#!/bin/bash
# ------------------------------------------------------------------------------
# Chroot system functions
# This file is part of the init.sh project
# Copyright (c) 2019-2022 Geoffray Levasseur <fatalerrors@geoffray-levasseur.org>
# ------------------------------------------------------------------------------
# This file is distributed under 3-clause BSD license.
# The complete license agreement can be obtained at:
# https://opensource.org/licenses/BSD-3-Clause
# ------------------------------------------------------------------------------


# ------------------------------------------------------------------------------
# If chrooted, we need to bootstrap to a new copy of our directory tree
chroot_bootstrap()
{
    if [[ ! -d "$CHROOT_PATH" ]]; then
        prnt E "The path given to chroot don't exists."
        die 14
    fi
    if [[ ! -d "$CHROOT_PATH/tmp" ]]; then
        prnt E "The target filesystem doesn't seems to be a valid installation."
        die 15
    fi

    local tmpdir=$(mktemp -d "$CHROOT_PATH/tmp/init.sh-XXXX")
    local bootstrap_items="conf lib modules repo bash.rc init.sh prepost.d"
    if [[ $RESUME == true ]]; then
        bootstrap_items="$bootstrap_items $STAGE_FILE"
    fi

    prnt I "Preparing root change."
    cp -av $bootstrap_items "$tmpdir"

    prnt I "Changing root and starting a fork of init.sh..."
    # on the following line, true allows to correctly exit in case of error since
    # errors are managed by the chrooted environment
    chroot "$CHROOT_PATH" /bin/bash -c 'CHROOT_DONE=true; "$tmpdir/init.sh" "$@"' || true

    # If stage file still exists we copy it to be able to resume later
    if [[ -e "$tmpdir/$(basename "$STAGE_FILE")" ]]; then
        cp "$tmpdir/$(basename "$STAGE_FILE")" "$STAGE_FILE"
    fi

    prnt I "Back to host system and clean up."
    rm -rf "$tmpdir"
}

# EOF