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#!/hint/bash

# Some PKGBUILDs need CARCH to be set
CARCH=$(. "$(librelib conf.sh)"; load_files makepkg; echo "$CARCH")

# Useful functions
UMASK=""
set_umask () {
	[ "$UMASK" == "" ] && UMASK="$(umask)"
	export UMASK
	umask 002
}

restore_umask () {
	umask "$UMASK" >/dev/null
}

# just like mv -f, but we touch the file and then copy the content so
# default ACLs in the target dir will be applied
mv_acl() {
	rm -f "$2"
	touch "$2"
	cat "$1" >"$2" || return 1
	rm -f "$1"
}

# set up general environment
WORKDIR=$(mktemp -dt "${0##*/}.XXXXXXXXXX")
if [ -n "${SVNUSER}" ]; then
	setfacl -m u:"${SVNUSER}":rwx "${WORKDIR}"
	setfacl -m d:u:"${USER}":rwx "${WORKDIR}"
	setfacl -m d:u:"${SVNUSER}":rwx "${WORKDIR}"
fi
LOCKS=()
REPO_MODIFIED=0

# Used: plain, msg, msg2, warning, error, in_array, abort, die
# Overwritten: get_full_version, cleanup
# Ignored: stat_busy, stat_done,
#          setup_workdir, trap_abort, trap_exit,
#          lock, slock, lock_close
#          pkgver_equal, find_cached_package, check_root
. "$(librelib common)"

##
#  usage : get_full_version( $epoch, $pkgver, $pkgrel )
# return : full version spec, including epoch (if necessary), pkgver, pkgrel
##
get_full_version() {
	if [[ $1 -eq 0 ]]; then
		# zero epoch case, don't include it in version
		echo "$2-$3"
	else
		echo "$1:$2-$3"
	fi
}

script_lock() {
	local LOCKDIR="$TMPDIR/.scriptlock.${0##*/}"
	if ! mkdir "$LOCKDIR" >/dev/null 2>&1 ; then
		local _owner="$(/usr/bin/stat -c %U "$LOCKDIR")"
		error "Script %s is already locked by %s." "${0##*/}" "$_owner"
		exit 1
	else
		set_umask
		return 0
	fi
}

script_unlock() {
	local LOCKDIR="$TMPDIR/.scriptlock.${0##*/}"
	if [ ! -d "$LOCKDIR" ]; then
		warning "Script %s was not locked!" "${0##*/}"
		restore_umask
		return 1
	else
		rmdir "$LOCKDIR"
		restore_umask
		return 0
	fi
}

cleanup() {
	local l
	local repo
	local arch

	trap - EXIT INT QUIT TERM
	for l in "${LOCKS[@]}"; do
		repo=${l%.*}
		arch=${l#*.}
		if [ -d "$TMPDIR/.repolock.$repo.$arch" ]; then
			msg "Removing left over lock from [%s] (%s)" "${repo}" "${arch}"
			repo_unlock "$repo" "$arch"
		fi
	done
	if [ -d "$TMPDIR/.scriptlock.${0##*/}" ]; then
		msg "Removing left over lock from %s" "${0##*/}"
		script_unlock
	fi
	rm -rf "$WORKDIR"

	if (( REPO_MODIFIED )); then
		date +%s > "${FTP_BASE}/lastupdate"
	fi

	[ "$1" ] && exit "$1"
}

trap abort INT QUIT TERM HUP
trap cleanup EXIT


#repo_lock <repo-name> <arch> [timeout]
repo_lock () {
	local LOCKDIR="$TMPDIR/.repolock.$1.$2"
	local DBLOCKFILE="${FTP_BASE}/${1}/os/${2}/${1}${DBEXT}.lck"
	local _count
	local _trial
	local _timeout
	local _lockblock
	local _owner

	# This is the lock file used by repo-add and repo-remove
	if [ -f "${DBLOCKFILE}" ]; then
		error "Repo [%s] (%s) is already locked by repo-{add,remove} process %s" "$1" "$2" "$(<"$DBLOCKFILE")"
		return 1
	fi

	if [ $# -eq 2 ]; then
		_lockblock=true
		_trial=0
	elif [ $# -eq 3 ]; then
		_lockblock=false
		_timeout=$3
		let _trial=$_timeout/$LOCK_DELAY
	fi

	_count=0
	while [ "$_count" -le "$_trial" ] || "$_lockblock" ; do
		if ! mkdir "$LOCKDIR" >/dev/null 2>&1 ; then
			_owner="$(/usr/bin/stat -c %U "$LOCKDIR")"
			warning "Repo [%s] (%s) is already locked by %s." "${1}" "${2}" "$_owner"
			msg2 "Retrying in %d seconds..." "$LOCK_DELAY"
		else
			LOCKS+=("$1.$2")
			set_umask
			return 0
		fi
		sleep "$LOCK_DELAY"
		let _count=$_count+1
	done

	error "Repo [%s] (%s) is already locked by %s. Giving up!" "${1}" "${2}" "$_owner"
	return 1
}

repo_unlock () { #repo_unlock <repo-name> <arch>
	local LOCKDIR="$TMPDIR/.repolock.$1.$2"
	if [ ! -d "$LOCKDIR" ]; then
		warning "Repo lock [%s] (%s) was not locked!" "${1}" "${2}"
		restore_umask
		return 1
	else
		rmdir "$LOCKDIR"
		restore_umask
		return 0
	fi
}

# usage: _grep_pkginfo pkgfile pattern
_grep_pkginfo() {
	local _ret

	_ret="$(/usr/bin/bsdtar -xOqf "$1" .PKGINFO | grep -m 1 "^${2} = ")"
	echo "${_ret#${2} = }"
}

# usage: _grep_buildinfo pkgfile pattern
_grep_buildinfo() {
	local _ret

	_ret="$(/usr/bin/bsdtar -xOqf "$1" .BUILDINFO | grep -m 1 "^${2} = ")"
	echo "${_ret#${2} = }"
}

# Get the package base or name as fallback
getpkgbase() {
	local _base

	_base="$(_grep_pkginfo "$1" "pkgbase")"
	if [ -z "$_base" ]; then
		getpkgname "$1"
	else
		echo "$_base"
	fi
}

issplitpkg() {
	local _base

	_base="$(_grep_pkginfo "$1" "pkgbase")"
	if [ -z "$_base" ]; then
		return 1
	else
		return 0
	fi
}

# Get the package name
getpkgname() {
	local _name

	_name="$(_grep_pkginfo "$1" "pkgname")"
	if [ -z "$_name" ]; then
		error "Package '%s' has no pkgname in the PKGINFO. Fail!" "$1"
		exit 1
	fi

	echo "$_name"
}

# Get the pkgver-pkgrel of this package
getpkgver() {
	local _ver

	_ver="$(_grep_pkginfo "$1" "pkgver")"
	if [ -z "$_ver" ]; then
		error "Package '%s' has no pkgver in the PKGINFO. Fail!" "$1"
		exit 1
	fi

	echo "$_ver"
}

getpkgarch() {
	local _ver

	_ver="$(_grep_pkginfo "$1" "arch")"
	if [ -z "$_ver" ]; then
		error "Package '%s' has no arch in the PKGINFO. Fail!" "$1"
		exit 1
	fi

	echo "$_ver"
}

check_packager() {
	local _packager

	_packager=$(_grep_pkginfo "$1" "packager")
	[[ $_packager && $_packager != 'Unknown Packager' ]]
}

check_buildinfo() {
	/usr/bin/bsdtar -tf "$1" .BUILDINFO >/dev/null 2>&1
}

check_builddir() {
	local _builddir

	_builddir=$(_grep_buildinfo "$1" "builddir")
	[[ $_builddir && $_builddir = '/build' ]]
}

getpkgfile() {
	if [[ ${#} -ne 1 ]]; then
		error 'No canonical package found!'
		exit 1
	elif [ ! -f "${1}" ]; then
		error "Package %s not found!" "${1}"
		exit 1
	elif "${REQUIRE_SIGNATURE}" && [ ! -f "${1}.sig" ]; then
		error "Package signature %s not found!" "${1}.sig"
		exit 1
	fi

	echo "${1}"
}

getpkgfiles() {
	local f
	if [ ! -z "$(printf '%s\n' "${@%\.*}" | sort | uniq -D)" ]; then
		error 'Duplicate packages found!'
		exit 1
	fi

	for f in "${@}"; do
		if  [ ! -f "${f}" ]; then
			error "Package %s not found!" "${f}"
			exit 1
		elif "${REQUIRE_SIGNATURE}" && [ ! -f "${f}.sig" ]; then
			error "Package signature %s not found!" "${f}.sig"
			exit 1
		fi
	done

	echo "${@}"
}

check_pkgfile() {
	local pkgfile=$1

	local pkgname="$(getpkgname "${pkgfile}")"
	[ $? -ge 1 ] && return 1
	local pkgver="$(getpkgver "${pkgfile}")"
	[ $? -ge 1 ] && return 1
	local pkgarch="$(getpkgarch "${pkgfile}")"
	[ $? -ge 1 ] && return 1

	in_array "${pkgarch}" "${ARCHES[@]}" 'any' || return 1

	if echo "${pkgfile##*/}" | grep "${pkgname}-${pkgver}-${pkgarch}" &>/dev/null; then
		return 0
	else
		return 1
	fi
}

check_pkgsvn() {
	local pkgfile="${1}"
	local _pkgbase="$(getpkgbase "${pkgfile}")"
	[ $? -ge 1 ] && return 1
	local _pkgname="$(getpkgname "${pkgfile}")"
	[ $? -ge 1 ] && return 1
	local _pkgver="$(getpkgver "${pkgfile}")"
	[ $? -ge 1 ] && return 1
	local _pkgarch="$(getpkgarch "${pkgfile}")"
	[ $? -ge 1 ] && return 1
	local repo="${2}"

	in_array "${repo}" "${PKGREPOS[@]}" || return 1

	if [ ! -f "${WORKDIR}/pkgbuilds/${repo}-${_pkgarch}/${_pkgbase}" ]; then
		mkdir -p "${WORKDIR}/pkgbuilds/${repo}-${_pkgarch}"
		arch_svn export -q "${SVNREPO}/${_pkgbase}/repos/${repo}-${_pkgarch}/PKGBUILD" \
			"${WORKDIR}/pkgbuilds/${repo}-${_pkgarch}/${_pkgbase}" >/dev/null
		[ $? -ge 1 ] && return 1
	fi

	local svnver="$(. "${WORKDIR}/pkgbuilds/${repo}-${_pkgarch}/${_pkgbase}"; get_full_version "${epoch:-0}" "${pkgver}" "${pkgrel}")"
	[ "${svnver}" == "${_pkgver}" ] || return 1

	local svnnames=($(. "${WORKDIR}/pkgbuilds/${repo}-${_pkgarch}/${_pkgbase}"; echo "${pkgname[@]}"))
	in_array "${_pkgname}" "${svnnames[@]}" || return 1

	return 0
}

check_splitpkgs() {
	local repo="${1}"
	shift
	local pkgfiles=("${@}")
	local pkgfile
	local pkgdir
	local svnname

	mkdir -p "${WORKDIR}/check_splitpkgs/"
	pushd "${WORKDIR}/check_splitpkgs" >/dev/null

	for pkgfile in "${pkgfiles[@]}"; do
		issplitpkg "${pkgfile}" || continue
		local _pkgbase="$(getpkgbase "${pkgfile}")"
		local _pkgname="$(getpkgname "${pkgfile}")"
		local _pkgarch="$(getpkgarch "${pkgfile}")"
		mkdir -p "${repo}/${_pkgarch}/${_pkgbase}"
		echo "${_pkgname}" >> "${repo}/${_pkgarch}/${_pkgbase}/staging"

		if [ ! -f "${WORKDIR}/pkgbuilds/${repo}-${_pkgarch}/${_pkgbase}" ]; then
			mkdir -p "${WORKDIR}/pkgbuilds/${repo}-${_pkgarch}"
			arch_svn export -q "${SVNREPO}/${_pkgbase}/repos/${repo}-${_pkgarch}/PKGBUILD" \
				"${WORKDIR}/pkgbuilds/${repo}-${_pkgarch}/${_pkgbase}" >/dev/null
			[ $? -ge 1 ] && return 1
		fi

		local svnnames=($(. "${WORKDIR}/pkgbuilds/${repo}-${_pkgarch}/${_pkgbase}"; echo "${pkgname[@]}"))
		printf '%s\n' "${svnnames[@]}" >> "${repo}/${_pkgarch}/${_pkgbase}/svn"
	done
	popd >/dev/null

	for pkgdir in "${WORKDIR}/check_splitpkgs/${repo}"/*/*; do
		[ ! -d "${pkgdir}" ] && continue
		sort -u "${pkgdir}/staging" -o "${pkgdir}/staging"
		sort -u "${pkgdir}/svn" -o "${pkgdir}/svn"
		if [ ! -z "$(comm -13 "${pkgdir}/staging" "${pkgdir}/svn")" ]; then
			return 1
		fi
	done

	return 0
}

check_pkgrepos() {
	local pkgfile=$1

	local pkgname="$(getpkgname "${pkgfile}")"
	[ $? -ge 1 ] && return 1
	local pkgver="$(getpkgver "${pkgfile}")"
	[ $? -ge 1 ] && return 1
	local pkgarch="$(getpkgarch "${pkgfile}")"
	[ $? -ge 1 ] && return 1

	[ -f "${FTP_BASE}/${PKGPOOL}/${pkgname}-${pkgver}-${pkgarch}"${PKGEXT} ] && return 1
	[ -f "${FTP_BASE}/${PKGPOOL}/${pkgname}-${pkgver}-${pkgarch}"${PKGEXT}.sig ] && return 1
	[ -f "${FTP_BASE}/${PKGPOOL}/${pkgfile##*/}" ] && return 1
	[ -f "${FTP_BASE}/${PKGPOOL}/${pkgfile##*/}.sig" ] && return 1

	return 0
}

#usage: chk_license ${license[@]}"
chk_license() {
	local l
	for l in "${@}"; do
		in_array "${l}" "${ALLOWED_LICENSES[@]}" && return 0
	done

	return 1
}

check_repo_permission() {
	local repo=$1

	[ ${#PKGREPOS[@]} -eq 0 ] && return 1
	[ -z "${PKGPOOL}" ] && return 1

	in_array "${repo}" "${PKGREPOS[@]}" || return 1

	[ -w "$FTP_BASE/${PKGPOOL}" ] || return 1

	local arch
	for arch in "${ARCHES[@]}"; do
		local dir="${FTP_BASE}/${repo}/os/${arch}/"
		[ -w "${dir}" ] || return 1
		[ -f "${dir}${repo}"${DBEXT} -a ! -w "${dir}${repo}"${DBEXT} ] && return 1
		[ -f "${dir}${repo}"${FILESEXT} -a ! -w "${dir}${repo}"${FILESEXT} ] && return 1
	done

	return 0
}

set_repo_permission() {
	local repo=$1
	local arch=$2
	local dbfile="${FTP_BASE}/${repo}/os/${arch}/${repo}${DBEXT}"
	local filesfile="${FTP_BASE}/${repo}/os/${arch}/${repo}${FILESEXT}"

	if [ -w "${dbfile}" ]; then
		local group=$(/usr/bin/stat --printf='%G' "$(dirname "${dbfile}")")
		chgrp "$group" "${dbfile}"    || error "Could not change group of %s to %s" "${dbfile}"    "$group"
		chgrp "$group" "${filesfile}" || error "Could not change group of %s to %s" "${filesfile}" "$group"
		chmod g+w "${dbfile}"    || error "Could not set write permission for group %s to %s" "$group" "${dbfile}"
		chmod g+w "${filesfile}" || error "Could not set write permission for group %s to %s" "$group" "${filesfile}"
	else
		error "You don't have permission to change %s" "${dbfile}"
	fi
}

arch_repo_add() {
	local repo=$1
	local arch=$2
	local pkgs=("${@:3}")

	# package files might be relative to repo dir
	pushd "${FTP_BASE}/${repo}/os/${arch}" >/dev/null
	/usr/bin/repo-add -q "${repo}${DBEXT}" "${pkgs[@]}" \
		|| error '%s' "repo-add ${repo}${DBEXT} ${pkgs[*]}"
	popd >/dev/null
	set_repo_permission "${repo}" "${arch}"

	REPO_MODIFIED=1
}

arch_repo_remove() {
	local repo=$1
	local arch=$2
	local pkgs=("${@:3}")
	local dbfile="${FTP_BASE}/${repo}/os/${arch}/${repo}${DBEXT}"

	if [ ! -f "${dbfile}" ]; then
		error "No database found at '%s'" "${dbfile}"
		return 1
	fi
	/usr/bin/repo-remove -q "${dbfile}" "${pkgs[@]}" \
		|| error '%s' "repo-remove ${dbfile} ${pkgs[*]}"
	set_repo_permission "${repo}" "${arch}"

	REPO_MODIFIED=1
}

arch_svn() {
	if [ -z "${SVNUSER}" ]; then
		/usr/bin/svn "${@}"
	else
		sudo -u "${SVNUSER}" -- /usr/bin/svn --username "${USER}" "${@}"
	fi
}