#! /bin/sh

# Erik Jacobson
#
# This script will create a temporary yum config file pointed at this
# directory in case you prefer to use command line tools to install as
# opposed to print and system-cdinstall-helper.
#
# Since Rhel6.0, system-cdinstall-helper is no longer available.

# Most customers should use this script.
#

# First, we need to figure out the path to the CD.

MY_NAME=${0##*/}
BASE=/etc/yum.conf
cfg=${CFG:-/tmp/yum-hpe.conf}
err=0
relfile=/etc/redhat-release
discinfo=.discinfo
MediaPath=
MediaName=
[ -r $cfg ]		&& echo NOTICE: ${cfg} already exist. New configuration will be appended.
[ -f $cfg -a ! -w $cfg ] && echo WARNING: ${cfg} write permissions. Exiting. && exit 1
[ "${0:0:1}" = "/"  ] 	&& MediaPath=$(dirname $0)
[ "${0:0:2}" = ".." ] 	&& MediaPath=
[ "${0:0:2}" = "./" ] 	&& MediaPath=$(pwd)

[ -z "$MediaPath" ] \
	&& echo "ERROR: Please run ${MY_NAME} like this:" \
	&& echo "       /path/to/media/${MY_NAME}" \
	&& err=$(( $err + 1 )) \
	|| echo "Using media path: $MediaPath"
! [ -r $relfile ] \
	&& echo "ERROR: no $relfile file.  Is this a RHEL system?" \
	&& err=$(( $err + 1 )) \
	|| echo Redhat Release: $(cat $relfile )
discinfo="${MediaPath}/$discinfo"
! [ -r $discinfo ] \
	&& echo "ERROR: no $discinfo file.  Please check your media." \
	&& err=$(( $err + 1 )) \
	|| MediaName=$(cat $discinfo | head -2 | tail -1 | tr '/ ' '--' )
[ -z "$MediaName" ] \
	&& echo "ERROR: Cannot determine media name using $discinfo." \
	&& err=$(( $err + 1 )) \
	|| echo "Using media name: ${MediaName}"

[ $err -ne 0 ] \
	&& echo "NOTICE: $err error(s) found. Exiting." \
	&& exit 1


# Create temporary yum configuration file.
if [ ! -s $cfg -o ! -f $cfg ] ; then
	[ -r ${BASE} ] \
		&& cp ${BASE} ${cfg} \
		|| echo WARNING: $BASE read permission. Not using it.
fi
# Find  available yum groups
xml=${MediaPath}/RPMS/comps.xml
groups=( "Cannot be determined. Please use: yum grouplist." )
if [ ! -r ${xml} ] ; then
	echo "WARNING: ${xml} not found or no read permissions."
	echo "         Cannot display available groups for installation."
else
	IFS='^' groups=(`grep '<name>' RPMS/comps.xml \
			| sed -re 's/[[:space:]]*<[/]*name>//g' \
			| sort -u \
			| sed -e 's/^/"/' -e 's/$/"^/' \
			| tr -d '\n'` )
	[ ${#groups[@]} -eq 0 ] \
		&& groups=( "Cannot be determined. Please use: yum grouplist." )
fi

# Create repo if need be.
grep -qE "\[${MediaName}\]" $cfg \
	&& echo WARNING: ${MediaName} entry already exist. No entry added to $cfg. \
	|| cat <<-ENDREPO >> $cfg

		[${MediaName}]
		# Available Groups:
		$( for (( i=0; i < ${#groups[@]}; i++)) ; do printf "#     %s\n" "${groups[i]}"; done)
		#
		name=${MediaName}
		baseurl=file://$MediaPath/RPMS
		enabled=1
		gpgkey=file://$MediaPath/RPM-GPG-KEY-sgi
		       file://$MediaPath/RPM-GPG-KEY-hpe
		gpgcheck=1
		ENDREPO

# Talk about how to use the config file a bit.
cat <<DONE 1>&2
===============================================================================
How to use $cfg
===============================================================================
A temporary yum config file has is available as ${cfg}.

You can use this config file with the system yum command to install from this 
media. 

Note you can add additional media(s) to ${cfg}, ie.:
   # cd /path/to/another_media
   # ./${MY_NAME}

Here are some example yum commands you may look in to.

Available Groups:
$( for (( i=0; i < ${#groups[@]}; i++)) ; do printf "     %s\n" "${groups[i]}"; done )

List all groups available for installation:
  # yum -c ${cfg} grouplist

Install a group, in this example : ${groups[0]}
  # yum -c ${cfg} groupinstall ${groups[0]}

Note: Be sure to install all the groups you need; the above is just an
example.  You can use the 'grouplist' command to find the available
group choices, and select from that list.
DONE

exit 0