abuild.in

#!/bin/sh

# script to build apk packages (light version of makepkg)
# Copyright (c) 2008 Natanael Copa <natanael.copa@gmail.com>
#
# Distributed under GPL-2
#
# Depends on: busybox utilities, fakeroot, 
#

abuild_ver=@VERSION@
sysconfdir=@sysconfdir@
abuildrepo_base=@abuildrepo@
datadir=@datadir@

program=${0##*/}
abuild_path=$(readlink -f $0)

# defaults
BUILD_BASE="build-base"
SUDO=${SUDO:-"sudo"}
FAKEROOT=${FAKEROOT:-"fakeroot"}
APK=${APK:-apk}
apk_opt_wait="--wait 30"

# read config
ABUILD_CONF=${ABUILD_CONF:-"$sysconfdir/abuild.conf"}
[ -f "$ABUILD_CONF" ] && . "$ABUILD_CONF"

default_colors() {
	NORMAL="\033[1;0m"
	STRONG="\033[1;1m"
	RED="\033[1;31m"
	GREEN="\033[1;32m"
	YELLOW="\033[1;33m"
	BLUE="\033[1;34m"
}

monochrome() {
	NORMAL=""
	STRONG=""
	RED=""
	GREEN=""
	YELLOW=""
	BLUE=""
}

#colors
if [ -n "$USE_COLORS" ]; then
    default_colors
fi	
	

# functions
msg() {
	local prompt="$GREEN>>>${NORMAL}"
	local fake="${FAKEROOTKEY:+${BLUE}*${NORMAL}}"
	local name="${STRONG}${subpkgname:-$pkgname}${NORMAL}"
	[ -z "$quiet" ] && printf "${prompt} ${name}${fake}: $@\n" >&2
}

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

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

	
set_xterm_title() {
	if [ "$TERM" = xterm ] && [ -n "$USE_COLORS" ]; then
		 printf "\033]0;$1\007" >&2
	fi
} 

cleanup() {
	set_xterm_title ""
	if [ -z "$install_after" ] && [ -n "$uninstall_after" ]; then
		msg "Uninstalling dependencies..."
		$SUDO $APK del --quiet $apk_opt_wait $uninstall_after
	fi
}

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

# check if apkbuild is basicly sane
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
		$APK version --check -q "$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"

	# check if CARCH, CBUILD, CHOST and CTARGET is set
	if [ -z "$CARCH" ]; then
		case "$(uname -m)" in
		i[0-9]86) suggestion=" (Suggestion: CARCH=x86)";;
		x86_64) suggestion=" (Suggestion: CARCH=x86_64)";;
		esac
		die "Please set CARCH in /etc/abuild.conf$suggestion"
	fi
	[ -z "$CHOST" ] && die "Please set CHOST in /etc/abuild.conf"

	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"
	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
			md5sums_has ${i##*/} || die "${i##*/} is missing in md5sums"
			case "$i" in
				https://*) makedepends_has wget || die "wget must be in makedepends when source has https://" ;;
			esac
		done
	fi

	if [ -n "$md5sums" ]; then
		for i in $(echo "$md5sums" | awk '{ print $2 }'); do
			source_has $i || die "$i exists in md5sums but is missing in source"
		done
	fi

	# common spelling errors
	[ -n "$depend" ] && die "APKBUILD contains 'depend'. It should be depends"
	[ -n "$makedepend" ] && die "APKBUILD contains 'makedepend'. It should be makedepends"

	grep '^# Maintainer:' $APKBUILD >/dev/null || warning "No maintainer"

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

md5check() {
	local dummy f endreturnval originalparams origin file
	if [ -z "$source" ]; then
		return 0
	fi
	if [ -z "$md5sums" ]; then
		die "Use 'abuild checksum' to generate/update the checksum(s)"
	fi
	if [ "$(echo $source | wc -l)" -ne "$(echo $md5sums | wc -l)" ]; then
		die "Number of md5sums does not correspond to number of sources"
	fi
	fetch || return 1
	msg "Checking md5sums..."
	cd "$srcdir" || return 1
	IFS=$'\n'
	endreturnval=0
	originalparams=$@
	set -- $source
	for src in $md5sums; do
		origin=$1; shift
		echo "$src" | md5sum -c
		if [ $? -ne 0 ]; then
			endreturnval=1
			is_remote $origin || continue
			echo "Because the remote file above failed the md5sum check it will be deleted."
			echo "Rebuilding will cause it to re-download which in some cases may fix the problem."
			file=`echo "$src" | sed 's/.*[ \t\n]\(.*\)/\1/'`
			echo "Deleting: $file"
			rm $file
		fi
	done
	unset IFS
	set -- $originalparams
	return $endreturnval
}

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

uri_fetch() {
	local uri="$1"
	local d="${uri##*/}"	# $(basename $uri)
	local opts
	[ -n "$quiet" ] && opts="-q"
	[ -f "$SRCDEST/$d" ] && return 0

	# 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)}";;
	esac

	# we need GNU wget for this
	case "$uri" in
		https://*) opts="--no-check-certificate";;
	esac
	
	mkdir -p "$SRCDEST"
	if [ -f "$SRCDEST/$d.part" ]; then
		msg "Partial download found. Trying to resume"
		opts="$opts -c"
	fi
	msg "Fetching $uri"
	wget $opts -O "$SRCDEST/$d.part" "$uri" \
		&& mv "$SRCDEST/$d.part" "$SRCDEST/$d"
}

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

# try download from file from mirror first
uri_fetch_mirror() {
	local uri="$1"
	local d="${uri##*/}"	# $(basename $uri)
	if [ -n "$DISTFILES_MIRROR" ]; then
		if is_remote "$DISTFILES_MIRROR"; then
			uri_fetch "$DISTFILES_MIRROR"/$d && return 0
		else
			cp "$DISTFILES_MIRROR"/$d "$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/${s##*/}" "$srcdir"/
		else		
			ln -sf "$startdir/$s" "$srcdir/"
		fi
	done
}

fetch() {
	default_fetch
}

# verify that all init.d scripts are openrc runscripts
initdcheck() {
	local i
	for i in $source; do
		case $i in
		*.initd)
			head -n 1 "$srcdir"/$i | grep -q '/sbin/runscript' \
				&& continue
			error "$i is not an openrc #!/sbin/runscript"
			return 1
			;;
		esac
	done			
}

# unpack the sources
default_unpack() {
	local u
	if [ -z "$force" ]; then
		md5check || return 1
		initdcheck || return 1
	fi
	mkdir -p "$srcdir"
	for u in $source; do
		local s="$SRCDEST/${u##*/}"	# $(basename $s)
		case "$s" in
			*.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
			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
}

# 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
	return 0
}

mkusers() {
	local i
	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
			$SUDO adduser -D -H $gopt $i || return 1
		fi
	done
	for i in $pkggroups; do
		if ! getent group $i >/dev/null; then
			msg "Creating group $i"
			$SUDO addgroup $i || return 1
		fi
	done
}


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
}

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 $func..."
		subpkgdir="$pkgbasedir/${i%:*}" subpkgname="${i%:*}" \
			$0 $func prepare_package || return 1
	done
}

lang_subpkg() {
	if [ -z "$lang" ]; then
		error "lang is not set"
		return 1
	fi
	arch="noarch"
	install_if="$pkgname=$pkgver-r$pkgrel lang-$lang"
	mkdir -p "$subpkgdir"/usr/share/locale
	mv "$pkgdir"/usr/share/locale/$lang* \
		"$subpkgdir"/usr/share/locale/ \
		|| return 1
}

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")
	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

	echo "# Generated by $(basename $0) $abuild_ver" >"$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 busbox; then
		for i in $install $triggers; do
			local s=${i%=*}
			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
	
	local last_commit="$(git_last_commit)$(git_dirty)"
	if [ -n "$last_commit" ]; then
		echo "commit = $last_commit" >> "$pkginfo"
	fi

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

	for i in $license; do
		echo "license = $i" >> "$pkginfo"
	done
	for i in $replaces; do
		echo "replaces = $i" >> "$pkginfo"
	done
	for i in $deps; do
		echo "depend = $i" >> "$pkginfo"
	done
	for i in $conflicts; do
		echo "conflict = $i" >> "$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" != "$pkgname" ]; then
			continue
		fi
		script=${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_tracedeps() {
	local dir=${subpkgdir:-$pkgdir}
	[ "$arch" = "noarch" ] && return 0
	options_has "!tracedeps" && return 0
	# lets tell all the .so files this package provides in .provides-so
	find -name '*.so' -o -name '*.so.[0-9]*' | sed 's:.*/::' \
		>"$controldir"/.provides-so
	# lets tell all the places we should look for .so files - all rpaths
	scanelf -q -Rr "$dir" | sed -e 's/[[:space:]].*//' -e 's/:/\n/' \
		| sort | uniq \
		>"$controldir"/.rpaths
	# now find the so dependencies
	scanelf -Rn "$dir" | tr ' ' ':' | awk -F ":" '$1 == "ET_DYN" || $1 == "ET_EXEC" {print $2}'  \
		| sed 's:,:\n:g' | sort | uniq \
	| while read i; do
		# only add files that are not self provided
		grep "^$i$" "$controldir"/.provides-so >/dev/null \
			|| echo $i >> "$controldir"/.needs-so
	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"
}

# 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_tracedeps || 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
}

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

	# special case for libpthread: we need depend on libgcc
	if [ -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
		found=
		# first check if its provide by same apkbuild
		for j in "$dir"/../.control.*/.provides-so; do
			grep -w "$i" "$j" >/dev/null || continue
			found=${j%/.provides-so}
			found=${found##*/.control.}
			break
		done
		if [ -n "$found" ]; then
			if ! list_has "$found" $self_provided; then
				self_provided="$self_provided $found"
			fi
		else
			missing="$missing $i"
		fi
	done

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

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

	[ -z "$autodeps" ] && return 0
	echo "# automatically detected:" >> "$dir"/.PKGINFO
	for i in $autodeps; do
		echo "depend = $i" >> "$dir"/.PKGINFO
	done
}

create_apks() {
	local file
	getpkgver || return 1
	mkdir -p "$PKGDEST"
	for file in "$pkgbasedir"/.control.*/.PKGINFO; do
		local dir="${file%/.PKGINFO}"
		local name=$(pkginfo_val pkgname $file)
		local ver=$(pkginfo_val pkgver $file)
		local apk=$name-$ver.apk
		local datadir="$pkgbasedir"/$name

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

		# 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

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

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() {
	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
}

update_abuildrepo() {
	local d apk
	if ! apk_up2date || [ -n "$force" ]; then
		sanitycheck && builddeps && clean && fetch && unpack \
			&& prepare && mkusers && rootpkg || return 1
	fi

	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"}

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

#	# compress info and man pages
#	find "$subpkgdir/usr/share" \( -name '*.info' -o -name '*.info-[1-9]' \
#		-o -name '*.[1-9]' \) -exec gzip {} \;

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

#	[ -d "$subpkgdir/usr/share/man" ] && depends="man"
	return 0
}

doc() {
	default_doc
}

# predefined splitfunc mod
default_mod() {
	depends="$kernel $depends_mod"
	for i in firmware modules; do
		if [ -d "$pkgdir/lib/$i" ]; then
			rm -rf "$subpkgdir/lib"
			mkdir -p "$subpkgdir/lib"
			mv "$pkgdir/lib/$i" "$subpkgdir/lib"
		fi
	done
}

mod() {
	default_mod
}

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

	for i in $origsubpackages; do
		[ "${i%:*}" = "$subpkgname" ] || depends="$depends ${i%:*}"
	done
		
	cd "$pkgdir" || return 0
	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]*\
			$(find -name include -type d) 		\
			$(find usr/ -name '*.[acho]' -o -name '*.la' \
			2>/dev/null); do
		if [ -e "$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
}

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 do_build=build
	cd "$startdir"
	if is_function package; then
		build || return 1
		do_build=package
	fi
	cd "$startdir"
	[ -n "$FAKEROOT" ] && msg "Entering fakeroot..."
	do_fakeroot "$abuild_path" $color_opt $do_build \
		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 $prefix/${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" ]
}

# 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="$SRCDEST/${i##*/}"	# $(basename $i)
		else
			s="$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
	apk_up2date && abuildindex_up2date
}

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

# source all APKBUILDs and output:
#  1) origin of package
#  2) all dependencies
# the output is i in a format easy parseable for awk
depparse_aports() {
	# lets run this in a subshell since we source all APKBUILD here
	(
	aportsdir=$(realpath ${APKBUILD%/APKBUILD}/..)
	for i in $aportsdir/*/APKBUILD; do
		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
	)
}

deptrace() {
	local deps= i=
	# strip versions from deps
	for i in "$@"; do
		deps="$deps ${i%%[<>=]*}"
	done
	[ -z "$deps" ] && return 0
	( 	depparse_aports 
		if [ -z "$upgrade" ]; then
			# list installed pkgs and prefix with 'i '
			$APK info -q | sort |  sed 's/^/i /'
		fi
	) | awk -v pkgs="$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 deps= alldeps= pkg= i= dir= ver= missing= installed_deps=
	local filtered_deps= conflicts=
	[ -n "$nodeps" ] && return 0
	msg "Analyzing dependencies..."

	# add depends unless it is a subpackage or package itself
	for i in $BUILD_BASE $depends $makedepends; do
		[ "$pkgname" = "${i%%[<>=]*}" ] && continue
		subpackages_has ${i%%[<>=]*} || deps="$deps $i"
	done

	installed_deps=$($APK info -e $deps)
	# find which deps are missing
	for i in $deps; do
		if [ "${i#\!}" != "$i" ]; then
			$APK info -q -e "${i#\!}" \
				&& conflicts="$conflicts ${i#\!}"
		elif ! deplist_has $i $installed_deps || [ -n "$upgrade" ]; then
			missing="$missing $i"
		fi
	done