk" ] && [ ! -f "$apk" ]; then
			rm -f "$apk"
		fi
	done
}

mklinks_abuildrepo() {
	[ -n "$REPODEST" ] && return 0
	local apk
	mkdir -p "$abuildrepo"/$CARCH
	cd "$abuildrepo" || return 1
	# create links for this package
	for apk in $(listpkg); do
		[ -f "$PKGDEST"/$apk ] || continue
		ln -sf "$PKGDEST"/$apk "$abuildrepo"/$CARCH/$apk
	done
}

build_abuildrepo() {
	local d apk _build=build
	if ! is_function package; then
		# if package() is missing then build is called from rootpkg
		_build=true
	fi
	if ! apk_up2date || [ -n "$force" ]; then
		# check early if we have abuild key
		abuild-sign --installed || return 1
		logcmd "building ${abuildrepo##*/}/$pkgname-$pkgver-r$pkgrel"
		sanitycheck && builddeps && clean && fetch && unpack \
			&& prepare && mkusers && $_build && rootpkg \
			&& cleanup $CLEANUP \
			|| return 1
	fi
	update_abuildrepo_index
}

update_abuildrepo_index() {
	clean_abuildrepo
	mklinks_abuildrepo

	cd "$abuildrepo"
	local index=$CARCH/APKINDEX.tar.gz

	msg "Updating the cached abuild repository index..."
	local sign=".SIGN.RSA.${SIGN_PUBLIC_KEY##*/}"
	local oldindex=
	if [ -f "$index" ]; then
		oldindex="--index $index"
	fi
	$APK index --quiet $oldindex --output "$index".unsigned \
		--description "$repo $(cd $startdir && git describe)" \
		--rewrite-arch $CARCH \
		$CARCH/*.apk || exit 1
	msg "Signing the index..."
	abuild-sign -q "$index".unsigned || exit 1
	mv "$index".unsigned "$index"
	chmod 644 "$index"
}

# predefined splitfunc doc
default_doc() {
	depends="$depends_doc"
	pkgdesc="$pkgdesc (documentation)"
	arch=${arch_doc:-"noarch"}
	install_if="docs $pkgname=$pkgver-r$pkgrel"

	local i
	for i in doc man info html sgml licenses gtk-doc ri help; do
		if [ -d "$pkgdir/usr/share/$i" ]; then
			mkdir -p "$subpkgdir/usr/share"
			mv "$pkgdir/usr/share/$i" "$subpkgdir/usr/share/"
		fi
	done

	# compress man pages
	local previnode= prevname=  mandir="$subpkgdir"/usr/share/man
	[ -d "$mandir" ] && find "$subpkgdir"/usr/share/man \
		-type f \( -name \*.[0-9n] -o -name \*.[0-9][a-z]* \) \
		-exec stat -c "%i %n" {} \; | sort -n \
		| while read inode name; do

		if [ "$inode" = "$previnode" ]; then
			# update hard link
			rm "$name"
			ln "$prevname".gz "$name".gz
		else
			gzip -9 "$name"
		fi

		previnode="$inode"
		prevname="$name"
	done
	[ -d "$mandir" ] && find "$subpkgdir"/usr/share/man \
		-type l \( -name \*.[0-9n] -o -name \*.[0-9][a-z]* \) \
		| while read symlink; do

		ln -s $(readlink $symlink).gz "$symlink".gz
		rm "$symlink"
	done

	rm -f "$subpkgdir/usr/share/info/dir"

	# remove if empty, ignore error (not empty)
	rmdir "$pkgdir/usr/share" "$pkgdir/usr" 2>/dev/null

	return 0
}

doc() {
	default_doc
}

# predefined splitfunc doc
default_dbg() {
	local f
	binfiles=$(scanelf -R "$pkgdir" | grep ET_DYN | sed "s:$pkgdir\/::g" | sed "s:ET_DYN ::g")
	for f in $binfiles; do
		srcdir=$(dirname $pkgdir/$f)
		srcfile=$(basename $pkgdir/$f)
		dstdir=$(dirname $subpkgdir/usr/lib/debug/$f.debug)
		dstfile=$(basename $subpkgdir/usr/lib/debug/$f.debug)
		if [ ! -d $dstdir ] ; then
			mkdir -p $dstdir
		fi
		cd $srcdir
		objcopy --only-keep-debug $srcfile $dstfile
		objcopy --add-gnu-debuglink=$dstfile $srcdir/$srcfile
		mv $dstfile $dstdir
		strip $srcfile
	done
	return 0
}

dbg() {
	default_dbg
}

# predefined splitfunc dev
default_dev() {
	local i= j=
	depends="$depends_dev"
	pkgdesc="$pkgdesc (development files)"

	cd "$pkgdir" || return 0
	local libdirs=usr/
	[ -d lib/ ] && libdirs="lib/ $libdirs"
	for i in usr/include usr/lib/pkgconfig usr/share/aclocal\
			usr/share/gettext usr/bin/*-config	\
			usr/share/vala/vapi usr/share/gir-[0-9]*\
			usr/share/qt*/mkspecs			\
			usr/lib/qt*/mkspecs			\
			usr/lib/cmake				\
			$(find . -name include -type d) 	\
			$(find $libdirs -name '*.[acho]' \
				-o -name '*.prl' 2>/dev/null); do
		if [ -e "$pkgdir/$i" ] || [ -L "$pkgdir/$i" ]; then
			d="$subpkgdir/${i%/*}"	# dirname $i
			mkdir -p "$d"
			mv "$pkgdir/$i" "$d"
			rmdir "$pkgdir/${i%/*}" 2>/dev/null
		fi
	done
	# move *.so links needed when linking the apps to -dev packages
	for i in lib/*.so usr/lib/*.so; do
		if [ -L "$i" ]; then
			mkdir -p "$subpkgdir"/"${i%/*}"
			mv "$i" "$subpkgdir/$i" || return 1
		fi
	done
	return 0
}

dev() {
	default_dev
}

# predefined splitfunc libs
default_libs() {
	pkgdesc="$pkgdesc (libraries)"
	local dir= file=
	for dir in lib usr/lib; do
		for file in "$pkgdir"/$dir/lib*.so.[0-9]*; do
			[ -f "$file" ] || continue
			mkdir -p "$subpkgdir"/$dir
			mv "$file" "$subpkgdir"/$dir/
		done
	done
}

libs() {
	default_libs
}

is_function() {
	type "$1" 2>&1 | head -n 1 | egrep -q "is a (shell )?function"
}

do_fakeroot() {
	if [ -n "$FAKEROOT" ]; then
		$FAKEROOT -- "$@"
	else
		"$@"
	fi
}

# build and package in fakeroot
rootpkg() {
	local _package=package
	if ! is_function package; then
		# if package() is missing then run 'build' in fakeroot instead
		warning "No package() function in APKBUILD"
		_package=build
	fi
	cd "$startdir"
	rm -rf "$pkgdir"
	[ -n "$FAKEROOT" ] && msg "Entering fakeroot..."
	do_fakeroot "$abuild_path" $color_opt \
		$_package \
		prepare_subpackages \
		prepare_language_packs \
		prepare_package \
		create_apks
}

srcpkg() {
	getpkgver || return 1
	local p="$pkgname-$pkgver-$pkgrel"
	local prefix="${startdir##*/}"
	local i files="$prefix/APKBUILD"
	for i in $source; do
		files="$files $prefix/$(filename_from uri $i)"
	done
	mkdir -p "$PKGDEST"
	msg "Creating source package $p.src.tar.gz..."
	(cd .. && tar -zcf "$PKGDEST/$p.src.tar.gz" $files)
}

# return true if arch is supported or noarch
check_arch() {
	list_has $CARCH $arch || [ "$arch" = "noarch" ] || [ "$arch" = "all" ]
}

# return true if libc is not masked in options
check_libc() {
	! list_has "!libc_$CLIBC" $options
}

# check if package is up to date
apk_up2date() {
	getpkgver || return 1
	local pkg="$PKGDEST/$pkgname-$pkgver-r$pkgrel.apk"
	local i s
	cd "$startdir"
	for i in $pkgname $subpackages; do
		[ -f "$PKGDEST/$pkgname-$pkgver-r$pkgrel.apk" ] || return 1
	done
	[ -n "$keep" ] && return 0

	for i in $source APKBUILD; do
		local s
		if is_remote "$i"; then
			s="$SRCDEST/$(filename_from_uri $i)"
		else
			s="$startdir/${i##*/}"
		fi
		if [ "$s" -nt "$pkg" ]; then
			return 1
		fi
	done
	return 0
}

abuildindex_up2date() {
	local i
	getpkgver || return 1
	local dir="$abuildrepo"/$CARCH
	local apk="${pkgname%:*}-$pkgver-r$pkgrel.apk"
	local idx="$dir"/APKINDEX.tar.gz
	local file="$dir"/$apk

	# check if index is missing
	[ -f "$idx" ] || return 1

	# if link or file is missing, then we need update abuildrepo index
	[ -f "$file" ] || return 1

	# if file exists and is newer than index, then we need update index
	[ "$file" -nt "$idx" ] && return 1

	return 0
}

up2date() {
	check_arch || return 0
	check_libc || return 0
	apk_up2date && abuildindex_up2date
}

# rebuild package and abuildrepo index if needed
abuildindex() {
	up2date && return 0
	build_abuildrepo
}

# source all APKBUILDs and output:
#  1) origin of package
#  2) all dependencies
# the output is i in a format easy parseable for awk
parse_aports_makedepends() {
	# lets run this in a subshell since we source all APKBUILD here
	(
	aportsdir=$(realpath ${APKBUILD%/APKBUILD}/..)
	for i in $aportsdir/*/APKBUILD; do
		# no forks in this loop or it will be painfully slow!
		pkgname=
		subpackages=
		depends=
		makedepends=
		. $i
		dir=${i%/APKBUILD}
		deps=
		# filter out conflicts from deps and version info
		for j in $depends $makedepends; do
			case "$j" in
				!*) continue;;
			esac
			deps="$deps ${j%%[<>=]*}"
		done
		for j in $pkgname $subpackages; do
			echo "o ${j%%:*} $dir"
			set -- $deps
			echo -n "d ${j%%:*} $1"
			shift
			while [ $# -gt 0 ]; do
				echo -n ",$1"
				shift
			done
			echo
		done
	done
	)
}

trace_makedepends() {
	local deps= i=
	# strip versions from deps
	for i in "$@"; do
		deps="$deps ${i%%[<>=]*}"
	done
	[ -z "$deps" ] && return 0
	(	parse_aports_makedepends
		if [ -z "$upgrade" ]; then
			# list installed pkgs and prefix with 'i '
			$APK info --quiet | sort |  sed 's/^/i /'
		fi
	) | awk -v pkgs="$deps" '

	function depgraph(pkg,	a, i) {
		if (visited[pkg])
			return 0;
		visited[pkg] = 1;
		split(deps[pkg], a, ",");
		for (i in a)
			depgraph(a[i]);
		print pkg ":" origin[pkg];

	}

	$1 == "i" { visited[$2] = 1 }
	$1 == "o" { origin[$2] = $3 }
	$1 == "d" { deps[$2] = $3 }
	END {
		split(pkgs, pkgarray);
		for (i in pkgarray)
			depgraph(pkgarray[i]);
	}
	'
}

# build and install dependencies
builddeps() {
	local pkg= i= missing=
	local hostdeps= builddeps= installed_hostdeps= installed_builddeps=
	[ -n "$nodeps" ] && return 0
	msg "Analyzing dependencies..."

	# add depends unless it is a subpackage or package itself
	if cross_compiling && [ -n "$makedepends_build" -o -n "$makedepends_host" ]; then
		builddeps="$makedepends_build"
		for i in $BUILD_BASE; do
			[ "$pkgname" = "${i%%[<>=]*}" ] && continue
			subpackages_has ${i%%[<>=]*} || builddeps="$builddeps $i"
		done
		hostdeps="$makedepends_host"
		for i in $depends; do
			[ "$pkgname" = "${i%%[<>=]*}" ] && continue
			subpackages_has ${i%%[<>=]*} || hostdeps="$hostdeps $i"
		done
	else
		builddeps="$makedepends"
		for i in $BUILD_BASE $depends; do
			[ "$pkgname" = "${i%%[<>=]*}" ] && continue
			subpackages_has ${i%%[<>=]*} || builddeps="$builddeps $i"
		done
	fi

	installed_builddeps=$($APK info --installed $builddeps)
	[ -n "$hostdeps" ] && installed_hostdeps=$($APK info --root "$CBUILDROOT" --installed $hostdeps)

	# find which deps are missing
	for i in $builddeps; do
		if [ "${i#\!}" != "$i" ] && $APK info --quiet --installed "${i#\!}"; then
			error "Conflicting package installed: ${i#\!}"
		elif ! deplist_has $i $installed_builddeps || [ -n "$upgrade" ]; then
			missing="$missing $i"
		fi
	done
	for i in $hostdeps; do
		if [ "${i#\!}" != "$i" ] && $APK info --quiet --installed --root "$CBUILDROOT" "${i#\!}"; then
			error "Conflicting package installed: ${i#\!}"
		elif ! deplist_has $i $installed_hostdeps || [ -n "$upgrade" ]; then
			missing="$missing $i"
		fi
	done

	if [ -z "$install_deps" ] && [ -z "$recursive" ]; then
		# if we dont have any missing deps we are done now
		[ -z "$missing" ] && return 0
		error "Missing dependencies: $missing Use -r to autoinstall or -R to build"
		return 1
	fi

	uninstall_after=".makedepends-$pkgname $uninstall_after"
	if [ -n "$install_deps" ] && [ -z "$recursive" ]; then
		# make a --simulate run first to detect missing deps
		# apk-tools --virtual is no goot at reporting those.
		$SUDO_APK add --repository "$abuildrepo" $apk_opt_wait \
			--simulate --quiet $builddeps || return 1
		$SUDO_APK add --repository "$abuildrepo" $apk_opt_wait \
			--virtual .makedepends-$pkgname $builddeps || return 1
		if [ -n "$hostdeps" ]; then
			$SUDO_APK add --root "$CBUILDROOT" --repository "$abuildrepo" $apk_opt_wait \
				--simulate --quiet $hostdeps || return 1
			$SUDO_APK add --root "$CBUILDROOT" --repository "$abuildrepo" $apk_opt_wait \
				--virtual .makedepends-$pkgname $hostdeps || return 1
		fi
		return 0
	fi

	if [ -n "$CBUILDROOT" ]; then
		error "Recursive rebuilding is not supported when cross compiling."
		return 1
	fi
	[ -z "$recursive" ] && return 1

	# find dependencies that are installed but missing in repo.
	for i in $builddeps; do
		local m=$($APK search --repository "$abuildrepo" ${i%%[<>=]*})
		if [ -z "$m" ]; then
			missing="$missing $i"
		fi
	done

	for i in $(trace_makedepends $missing); do
		# i = pkg:dir
		local dir=${i#*:}
		local pkg=${i%:*}

		# ignore if dependency is in other repo
		[ -d "$dir" ] || continue

		# check if dep is blacklisted
		if list_has $pkg $ABUILD_BLACKLIST; then
			error "$pkg is blacklisted"
			return 1
		fi

		# break circular deps
		list_has $pkg $ABUILD_VISITED && continue
		export ABUILD_VISITED="$ABUILD_VISITED $pkg"

		msg "Entering $dir"
		cd "$dir" && $0 $forceroot $keep $quiet $install_deps \
			$recursive $upgrade $color_opt abuildindex || return 1
	done
	$SUDO_APK add --upgrade --repository "$abuildrepo" \
		$apk_opt_wait \
		--virtual .makedepends-$pkgname $builddeps
}

# replace the md5sums in the APKBUILD
checksum() {
	local s files
	[ -z "$source" ] && [ -n "${md5sums}${sha256sums}${sha512sums}" ] \
		&& msg "Removing checksums from APKBUILD"
	sed -i -e '/^md5sums="/,/"\$/d; /^md5sums=''/,/''\$/d' "$APKBUILD"
	sed -i -e '/^sha512sums="/,/"\$/d; /^sha512sums=''/,/''\$/d' "$APKBUILD"
	sed -i -e '/^sha256sums="/,/"\$/d; /^sha256sums=''/,/''\$/d' "$APKBUILD"
	[ -z "$source" ] && return 0
	fetch
	for s in $source; do
		files="$files $(filename_from_uri $s)"
	done

	# for compatibility/backporting reasons we still add md5sum
	msg "Updating the md5sums in APKBUILD..."
	md5sums="$(cd "$srcdir" && md5sum $files)" || die "md5sum failed"
	echo "md5sums=\"$md5sums\"" >>"$APKBUILD"

	msg "Updating the sha256sums in APKBUILD..."
	sha256sums="$(cd "$srcdir" && sha256sum $files)" \
		|| die "sha256sum failed"
	echo "sha256sums=\"$sha256sums\"" >>"$APKBUILD"

	msg "Updating the sha512sums in APKBUILD..."
	sha512sums="$(cd "$srcdir" && sha512sum $files)" \
		|| die "sha512sum failed"
	echo "sha512sums=\"$sha512sums\"" >>"$APKBUILD"
}

stripbin() {
	local bin
	if options_has "!strip" || [ "$arch" = "noarch" ]; then
		return 0
	fi
	cd "${subpkgdir:-$pkgdir}" || return 1
	msg "Stripping binaries"
	scanelf --recursive --nobanner --etype "ET_DYN,ET_EXEC" . \
		| sed -e 's:^ET_DYN ::' -e 's:^ET_EXEC ::' \
		| while read filename; do
		XATTR=$(getfattr --match="*" --dump "${filename}")
		${CROSS_COMPILE}strip "${filename}"
		[ -n "$XATTR" ] && (echo "$XATTR" | setfattr --restore=-)
	done
}

# simply list target apks
listpkg() {
	local name
	getpkgver || return 1
	for name in $(listpkgnames) ; do
		echo "$name-$pkgver-r$pkgrel.apk"
	done
}

source_has() {
	local i
	for i in $source; do
		[ "$1" = "${i##*/}" ] && return 0
		[ "$1" = "${i%%::*}" ] && return 0
	done
	return 1
}

subpackages_has() {
	local i
	for i in $subpackages; do
		[ "$1" = "${i%:*}" ] && return 0
	done
	return 1
}

subpackage_types_has() {
	local i
	for i in $subpackages; do
		[ "$1" = "${i##*-}" ] && return 0
	done
	return 1
}

list_has() {
	local needle="$1"
	local i
	shift
	for i in $@; do
		[ "$needle" = "$i" ] && return 0
		[ "$needle" = "!$i" ] && return 1
	done
	return 1
}

# same as list_has but we filter version info
deplist_has() {
	local needle="$1"
	local i
	shift
	for i in $@; do
		i=${i%%[<>=]*}
		[ "$needle" = "$i" ] && return 0
		[ "$needle" = "!$i" ] && return 1
	done
	return 1
}

options_has() {
	list_has "$1" $options
}

depends_has() {
	deplist_has "$1" $depends
}

makedepends_has() {
	deplist_has "$1" $makedepends
}

md5sums_has() {
	list_has "$1" $md5sums
}

install_has() {
	list_has "$1" $install
}

# install package after build
post_add() {
	getpkgver || return 1
	local pkgf="$PKGDEST/$1-$pkgver-r$pkgrel.apk"
	local deps i
	if ! subpackages_has $1 && [ "$1" != "$pkgname" ]; then
		die "$1 is not built by this APKBUILD"
	fi
	# recursively install dependencies that are provided by this APKBUILD
	deps=$($APK index "$pkgf" 2>/dev/null | awk -F: '$1=="D" { print $2 }')
	for i in $deps; do
		if subpackages_has $i || [ "$i" = "$pkgname" ]; then
			post_add $i || return 1
		fi
	done
	$SUDO_APK add $apk_opt_wait --upgrade "$pkgf" \
		|| die "Failed to install $1"
}

deps() {
	local builddeps i
	builddeps="$makedepends"
	for i in $depends; do
		[ "$pkgname" = "${i%%[<>=]*}" ] && continue
		subpackages_has ${i%%[<>=]*} || builddeps="$builddeps $i"
	done
	$SUDO_APK add $apk_opt_wait --repository "$abuildrepo" \
		--virtual .makedepends-$pkgname \
		$builddeps
}

undeps (){
	$SUDO_APK del $apk_opt_wait .makedepends-$pkgname
	if cross_compiling; then
		$SUDO_APK del --root "$CBUILDROOT" $apk_opt_wait \
			.makedepends-$pkgname
	fi
}

# compat
installdeps() { deps; }
uninstalldeps() { undeps; }
index() { update_abuildrepo_index; }

all() {
	if ! [ -n "$force" ]; then
		check_arch
		if [ $? -ne 0 ]; then
			echo "Package not available for the target architecture ($CARCH). Aborting."
			return 0
		fi
		check_libc || return 0
	fi
	if up2date && [ -z "$force" ]; then
		msg "Package is up to date"
	else
		build_abuildrepo
	fi
}

# This abuild hook will checkout an svn or git repository by specifying
# $svnurl or $giturl in APKBUILD. You can checkout a specific branch in
# git by adding -b $branch in $giturl. $reporev will select the correct
# commit, revision or tag for you. If you specify $disturl your distfile
# will automatically be uploaded with rsync to the url provided.
# Base version defaults to 0 except if specified by $verbase.

snapshot() {
        # check if we setup vars correctly
        [ -z "$disturl" ] && warning "Missing disturl in APKBUILD, auto uploading disabled."
        [ -z "$svnurl" ] && [ -z "$giturl" ] && die "Missding repository url in APKBUILD!"
        [ -n "$svnurl" ] && [ -n "$giturl" ] && die "You can only use a single repository!"
        local _date=$(date +%Y%m%d)
	local _format="tar.gz"
        # remove any repositories left in srcdir
        abuild clean
        mkdir -p "$srcdir" && cd "$srcdir"
        # clone git repo and archive
        if [ -n "$giturl" ]; then
                local _version=${verbase:-0}_git${_date}
                command -v git >/dev/null || \
                        die "Missing git! Install git to support git clone."
                [ -z "$reporev" ] && local _rev="HEAD" && local _depth="--depth=1"
                msg "Creating git snapshot: $pkgname-$_version"
                git clone $_depth --bare $giturl $pkgname-$_version || return 1
                git --git-dir $pkgname-$_version archive \
			--format=$_format \
                        -o $pkgname-$_version.$_format \
                        --prefix=$pkgname-$_version/ $_rev \
                        || return 1
        fi
        # export svn repo and archive
        if [ -n "$svnurl" ]; then
                local _version=${verbase:-0}_svn${_date}
                command -v svn >/dev/null || \
                        die "Missing svn! Install subverion to support svn export."
                [ -n "$reporev" ] && local _rev="-r $reporev"
                msg "Creating svn snapshot: $pkgname-$_version"
                svn co $_rev $svnurl $pkgname-$_version || return 1
                tar zcf $pkgname-$_version.$_format $pkgname-$_version || return 1
        fi
        # upload to defined distfiles url
        if [ -n "$disturl" ]; then
                command -v rsync >/dev/null || \
                        die "Missing rsync! Install rsync to enable automatic uploads."
                msg "Uploading to $disturl"
                rsync --progress -La $pkgname-$_version.$_format \
                        $disturl || return 1
                cd "$startdir"
                # set the pkgver to current date and update checksum
                sed -i -e "s/^pkgver=.*/pkgver=${_version}/" \
                        APKBUILD || return 1
                abuild checksum
                fi
}

usage() {
	echo "$program $program_version"
	cat << EOF
usage: $program [options] [-i PKG] [-P REPODEST] [-p PKGDEST]
              [-s SRCDEST] [cmd] ...
       $program [-c] -n PKGNAME[-PKGVER]
Options:
 -A  Print CARCH and exit
 -c  Enable colored output
 -d  Disable dependency checking
 -f  Force specified cmd, even if they are already done
 -F  Force run as root
 -h  Show this help
 -i  Install PKG after successful build
 -k  Keep built packages, even if APKBUILD or sources are newer
 -K  Keep buildtime temp dirs and files (srcdir/pkgdir/deps)
 -m  Disable colors (monochrome)
 -p  Set package destination directory
 -P  Set PKGDEST to REPODEST/<repo>/\$CARCH, where repo is the parents dir name
 -q  Quiet
 -r  Install missing dependencies from system repository (using sudo)
 -R  Recursively build and install missing dependencies (using sudo)
 -s  Set source package destination directory
 -u  Recursively build and upgrade all dependencies (using sudo)

Commands:
  build       Compile and install package into \$pkgdir
  checksum    Generate checksum to be included in APKBUILD
  clean       Remove temp build and install dirs
  cleancache  Remove downloaded files from \$SRCDEST
  cleanoldpkg Remove binary packages except current version
  cleanpkg    Remove already built binary and source package
  deps        Install packages listed in makedepends and depends
  fetch       Fetch sources to \$SRCDEST and verify checksums
  index       Regenerate the APKINDEX for abuildrepo
  listpkg     List target packages
  package     Create package in \$PKGDEST
  prepare     Apply patches
  rootpkg     Run 'package', the split functions and create apks as fakeroot
  sanitycheck Basic sanity check of APKBUILD
  snapshot    Create a \$giturl or \$svnurl snapshot and upload to \$disturl
  sourcecheck Check if remote source package exists upstream
  srcpkg      Make a source package
  undeps      Uninstall packages listed in makedepends and depends
  unpack      Unpack sources to \$srcdir
  up2date     Compare target and sources dates
  verify      Verify checksums

EOF
	exit 0
}

APKBUILD="${APKBUILD:-./APKBUILD}"
unset force
unset recursive
while getopts "AcdfFhi:kKimnp:P:qrRs:u" opt; do
	case $opt in
		'A') echo "$CARCH"; exit 0;;
		'c') enable_colors
		     color_opt="-c";;
		'd') nodeps=1;;
		'f') force="-f";;
		'F') forceroot="-F";;
		'h') usage;;
		'i') install_after="$install_after $OPTARG";;
		'k') keep="-k";;
		'K') CLEANUP="" ERROR_CLEANUP="" ;;
		'm') disable_colors
		     color_opt="-m";;
		'n') die "Use newapkbuild to create new aports";;
		'p') PKGDEST=$OPTARG;;
		'P') REPODEST=$OPTARG;;
		'q') quiet="-q";;
		'r') install_deps="-r";;
		'R') recursive="-R";;
		's') SRCDEST=$OPTARG;;
		'u') upgrade="-u"
		     recursive="-R";;
	esac
done
shift $(( $OPTIND - 1 ))

# check so we are not root
if [ "$(whoami)" = "root" ] && [ -z "$FAKEROOTKEY" ]; then
	[ -z "$forceroot" ] && die "Do not run abuild as root"
	FAKEROOT=
fi

# find startdir
[ -f "$APKBUILD" ] || die "Could not find $APKBUILD (PWD=$PWD)"
APKBUILD=$(readlink -f "$APKBUILD")

startdir="${APKBUILD%/*}"
srcdir=${srcdir:-"$startdir/src"}
pkgbasedir=${pkgbasedir:-"$startdir/pkg"}

repo=${startdir%/*}
repo=${repo##*/}

SRCDEST=${SRCDEST:-$startdir}
PKGDEST=${PKGDEST:-$startdir}

# set a default CC
: ${CC:=gcc}
export CC

cd "$startdir" || die
. "$APKBUILD"

# If REPODEST is set then it will override the PKGDEST
if [ -n "$REPODEST" ]; then
	PKGDEST="$REPODEST/$repo/$CARCH"
	# for recursive action
	export REPODEST
	abuildrepo="$REPODEST"/$repo
else
	abuildrepo="$abuildrepo_base"/$repo
fi

# if we want build debug package
if [ -n "$DEBUG" ] || subpackage_types_has "dbg"; then
	CFLAGS="$CFLAGS -g"
	CXXFLAGS="$CXXFLAGS -g"
	options="$options !strip"
fi

# If we are handling a sub package then reset subpackages and install
if [ -n "$subpkgname" ]; then
	origsubpackages="$subpackages"
	subpackages=
fi
pkgdir="$pkgbasedir/$pkgname"
controldir="$pkgbasedir"/.control.${subpkgname:-$pkgname}

trap 'die "Aborted by user"' INT
set_xterm_title "abuild: $pkgname"

if [ -z "$1" ]; then
	set all
fi

while [ $# -gt 0 ]; do
	runpart $1
	shift
done

for i in $install_after; do
	post_add $i
done

cleanup