#!/bin/bash
# Copyright (C) 2018 Ian Kelling

# 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.


[[ $EUID == 0 ]] || exec sudo -E "$BASH_SOURCE" "$@"


x="$(readlink -f "$BASH_SOURCE")"; source "${x%/*}/bash-trace"
x="$(readlink -f -- "$BASH_SOURCE")"; PATH="${x%/*}:$PATH" # directory of this file

usage() {
  cat <<EOF
Usage: ${0##*/} DISTRO_CODENAME
Make basefile with desktop packages preinstalled

The longest amount of time when doing a new install is installing
packages. We can make that faster by preinstalling them in a
basefile. When a basefile is created, debootstrap allows you to
specify extra packages, but in trisquel, most packages don't install
that way. Not sure exactly why. So, we can do a fai dirinstall (fancy
chroot) to install packages, then turn that into a new basefile.

The script depnds on being in a directory with other scripts from it's repo.

Warning: uses paths specific to author's machine.

-h|--help  Print help and exit.

Note: Uses GNU getopt options parsing style
EOF
  exit $1
}

read distver <<<"$@"

if [[ $# != 1 ]]; then
  echo "$0: error: expected one argument"
  usage 1
fi


case $distver in
  flidas)
    distro=trisquel
    classes="UBUNTU FLIDAS64 VOL_FLIDAS FLIDAS DESKTOP"
    ;;
  stretch)
    classes="DEBIAN STRETCH64 VOL_STRETCH STRETCH DESKTOP"
;;
  *)
    echo "$0: error: unknown DISTRO_CODENAME"
    usage 1
    ;;
esac

distro=trisquel

# background: i tried using a tmpfs for this. it had minimal effect, like 17 mins vs 18 mins
t=/tmp/dirinstall


err-cleanup() {
  sed -i 's/^#LOGUSER=/LOGUSER=/' /etc/fai/fai.conf
  for d in proc var/lib/dpkg var/cache; do
  umount -R $t/$d ||:
  done
  rm -rf $t
}


myfai-chboot default
sed -i 's/^LOGUSER=/#LOGUSER=/' /etc/fai/fai.conf
# config umount required after a failed run, proc umount always required
umount /var/lib/fai/config ||: ; umount -R $t/proc ||:

fai-redep faiserver $distro
echo "echo $classes" > /srv/fai/config/class/51-multi-boot

rm -rf $t; mkdir -p $t

LANG= fai -N -u hostname_does_not_matter dirinstall $t

# Turn a dirinstall into a basefile. taken from mk-basefile
chroot $t apt-get clean
rm -f $t/etc/hostname $t/etc/resolv.conf \
   $t/var/lib/apt/lists/*_* $t/usr/bin/qemu-*-static \
   $t/etc/udev/rules.d/70-persistent-net.rules
echo | dd of=$t/etc/machine-id
tar --one-file-system -C $t -cf - . | gzip > /a/bin/fai-basefiles/basefiles/${distver^^}64BIG.tar.gz


cleanup
exit 0