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#!/bin/bash
export LB_VERSION=$VERSION
export LB_BASE="${LB_BASE:-/usr/share/live/build}"

current_script="$(basename "$0"|sed 's/^lb_//')"

Compat_arguments ()
{
	while [ "$#" -gt 0 ]
	do
		arg="$1"
		shift
		case "$arg" in
		-r|--repositories) arg="--archives";;
		--architecture) arg="--architectures";;
		--syslinux-theme) ;;
		# ignore other unsupported arguments
		--syslinux-*|--bootstrap-config|-e|--encryption|-l|--language) shift; continue;;
		--binary-indices|--packages|--symlinks|--sysvinit|--tasks|--virtual-root-size) shift; continue;;
		--packages-lists|--package-lists|-p) Compat_packagelists $1; shift; continue;;
		esac
		echo -n "$arg$IFS"
	done
}

Compat_config ()
{
[ -e config/chroot ] && [ "$LB_ARCHIVES" ] && cat <<eof >> config/chroot

# Compat (Live-build 2 -> 3)
LB_REPOSITORIES="$LB_ARCHIVES"
LB_PACKAGES_LISTS="$LB_PACKAGE_LISTS"
eof
[ -e config/bootstrap ] && [ "$LB_ARCHITECTURES" ] && cat <<eof >> config/bootstrap

# Compat (Live-build 2 -> 3)
LB_ARCHITECTURE="$LB_ARCHITECTURES"
eof
}

Compat_dir ()
{
	dir2="$1"
	dir3="$2"
	ext2="$3"
	ext3="$4"
	[ ! -e "config/$dir2" ] && return 0
	if [ -z "$ext2$ext3" ]; then
		rm -r "config/$dir3"
		ln -s "$(basename "$dir2")" "config/$dir3"
	else
		mkdir -p config/$dir3
		for i in config/$dir2/*
		do
			[ ! -e "$i" ] && return
			target="$(basename "$i" $ext2)$ext3"
			rm -f config/$dir3/"$target"
			if [ -d "$i" ]; then
				ln -s "../../../$i" /config/$dir3/"$target"
			else
				cp -l "$i" config/$dir3/"$target"
			fi
		done
	fi
	touch config/$dir3.compat
}

Compat_packagelists()
{
	LB_PACKAGE_LISTS="$1"
	LB_PACKAGES_LISTS="$1"
	mkdir -p config/package-lists
	(
		echo '# AUTOGENERATED from "lb config -p" option - DO NOT CHANGE'
		IFS=" "
		for packagelist in $1
		do
			echo "#include <$packagelist>"
		done
	) > config/package-lists/compat.list.chroot
}

Compat_clean()
{
	for i in config/*.compat
	do
		[ -e "$i" ] || return 0
		target="$(basename "$i" .compat)"
		[ -e config/$target ] || continue
		rm -r config/$target
		rm "$i"
	done
	return 0
}

case "$LB_VERSION" in
3*)
	case "$current_script" in
	config)
		if [ -z "$LB_COMPAT_CONFIG_AUTO" ]; then
			export LB_COMPAT_CONFIG_AUTO=1
			auto/config "$@"
			exit $?
		fi
		OIFS="$IFS"; IFS="$(printf \\a)"
		set -- $(Compat_arguments "$@")
		IFS="$OIFS"
		[ -z "$LB_ARCHIVES" ] && LB_ARCHIVES="$LB_REPOSITORIES"
		LB_REPOSITORIES="$LB_ARCHIVES" 
		[ -z "$LB_PACKAGE_LISTS" ] && LB_PACKAGE_LISTS="$LB_PACKAGES_LISTS"
		LB_PACKAGES_LISTS="$LB_PACKAGE_LISTS"
		[ -z "$LB_ARCHITECTURES" ] && LB_ARCHITECTURES="$LB_ARCHITECTURE"
		LB_ARCHITECTURE="$LB_ARCHITECTURES"
		trap Compat_config EXIT
		;;
	chroot_apt)
		Compat_dir chroot_local-packages packages.chroot
		;;
	chroot_archives)
		mkdir -p config/archives
		touch config/archives.compat
		. config/bootstrap
		for REPO in $LB_ARCHIVES
		do
			for i in config/repositories/$REPO config/repositories/$REPO.gpg
			do
				[ ! -e "$i" ] && continue
				case "$i" in
				*.gpg) target="$(basename "$i" .gpg).key";;
				*) target="$(basename "$i" .list).list";;
				esac
				rm -f config/archives/"$target"
				cp -l "$i" config/archives/"$target"
			done
		done
		;;
	chroot_preseed)
		Compat_dir chroot_local-preseed preseed .cfg .preseed
		;;
	chroot_includes)
		Compat_dir chroot_local-includes includes.chroot
		;;
	chroot_hooks)
		Compat_dir chroot_local-hooks hooks - .chroot
		;;
	binary_hooks)
		Compat_dir binary_local-hooks hooks - .binary
		;;
	build|clean)
		trap Compat_clean EXIT
		;;
	esac
	[ -d config/lists ] && . auto/compat
	;;
esac