#!/usr/bin/env bash
#
# Author: Dmitry Razumov <asmeron@ublinux.com>
# Copyright (c) 2021-2025 UBLinux <support@ublinux.com>
#
# Initial script for Linux UBLinux
# This script are launching before starting init from initrd script
# Current dir allways must be set to root (/)
# All system path must be relative, except initrd dirs

ENABLED=yes
[[ ${ENABLED} == "yes" ]] || exit 0
DEBUGMODE=no

PATH=.:/:/usr/bin:/usr/local/bin:/usr/local/sbin

[[ -d /usr/lib/ublinux ]] && { ROOTFS= ; CMD_CHROOT= ; } || { [[ -d /sysroot ]] && ROOTFS="/sysroot" || ROOTFS="."; CMD_CHROOT="chroot ${ROOTFS}"; }
SOURCE=${ROOTFS}/usr/lib/ublinux/functions; [[ -f ${SOURCE} ]] && . ${SOURCE} 2>/dev/null || exit 0
SOURCE=${ROOTFS}/usr/lib/ublinux/default; [[ -f ${SOURCE} ]] && . ${SOURCE} 2>/dev/null || exit 0

debug_mode "$0" "$@"

SYSCONF="${ROOTFS}${SYSCONF}"
SOURCE=${SYSCONF}/config; [[ -f ${SOURCE} ]] && . ${SOURCE} 2>/dev/null

exec_swapspace(){
    local PATH_SWAP=
    if [[ -f ${ROOTFS}/usr/bin/swapspace ]]; then
        [[ -z ${PATH_SWAP} ]] && { PATH_SWAP="/memory/layer-base/3" && [[ -d ${PATH_SWAP} && -w ${PATH_SWAP} ]] || PATH_SWAP= ; }
        [[ -z ${PATH_SWAP} ]] && { PATH_SWAP="/memory/layer-base/2" && [[ -d ${PATH_SWAP} && -w ${PATH_SWAP} ]] || PATH_SWAP= ; }
        [[ -z ${PATH_SWAP} ]] && { PATH_SWAP="/memory/layer-base/1" && [[ -d ${PATH_SWAP} && -w ${PATH_SWAP} ]] || PATH_SWAP= ; }
        [[ -z ${PATH_SWAP} ]] && { PATH_SWAP="/memory/layer-base/0" && [[ -d ${PATH_SWAP} && -w ${PATH_SWAP} ]] || PATH_SWAP= ; }
        [[ -z ${PATH_SWAP} ]] && { PATH_SWAP="/memory/data/from/3" && [[ -d ${PATH_SWAP} && -w ${PATH_SWAP} ]] || PATH_SWAP= ; }
        [[ -z ${PATH_SWAP} ]] && { PATH_SWAP="/memory/data/from/2" && [[ -d ${PATH_SWAP} && -w ${PATH_SWAP} ]] || PATH_SWAP= ; }
        [[ -z ${PATH_SWAP} ]] && { PATH_SWAP="/memory/data/from/1" && [[ -d ${PATH_SWAP} && -w ${PATH_SWAP} ]] || PATH_SWAP= ; }
        [[ -z ${PATH_SWAP} ]] && { PATH_SWAP="/memory/data/from/0" && [[ -d ${PATH_SWAP} && -w ${PATH_SWAP} ]] || PATH_SWAP= ; }
        if [[ -n ${PATH_SWAP} ]]; then
            install -dm700 "${PATH_SWAP}/swap"
            if [[ -f ${ROOTFS}/etc/swapspace.conf ]]; then
                [[ $(cat ${ROOTFS}/etc/swapspace.conf) =~ (^|$'\n')"swappath=\"${PATH_SWAP}/swap\""($|$'\n') ]] \
                    || sed "/^swappath=/d;/#swappath=/a\swappath=\"${PATH_SWAP}/swap\"" -i ${ROOTFS}/etc/swapspace.conf
#                    || sed "/^swappath=/d;0,/#swappath=/!b;//a\swappath=\"${PATH_SWAP}/swap\"" -i ${ROOTFS}/etc/swapspace.conf
                [[ $(cat ${ROOTFS}/etc/swapspace.conf) =~ (^|$'\n')"swappath=\"${PATH_SWAP}/swap\""($|$'\n') ]] \
                    || sed "\$a\swappath=\"${PATH_SWAP}/swap\"" -i ${ROOTFS}/etc/swapspace.conf
            else
                echo "swappath=\"${PATH_SWAP}/swap\"" >> ${ROOTFS}/etc/swapspace.conf
            fi
        fi
    fi
}

################
##### MAIN #####
################

    exec_swapspace $@