Lava: rootfs generation via vmdeboostrap

diff --git a/lava/rootfs/vmdeboostrap/README.md b/lava/rootfs/vmdeboostrap/README.md
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+# How to
+
+For Ubuntu trusty amd64
+$ ARCH=amd64 DISTRIBUTION=trusty ./lttng-rootfs.sh
+
+For Ubuntu trusty armhf
+$ ARCH=armhf DISTRIBUTION=trusty MIRROR=http://ports.ubuntu.com ./lttng-rootfs.sh --foreign=/usr/bin/qemu-arm-static
+
+Can be used for debian rootfs
+
+# Requirement
+
+* vmdeboostrap v1.3 - git://git.liw.fi/vmdebootstrap
+  Looks like v1.4 fail on dhcp configuration.
+* cliapp - git://git.liw.fi/cliapp
+

diff --git a/lava/rootfs/vmdeboostrap/external-packages.sha1sum b/lava/rootfs/vmdeboostrap/external-packages.sha1sum
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+++ b/lava/rootfs/vmdeboostrap/external-packages.sha1sum
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+5bfe242e609717d86e734e42e8a357947fbd70b3  linaro-overlay_1112.2_all.deb
+00970ed3c6f0722b30163f0ffa87d7216199cdda  linaro-overlay-minimal_1112.2_all.deb

diff --git a/lava/rootfs/vmdeboostrap/lava-vmdebootstrap b/lava/rootfs/vmdeboostrap/lava-vmdebootstrap
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+++ b/lava/rootfs/vmdeboostrap/lava-vmdebootstrap
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+#!/bin/sh
+
+set -e
+
+# temporary: download linaro-overlay packages, which provide
+# auto-serial-console. Plans for the future include providing
+# auto-serial-console in the Debian archive so we don't need this.
+PREFIX=https://launchpad.net/~linaro-maintainers/+archive/overlay/+files
+set -x
+while read line; do
+  if ! echo "$line" | sha1sum --check --quiet - > /dev/null 2>&1; then
+    package=$(echo "$line" | awk '{ print($2) }')
+    echo "Downloading $package ..."
+    wget --quiet $PREFIX/$package
+    echo "$line" | sha1sum --check --quiet
+  fi
+done < external-packages.sha1sum
+
+set -x
+sudo vmdebootstrap \
+  --custom-package='linaro-overlay_1112.2_all.deb' \
+  --custom-package='linaro-overlay-minimal_1112.2_all.deb' \
+  --enable-dhcp \
+  --serial-console --serial-console-command='/bin/auto-serial-console' \
+  --root-password='root' \
+  --verbose \
+  "$@"

diff --git a/lava/rootfs/vmdeboostrap/lttng-rootfs.sh b/lava/rootfs/vmdeboostrap/lttng-rootfs.sh
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+#!/bin/bash -xue
+# Copyright (C) 2016- Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+
+set -x
+
+# http://stackoverflow.com/questions/4609668/override-variable-in-bash-script-from-command-line
+: ${ARCH:="amd64"}
+: ${DISTRIBUTION:="trusty"}
+: ${MIRROR:=http://archive.ubuntu.com/ubuntu}
+: ${COMPONENTS:=universe,multiverse,main,restricted}
+
+date=`date +%Y-%m-%d-%H%M`
+tarname="rootfs_${ARCH}_${DISTRIBUTION}_${date}.tar"
+
+./lava-vmdebootstrap \
+       --arch=$ARCH \
+       --distribution=$DISTRIBUTION \
+       --tarball $tarname \
+       --mirror=$MIRROR \
+       --package=autoconf,automake,bash-completion,bison,bsdtar,build-essential,chrpath,clang,cloc,cppcheck,curl,flex,gettext,git,htop,jq,libglib2.0-dev,libpopt-dev,libtap-harness-archive-perl,libtool,libxml2-dev,python-virtualenv,python3,python3-dev,python3-sphinx,swig2.0,texinfo,tree,uuid-dev,vim,wget \
+       --debootstrapopts=components=main,universe,multiverse\
+       --hostname='linaro-server' \
+       --user=linaro/linaro \
+       --no-kernel \
+       "$@"
+
+if [ $? -ne 0 ]; then
+       echo "An error occurred"
+       exit
+else
+       gzip --best $tarname
+fi