#!/bin/bash
#
# Copyright 2014 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
    set -x
fi
set -eu
set -o pipefail

if [ -f ${TARGET_ROOT}/.extra_settings ] ; then
    . ${TARGET_ROOT}/.extra_settings
fi

[ -n "$DISTRO_NAME" ]
[ -n "$DIB_RELEASE" ]

DIB_DEBOOTSTRAP_EXTRA_ARGS=${DIB_DEBOOTSTRAP_EXTRA_ARGS:-}
DEBOOTSTRAP_TARBALL=$DIB_IMAGE_CACHE/debootstrap-${DISTRO_NAME}-${DIB_RELEASE}-${ARCH}.tar.gz
DIB_DISTRIBUTION_MIRROR=${DIB_DISTRIBUTION_MIRROR:-http://archive.ubuntu.com/ubuntu}
http_proxy=${http_proxy:-}

if [ -n "$DIB_OFFLINE" -o -n "${DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE:-}" ] && [ -f $DEBOOTSTRAP_TARBALL ] ; then
    echo $DEBOOTSTRAP_TARBALL found in cache. Using.
    sudo tar -C $TARGET_ROOT --numeric-owner -xzf $DEBOOTSTRAP_TARBALL
else

    KEYRING_OPT=
    if [ -n "${DIB_DEBIAN_KEYRING:-}" ] ; then
        KEYRING_OPT="--keyring=${DIB_DEBIAN_KEYRING}"
    fi

    # Have to --include=python because of dib-run-parts
    # Have to --include=sudo for pre-install.d use of sudoers files
    sudo sh -c "http_proxy=$http_proxy debootstrap --verbose \
        --variant=minbase \
        --include=python,sudo \
        --components=main,restricted,universe \
        --arch=${ARCH} \
        $KEYRING_OPT \
        $DIB_DEBOOTSTRAP_EXTRA_ARGS \
        $DIB_RELEASE \
        $TARGET_ROOT \
        $DIB_DISTRIBUTION_MIRROR \
        ${DIB_DEBIAN_DEBOOTSTRAP_SCRIPT:-}"

    echo "Customizing result for cloud use"

    sudo install -d -m 0755 -o root -g root ${TARGET_ROOT}/etc/sudoers.d

    cat << EOF | sudo tee ${TARGET_ROOT}/etc/fstab > /dev/null
proc /proc proc nodev,noexec,nosuid 0 0
LABEL=${DIB_ROOT_LABEL} / ext4 errors=remount-ro 0 1
EOF
    sudo sh -c "echo 'blacklist pcspkr' > ${TARGET_ROOT}/etc/modprobe.d/blacklist.conf"

    # It would be eversogreat if we didn't need to do crap like this
    sudo sh -c "echo 'ubuntu' > ${TARGET_ROOT}/etc/hostname"

    # cloud images expect eth0 and eth1 to use dhcp.
    sudo mkdir -p ${TARGET_ROOT}/etc/network/interfaces.d
    for interface in eth0 eth1; do
        cat << EOF | sudo tee ${TARGET_ROOT}/etc/network/interfaces.d/$interface
auto $interface
iface $interface inet dhcp
EOF
    done

    echo Caching debootstrap result in $DEBOOTSTRAP_TARBALL
    sudo tar --numeric-owner -C $TARGET_ROOT -zcf $DEBOOTSTRAP_TARBALL --exclude='./tmp/*' .
fi

sudo rm -f ${TARGET_ROOT}/.extra_settings