Debian Ports

    # /usr/share/debootstrap/scripts/debian-ports

    SUITE="unstable"
    DEF_MIRROR="http://ftp.debian-ports.org/debian"

    mirror_style release
    download_style apt
    finddebs_style from-indices
    variants - buildd fakechroot minbase scratchbox

    # use the debian-ports keyring if debian-ports-archive-keyring is installed
    #keyring /usr/share/keyrings/debian-archive-keyring.gpg
    keyring /usr/share/keyrings/debian-ports-archive-keyring.gpg
    # or the one installed 
    keyring /etc/apt/trusted.gpg

    # Install debian-ports-archive-keyring (priority: extra) along with the important packages on the target
    if [ -z "$ADDITIONAL" ]; then
        ADDITIONAL="debian-ports-archive-keyring"
    elif $(echo "$ADDITIONAL" | fgrep -qv 'debian-ports-archive-keyring'); then
        ADDITIONAL="${ADDITIONAL} debian-ports-archive-keyring"
    fi

    if doing_variant fakechroot; then
        test "$FAKECHROOT" = "true" || error 1 FAKECHROOTREQ "This variant requires fakechroot environment to be started"
    fi

    case $ARCH in
        alpha|ia64) LIBC="libc6.1" ;;
        kfreebsd-*) LIBC="libc0.1" ;;
        hurd-*)     LIBC="libc0.3" ;;
        *)          LIBC="libc6" ;;
    esac

    # overload download_indices from /usr/share/debootstrap/functions
    download_indices () {
        local mem_suite
            mk_download_dirs
            "$DOWNLOAD_INDICES" $(echo "$@" | tr ' ' '\n' | sort)
        mem_suite=$SUITE
            SUITE="unreleased" "$DOWNLOAD_INDICES" $(echo "$@" | tr ' ' '\n' | sort)
        SUITE=$mem_suite
    }

    # add unreleased

    add_fake_component () {
        local TEMP_COMPONENTS
        local m2 c c1 path1 pkgdest1 path2 pkgdest2

        components_wo_unreleased=$(echo $COMPONENTS|tr ' ' '\n'|\
            sort|uniq|tr '\n' ' ')
        TEMP_COMPONENTS="$components_wo_unreleased"

        for m2 in $MIRRORS; do
            for c in $components_wo_unreleased; do
                            path1="dists/unreleased/$c/binary-$ARCH/Packages"
                            pkgdest1="$TARGET/$($DLDEST pkg "unreleased" "$c" "$ARCH" "$m2" "$path1")"
    # Fake component unreleased
                c1="${c}unreleased"
                path2="dists/$SUITE/$c1/binary-$ARCH/Packages"
                pkgdest2="$TARGET/$($DLDEST pkg "$SUITE" "$c1" "$ARCH" "$m2" "$path2")"
                ln -sf $(basename $pkgdest1) $pkgdest2
                TEMP_COMPONENTS="${TEMP_COMPONENTS} ${c1}"
            done
        done

        TEMP_COMPONENTS="$(echo $TEMP_COMPONENTS|tr ' ' '\n'|sort|uniq|tr '\n' ' ')"
        if [ "$TEMP_COMPONENTS" != "$components_wo_unreleased" ] ; then
            COMPONENTS="$TEMP_COMPONENTS"
        fi

    }

    work_out_debs () {

    # add a symlink for unreleased
        add_fake_component

        required="$(get_debs Priority: required)"

        if doing_variant - || doing_variant fakechroot; then
            #required="$required $(get_debs Priority: important)"
            #  ^^ should be getting debconf here somehow maybe
            base="$(get_debs Priority: important)"
        elif doing_variant buildd || doing_variant scratchbox; then
            base="apt build-essential"
        elif doing_variant minbase; then
            base="apt"
        fi

        if doing_variant fakechroot; then
            # ldd.fake needs binutils
            required="$required binutils"
        fi
    }

    # from /usr/share/debootstrap/scripts/sid unmodified
    first_stage_install () {
        extract $required

        mkdir -p "$TARGET/var/lib/dpkg"
        : >"$TARGET/var/lib/dpkg/status"
        : >"$TARGET/var/lib/dpkg/available"

        setup_etc
        if [ ! -e "$TARGET/etc/fstab" ]; then
            echo '# UNCONFIGURED FSTAB FOR BASE SYSTEM' > "$TARGET/etc/fstab"
            chown 0:0 "$TARGET/etc/fstab"; chmod 644 "$TARGET/etc/fstab"
        fi

        x_feign_install () {
            local pkg="$1"
            local deb="$(debfor $pkg)"
            local ver="$(extract_deb_field "$TARGET/$deb" Version)"

            mkdir -p "$TARGET/var/lib/dpkg/info"

            echo \
    "Package: $pkg
    Version: $ver
    Maintainer: unknown
    Status: install ok installed" >> "$TARGET/var/lib/dpkg/status"

            touch "$TARGET/var/lib/dpkg/info/${pkg}.list"
        }

        x_feign_install dpkg
    }

    # Remove the symlinks to unreleased
    clean_fake_component () {
        local m2 c c1 path pkgdest

        for m2 in $MIRRORS; do
                    for c in $components_wo_unreleased; do
                c1="${c}unreleased"
                path="dists/$SUITE/$c1/binary-$ARCH/Packages"
                            pkgdest="$TARGET/$($DLDEST pkg "$SUITE" "$c1" "$ARCH" "$m2" "$path")"
                if [ -h $pkgdest ] ; then
                    rm $pkgdest
                fi
            done
        done
    }

    second_stage_install () {
        setup_devices

        x_core_install () {
            smallyes '' | in_target dpkg --force-depends --install $(debfor "$@")
        }

        p () {
            baseprog="$(($baseprog + ${1:-1}))"
        }

        if doing_variant fakechroot; then
            setup_proc_fakechroot
        elif doing_variant scratchbox; then
            true
        else
            setup_proc
            in_target /sbin/ldconfig
        fi

        DEBIAN_FRONTEND=noninteractive
        DEBCONF_NONINTERACTIVE_SEEN=true
        export DEBIAN_FRONTEND DEBCONF_NONINTERACTIVE_SEEN

        baseprog=0
        bases=7

        p; progress $baseprog $bases INSTCORE "Installing core packages" #1
        info INSTCORE "Installing core packages..."

        p; progress $baseprog $bases INSTCORE "Installing core packages" #2
        ln -sf mawk "$TARGET/usr/bin/awk"
        x_core_install base-files base-passwd
        p; progress $baseprog $bases INSTCORE "Installing core packages" #3
        x_core_install dpkg

        if [ ! -e "$TARGET/etc/localtime" ]; then
            ln -sf /usr/share/zoneinfo/UTC "$TARGET/etc/localtime"
        fi

        if doing_variant fakechroot; then
            install_fakechroot_tools
        fi

        p; progress $baseprog $bases INSTCORE "Installing core packages" #4
        x_core_install $LIBC

        p; progress $baseprog $bases INSTCORE "Installing core packages" #5
        x_core_install perl-base

        p; progress $baseprog $bases INSTCORE "Installing core packages" #6
        rm "$TARGET/usr/bin/awk"
        x_core_install mawk

        p; progress $baseprog $bases INSTCORE "Installing core packages" #7
        if doing_variant -; then
            x_core_install debconf
        fi

        baseprog=0
        bases=$(set -- $required; echo $#)

        info UNPACKREQ "Unpacking required packages..."

        exec 7>&1

        smallyes '' |
            (repeatn 5 in_target_failmsg UNPACK_REQ_FAIL_FIVE "Failure while unpacking required packages.  This will be attempted up to five times." "" \
            dpkg --status-fd 8 --force-depends --unpack $(debfor $required) 8>&1 1>&7 || echo EXITCODE $?) |
            dpkg_progress $baseprog $bases UNPACKREQ "Unpacking required packages" UNPACKING

        info CONFREQ "Configuring required packages..."

        echo \
    "#!/bin/sh
    exit 101" > "$TARGET/usr/sbin/policy-rc.d"
        chmod 755 "$TARGET/usr/sbin/policy-rc.d"

        mv "$TARGET/sbin/start-stop-daemon" "$TARGET/sbin/start-stop-daemon.REAL"
        echo \
    "#!/bin/sh
    echo
    echo \"Warning: Fake start-stop-daemon called, doing nothing\"" > "$TARGET/sbin/start-stop-daemon"
        chmod 755 "$TARGET/sbin/start-stop-daemon"

        setup_dselect_method apt

        smallyes '' |
            (in_target_failmsg CONF_REQ_FAIL "Failure while configuring required packages." "" \
            dpkg --status-fd 8 --configure --pending --force-configure-any --force-depends 8>&1 1>&7 || echo EXITCODE $?) |
            dpkg_progress $baseprog $bases CONFREQ "Configuring required packages" CONFIGURING

        baseprog=0
        bases="$(set -- $base; echo $#)"

        info UNPACKBASE "Unpacking the base system..."

        setup_available $required $base
        done_predeps=
        while predep=$(get_next_predep); do
            # We have to resolve dependencies of pre-dependencies manually because
            # dpkg --predep-package doesn't handle this.
            predep=$(without "$(without "$(resolve_deps $predep)" "$required")" "$done_predeps")
            # XXX: progress is tricky due to how dpkg_progress works
            # -- cjwatson 2009-07-29
            p; smallyes '' |
            in_target dpkg --force-overwrite --force-confold --skip-same-version --install $(debfor $predep)
            base=$(without "$base" "$predep")
            done_predeps="$done_predeps $predep"
        done

        smallyes '' |
            (repeatn 5 in_target_failmsg INST_BASE_FAIL_FIVE "Failure while installing base packages.  This will be re-attempted up to five times." "" \
            dpkg --status-fd 8 --force-overwrite --force-confold --skip-same-version --unpack $(debfor $base) 8>&1 1>&7 || echo EXITCODE $?) |
            dpkg_progress $baseprog $bases UNPACKBASE "Unpacking base system" UNPACKING

        info CONFBASE "Configuring the base system..."

        smallyes '' |
            (repeatn 5 in_target_failmsg CONF_BASE_FAIL_FIVE "Failure while configuring base packages.  This will be re-attempted up to five times." "" \
            dpkg --status-fd 8 --force-confold --skip-same-version --configure -a 8>&1 1>&7 || echo EXITCODE $?) |
            dpkg_progress $baseprog $bases CONFBASE "Configuring base system" CONFIGURING

        mv "$TARGET/sbin/start-stop-daemon.REAL" "$TARGET/sbin/start-stop-daemon"

        rm -f "$TARGET/usr/sbin/policy-rc.d"

        progress $bases $bases CONFBASE "Configuring base system"
        info BASESUCCESS "Base system installed successfully."

    # remove the symlink to unreleased
        clean_fake_component 
    }

    # overload setup_apt_sources from /usr/share/debootstrap/functions
    setup_apt_sources () {
            mkdir -p "$TARGET/etc/apt"
            for m in "$@"; do
                    local cs=""
                    local cs1=""
                    for c in $components_wo_unreleased; do
                            local path="dists/$SUITE/$c/binary-$ARCH/Packages"
                            local pkgdest="$TARGET/$($DLDEST pkg "$SUITE" "$c" "$ARCH" "$m" "$path")"
                            if [ -e "$pkgdest" ]; then cs="$cs $c"; fi
    # "unreleased" archive
                            local path1="dists/unreleased/$c/binary-$ARCH/Packages"
                            local pkgdest1="$TARGET/$($DLDEST pkg unreleased "$c" "$ARCH" "$m" "$path1")"
                            if [ -e "$pkgdest1" ]; then cs1="$cs1 $c"; fi
                    done
                    if [ "$cs" != "" ]; then echo "deb $m $SUITE$cs"; fi
                    if [ "$cs1" != "" ]; then echo "deb $m unreleased$cs1"; fi
            done > "$TARGET/etc/apt/sources.list"
    }