#!/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
    . ${TARGET_ROOT}/.extra_settings
fi
# Override global DISTRO_NAME, because centos7 does not work for rinse
DISTRO_NAME=centos
DIB_RELEASE=${DIB_RELEASE:-7}
DIB_RINSE_EXTRA_ARGS=${DIB_RINSE_EXTRA_ARGS:-}
RINSE_TARBALL=$DIB_IMAGE_CACHE/rinse-${DISTRO_NAME}-${DIB_RELEASE}-${ARCH}.tar.gz
DIB_DISTRIBUTION_MIRROR=${DIB_DISTRIBUTION_MIRROR:-http://mirror.centos.org/centos/7/os/x86_64/Packages/}
http_proxy=${http_proxy:-}

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

    sudo sh -c "http_proxy=$http_proxy rinse \
        --mirror $DIB_DISTRIBUTION_MIRROR \
        --pkgs-dir $TMP_HOOKS_PATH/packages \
        --arch $ARCH \
        --distribution $DISTRO_NAME-$DIB_RELEASE \
        --directory $TARGET_ROOT \
        $DIB_RINSE_EXTRA_ARGS"

    echo "Customizing result for cloud use"
    (
        cd $TARGET_ROOT
        # effectively: febootstrap-minimize --keep-zoneinfo --keep-rpmdb --keep-services "$target"
        # locales
        sudo rm -rf usr/{{lib,share}/locale,{lib,lib64}/gconv,bin/localedef,sbin/build-locale-archive}
        # docs
        sudo rm -rf usr/share/{man,doc,info,gnome/help}
        # cracklib
        sudo rm -rf usr/share/cracklib
        # i18n
        sudo rm -rf usr/share/i18n
        # yum cache
        sudo rm -rf var/cache/yum
        sudo mkdir -p --mode=0755 var/cache/yum
        # sln
        sudo rm -rf sbin/sln
        # ldconfig
        sudo rm -rf etc/ld.so.cache var/cache/ldconfig
        sudo mkdir -p --mode=0755 var/cache/ldconfig

        # allow networking init scripts inside the container to work without extra steps
        cat << EOF | sudo tee etc/sysconfig/network > /dev/null
NETWORKING=yes
NETWORKING_IPV6=yes
NOZEROCONF=yes
EOF

        for interface in eth0 eth1; do
        cat << EOF | sudo tee etc/sysconfig/network-scripts/ifcfg-$interface > /dev/null
DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=on
EOF
        done
    )

    sudo rm -f $TARGET_ROOT/*rpm
    sudo umount $TARGET_ROOT/proc
    sudo umount $TARGET_ROOT/sys
    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

    # The filesystem package as shipped is broken. For reasons I don't fully
    # understand, rinse installs files into proper dirs, but subsequent RPM
    # operations expect these locations to be symlinks. If this next block
    # is not executed, yum installs or updates will fail with a cryptic cpio
    # failure. Moving the files in /sbin and /lib64 to /usr/sbin and /usr/lib64
    # and then making symlinks makes rpm happy.
    for broken in lib64 sbin ; do
        sudo cp -a $TARGET_ROOT/$broken/* $TARGET_ROOT/usr/$broken
        sudo rm -rf $TARGET_ROOT/$broken
        sudo ln -s usr/$broken $TARGET_ROOT/$broken
    done

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

sudo rm -f ${TARGET_ROOT}/.extra_settings