#!/bin/bash -
# supernested Makefile.am
# @configure_input@
# (C) Copyright 2014 Red Hat Inc.
#
# 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, 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, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# Written by Richard W.M. Jones <rjones@redhat.com>

unset CDPATH
set -e

supermin="@SUPERMIN@"
distro="@DISTRO@"
guestfish="@GUESTFISH@"

output="$1"
if [ -z "$output" ]; then
    echo "$0: do not run this script directly, use 'make'"
    exit 1
fi

# Get the list of package names.  This is distro-specific.
if [[ "$distro" =~ ^fedora- ]]; then
    packages="
        bash
        coreutils
        grep
        qemu
        systemd
        util-linux
    "
elif [[ "$distro" =~ ^debian- ]]; then
    packages="
        bash
        coreutils
        grep
        qemu-system-x86
        sgabios
        sysvinit-core
        util-linux
    "
else
    echo "$0: $distro not known.  You need to edit this script to add support for this distro."
    exit 1
fi

# Run the prepare step.
echo "Preparing the supermin appliance containing:" $packages
"$supermin" --prepare $packages -o tmp-supermin.d

# Add the init & run-supernested.sh scripts.
tar cf tmp-supermin.d/init.tar init run-supernested.sh

# Add the excludefiles.
cp excludefiles tmp-supermin.d/

# Run the build step.
echo "Building the full appliance ..."
echo "If you see 'Permission denied' errors here, you can probably ignore"
echo "them, but encourage your distro to stop using security-through-obscurity."
"$supermin" --build --format ext2 tmp-supermin.d -o tmp-appliance.d

# Add the kernel and initrd to the image.
# We have to do this here, AFTER the build step, because we don't
# have the kernel & initrd before this.
"$guestfish" --format=raw -a tmp-appliance.d/root -m /dev/sda <<'EOF'
  echo "Adding kernel and initrd to the disk image ..."
  upload tmp-appliance.d/kernel /kernel
  upload tmp-appliance.d/initrd /initrd

  echo "Adjusting configuration files in the image ..."
  mkdir-p /etc/modprobe.d
  write /etc/modprobe.d/kvm.conf "options kvm_intel nested=1"
EOF

# Copy out the kernel, initrd and disk image.
mv tmp-appliance.d/kernel .
mv tmp-appliance.d/initrd .
qemu-img convert -f raw tmp-appliance.d/root -O qcow2 "$output"

#rm -rf tmp-supermin.d tmp-appliance.d