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#!/bin/sh

set -e
set -x

usage () {
    echo "${0##/*} [options] <suite> <target> [<mirror>]"
    echo "Bootstrap rootfs for Debian"
    echo
    cat <<EOF
      --arch         set the architecture to install
      --root-passwd  set the root password for bootstrapped rootfs
EOF
}

# copied from the lxc-debian template
packages=ifupdown,\
locales,\
libui-dialog-perl,\
dialog,\
isc-dhcp-client,\
netbase,\
net-tools,\
iproute,\
openssh-server

if [ $(id -u) -ne 0 ]; then
    echo "You must be root to execute this command"
    exit 2
fi

if [ $# -lt 2 ]; then
    usage $0
fi

while true; do
    case "$1" in
	 --root-passwd|--root-passwd=?*)
	     if [ "$1" = "--root-passwd" -a -n "$2" ]; then
		 ROOT_PASSWD="$2"
		 shift 2
	     elif [ "$1" != "${1#--root-passwd=}" ]; then
		 ROOT_PASSWD="${1#--root-passwd=}"
		 shift 1
	     else
		 # copied from lxc-debian template
		 ROOT_PASSWD="$(dd if=/dev/urandom bs=6 count=1 2>/dev/null|base64)"
		 ECHO_PASSWD="yes"
	     fi
	     ;;
	 --arch|--arch=?*)
	     if [ "$1" = "--arch" -a -n "$2" ]; then
		 ARCHITECTURE="$2"
		 shift 2
	     elif [ "$1" != "${1#--arch=}" ]; then
		 ARCHITECTURE="${1#--arch=}"
		 shift 1
	     else
		 ARCHITECTURE="$(dpkg-architecture -q DEB_HOST_ARCH)"
	     fi
	     ;;
	 *)
	     break
	     ;;
    esac
done
				

				
release="$1"
target="$2"

if [ -z "$1" ] || [ -z "$2" ]; then
    echo "You must specify suite and target"
    exit 1
fi

if [ -n "$3" ]; then
    MIRROR="$3"
fi

MIRROR=${MIRROR:-http://httpredir.debian.org/debian}

echo "Downloading Debian $release ..."
debootstrap --verbose --variant=minbase --arch=$ARCHITECTURE \
	    --include=$packages \
	    "$release" "$target" "$MIRROR"

echo "root:$ROOT_PASSWD" | chroot "$target" chpasswd

if [ -n "$ECHO_PASSWD" ]; then
    echo "Root password is '$ROOT_PASSWRD', please change!"
fi