#! /bin/bash
# Focus:
#	- configure package repository
#	- configure proxy settings
# Goal:
#	- apt/yast possible



# read additional information from the environment or from the
# identityfile, values given in identityfile have preference!
# this file must contain:
#   OS_TYPE - which OS to install (Debian, Ubuntu, SuSE?)
#   OS_VERS - which version to install? (etch, lenny, sid, hardy, 10SP2)
#   OS_ARCH - x86_32 or x86_64?
if [ -r ${IDENTITYFILE} ] ; then
	source ${IDENTITYFILE}
else
	echo "Identity file not readable. Exiting" 
	exit
fi


# helper
toLower() {
  echo $1 | tr "[:upper:]" "[:lower:]" 
} 



# if skiptask is not defined, then the original prepareapt task will be run 
# at the end and any changes to /etc/apt/... will be overwritten by the files
# from the nfsroot!!
skiptask prepareapt

# rewriting the original prepareapt hook

# ftp and http needs resolv.conf in chroot environment, /etc/hosts is useful
# think about using fcopy for these two files
[ -f /etc/resolv.conf ] && cp /etc/resolv.conf $FAI_ROOT/etc
[ -f /etc/hosts ] && cp /etc/hosts $FAI_ROOT/etc

# set hostname in $FAI_ROOT
if [ -f /var/run/fai/FAI_INSTALLATION_IN_PROGRESS ]; then
	# check whether my hostname is faiclient-...
	# if it is, then it's just a placeholder and we have to fetch the 
	# real name from the identity file
	NAMEOLD=$(hostname)
	NAMESHORT=$(echo ${NAMEOLD}|cut -d"-" -f1)
	if [[ ${NAMESHORT} = "host" || ${NAMESHORT} = "faiclient" ]] ; then
		# update the kernel's view on this
		echo ${HOSTNAME} > /proc/sys/kernel/hostname
		echo ${DOMAIN} > /proc/sys/kernel/domainname
	fi
	# $HOSTNAME / $DOMAIN now contain the correct values

	# Step a - set the hostname
	if [[ ${OS_TYPE} == "Debian" || ${OS_TYPE} ==  "Ubuntu" ]] ; then
		echo ${HOSTNAME} > ${target}/etc/hostname
	elif [[ ${OS_TYPE} == "SLES" ]] ; then
		echo ${HOSTNAME}.${DOMAIN} > ${target}/etc/HOSTNAME
	fi

	# Step b - update /etc/hosts
	HOSTSTEMPLATE="${FAI}/files/templates/hosts.tmpl"
	HOSTSFILE="${target}/etc/hosts"

	# replace PLACEHOLDER with our own ip/name. Keep the nice header and the ipv4/ipv6 localhost footer
	sed -e "s/^PLACEHOLDER/${IPADDR}\t\t${HOSTNAME}.${DOMAIN}\t${HOSTNAME}/" ${HOSTSTEMPLATE} > ${HOSTSFILE}

	# Step c - rewrite /etc/resolv.conf
	# damned either way
	# a) configure dhcpd / option domain-name to provide the searchlist - which breaks MacOS et al, 
	#    since they only expect 1 value - the domainname
	# b) configure dhcpd to provide the search list via option 119 - which may
	#    or may not be picked up correctly by dhcp-client
	# let's go for the safeguard. If /etc/resolv.conf contains "search", then use this
	# if not, then check for a variable SEARCHLIST and replace a possible "domain" setting
	if [ -z $(grep "^search" /etc/resolv.conf) ] ; then
		# a line containing a searchlist has been found
		# use this file and copy it
		cp /etc/resolv.conf ${target}/etc/resolv.conf
	else
		# no such line has been found, check if a searchlist
		# was requested and rewrite the file accordingly
		if [ x${SEARCHLIST} != x ] ; then
			echo "search ${SEARCHLIST}"		>  ${target}/etc/resolv.conf
			grep "^nameserver" /etc/resolv.conf	>> ${target}/etc/resolv.conf
		else
			# no searchlist specified, just copy it
			cp /etc/resolv.conf ${target}/etc/resolv.conf
		fi
	fi
fi


## during normal installation, we need a valid sources.list
if [ $do_init_tasks -eq 1 ] ; then
	if [[ ${OS_TYPE} == "Debian" || ${OS_TYPE} ==  "Ubuntu" ]] ; then

		if [[ $FAI_ALLOW_UNSIGNED = 1 ]]; then
			echo "APT::Get::AllowUnauthenticated \"true\";"		>  $FAI_ROOT/etc/apt/apt.conf.d/10fai
			echo "Aptitude::CmdLine::Ignore-Trust-Violations yes;"	>> $FAI_ROOT/etc/apt/apt.conf.d/10fai
		fi

		# sources.list contains the placeholder OSVERS, replace it while copying.
		sed -e "s/OSVERS/${OS_VERS}/" $FAI/files/etc/apt/sources.list_${OS_TYPE} > $target/etc/apt/sources.list

		# a local package mirror may be available
		if [[ ${LOCALMIRROR} != "" ]] ; then
			tmpfile=$(mktemp -p $target/tmp/)

			# Debian Sources:
			# http://ftp.[de.]debian.org/debian OSVERS			-> $MIRROR/debian 
			# http://security.debian.org/debian-security OSVERS/updates	-> $MIRROR/debian-security

			# Ubuntu Sources:
			# http://[de.]archive.ubuntu.com/ubuntu OSVERS			-> $MIRROR/ubuntu
			# http://security.ubuntu.com/ubuntu OSVERS-security		-> %MIRROR/ubuntu-security

			# last sed removes any double dashes, that are not part of http://
			cat ${target}/etc/apt/sources.list | \
			  sed -e "s#http://ftp.*debian\.org/debian#${LOCALMIRROR}debian/#g"				| \
			  sed -e "s#http://security\.debian\.org/debian-security#${LOCALMIRROR}/debian-security/#g"	| \
			  sed -e "s#http://.*archive\.ubuntu\.com/ubuntu#${LOCALMIRROR}/ubuntu/#g"			| \
			  sed -e "s#http://security\.ubuntu\.com/ubuntu#${LOCALMIRROR}/ubuntu-security/#g"		| \
			  sed -e "s#\([a-zA-Z0-9]\)//#\1/#g"							> ${tmpfile}
			cp ${tmpfile} /tmp/fai/sources.list
			mv ${tmpfile} ${target}/etc/apt/sources.list
		fi

		if [[ -n ${LOCALREPO} ]] ; then
			echo "Configuring local repository: ${LOCALREPO}"

			REPOSTRING=$(toLower "${OS_TYPE} ${OS_VERS} main")
			echo "deb ${LOCALREPO}/$REPOSTRING" >> $target/etc/apt/sources.list.d/local.list
		fi

	elif [[ ${OS_TYPE} == SLES ]] ; then
		# additional work for SLES

		if [[ ${LOCALREPO} != "" ]] ; then
			echo "Configuring local repository: ${LOCALREPO}"
			#TODO: call zypper
			echo "WARN: Not implemented yet!"
		fi

		# supply additional mountpoints (SLES11)
		echo "" >> ${target}/etc/fstab
		echo "proc		/proc			proc	defaults	0	0" >> ${target}/etc/fstab
		echo "sysfs		/sys			sysfs	noauto		0	0" >> ${target}/etc/fstab
		echo "debugfs		/sys/kernel/debug	debugfs	noauto		0	0" >> ${target}/etc/fstab
		echo "devpts		/dev/pts		devpts	mode=0620,gid=5	0	0" >> ${target}/etc/fstab
		echo "" >> ${target}/etc/fstab

		# needed for mkinitrd and package suspend (at least in SLES11)
		mount --bind /dev ${target}/dev
		mount -t tmpfs none ${target}/dev/shm
	
		# else kernel install throws a warning
		modprobe dm-mod
	fi

fi