#! /bin/bash

# I found it necessary to modify the default behaviour, because
# fai has some quirks I don't like.
#   - if base.tgz exists then always use it instead of bootstrapping
#   - find a valid base image via a class
#     this class is used nowhere else and doesn't have
#     other uses.
#  (- always state a Debian base archive is being extracted)
#   - fai barfs on debootstraps exit code 141
#     (this still needs a proper analysis)

# read additional information from the environment or from the
# identityfile, values given in identityfile have preference!
# this file must contain:
#   FAI_OSTYPE - which OS to install (Debian, Ubuntu, SuSE?)
#   FAI_OSVERS - which version to install? (etch, lenny, sid, hardy, 10SP2)
#   FAI_OSARCH - x86_32 or x86_64?
if [ -r ${IDENTITYFILE} ] ; then
	source ${IDENTITYFILE}
fi

## Preparation - lenny's grub has a small cosmetic flaw
##   it always tries to read the device map from the root
##   device - but an nfsroot doesn't have / need a device map
# PATCHLOCATION is defined in class/DEFAULT
# may have been overwritten by a later definition
cat $PATCHLOCATION/grub-install.patch | patch -p 1 


## Step 1 - check for debootstrap options or create new ones
if [ -z ${FAI_DEBOOTSTRAP} ] ; then
	case ${OS_TYPE} in
		Debian)
			FAI_DEBOOTSTRAP="${OS_VERS} http://ftp.de.debian.org/debian/"
			;;
		Ubuntu)
			FAI_DEBOOTSTRAP="${OS_VERS} http://de.archive.ubuntu.com/ubuntu/"
			;;
	esac			
fi
if [ -z ${FAI_DEBOOTSTRAP_OPTS} ] ; then
	# make sure debootstrap contains correct architecture
	case ${OS_ARCH} in
		X86_32)
			ARCH="--arch=i386"
			;;
		X86_64)
			ARCH="--arch=amd64"
			;;
	esac

	# make sure ubuntu is installed with aptitude
	# the intrepid-script on Debian/Lenny doesn't include it
	if [[ ${OS_TYPE} = "Ubuntu" ]] ; then
		INCLUDE="--include=aptitude"
	fi

	# don't install dhcp-client or dhcp3-client
	# it's only installed when requested
	EXCLUDE="--exclude=dhcp3-client,dhcp-client"

	FAI_DEBOOTSTRAP_OPTS="$ARCH $INCLUDE $EXCLUDE $FAI_DEBOOTSTRAP_OPTS"
fi

# this code is copied from task_extrbase() found in
# <NFSROOT>/usr/lib/fai/subroutines-linux
# changes:
#   - don't lie about installing debian
#   - if IGNOREBASETGZ is set, the base.tgz is ignored
#   - regard debootstraps exit code 141 as valid

echo "Installing ${OS_TYPE} base archive."

fs=$FAI_ROOT/etc/fstab
if [[ $SWREPO != "" ]] ; then
	wget -q -P /tmp/ "$SWREPO/basefiles/BASE_${OS_TYPE}-${OS_VERS}-${OS_ARCH}.tar.gz"
	basefile=/tmp/BASE_${OS_TYPE}-${OS_VERS}-${OS_ARCH}.tar.gz
else
	basefile=$FAI/basefiles/BASE_${OS_TYPE}-${OS_VERS}-${OS_ARCH}.tar.gz
fi

# find & extract the base file
if [ -r ${basefile} ] ; then
	echo "Unpacking ${basefile}"
	tar xzf ${basefile} -C ${target}
else
	# or use base.tgz (if allowed) / call debootstrap 
	echo "Could not find BASE_${OS_TYPE}-${OS_VERS}-${OS_ARCH}.tar.gz in $FAI/basefiles/"
	[ $do_init_tasks -eq 0 ] && basefile=$NFSROOT/live/filesystem.dir/var/tmp/base.tgz
	if [ -f $basefile ] && [[ $IGNOREBASETGZ = 0 ]] ; then
		# extract the tar file which was the result of debootstrap
		echo "Extracting $basefile"
		gzip -dc $basefile | tar -C $FAI_ROOT -xpf -
	else
		echo "Calling debootstrap."
		[ -z "$FAI_DEBOOTSTRAP" ] && die "$FAI_DEBOOTSTRAP undefined. Aborting"
		call_debootstrap $FAI_DEBOOTSTRAP $FAI_DEBOOTSTRAP_OPTS
		RETVAL=$?
		[[ $verbose = 1 ]] && echo "debootstrap return value: $RETVAL"
		# debootstrap completes with the following message:
		# "I: Base system installed successfully." but the return code is 141
		if [ $RETVAL = 141 ] ; then
			RETVAL=0
		fi
		task_error 801 $RETVAL
	fi
fi


# now we can copy fstab
[ -f $fs ] && mv $fs $fs.old
[ -f $LOGDIR/fstab ] && cp -p $LOGDIR/fstab $fs

# no need for task_extrbase() anymore, everything's set up
skiptask extrbase