bt-prepqemu

#!/bin/bash -e
# Author: Yannick Heneault yheneaul@gmail.com
# 
# This file is part of buildtasks.
# 
# Buildtasks is free software; you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published by the
# Free Software Foundation; either version 3 of the License, or (at your
# option) any later version.


fatal() { echo "FATAL [$(basename $0)]: $@" 1>&2; exit 1; }
warning() { echo "WARNING [$(basename $0)]: $@"; }
info() { echo "INFO [$(basename $0)]: $@"; }

usage() {
cat<<EOF
Syntax: $(basename $0) appname-version
Converts appliance appname-version to qcow2 for qemu

Arguments::

    appname-version     - e.g., core-14.2-jessie-amd64

Environment::

    BT_DEBUG            - turn on debugging
EOF
exit 1
}

while [ "$1" != "" ]; do
    case $1 in
        --help|-h )  usage;;
        *)           if [ -n "$appver" ]; then usage; else appver=$1; fi ;;
    esac
    shift
done

[ -n "$appver" ] || usage

[ -n "$BT_DEBUG" ] && set -x

export BT=$(dirname $(readlink -f $0))
export BT_CONFIG=$BT/config
. $BT_CONFIG/common.cfg

parsed_appname_version=$($BT/bin/parse-appname-version $appver)
read appname appversion codename arch <<< "$parsed_appname_version"
export BT_VERSION=${appversion}-${codename}-${arch}
export RELEASE="debian/$codename"

os_arch=$(dpkg --print-architecture)
[ "$arch" == "$os_arch" ] || fatal "os_arch mismatch: $arch != $os_arch"

$BT/bin/img-download $BT_IMGS $BT_VERSION $appname
$BT/bin/img-verify $BT_IMGS $BT_VERSION $appname

O=$BT_QEMU
mkdir -p $O
cd $O

imgfile=turnkey-${appname}-${BT_VERSION}.img.xz
tmpimgfile=${imgfile%.xz}
qcowfile=${imgfile%.img.xz}.qcow2

info "Decompressing image..."
xz -d -c $BT_IMGS/$imgfile > $tmpimgfile
info "Resizing image..."
qemu-img resize -f raw $tmpimgfile 30G
parted -s $tmpimgfile -- resizepart 2 100%
kpartx -asv $tmpimgfile
e2fsck -f /dev/mapper/loop0p2
resize2fs /dev/mapper/loop0p2
mkdir -p sdroot
mount /dev/mapper/loop0p2 sdroot
mkdir -p sdroot/boot/firmware
mount /dev/mapper/loop0p1 sdroot/boot/firmware

[[ "$appversion" == *"rc"* ]] && $BT/bin/upgrade-pkgs sdroot

$BT/bin/purge-pkgs sdroot
tklpatch-apply sdroot $BT/patches/qemu
$BT/bin/rootfs-cleanup sdroot

$BT/bin/aptconf-tag sdroot qemu

cp sdroot/boot/vmlinuz-* vmlinuz-$qcowfile 
cp sdroot/boot/initrd.img-* initrd.img-$qcowfile 

umount sdroot/boot/firmware
umount sdroot
rmdir sdroot 
kpartx -dsv $tmpimgfile
info "Converting image..."
qemu-img convert -f raw -O qcow2 $tmpimgfile $qcowfile
rm $tmpimgfile