directory as root archlinux mkinitcpio hook. why? Because I want to install linux and Windows on same partition.

hooks_bedrock

#!/usr/bin/ash
# this file is at /etc/initcpio/hooks/bedrock

run_hook ()
{
    mount_handler="ramdisk_mount_handler"
}

ramdisk_mount_handler ()
{
    msg ":: mounting '$root' on dummy root"
    mkdir /dummy_root
    if ! mount -t "${rootfstype:-auto}" -o "${rwopt:-ro}${rootflags:+,$rootflags}" "$root" "/dummy_root"; then
        # shellcheck disable=SC2086
        run_hookfunctions 'run_emergencyhook' 'emergency hook' $EMERGENCYHOOKS
        err "Failed to mount '$root' on dummy root"
        echo "You are now being dropped into an emergency shell."
        # shellcheck disable=SC2119
        launch_interactive_shell
        msg "Trying to continue (this will most likely fail) ..."
    fi

    msg ":: mounting '/dummy_root/$rootdir' on real root"
    if ! mount --bind "/dummy_root/$rootdir" "$1"; then
            # shellcheck disable=SC2086
            run_hookfunctions 'run_emergencyhook' 'emergency hook' $EMERGENCYHOOKS
            err "Failed to mount '$root' on real root"
            echo "You are now being dropped into an emergency shell."
            # shellcheck disable=SC2119
            launch_interactive_shell
            msg "Trying to continue (this will most likely fail) ..."
    fi
}

install_bedrock

#!/usr/bin/env bash
# this file is at /etc/initcpio/install/bedrock

build() {
    add_runscript
}

help() {
    cat <<HELPEOF
HELPEOF
}

# vim: set ft=sh ts=4 sw=4 et:

add bedrock to /etc/mkinitcpio.conf HOOKS, rebuild initd sudo mkinitcpio -P