Expanding ks.cfg tweaks

For the latest (and currently whole) ks.cfg I use, check this link. I have extended the logic there, and got the following out of it. Showing only the %pre section:

%pre
# By Ez-Aton http://www.tournament.org.il/run
for i in `cat /proc/cmdline`; do
echo $i >> /tmp/vars.tmp
done
grep “=” /tmp/vars.tmp > /tmp/vars
# Parse command line. Using only vars with type var=value (doesn’t matter
# what the actual value is)
KS=/tmp/ks.cfg
update=””
name=””
pkg=””
. /tmp/vars
# Shall we update the system during the %post section?
if [ ! -z “$update” ]; then
echo “yum update -y” >> $KS
fi
# Shall we reboot the system after the installation?
if [ ! -z “$reboot” ]; then
echo “reboot” > $KS.tmp
cat $KS >> $KS.tmp
cat $KS.tmp > $KS
fi
# What is the machine’s hostname?
if [ ! -z “$name” ]; then
value=”dhcp –hostname $name”
cat $KS | sed s/dhcp/”$value”/ > $KS.tmp
cat $KS.tmp > $KS
fi
# Shall we add another package to the installation preset?
if [ ! -z “$pkg” ]; then
pkg_line=`grep -n ^%packages $KS | cut -f 1 -d :`
max_line=`wc -l $KS | awk ‘{print $1}’`
head -n $pkg_line $KS > $KS.tmp
for i in `echo $pkg | sed s/,/ /g`; do
echo $i >> $KS.tmp
done
let tail_line=$max_line-$pkg_line
tail -n $tail_line $KS >> $KS.tmp
cat $KS.tmp > $KS
fi
# Is it a virtual machine running on VMWare? If so, we’ll install vmware-tools
if [ ! -z “$vmware” ]; then
# We need vmhttp value for server. It can be the name and path
# of the web server
if [ -z “$vmhttp” ]; then
# my defaults
vmhttp=”centos4-01″
fi
# The name of the rpm is always vmware.rpm
echo “wget http://$vmhttp/vmware.rpm” >> $KS
echo “rpm -i vmware.rpm” >> $KS
fi