#!/bin/bash

# yum.sh - Made for Puppi

# Sources common header for Puppi scripts

. $(dirname $0)/header || exit 10

# Show help

showhelp () {

    echo "This script performs the yum operations required by puppi::project::yum"

    echo "It integrates and uses variables provided by other core Puppi scripts"

    echo "It has the following options:"

    echo "-a <action> (Optional) What action to perform. Available options: deploy (default), rollback, remove"

    echo "-n <rpm_name> (Required) Name of the package to handle"

    echo "-v <rpm_version> (Optional) The version of the rpm to manage. Default: latest"

    echo "-r <install_root> (Optional) The Instll root path. Default: /"

    echo 

    echo "Examples:"

    echo "yum.sh -a deploy -n ${rpm} -r ${install_root} -v ${rpm_version}"

}

rpm_version="latest"

install_root="/"

# Check Arguments

while [ $# -gt 0 ]; do

  case "$1" in

    -a)

      case $2 in

          rollback)

          action="rollback"

          ;;

          remove)

          action="remove"

          ;;

          *)

          action="install"

          ;;

      esac 

      shift 2 ;;

    -n)

      rpm_name=$2

      shift 2 ;;

    -v)

      rpm_version=$2

      shift 2 ;;

    -r)

      install_root=$2

      shift 2 ;;

    *)

      showhelp

      exit ;;

  esac

done

do_install () {

    if [ x$rpm_version == "xlatest" ] ; then

        full_rpm_name=$rpm_name

    else

        full_rpm_name=$rpm_name-$rpm_version

    fi

    # Archives version of the rpm to update

    oldversion=$(rpm -q $rpm_name --qf  "%{VERSION}-%{RELEASE}\n")

    if [ "$?" = "0" ]; then

        mkdir -p $archivedir/$project/$oldversion

        if [ $archivedir/$project/latest ] ; then

            rm -f $archivedir/$project/latest

        fi

        ln -sf $archivedir/$project/$oldversion $archivedir/$project/latest

    fi

    if [ x$install_root != "x/" ] ; then

        yum install -y -q --installroot=$install_root $full_rpm_name

    else

        yum install -y -q $full_rpm_name

    fi

}

do_rollback () {

    yum downgrade -y -q $rpm_name-$rollbackversion

}

do_remove () {

    yum remove -y -q $rpm_name

}

# Action!

case "$action" in

    install) do_install ;;

    rollback) do_rollback ;;

    remove) do_remove ;;

esac