#!/usr/bin/bash

# Copyright (C) 2017-2020 Daniel Tartavel-jeannot   <contact@librepc.com>
#               2019-2020 Jean-Baptiste Biernacki   <j.biernacki@free.fr>
# Copyright (C) 2020      Neal Gompa                <ngompa13@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License,dnf or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

#Change the local to the most global
export LC_ALL=C

function timestamp() {
    date "+[%H:%M:%S]"
}

function cleanExit(){
    if [ 0 -ne ${#} ]; then
        if [ 0 -ne ${1} ]; then
            warning "unmounting all mounted files before exit"
            unmountdevsysproc
            unmountingPartitions
            unloopingImage
        fi
    fi
    
    exit $@
}

function WaitToContinue() {
    read -p "Break... Press [ENTER] to continue." GARBAGE
}

function title() {
    echo -e "\e[1;32m$(timestamp) ${1}\e[0m"
}

function print_info() {
    echo -e "\e[36m$(timestamp) ${1}\e[0m"
}

function warning() {
    echo -e "\e[1;35m$(timestamp) ${1}\e[0m"
}

function error() {
    echo -e "\e[1;31m$(timestamp) ${1}\e[0m"
}


function check_environment() {
    if [ "x${INSTALL_METHOD}" == "xurpmi" ]; then
        hash /usr/sbin/urpmi
        if [ 0 -ne ${?} ]; then
            error "urpmi is missing."
        fi
    elif [ "x${INSTALL_METHOD}" == "xurpmi" ]; then
        hash /usr/bin/dnf
        if [ 0 -ne ${?} ]; then
            error "dnf is missing."
        fi
    fi
    ### TODO add other environmnet things, like : from function createchroot()
}

function verify_disk_space() {
    title "Verifying if there is enough space on disk to make the image"
    DISK_SPACE=$(/usr/bin/df -BG --output=avail "${INSTALL_PATH}"  | sed '1d;s/[^0-9]//g')
    print_info "Free disk space: ${DISK_SPACE}G"
    if [ ${DISK_SPACE} -lt ${IMAGE_SIZE} ]; then
        warning "image size is greater than disk space"
        print_info "correct the problem and relaunch the script with parameter --create-rpi-image"
        print_info "${0} --size ${IMAGE_SIZE} --create-rpi-image"
        return 1
    fi
    return 0
}


# creation of install path and copy of qemu ( installing it if not yet installed )
function createchroot() {
    title "Making chroot"
    if ! [ -f /usr/share/distribution-gpg-keys/mageia/RPM-GPG-KEY-Mageia ]; then
        title "distribution-gpg-keys package not present : installing distribution-gpg-keys"
        #/usr/bin/dnf --assumeyes --setopt=install_weak_deps=False install distribution-gpg-keys
        installhostpkg "distribution-gpg-keys" "--setopt=install_weak_deps=False"
        if [ ${?} -ne 0 ]; then
            error "line ${LINENO} can't install distribution-gpg-keys : exiting"
            cleanExit ${ERR_1}
        fi
    fi

    if [ `arch` != "${ARM_VERSION}" ]; then 
        if ! [ -f /usr/bin/qemu-arm-static ]; then
            title "Qemu package not present : installing qemu packages"
            #/usr/bin/dnf --assumeyes --setopt=install_weak_deps=False install qemu-user-static
            installhostpkg "qemu-user-static" "--setopt=install_weak_deps=False"
            if [ ${?} -ne 0 ]; then
                error "line ${LINENO} can't install qemu-user-static : exiting"
                cleanExit ${ERR_1}
            fi
        fi
        # Starting qemu service if not started
        print_info "check systemd-binfmt service : "
        /usr/bin/systemctl is-active systemd-binfmt.service
        if  [ ${?} -ne 0 ]; then
            title "Starting systemd-binfmt.service"
            /usr/bin/systemctl start systemd-binfmt.service
            if [ ${?} -ne 0 ]; then
                error "line ${LINENO} can't start qemu-user-static : exiting"
                cleanExit ${ERR_1}
            fi
        fi
    fi
    return 0
}

# enabling extra Mageia repositories
function genusemirroroptions() {

    DNF_MIRROROPTS="--config=${DNF_CONFIGPATH} --forcearch=${ARM_VERSION} --nogpgcheck --releasever=${MAGEIA_VERSION}"
    if [ ! -z "${MIRROR}" ]; then
        DNF_MIRROROPTS="${DNF_MIRROROPTS} --disablerepo=* --repofrompath=mgarel,${MIRROR}/media/core/release/ --enablerepo=mgarel"
        if [ "${MAGEIA_VERSION}" != "cauldron" ]; then
            DNF_MIRROROPTS="${DNF_MIRROROPTS} --repofrompath=mgaup,${MIRROR}/media/core/updates/ --enablerepo=mgaup"
        fi
        if [ ${NONFREE} -eq 1 ]; then
            DNF_MIRROROPTS="${DNF_MIRROROPTS} --repofrompath=mgarel-nonfree,${MIRROR}/media/nonfree/release/ --enablerepo=mgarel-nonfree "
            if [ "${MAGEIA_VERSION}" != "cauldron" ]; then
                DNF_MIRROROPTS="${DNF_MIRROROPTS} --repofrompath=mgaup-nonfree,${MIRROR}/media/nonfree/updates/ --enablerepo=mgaup-nonfree"
            fi
        fi
        if [ ${TAINTED} -eq 1 ]; then
            DNF_MIRROROPTS="${DNF_MIRROROPTS} --repofrompath=mgarel-tainted,${MIRROR}/media/tainted/release/ --enablerepo=mgarel-tainted "
            if [ "${MAGEIA_VERSION}" != "cauldron" ]; then
                DNF_MIRROROPTS="${DNF_MIRROROPTS} --repofrompath=mgaup-tainted,${MIRROR}/media/tainted/updates/ --enablerepo=mgaup-tainted"
            fi
        fi
    fi
    export DNF_MIRROROPTS
    enableextrarepos
    return 0
}

# enabling extra Mageia repositories
function enableextrarepos() {
    extrasect_baseprefix="mageia"
#   if [ "${MAGEIA_VERSION}" = "cauldron" ]; then
#       extrasect_baseprefix="cauldron"
#       extrasect_updatesprefix=""
#   else
#       extrasect_baseprefix="mageia"
    extrasect_updatesprefix="updates"
 #   fi
    if [ ${NONFREE} -eq 1 ]; then
        title "activating non-free repos"
        DNFPARAM=--installroot="${BUILD_PATH}" config-manager --set-enabled "${extrasect_baseprefix}-${ARM_VERSION}-nonfree"
        if [ "${MAGEIA_VERSION}" != "cauldron" ]; then
            DNFPARAM=$DNFPARAM" --set-enabled ${extrasect_updatesprefix}-${ARM_VERSION}-nonfree"
        fi
        /usr/bin/dnf $DNFPARAM
        err=${?}
        if [ ${err} -ne 0 ]; then
            error "line ${LINENO} error ${err} - can't activate nonfree repositories : exiting"
            cleanExit ${ERR_1}
        fi
    fi
    if [ ${TAINTED} -eq 1 ]; then
        title "activating tainted repos"
        DNFPARAM=--installroot="${BUILD_PATH}" config-manager --set-enabled "${extrasect_baseprefix}-${ARM_VERSION}-tainted"
        if [ "${MAGEIA_VERSION}" != "cauldron" ]; then
            DNFPARAM=$DNFPARAM" --set-enabled ${extrasect_updatesprefix}-${ARM_VERSION}-tainted"
        fi
        /usr/bin/dnf $DNFPARAM
        err=${?}
        if [ ${err} -ne 0 ]; then
            error "line ${LINENO} error ${err} - can't activate tainted repositories : exiting"
            cleanExit ${ERR_1}
        fi
    fi
    return 0
}

# adding Mageia urpmi repositories
function addurpmimedia() {
    title "Creating media ${MIRROR}"

    print_info "Removing old media"
    /sbin/urpmi.removemedia --urpmi-root  "${BUILD_PATH}" -a

    print_info "Adding media"
    if [ ! -z "${MIRROR}" ] ; then
        echo ${MIRROR} | grep ${ARCH} 2>&1 1>/dev/null
        if [ 0 -eq ${?} ]; then
            /sbin/urpmi.addmedia --urpmi-root  "${BUILD_PATH}" --ignorearch --distrib "${MIRROR}"
        else
            /sbin/urpmi.addmedia --urpmi-root  "${BUILD_PATH}" --ignorearch --distrib "${MIRROR}/${ARCH}"            
        fi
    else
        print_info "MIRROR variable not set, using mirrorlist."
        /sbin/urpmi.addmedia --urpmi-root  "${BUILD_PATH}" --ignorearch --distrib --mirrorlist "http://mirrors.mageia.org/api/mageia.${MAGEIA_VERSION}.${ARM_VERSION}.list"
    fi

    err=${?}
    if [ ${err} -ne 0 ]; then
        error "line ${LINENO} error ${err} - can't add medias from ${MIRROR} : exiting"
        cleanExit ${ERR_1}
    fi
    if [ ${NONFREE} -eq 1 ]; then
        title "activating non-free repos"
        /sbin/urpmi.update --urpmi-root  "${BUILD_PATH}" --no-ignore Nonfree\ Release Nonfree\ Updates
        err=${?}
        if [ ${err} -ne 0 ]; then
            error "line ${LINENO} error ${err} - can't activate medias nonfree : exiting"
            cleanExit ${ERR_1}
        fi
    fi
    if [ ${TAINTED} -eq 1 ]; then
        title "activating tainted repos"
        /sbin/urpmi.update --urpmi-root  "${BUILD_PATH}" --no-ignore Tainted\ Release Tainted\ Updates
        err=${?}
        if [ ${err} -ne 0 ]; then
            error "line ${LINENO} error ${err} - can't activate medias tainted : exiting"
            cleanExit ${ERR_1}
        fi
    fi
    return 0
}

function updateurpmmirror() {
    title "updating mirror"
    /sbin/urpmi.update -a --urpmi-root "${BUILD_PATH}"
    if [ ${?} -ne 0 ]; then
        error "line ${LINENO} can't update mirrors : exiting"
        cleanExit ${ERR_1}
    fi
    return 0
}

function installbasesystem() {
    # Create Build path
    if ! [ -d "${BUILD_PATH}" ]; then
        warning "Build path ( ${BUILD_PATH} ) does not exist, do you want to create it ? [Y|n] "
        read yn
        if [ -z ${yn} ] || [ ${yn} = "Y" ] || [ ${yn} = "y" ]; then
            title "Creating ${BUILD_PATH}"
            /usr/bin/mkdir -p "${BUILD_PATH}/usr/bin" "${BUILD_PATH}/usr/lib/binfmt.d"
            if [ ${?} -ne 0 ]; then
                error "line ${LINENO} can't create ${BUILD_PATH} : exiting"
                cleanExit ${ERR_1}
            fi
        else
            cleanExit ${ERR_1}
        fi
    else
        print_info "Build path exists"
    fi

    # Workaround mga#26044.
    print_info "Preparing root filesystem tree"
    mkdir -p "${BUILD_PATH}/usr/bin"
    mkdir -p "${BUILD_PATH}/usr/sbin"
    mkdir -p "${BUILD_PATH}/usr/lib"
    ln -sr "${BUILD_PATH}/usr/bin" "${BUILD_PATH}/bin"
    ln -sr "${BUILD_PATH}/usr/sbin" "${BUILD_PATH}/sbin"
    ln -sr "${BUILD_PATH}/usr/lib" "${BUILD_PATH}/lib"
    if [ "${ARM_VERSION}" = "aarch64" ]; then
        mkdir -p "${BUILD_PATH}/usr/lib64"
        ln -sr "${BUILD_PATH}/usr/lib64" "${BUILD_PATH}/lib64"
    fi

    title "installing basesystem"
    installpkg "shadow-utils basesystem-minimal"
    if [ ${?} -ne 0 ]; then
        error "line ${LINENO} error installing shadow-utils or basesystem-minimal : exiting"
        cleanExit ${ERR_1}
    fi
    if [ ${INSTALL_METHOD} = "urpmi" ]; then
        installpkg "urpmi locales"
    else
        installpkg "dnf dnf-plugins-core locales"
    fi
    return 0
}

function installhostpkg() {
    if [ ${INSTALL_METHOD} = "urpmi" ]; then
        /usr/sbin/urpmi --auto $3 $1;
    else
        /usr/bin/dnf $2 ${DNF_MIRROROPTS} --assumeyes install $1;
    fi
}

function installpkg() {
    if [ ${INSTALL_METHOD} = "urpmi" ]; then
        /usr/sbin/urpmi --urpmi-root "${BUILD_PATH}" --root "${BUILD_PATH}" --ignorearch --no-verify-rpm --auto --split-level 200 --split-length 200 $3 $1;
    else
        /usr/bin/dnf $2 --installroot="${BUILD_PATH}" ${DNF_MIRROROPTS} --assumeyes install $1;
    fi

}

function preparechroot() {
    title "Preparing chrooting in ${BUILD_PATH}"

    print_info "making /etc/hostname"
    echo "${HOSTNAME:="localhost.localdomain"}" > "${BUILD_PATH}/etc/hostname"

    print_info "copying second stage script in ${BUILD_PATH}"

    cp --preserve=mode "${CONFIG_PATH}/second_stage_install.sh" "${BUILD_PATH}/second_stage_install.sh"
    if [ ${?} -ne 0 ]; then
        error "line ${LINENO} error copying ${CONFIG_PATH}/second_stage_install.sh : exiting"
        cleanExit ${ERR_1}
    fi
    print_info "configuring second_stage_install.sh for ${INSTALL_METHOD}"
    if [ ${INSTALL_METHOD} = "urpmi" ]; then
        sed -i -e "s/<INSTALL_EXEC>/sbin\/urpmi --no-verify-rpm --auto --split-length 0/g" "${BUILD_PATH}/second_stage_install.sh"
    else
        sed -i -e "s/<INSTALL_EXEC>/bin\/dnf --nogpgcheck --assumeyes install/g" "${BUILD_PATH}/second_stage_install.sh"
    fi

    print_info "Preparation for setting root and user account"
    if [ -n "${ROOT_PWD}" ]; then #If root password defined, it will be setted at the end of the chroot of the second_stage_install.sh script
        echo -e "/usr/bin/passwd << EOF\n${ROOT_PWD}\n${ROOT_PWD}\nEOF\n" >>"${BUILD_PATH}/second_stage_install.sh"
    else
        print_info "No root password... One password will be set at the first login."
        echo -e "/usr/bin/passwd -d root\n/usr/bin/passwd -e root\n" >>"${BUILD_PATH}/second_stage_install.sh"
    fi

    if [ -n "${ID_USER}" ]; then #If user ID defined, it will be setted at the end of the chroot of the second_stage_install.sh script
        echo -e "    /sbin/useradd ${ID_USER}\n" >>"${BUILD_PATH}/second_stage_install.sh"
        if [ -n "${PASSWORD}" ]; then
            echo -e "/usr/bin/passwd ${ID_USER} << EOF\n${PASSWORD}\n${PASSWORD}\nEOF" >>"${BUILD_PATH}/second_stage_install.sh"
        else
            echo -e "/usr/bin/passwd -d ${ID_USER}\n" >>"${BUILD_PATH}/second_stage_install.sh"
        fi
    else
        print_info "No user defined, no user account created."
    fi

    postPrepareChroot
    if [ ${?} -ne 0 ]; then
        error "line ${LINENO} error in postPrepareChroot function."
        cleanExit ${ERR_1}
    fi
    return 0
}

function mountdevsysproc(){
    print_info "mounting dev, sys, proc directories in chroot"
    /usr/bin/mount -B /dev "${BUILD_PATH}/dev"
#     mkdir ${BUILD_PATH}/dev
#     ln -s ${DEVICE} ${BUILD_PATH}/dev/loop0
#     if [ 1 -eq ${SEPARATE_BOOT_PARTITION} ]; then
#         ln -s ${BOOTP} ${BUILD_PATH}/dev/loop0p1
#         ln -s ${ROOTP} ${BUILD_PATH}/dev/loop0p2
#     else
#         ln -s ${ROOTP} ${BUILD_PATH}/dev/loop0p1
#     fi
    if [ ${?} -ne 0 ]; then
            error "line ${LINENO} error mounting ${BUILD_PATH}/dev : exiting"
            cleanExit ${ERR_1}
    fi
    MOUNTED_DEV=true
    /usr/bin/mount -B /sys "${BUILD_PATH}/sys"
    if [ ${?} -ne 0 ]; then
            error "line ${LINENO} error mounting ${BUILD_PATH}/sys : exiting"
            cleanExit ${ERR_1}
    fi
    MOUNTED_SYS=true
    /usr/bin/mount -B /proc "${BUILD_PATH}/proc"
    if [ ${?} -ne 0 ]; then
            error "line ${LINENO} error mounting ${BUILD_PATH}/proc : exiting"
            cleanExit ${ERR_1}
    fi
    MOUNTED_PROC=true
    return 0
}

function unmountdevsysproc(){
    print_info "unmounting dev, sys, proc"
#     LIST_MOUNTED=$(/usr/bin/mount -l | grep mageia4arm)
    if [ ${MOUNTED_DEV:=false} = true ]; then
        /usr/bin/umount -lf "${BUILD_PATH}/dev"
        if [ ${?} -ne 0 ]; then
            warning "line ${LINENO} Warning : error unmounting ${BUILD_PATH}/dev, continuing anyway"
            ERRORN=$((${ERRORN}+1))
        fi
    fi
    if [ ${MOUNTED_PROC:=false} = true ]; then
        /usr/bin/umount -lf "${BUILD_PATH}/proc"
        if [ ${?} -ne 0 ]; then
            warning "line ${LINENO} Warning : error unmounting ${BUILD_PATH}/proc, continuing anyway"
            ERRORN=$((${ERRORN}+1))
        fi
    fi
    if [ ${MOUNTED_SYS:=false} = true ]; then
        /usr/bin/umount -lf "${BUILD_PATH}/sys"
        if [ ${?} -ne 0 ]; then
            warning "line ${LINENO} Warning : error unmounting ${BUILD_PATH}/sys, continuing anyway"
            ERRORN=$((${ERRORN}+1))
        fi
    fi
    return 0
}

function jumpchroot() {
    title "chrooting to ${BUILD_PATH}"
    
    mountdevsysproc
    
    print_info "Copying resolv.conf"
    /usr/bin/cp -v --preserve=mode /etc/resolv.conf "${BUILD_PATH}/etc/"
    if [ ${?} -ne 0 ]; then
        error "line ${LINENO} error copying ${BUILD_PATH}/etc/resolv.conf : exiting"
        cleanExit ${ERR_1}
    fi
    
    print_info "chrooting to ${BUILD_PATH}"
    if [ "$OPT" = "chroot" ]; then
        print_info "/sbin/chroot ${BUILD_PATH}"
        /sbin/chroot "${BUILD_PATH}"
        RET=${?}
        if [ ${RET} -ne 0 ]; then
            error "line ${LINENO} Warning : chrooting to ${BUILD_PATH} retrurn an error ${RET}"
            ERRORN=$((${ERRORN}+1))
        fi
    else
        print_info "/sbin/chroot --userspec root:root ${BUILD_PATH} /usr/bin/bash -v -c 'bash /second_stage_install.sh 2>&1'"
        /sbin/chroot --userspec root:root "${BUILD_PATH}" /usr/bin/bash -v -c 'bash /second_stage_install.sh 2>&1'
        RET=${?}
        if [ ${RET} -ne 0 ]; then
            error "line ${LINENO} Warning : chrooting to ${BUILD_PATH} retrurn an error ${RET}"
            ERRORN=$((${ERRORN}+1))
        fi
    fi

    unmountdevsysproc
    
    return 0
}


function createImageWrap() {
    title "Wrap image creation"
    preImgCreation
    if [ ${?} -ne 0 ]; then
        error "line ${LINENO} error in the process ${CONFIG_PATH}/specialFunctions.sh ."
        cleanExit ${ERR_1}
    fi
    createimage
        
#     loopingImage

    partitionningimage
    
    BOOTFS=${BOOTFS:="ext4"}
    formatpartitions ${BOOTFS} ext4
    
    loopingImage

    return 0
}

function createimage() {
    title "Createimage"
    print_info "will be the file : ${INSTALL_PATH}/${IMAGE}"
    if [ -f "${INSTALL_PATH}/${IMAGE}" ]; then
        warning "Deleting previous image"
        /usr/bin/rm -f "${INSTALL_PATH}/${IMAGE}"
        if [ ${?} -ne 0 ]; then
            error "line ${LINENO} error can't remove previous image at ${INSTALL_PATH}/${IMAGE} : exiting"
            cleanExit ${ERR_1}
        fi
    fi

#     warning "please wait until end of image creation"
#     /usr/bin/dd if=/dev/zero of="${INSTALL_PATH}/${IMAGE}" bs=1MB count=$(( ${IMAGE_SIZE} * 1024 )) status=progress
    /usr/bin/truncate -s ${IMAGE_SIZE}G "${INSTALL_PATH}/${IMAGE}"
    if [ ${?} -ne 0 ]; then
        error "line ${LINENO} can't make image at ${INSTALL_PATH}/${IMAGE} : exiting"
        cleanExit ${ERR_1}
    fi
    /usr/bin/chown ${USER}:${USER} "${INSTALL_PATH}/${IMAGE}"

    return 0
}


function partitionningimage() {
    title "Partitionning image"

#     if [ "x" != "${FDISK_SCRIPT:="x"}" ]; then
#         echo -e "${FDISK_SCRIPT}" | /sbin/fdisk ${DEVICE}
#     el
    if  [ "x" != "${SFDISK_SCRIPT:="x"}" ]; then
        HDD_INFO="$(echo -e "${SFDISK_SCRIPT}" | /usr/sbin/sfdisk "${INSTALL_PATH}/${IMAGE}")"
        echo "${HDD_INFO}"
        SECTOR_SIZE="$(echo "${HDD_INFO}" | grep -m1 "Units: sectors" | sed -e 's/^.* \([[:digit:]]\+\) bytes[[:space:]]*$/\1/')"
        if [ 1 -eq ${SEPARATE_BOOT_PARTITION} ]; then
            BOOT_P_INFO=$(echo "${HDD_INFO}" | grep -m1 -A3 "^Device" | grep "${IMAGE}1" | tr '*' ' ' | sed -e 's/[[:space:]]\+/ /g')
            ROOT_P_INFO=$(echo "${HDD_INFO}" | grep -m1 -A3 "^Device" | grep "${IMAGE}2" | tr '*' ' ' | sed -e 's/[[:space:]]\+/ /g')
            BOOT_OFFSET_S="$(echo "${BOOT_P_INFO}" | sed -e "s/^.*${IMAGE}[[:digit:]][[:space:]\*]\+//g" | cut -d ' ' -f 1)"
            BOOT_NB_SECTORS=$(echo "${BOOT_P_INFO}" | sed -e "s/^.*${IMAGE}[[:digit:]][[:space:]\*]\+//g" | cut -d ' ' -f 3)
            BOOT_SIZE_KB="$((${SECTOR_SIZE}*${BOOT_NB_SECTORS}/1024))"
            BOOT_SIZE_B="$((${SECTOR_SIZE}*${BOOT_NB_SECTORS}))"
            BOOT_OFFSET_KB="$((${SECTOR_SIZE}*${BOOT_OFFSET_S}/1024))"
            print_info "Boot offset : ${BOOT_OFFSET_S}"
            print_info "Boot offset (kB) : ${BOOT_OFFSET_KB}"
            print_info "Boot sectors : ${BOOT_NB_SECTORS}"
            print_info "Boot size (kB) : ${BOOT_SIZE_KB}"
            print_info "Boot size (B) : ${BOOT_SIZE_B}"
        else
            ROOT_P_INFO=$(echo "${HDD_INFO}" | grep -m1 -A3 "^Device" | grep "${IMAGE}1")
        fi
        ROOT_OFFSET_S=$(echo "${ROOT_P_INFO}" | sed -e "s/^.*${IMAGE}[[:digit:]][[:space:]\*]\+//g" | cut -d ' ' -f 1)
        ROOT_NB_SECTORS=$(echo "${ROOT_P_INFO}" | sed -e "s/^.*${IMAGE}[[:digit:]][[:space:]\*]\+//g" | cut -d ' ' -f 3)
        ROOT_SIZE_KB="$((${SECTOR_SIZE}*${ROOT_NB_SECTORS}/1024))"
        ROOT_OFFSET_B="$((${SECTOR_SIZE}*${ROOT_OFFSET_S}))"
        
        print_info "Root offset : ${ROOT_OFFSET_S}"
        print_info "Root offset (B) : ${ROOT_OFFSET_B}"
        print_info "Root sectors : ${ROOT_NB_SECTORS}"
        print_info "Root size kB : ${ROOT_SIZE_KB}"
    else
        error "Error, no partitionning script found."
	cleanExit ${ERR_1}
    fi

    return 0
}

function loopingImage() {
    title "Looping image ..."

    if ! [ -x /usr/bin/udisksctl ]; then
        error "Error, udisks2 is missing."
        cleanExit ${ERR_1}
    fi

    # Mettre en place et contrôler des périphériques boucle.
    # -f, --find                    trouver le premier périphérique inutilisé
    # --show                    afficher le nom du périphérique après configuration (avec -f)
#     DEVICE=$(/usr/sbin/losetup -f --show "${INSTALL_PATH}/${IMAGE}")
    DEVICE=$(/usr/bin/udisksctl loop-setup -f ${INSTALL_PATH}/${IMAGE} | sed -e 's/^.*\/dev\//\/dev\//' -e 's/\.$//')
    if [ -z "${DEVICE}" ]; then
        error "Error, device missing from udisksctl loop-setup output."
        cleanExit ${ERR_1}
    fi

    print_info "Image looped on ${DEVICE}"
    
    
    #Previous function give us a list of partition. It is easy to get it and define prior this list the partition.
    #But... How to distinguish between the boot p1 and the root p2 if both are empty and ext4 ? ...

    if [ 1 -eq ${SEPARATE_BOOT_PARTITION} ]; then
        BOOTP="${DEVICE}p1"
        ROOTP="${DEVICE}p2"
        
#         BOOT_UUID=$(/usr/sbin/blkid -s UUID -o value UUID "${BOOTP}")
        BOOT_UUID=$(/usr/bin/lsblk -n -o UUID "${BOOTP}")
        print_info "Boot UUID: ${BOOT_UUID}"
    else
        ROOTP="${DEVICE}p1"
    fi
    
#     ROOT_UUID=$(/usr/sbin/blkid -s UUID -o value UUID "${ROOTP}")
    ROOT_UUID=$(/usr/bin/lsblk -n -o UUID "${ROOTP}")
    print_info "Root UUID: ${ROOT_UUID}"
    
    return 0
}


function formatpartitions() {
    print_info "Formatting partitions"
    if [ 1 -eq ${SEPARATE_BOOT_PARTITION} ]; then
        print_info "Boot : ${BOOTP} as ${1}"
        if [ "vfat" = ${1} ]; then
            temporary=$(mktemp)
            truncate -s ${BOOT_SIZE_B} ${temporary}
            FSINFO=$(/usr/sbin/mkfs.vfat -v ${temporary} ) # $((${BOOT_SIZE_KB})))
            /usr/bin/dd seek=${BOOT_OFFSET_S} if=${temporary} of=${INSTALL_PATH}/${IMAGE}
            BOOT_UUID=$(echo "${FSINFO}" | grep 'Volume ID is' | sed 's/Volume ID is \([[:alnum:]]*\),.*$/\1/')
            print_info "Boot UUID = ${BOOT_UUID}"
            rm -f ${temporary}
        else
            FSINFO=$(yes | /usr/sbin/mkfs.ext4 -E offset=${BOOT_OFFSET_B} ${INSTALL_PATH}/${IMAGE} $((${BOOT_SIZE_KB}))k)
            BOOT_UUID=$(echo "${FSINFO}" | grep 'Filesystem UUID' | sed 's/Filesystem UUID: //')
        fi
#         "/sbin/mkfs.${1}" "${BOOTP}"
        if [ ${?} -ne 0 ]; then
            error "line ${LINENO} error formating ${BOOTP} : exiting"
#             /usr/sbin/losetup -d "${DEVICE}"
            udisksctl unmount -b ${BOOTP}
            cleanExit ${ERR_1}
        fi
#         BOOT_UUID=$(/usr/sbin/blkid -s UUID -o value UUID "${BOOTP}")
#         print_info "Boot UUID: ${BOOT_UUID}"
    fi

    print_info "Root : ${ROOTP} as ${2}"
#     "/sbin/mkfs.${2}" "${ROOTP}"
    echo /usr/sbin/mkfs.ext4 -E offset=${ROOT_OFFSET_B} ${INSTALL_PATH}/${IMAGE} $((${ROOT_SIZE_KB}))k
    FSINFO=$(yes | /usr/sbin/mkfs.ext4 -E offset=${ROOT_OFFSET_B} ${INSTALL_PATH}/${IMAGE} $((${ROOT_SIZE_KB}))k)
    if [ ${?} -ne 0 ]; then
        error "line ${LINENO} error formating ${ROOTP} : exiting"
#         /usr/sbin/losetup -d "${DEVICE}"
#         udisksctl unmount -b ${ROOTP}
        cleanExit ${ERR_1}
    fi
    ROOT_UUID=$(echo "${FSINFO}" | grep 'Filesystem UUID' | sed 's/Filesystem UUID: //')
#     ROOT_UUID=$(/usr/sbin/blkid -s UUID -o value UUID "${ROOTP}")
    print_info "Root UUID: ${ROOT_UUID}"

    return 0
}

function generateExtlinux() {
    print_info "Generate extlinux if extlinux.conf exists."
    if [ -e "${CONFIG_PATH}/extlinux.conf" ]; then
        print_info "\tFound extlinux.conf"
        if [ ! -d "${BUILD_PATH}/boot/extlinux" ]; then
            print_info "making /boot/extlinux/extlinux.conf"
            /usr/bin/rm -rf "${BUILD_PATH}/boot/extlinux"
            mkdir -p "${BUILD_PATH}/boot/extlinux"
        fi
#         if [ ! -f "${BUILD_PATH}/boot/extlinux/extlinux.conf" ]; then
            print_info "\tTuning extlinux.conf"
            cp "${CONFIG_PATH}/extlinux.conf" "${BUILD_PATH}/boot/extlinux/extlinux.conf"
            #In order to use the UUID, a initrd file is necessary.
            sed -i -e "s/<UUID>/${ROOT_UUID}/g" "${BUILD_PATH}/boot/extlinux/extlinux.conf"
            sed -i -e "s/<BOOT_ARGS>/${BOOT_ARGS}/g"  "${BUILD_PATH}/boot/extlinux/extlinux.conf"
            KERNEL_ID=$(basename ${BUILD_PATH}/usr/lib/linux-*)
            sed -i -e "s/<FDTDIR>/${KERNEL_ID}/g" "${BUILD_PATH}/boot/extlinux/extlinux.conf"
#         fi
    fi
}

function copyingsystem() {
    generateExtlinux

    print_info "Remove second_stage_install.sh"
    /usr/bin/rm -f "${BUILD_PATH}/second_stage_install.sh"
    
    ### BUG : rpi3b+64b is using a bootloader partition, in which only the bootloader lays. Here, everything is copying into.
    if [ 1 -eq ${SEPARATE_BOOT_PARTITION} ]; then
        ARM_BOOT="${BUILD_PATH}/mnt/arm_boot"
        if ! [ -d "${ARM_BOOT}" ]; then
            rm -rf "${ARM_BOOT}"
            mkdir -p "${ARM_BOOT}"
        fi
        print_info "copying Mageia image to root partition"
        /usr/bin/rsync -rlptogDH --exclude "${ARM_BOOT}/" --exclude "qemu-arm-static*" "${BUILD_PATH}/" "${ROOT}/"
        /usr/bin/rsync -rlptogDH "${ARM_BOOT}/" "${BOOT}/"
        #/usr/bin/rsync -rlptogDH "${BUILD_PATH}/boot/" "${BOOT}/"
    else
        print_info "copying Mageia image to root partition"
        /usr/bin/rsync -rlptogDH --exclude "qemu-arm-static*" "${BUILD_PATH}/" "${ROOT}/"
    fi

    copyingCustomSystem
    if [ ${?} -ne 0 ]; then
        error "line ${LINENO} error in the process ${CONFIG_PATH}/specialFunctions.sh ."
        cleanExit ${ERR_1}
    fi

    copyingcommon

    sync
#     warning "You can now burn the image ( ${INSTALL_PATH}/${IMAGE} ) on SD card"
#     print_info "pv \"${INSTALL_PATH}/${IMAGE}\" | dd of=/dev/mmcblk#"
    return 0
}


function mountPartitions() {
    title "mounting partitions, making mountpoint if necessary"

    ROOT=$(/usr/bin/udisksctl mount -b ${ROOTP} | sed -e 's/^.* at //' -e 's/\.$//' )
    if [ ${?} -ne 0 ]; then
        error "line ${LINENO} error mounting ${ROOTP} : exiting"
        cleanExit ${ERR_1}
    fi
    MOUNTED_ROOT=true
    print_info "Root partition mount in ${ROOT}"
    BUILD_PATH=${ROOT}
    
    if [ 1 -eq ${SEPARATE_BOOT_PARTITION} ]; then
        BOOT=$(/usr/bin/udisksctl mount -b ${BOOTP} | sed -e 's/^.* at //' -e 's/\.$//' )
        if [ ${?} -ne 0 ]; then
            error "line ${LINENO} error mounting ${BOOTP} : exiting"
            cleanExit ${ERR_1}
        fi
        print_info "boot partition mount in ${BOOT}"
        MOUNTED_BOOT=true
        
        mkdir -p "${BUILD_PATH}/boot/EFI"
        /usr/bin/mount -B ${BOOT} "${BUILD_PATH}/boot/EFI"
    fi
}


function unmountingPartitions() {
    title "Unmounting partitions..."

    # Syncing devices before unmounting
    /usr/bin/sync

    if [ -z "${BOOTP}" ] && [ -z "${ROOTP}" ] ; then
        warning "Root partition and Boot partition not defined !"

        for LOOP in $(/usr/sbin/losetup -l -O NAME,BACK-FILE -n | grep "${IMAGE}" | cut -d ' ' -f 1 ) ; do
            IFS=$'\n'
            for PARTITION in $(/usr/bin/mount -l | grep ${LOOP}); do
                MOUNTPOINT=$(echo "$PARTITION" | cut -d ' ' -f 3)
                PARTITION=$(echo "$PARTITION" | cut -d ' ' -f 1)
                print_info "unmount ${PARTITION}" # and remove ${MOUNTPOINT}"
                udisksctl unmount -b ${PARTITION}
#                 if [ ${?} -eq 0 ]; then
#                     /usr/bin/rmdir "${MOUNTPOINT}"
#                 else
#                     error "line ${LINENO} error unmounting ${BOOT}..."
#                 fi
                if [ 0 -ne ${?} ]; then
                    error "line ${LINENO} error unmounting ${PARTITION}..."
                fi
            done
            unset IFS
        done
    else
        if [ ${MOUNTED_BOOT:=false} = true ]; then
            umount "${BUILD_PATH}/boot/EFI"
            udisksctl unmount -b ${BOOTP}
            if [ 0 -ne ${?} ]; then
                error "line ${LINENO} error unmounting ${BOOTP}..."
            fi
            sync
            sleep 4s
        fi
        if [ ${MOUNTED_ROOT:=false} = true ]; then
            udisksctl unmount -b ${ROOTP}
            if [ 0 -ne ${?} ]; then
                error "line ${LINENO} error unmounting ${ROOT}..."
            fi
        fi
        
#         if [ ! -z "${BOOTP}" ]; then
#             udisksctl unmount -b ${BOOTP}
#             if [ ${?} -eq 0 ]; then
#                 /usr/bin/rmdir "${BOOT}"
#             else
#                 error "line ${LINENO} error unmounting ${BOOT}..."
#             fi
#         fi
#         udisksctl unmount -b ${ROOTP}
#         if [ ${?} -eq 0 ]; then
#             /usr/bin/rmdir "${ROOT}"
#         else
#             error "line ${LINENO} error unmounting ${ROOT}..."
#         fi
    fi
    return 0
}


function unloopingImage() {
    title "Unlooping image..."
    # Syncing devices before unmounting
    /usr/bin/sync
    
    if [ "x" != "${DEVICE:="x"}" ]; then
    /usr/bin/udisksctl loop-delete -b ${DEVICE}
    else
#     if [ 0 -ne ${?} ]; then
        warning "Unloop failed, try to unmount all partitions from the image..."
        print_info "Looped devices to unmount : $(/usr/sbin/losetup -l -O NAME,BACK-FILE -n | grep "${IMAGE}" | cut -d ' ' -f 1 ) "

        for LOOP in $(/usr/sbin/losetup -l -O NAME,BACK-FILE -n | grep "${IMAGE}" | cut -d ' ' -f 1 ) ; do
            for PARTITION in ${LOOP}p* ; do
                print_info "Unmount ${PARTITION}"
                udisksctl unmount -b ${PARTITION}
            done
            print_info "Unloop ${LOOP}"
            /usr/bin/udisksctl loop-delete -b ${LOOP}
        done
    fi

    return 0
}


# Copying files common to all systems
function copyingcommon() {
    title "Copying common files and configuration"
    rsync -rlptDH "${SOURCE_PATH}/common/" "${ROOT}/"
    rsync -rlptDH "${SOURCE_PATH}/tools/"*.sh "${ROOT}/usr/local/bin/"
    chown root:root "${ROOT}/usr/local/bin/"
    return 0
}


function mkfstab() {
    title "making /etc/fstab"
    # BUG : For installing kernel inside a chroot, the UUID of root partition is NOT found, Workaround to try : using ${ROOTP} instead.
    if [ 1 -eq ${SEPARATE_BOOT_PARTITION} ]; then
        echo -e "proc\t/proc\tproc\tdefaults\t0\t0\nUUID=${BOOT_UUID}\t/boot/EFI\t${BOOTFS}\tdefaults\t0\t0\nUUID=${ROOT_UUID}\t/\text4\tdefaults\t0\t0" > "${BUILD_PATH}/etc/fstab"
    else
        echo -e "proc\t/proc\tproc\tdefaults\t0\t0\nUUID=${ROOT_UUID}\t/\text4\tdefaults\t0\t0" > "${BUILD_PATH}/etc/fstab"
    fi
    return 0
}


# cleaning build space
function clean() {
    title "Cleaning"
    
    print_info "In case script failed or crash inside the chroot, need to unmount dev|sys|proc..."
    # TODO find what blocks the umount.

    unmountdevsysproc
    unmountingPartitions
    unloopingImage

    # removing old image
    print_info "Removing ${IMAGE_BASE}* files"
    /usr/bin/rm -f "${INSTALL_PATH}/${IMAGE_BASE}*.img"
    /usr/bin/rm -f "${INSTALL_PATH}/${IMAGE_BASE}*.gz"
    /usr/bin/rm -f "${INSTALL_PATH}/${IMAGE_BASE}*.md5"
    /usr/bin/rm -f "${INSTALL_PATH}/${IMAGE_BASE}*.sha512"
    /usr/bin/rm -f "${INSTALL_PATH}/${IMAGE_BASE}*.sha3"

    return 0
}


function check_extrapackage() {
    for i in ${PACKAGE} ; do
        /usr/bin/urpmq --urpmi-root "${BUILD_PATH}" --root "${BUILD_PATH}" --ignorearch --no-verify-rpm ${i}
        if [ 0 -ne ${?} ]; then
            warning "Package ${i} not found !"
        else
            PACKAGE_VALID+="${i} "
        fi
    done
    return 0
}

function extrapackage() {
    if [ "x${DESKTOP_TASK}" != "x" ]; then
        installpkg ${DESKTOP_TASK}
    fi
    installpkg "${PACKAGE_VALID}"
    return 0
}

function generateExtra() {
    #Set values by default to false.
    GEN_CHECKSUM=${GEN_CHECKSUM:="false"}
    GEN_GZ=${GEN_GZ:="false"}
    GEN_SIGN=${GEN_SIGN:="false"}
    if ${GEN_CHECKSUM} ; then 
        title "Generate checksum"
        md5sum "${INSTALL_PATH}/${IMAGE}" > "${INSTALL_PATH}/${IMAGE}.md5"
        sha512sum "${INSTALL_PATH}/${IMAGE}" > "${INSTALL_PATH}/${IMAGE}.sha512"
        sha384sum "${INSTALL_PATH}/${IMAGE}" > "${INSTALL_PATH}/${IMAGE}.sha3"
        print_info "${INSTALL_PATH}/${IMAGE}.md5"
        print_info "${INSTALL_PATH}/${IMAGE}.sha512"
        print_info "${INSTALL_PATH}/${IMAGE}.sha3"
    fi
    if ${GEN_GZ} ; then 
        title "Image compression"
        pv "${INSTALL_PATH}/${IMAGE}" | gzip -9 >"${INSTALL_PATH}/${IMAGE}.gz"
    fi
    if ${GEN_SIGN} ; then
        title "Signing checksums"
        pushd "${INSTALL_PATH}"
        if [ -e "${INSTALL_PATH}/${IMAGE}.md5"    ]; then
            gpg --sign ${IMAGE}.md5
        fi
        if [ -e "${INSTALL_PATH}/${IMAGE}.sha512" ]; then
            gpg --sign ${IMAGE}.sha512
        fi
        if [ -e "${INSTALL_PATH}/${IMAGE}.sha3"   ]; then
            gpg --sign ${IMAGE}.sha384
        fi
        popd
    fi
}

function preImgCreation() {
    error "This function is called if no sourced file about fdisk was lauched."
    return 1
}

function postPrepareChroot() {
    error "This function is called if no sourced file is containing postPrepareChroot function."
    return 1
}

function bunrningBootloader() {
    error "This function is called if no sourced file is containing bunrningBootloader function."
    return 1
}

function copyingCustomSystem() {
    error "This function is called if no sourced file is containing copyingCustomSystem function."
    return 1
}



ERRORN=0
ERR_1=1
ERR_DEFAULT_CONFIG=2
ERR_NO_CONFIG_FILE=3
ERR_NOT_ROOT=4
ERR_DEPENDENCY_MISSING=5
ERR_NO_SPACE=6
ERR_7=7
ERR_8=8
ERR_9=9

SEPARATE_BOOT_PARTITION=1