#!/bin/sh
#
#  autorpm to yum
#    This script is to convert a Fermi Linux machine that
#   is using autorpm to make it use yum instead.
#
#  Written by: Troy Dawson <dawson@fnal.gov>
#    First write: March 19, 2003
#   Changed: April 16, 2003
#	Made this a 'non-gentle' script, that just does the change
#	This version isn't to be forced on everyone, but just for
#	those that want an easy way to change over.
#
#  Good time for at
#    at -f autorpm.to.yum 0105 tomorrow
#
##################
# Variables
##################
VERSION="0.9"
SERVER="linux1.fnal.gov"
RPMPATH="/linux/71rolling/i386/RedHat/RPMS"
TEMPDIR="/etc/a2y"
MAILFILE="/tmp/a2y.mail"
AUTOINSTALL="no"
AUTOVERIFY="no"
AUTOCRON="no"
YUMINSTALL="no"
YUMCRON="no"
DEBUG="yes"
MAILLIST="root"
#MAILLIST="root,me@mydomain.com,you@yourdomain.org"
TODAY="$(date +%D)"


###############
# Download and install the latest rpm
##############
install_rpm(){
	if [ $DEBUG = "yes" ] ; then
		echo " "
		echo "****************"
		echo "UPDATING RPM"
		echo "****************"
		echo " "
		echo "Saving old rpm database"
	fi
	cp -rp /var/lib/rpm /var/lib/rpm.$TODAY
	
	if [ $DEBUG = "yes" ] ; then
		echo " "
		echo "Downloading latest packages"
	fi
	ncftpget ftp://${SERVER}/${RPMPATH}/rpm-*
	ncftpget ftp://${SERVER}/${RPMPATH}/popt-*
	if [ $DEBUG = "yes" ] ; then
		echo " "
		echo "Updating rpm to the required level"
		echo " "
		if ! [ -d /var/lib/original.rpm ] ; then
			/bin/cp -r /var/lib/rpm /var/lib/original.rpm
		fi
		rpm -v --freshen --nodeps --force rpm-*.rpm popt-*.rpm
		echo " "
		echo "  RPM has been updated to 4.0.4"
		echo " "
	else
		rpm --freshen --nodeps --force rpm-*.rpm popt-*.rpm
	fi
	if [ $DEBUG = "yes" ] ; then
		echo " "
		echo "Rebuilding rpm database"
		echo "  checking database for major errors"
	fi
	rpm -qa > /dev/null
	if [ $? -eq 0 ] ; then
		if [ $DEBUG = "yes" ] ; then
			echo " "
			echo "  Database appears to be intact, rebuilding"
			echo " "
		fi	
		rpm -rebuilddb
	else
		if [ $DEBUG = "yes" ] ; then
			echo " "
			echo "  Database does not appear to be intact, not rebuilding"
			echo " "
		fi	
	fi
	echo " " >> $MAILFILE
	echo "  RPM has been updated to 4.0.4" >> $MAILFILE
	echo " " >> $MAILFILE
}

###############
# Download and install the latest yum
##############
install_yum(){
	if [ $DEBUG = "yes" ] ; then
		echo " "
		echo "****************"
		echo "INSTALLING YUM"
		echo "****************"
		echo " "
		echo "Downloading latest packages"
	fi
	ncftpget ftp://${SERVER}/${RPMPATH}/yum*
	if [ $DEBUG = "yes" ] ; then
		echo " "
		echo "Installing and/or upgrading Yum packages"
		echo " "
		rpm -Uv yum-1*.rpm
		rpm -Uv yum-conf*.rpm
		rpm -Uv yum-header*.rpm
		echo " "
		echo "Yum has been installed and configured."
		echo " "
	else
		rpm -U yum-1*.rpm
		rpm -U yum-conf*.rpm
		rpm -U yum-header*.rpm
	fi
	echo " " >> $MAILFILE
	echo "  Yum has been installed and configured." >> $MAILFILE
	echo " " >> $MAILFILE
}

###############
# Remove autorpm
##############
remove_autorpm(){
	if [ $DEBUG = "yes" ] ; then
		echo " "
		echo "****************"
		echo "REMOVING AUTORPM"
		echo "****************"
		echo " "
		rpm -ev autorpm autorpm-config
		echo " "
	else
		rpm -e autorpm autorpm-config
	fi
	echo " " >> $MAILFILE
	echo "  autorpm and autorpm-config have been uninstalled." >> $MAILFILE
	echo "    If you need to re-install them do the command" >> $MAILFILE
	echo "      yum install autorpm autorpm-config" >> $MAILFILE
	echo "    Reinstalling autorpm is not recommended." >> $MAILFILE
	echo " " >> $MAILFILE
}

###############
# cleanup autorpm
##############
cleanup_autorpm(){
	if [ $DEBUG = "yes" ] ; then
		echo " "
		echo "****************"
		echo "CLEANUP AUTORPM"
		echo "****************"
		echo " "
	fi
	rm -f /var/spool/autorpm/*.rpm
	rm -f /etc/cron.daily/*autorpm*
	echo " " >> $MAILFILE
	echo "  All of the leftover rpms have been removed from the " >> $MAILFILE
	echo "  autorpm cache area" >> $MAILFILE
	echo " " >> $MAILFILE
	if [ $DEBUG = "yes" ] ; then
		echo " "
		echo "  All of the leftover rpms have been removed from the "
		echo "  autorpm cache area"
		echo " "
	fi
}

###############
# Main Program
###############
mkdir $TEMPDIR
cd $TEMPDIR
echo "Autorpm to Yum conversion script" > $MAILFILE
echo "Version ${VERSION} ran on" >> $MAILFILE
date >> $MAILFILE
echo " " >> $MAILFILE
if [ $DEBUG = "yes" ] ; then
	echo "Autorpm to Yum conversion script"
	echo "Version ${VERSION} ran on"
	date
	echo " "
fi
remove_autorpm
cleanup_autorpm
install_rpm
install_yum

########
# Cleanup and Mail
########
if [ $DEBUG = "yes" ] ; then
	echo "  /bin/mail -s \"AUTORPMtoYUM:$HOSTNAME:$TODAY\" $MAILLIST "
fi
/bin/mail -s "AUTORPMtoYUM:$HOSTNAME:$TODAY" $MAILLIST < $MAILFILE
rm -f $TEMPDIR/*.rpm