#!/bin/bash

# Copyright 2012 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.

set -eu
set -o pipefail

EXTRA_ARGS=
ACTION=install

if [ "$1" = "-u" ] ; then
    yum -y update
    exit 0
elif [ "$1" = "-d" ] ; then
    EXTRA_ARGS="--downloadonly"
    shift
elif [ "$1" = "-e" ]; then
    ACTION=erase
    shift
fi

# Packages that aren't available in the distro but requested for installation
# can be ignored by adding them to the exclude list
BLACKLIST=$(cat /tmp/yum-blacklist 2>/dev/null || echo "")
WHITELIST=
for i in "$@"
do
    if [[ ! ${BLACKLIST[*]} =~ $i ]]; then
        WHITELIST="$WHITELIST $i"
    else
        echo "The package $i is not available and will not be installed"
    fi
done
if [ -n "$WHITELIST" ]; then
    if [ -f /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release ]; then
        rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
    fi
    yum -y $ACTION $EXTRA_ARGS $(map-packages $WHITELIST)
    for pkg in "$@"; do
        if [ "$pkg" = "python-pip" ] ; then
            alternatives --install /usr/bin/pip pip /usr/bin/pip-python 10
        fi
    done
fi