#!/bin/bash -l
# Copyright (C) 2016 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.



cleanup() { :; }
set -eE -o pipefail
trap 'cleanup; echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
script_dir=$(dirname $(readlink -f "$BASH_SOURCE"))

e() { echo "$*"; "$@"; }


usage() {
    cat <<EOF
# Usage: ${0##*/} [OPTIONS]
Setup fai or arch pxe (depending on $0 name)
then start a virtual machine to test the config

Note, sometimes shutting down the existing demohost vm
fails. Just run again if that happens.

-r         Do not boot after install is complete
-n         Create new qcow2(s) for vm. Good for testing partitioning
           script, to ensure a blank disk.
-h|--help  Print help and exit.

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

new_disk=false
temp=$(getopt -l help hnr "$@") || usage 1
eval set -- "$temp"
while true; do
    case $1 in
        -n) new_disk=true; shift ;;
        -r) reboot_arg=--noreboot; shift ;;
        -h|--help) usage ;;
        --) shift; break ;;
        *) echo "$0: Internal error!" ; exit 1 ;;
    esac
done


# change this to test different disk counts. 1 and > 1 should be the only
# important things to test.
disk_count=1


if [[ $script_dir == /a/bin/* ]]; then
    # Copy our script elsewhere so we can develop it
    # and save it at the same time it's running
    rm -rf /tmp/faifreeze
    mkdir -p /a/tmp
    cp -ar /a/bin/fai /tmp/faifreeze
    exec /tmp/faifreeze/${BASH_SOURCE##*/} "$@"
fi

cd $script_dir

is_arch_revm() {
    [[ ${0##*/} == arch-revm ]]
}

cleanup() {
    ./pxe-server
    ./faiserver-disable
}
if is_arch_revm; then
    ./pxe-server demohost arch
    sleep 2
    # via osinfo-query os. guessing arch is closest to latest fedora.
    variant=fedora22
else
    ./pxe-server demohost fai
    sleep 2
    # I don't think these variants actually make a diff for us, but I
    # use the appropriate one when trying a new distro just in case.
    variant=ubuntu14.04
    #variant=ubuntu16.04
    #variant=debian8
fi

name=demohost

e s virshrm $name ||:


disk_arg=()
for ((i=1; i <= disk_count; i++)); do
    f=/var/lib/libvirt/images/${name}$i
    disk_arg+=("--disk path=$f")
    if $new_disk || [[ ! -e $f ]]; then
        s rm -f $f
        e s qemu-img create -o preallocation=metadata -f qcow2 $f 20G
    fi
done

if [[ $SSH_CLIENT ]]; then
    console_arg=--noautoconsole
fi

# --cpu host: this causes mkfs.btrfs to fail with a stack trace which began
# something like:
# init_module+0x108/0x1000 [raid6_pq]
#
# uniq is to stop gtk-warning spam
e s virt-install --os-variant $variant  -n $name --pxe -r 2048 --vcpus 1 \
  ${disk_arg[*]} -w bridge=br0,mac=52:54:00:9c:ef:ad $reboot_arg \
  --graphics spice,listen=0.0.0.0 $console_arg |& grep -v '^ *$' | uniq &

if [[ $SSH_CLIENT ]]; then
    fg
fi

sleep 30
while ! timeout -s 9 10 ssh -oBatchMode=yes root@$name /bin/true; do
    e sleep 5
done
cleanup() { :; }
e pxe-server
if is_arch_revm; then
    ./arch-init-remote $name
fi